17-22 July 2016
Master Cutlers Hall
Europe/London timezone
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Contribution List

Displaying 184 contributions out of 184
A highly significant and spatially extended excess of GeV gamma-rays has been observed by Fermi LAT in the Inner Galaxy. While the excess’s spectrum and morphology are consistent with a dark matter annihilation interpretation, the excess has also been interpreted to be the emission from a population of unresolved point sources. We present a Bayesian method for producing probabilistic catalogues ... More
Presented by Mr. Stephen PORTILLO on 18 Jul 2016 at 15:40
XENON100 is a liquid xenon dual phase time projection chamber (TPC) built to search for rare collisions with WIMP particles. The TPC detection principle allows for measurements of WIMP-induced recoils through two signals: a prompt scintillation signal and an ionization signal. In previous XENON100 analyses the recoil energy was determined using the size of the scintillation signal. WIMPs with a m ... More
Presented by Mr. Andrea TISENI on 18 Jul 2016 at 15:20
Session: Theory
Direct detection (DD) experiments and Neutrino telescopes (NT) will play a pivotal role in shedding light on the nature of dark matter during the next decade. An effective theory approach is a solid strategy to interpret DD experiments and NT observations when the momentum transferred in the dark matter scattering by nuclei is small compared to the mass of the particle mediating the interaction. I ... More
Presented by Dr. Riccardo CATENA on 19 Jul 2016 at 16:30
The MAJORANA Collaboration has assembled an array of high purity Ge detectors to search for neutrinoless double-beta decay in $^{76}$Ge with the goal of establishing the required background and scalability of a Ge-based next-generation tonne-scale experiment. The MAJORANA DEMONSTRATOR consists of 44 kg of high-purity Ge (HPGe) detectors (30 kg enriched in $^{76}$Ge) with a low-noise p-type point ... More
Presented by Thomas CALDWELL on 18 Jul 2016 at 15:40
Presented by Prof. Frank LINDE on 22 Jul 2016 at 12:50
Session: Noble Gas
The Large Underground Xenon (LUX) dark matter search is a 350-kg (250-kg active) mass dual-phase xenon-based time projection chamber that operates by detecting light and ionization signals from particles incident upon a xenon target. With its 2013 report of the world’s first sub-zeptobarn spin-independent WIMP-nucleon cross section limit, LUX emerged as a frontrunner in the field of dark matter ... More
Presented by Dr. Nicole LARSEN on 21 Jul 2016 at 17:30
Session: Axion
The Large Underground Xenon (LUX) experiment is a 350 kg liquid xenon time projection chamber (TPC) designed to directly detect galactic dark matter. Xenon detectors present suitable features to detect dark matter candidates other than WIMPs, such as axions, because of the extremely low radioactivity background for electronic recoils they can provide. LUX can probe both axions coming from the Su ... More
Presented by Ms. Maria Francesca MARZIONI on 19 Jul 2016 at 15:40
Weakly Interacting Massive Particles (WIMPs) are one of the leading candidates for the undetected mass component comprising ~27% of the observable universe. An excess in the nuclear-recoil event rate measured by a detector, combined with an annual periodicity introduced by the revolution of the Earth about the Sun, is an important indicator of the direct detection of particle dark matter. The Cry ... More
Presented by Danielle SPELLER on 20 Jul 2016 at 16:50
The purpose of the Super Cryogenic Dark Matter Search (SuperCDMS) experiment is to detect germanium nuclei recoiling after interacting with weakly-interacting massive particles from the galactic halo. It consists of a 9.2 kg germanium target arranged in fifteen single-crystal detectors, and it has been operating at Soudan Underground Laboratory between March 2012 and December 2015. Given the very ... More
Presented by Mr. ELIAS LOPEZ ASAMAR on 20 Jul 2016 at 15:00
There is ample evidence from astronomical and cosmological data for the existence of dark matter. The exploration of its nature is pursued by a whole range of experiments, including cosmological surveys, particle colliders, direct and indirect detection experiments. Direct detection experiments have stringent background requirements due to the presence of environmental radioactivity and cosmic ... More
Presented by Mr. Frederic MOUTON
Session: Theory
I will present the results of Galbayes, the largest ever fully-numerical neural-network-assisted study of the cosmic ray (CR) propagation parameters. We show that in the most commonly-used diffusion-reacceleration model there is significant tension between the propagation parameters that govern protons and antiprotons, vs the light elements including B/C, which are customarily used to calibrate CR ... More
Presented by Dr. Aaron VINCENT on 20 Jul 2016 at 16:50
Bolometric detection at cryogenic temperatures is a very a powerful technique to detect the nuclear recoils induced by the collision of WIMPs from our galactic halo on a laboratory target. The possibility to combine the phonon signal with either an ionization or scintillation signal results in an efficient rejection of the background from electron recoils. The excellent energy resolution opens the ... More
Presented by Jules GASCON on 22 Jul 2016 at 09:00
It has long been known that axions produced by vacuum realignment during the QCD phase transition in the early universe form a cold degenerate Bose gas and are a candidate for the dark matter. More recently it was found that dark matter axions thermalize through their gravitational self-interactions and form a Bose-Einstein condensate (BEC). On timescales long compared to their rethermalization ... More
Presented by Prof. Pierre SIKIVIE on 19 Jul 2016 at 11:20
Boulby is the UK's deep underground science facility, operating in a working potash and salt mine in the North East of England. Boulby has hosted the UK's dark matter search studies for many years including the NAIAD, DRIFT and ZEPLIN programmes. Dark Matter search studies continue at Boulby with the DRIFT programme, R&D for DM-Ice and LZ material screening with the growing Boulby Underground Germ ... More
Presented by Prof. Sean PALING on 21 Jul 2016 at 15:20
Session: Noble Gas
DEAP-3600 is a single phase liquid argon (LAr) dark matter experiment, located 2 km underground at SNOLAB, in Sudbury, Ontario. The detector has 1 tonne fiducial mass of LAr. Calibration of the DEAP-3600 experiment with optical and tagged radiation sources is ongoing. Two systems are used to characterize the overall detector optical response and to monitor the properties of the PMTs. The first con ... More
Presented by Dr. Nasim FATEMIGHOMI on 19 Jul 2016 at 14:20
Session: Noble Gas
The LUX dark matter experiment is a 350 kg dual-phase liquid xenon time projection chamber located at the Sanford Underground Research Facility, South Dakota. LUX’s primary science run is now complete, and its response to both electron and nuclear recoils across a wide range of energies is the subject of on-going study. This work is critical to interpretation of any potential WIMP signal. I w ... More
Presented by Ms. Sally SHAW on 19 Jul 2016 at 14:00
Session: Directional
Large arrays of aligned carbon nanotubes (CNTs), open at one end, could be used as target material for the directional detection of weakly interacting dark matter particles (WIMPs). As a result of a WIMP elastic scattering on a CNT, a carbon ion might be injected in the body of the array and propagate through multiple collisions within the lattice. The ion may eventually emerge from the surface ... More
Presented by Gianluca CAVOTO on 19 Jul 2016 at 14:00
The EDELWEISS-III collaboration aims to increase the sensitivity for light dark matter ($\sim 1-10\, \mathrm{GeV/c^2}$) by lowering the energy threshold of its detectors. One technique is to operate the massive high purity cryogenic Germanium detectors at high electric fields (up to $50\, \mathrm{V/cm}$). Particle interactions create electron and hole pairs, which drift to the electrodes and produ ... More
Presented by Mrs. Nadine FOERSTER on 18 Jul 2016 at 15:00
Session: Axion
The CAST-CAPP/IBS experiment is a joint effort between the CERN Axion Solar Telescope (CAST) collaboration [1] and the Center for Axion and Precision Physics Research (CAPP/IBS) [2], searching for cold dark matter axions. In this project, tunable rectangular cavities are inserted in the 9T CAST dipole magnet, an LHC prototype, at CERN. The traditional haloscope technique suggested by Sikivie [3 ... More
Presented by Dr. Lino MICELI on 19 Jul 2016 at 15:20
Session: Axion
University of Washington, ADMX uses the most sensitive microwave receiver in the world to look for QCD Axions that convert into microwave photons in the presence of a strong magnetic field. Axion is also a compelling cold dark matter candidate. ADMX is starting its Generation-2 run in the summer of 2016 with upgrades including a dilution refrigerator and tunable quantum noise limited amplifiers. T ... More
Presented by Dr. Rakshya KHATIWADA on 21 Jul 2016 at 15:20
Session: Axion
The Axion Dark Matter eXperiment (ADMX) is conducting a search for dark-matter axions trapped in the halo of the Milky Way Galaxy. Axions, originally postulated to solve the strong CP problem in particle physics, would have been created as cold (non-relativistic) very weakly interacting particles in the early stages of the expansion of the universe. If their mass is in the range 2 to 50 $\mu$eV, a ... More
Presented by Prof. David TANNER on 21 Jul 2016 at 14:20
Session: Theory
Minimal dark matter with a fermionic electroweak quintuplet is a phenomenologically valid dark matter model. I will discuss constraints coming from the renormalisation of this theory, namely vacuum stability, the location of the Landau pole, and the intra-multiplet mass splittings. In particular, I will demonstrate some subtleties and pitfalls in the phenomenologically crucial problem of calcul ... More
Presented by Mr. James MCKAY on 20 Jul 2016 at 15:40
Session: Theory
In this talk, I show at first the effect of a non-negligible threshold energy on the reconstruction of the one-dimensional velocity distribution of Galactic WIMP Dark Matter by using our model-independent data analysis procedure. Then I will discuss the modification of our expressions for correcting this effect for light WIMPs and present some numerical results of our Monte-Carlo simulations.
Presented by Prof. Chung-Lin SHAN on 19 Jul 2016 at 17:30
Recent years have seen increased theoretical and experimental efforts towards the first-ever detection of cosmic-ray antideuterons, in particular as an indirect signature of dark matter annihilation or decay. In contrast to indirect dark matter searches using positrons, antiprotons, or gamma-rays, which suffer from relatively high and uncertain astrophysical backgrounds, searches with antideuteron ... More
Presented by Philip VON DOETINCHEM on 18 Jul 2016 at 14:00
Session: Other Techniques
Cryogenic phonon-scintillation detectors (CPSD) for rare event search experiments require reliable, efficient and robust photon detectors that can resolve individual photons in a scintillation event. We report on a cryogenic detector containing a scintillating crystal, equipped with an NTD-Ge phonon sensor and a photon detector based on a low-temperature photomultiplier tube (PMT) that is powered ... More
Presented by Mr. Junsong LIN on 19 Jul 2016 at 17:30
Session: Directional
Building on the success of operating Time Projection Chambers (TPCs) for directional neutron detection the D3 project is designing a Negative Ion TPC (NITPC) as a directional dark matter detector prototype with high definition (HD) pixel chip readout. In addition SF6 has recently been proposed as a possible replacement for the CF4/CS2 negative ion mixture and it has been observed that gain is ach ... More
Presented by Mr. Thomas THORPE on 21 Jul 2016 at 16:30
on 18 Jul 2016 at 15:40
Session: Directional
on 21 Jul 2016 at 15:40
on 20 Jul 2016 at 17:30
on 20 Jul 2016 at 17:10
Session: Directional
on 21 Jul 2016 at 17:30
Session: Axion
on 21 Jul 2016 at 17:50
on 18 Jul 2016 at 17:30
on 18 Jul 2016 at 17:50
on 18 Jul 2016 at 17:30
Session: Theory
We consider the indirect detection signals for a self-consistent hidden U (1) sector, containing a fermionic dark matter candidate, dark gauge boson and a Dark Higgs. The presence of an additional scalar, the Dark Higgs, provides a mass generation mechanism for the dark sector particles and is required to avoid unitarity violation at high energies. It also opens up a new process that can probe ... More
Presented by Dr. Yi CAI on 20 Jul 2016 at 15:20
I will talk about the problem of neutrinos as a difficult background for dark matter direct detection experiments. I will present new work describing ongoing efforts to mitigate against this background. I will also talk about embracing the problem and using dark matter detectors to do neutrino physics, in particular I will describe tests of solar physics and the standard model which can be perfo ... More
Presented by Malcolm FAIRBAIRN on 22 Jul 2016 at 12:30
Session: Noble Gas
The XENONnT dark matter experiment aims for the direct detection of weakly-interacting dark matter particles (WIMPs) with an order of magnitude higher sensitivity than its predecessor, XENON1T. By utilising the existing infrastructure of the XENON1T experiment, currently in commissioning at the Laboratori Nazionali del Gran Sasso (LNGS), an upgrade to a multi-ton scale detector can be rapidly real ... More
Presented by Dr. Michelle GALLOWAY on 21 Jul 2016 at 16:50
The Cryogenic Underground Observatory for Rare Events (CUORE) is a ton-scale neutrinoless double beta decay experiment based on TeO2 cryogenic bolometers that is currently in the last stage of construction at the Gran Sasso National Laboratory (LNGS). Its primary goal is to observe neutrino-less double beta decay of 130Te, with a projected sensitivity reaching the inverted hierarchy region of the ... More
Presented by Gabriele PIPERNO on 20 Jul 2016 at 16:30
Session: Theory
We present the results of $N$-body/smoothed particle hydrodynamics simulations of galaxy cluster collisions with a two component model of dark matter, which is assumed to consist of a predominant non-interacting dark matter component and a 20\% mass fraction of dark plasma. Dark plasma is an intriguing form of interacting dark matter with an effective fluid-like behavior, which is well motivated b ... More
Presented by Mr. Tiit SEPP on 20 Jul 2016 at 17:10
Abstract: The first phase of stellar evolution in the history of the Universe may be Dark Stars (DS), powered by dark matter heating rather than by nuclear fusion. Weakly Interacting Massive Particles, which may be their own antipartners, collect inside the first stars and annihilate to produce a heat source that can power the stars. A new stellar phase results, a Dark Star, powered by dark m ... More
Presented by Prof. Katherine FREESE on 22 Jul 2016 at 11:00
In this talk I will review models in which a dark energy scalar field mediates a fifth force between dark matter particles. In such theories, the accelerated expansion of the universe is due to the energy density of the scalar field while its field value determines the dark matter particle mass. I will discuss motivations for such models and describe their cosmological consequences.
Presented by Prof. Carsten VAN DE BRUCK on 18 Jul 2016 at 11:00
The PICO collaboration uses superheated detector technology in order to detect WIMP interactions and has deployed a 2 litre (PICO-2L), and a 32 litre (PICO 60) bubble chamber detector in the SNOLAB underground laboratory. A second WIMP search experimental run with PICO-2L was conducted last summer after carefully controlling for particulate contamination, and the obtained results clearly show the ... More
Presented by Mr. Chanpreet AMOLE on 22 Jul 2016 at 11:50
Session: Noble Gas
Dark matter searches through the limit provided by neutrino-induced nuclear recoils will require background-free exposures of several hundreds of tonnes per year. With its powerful power of rejection of beta/gamma background in favor of the selection of nuclear recoil and low internal background, depleted argon is the ideal target for this endeavor. On the heels of the successful procurement of ... More
Presented by Prof. Giuliana FIORILLO on 19 Jul 2016 at 15:00
I will discuss some of the techniques currently in use for the direct calibration of the response of dark matter detectors. This will include both nuclear recoil and electron recoil events. I will focus on the most innovative and entertaining techniques that have been developed which have allowed the accurate measurement of the response of detectors to dark matter and to a range of backgrounds. I ... More
Presented by Prof. Richard GAITSKELL on 20 Jul 2016 at 10:00
Session: Noble Gas
Two-phase liquid noble gas detectors for rare event search experiments require a precise knowledge of the liquid-gas interface position. This is often provided through liquid level monitoring sensors. In this talk I will report on a newly developed method of differential capacitive measurement that can be employed in capacitive sensors. The feedback circuit design enables the measurement of small ... More
Presented by Ms. Kathryn BOAST on 19 Jul 2016 at 15:40
The search for WIMP dark matter by direct detection faces an encroaching background due to coherent neutrino nucleus scattering. In this talk I will review the various types of neutrino that are backgrounds to direct detection - Solar, supernovae and atmospheric neutrinos - and explain how their presence results in the theoretical limit known as the neutrino floor. The proximity of the neutrino fl ... More
Presented by Mr. Ciaran O'HARE on 18 Jul 2016 at 12:20
Session: Directional
In order to perform Directional DM detection, low energy nuclear recoil tracks have to be detected. The MIMAC collaboration has recently reported the first detection of 3D nuclear tracks coming from the Radon progeny confirming the possibility to perform this kind of measurement with an ionization quenching measurement on these heavy nucleus. The nuclear recoils produced by monochromatic neutron ... More
Presented by Dr. Daniel SANTOS on 21 Jul 2016 at 14:40
Session: Directional
Direction reconstruction provides a unique way to positively identify signal interactions induced by dark matter particles, thanks to the motion of the earth through the galactic dark matter halo. Directional information can additionally serve as a powerful discriminant against neutron (and neutrino-induced) backgrounds that have the same final-state signature as a signal interaction. The Dark Mat ... More
Presented by Mrs. Gabriela DRUITT on 19 Jul 2016 at 15:40
Radio galaxies are active galactic nuclei containing supermassive black holes with misaligned relativistic jets. Centaurus A (Cen A) is the closest known gamma-ray emitting radio galaxy. In this talk I will report the discovery of a hardening in the *Fermi*-LAT gamma-ray spectrum of the core of Cen A above 2.4 GeV, as well as evidence for variability below 2.4 GeV. These properties strongly suppor ... More
Presented by Mr. Thomas LACROIX on 18 Jul 2016 at 15:20
Starting from the achieved sensitivity of EDELWEISS-III with its FID800 Ge detector technology, we present the planning and actions for the next measurement phase. This will concentrate on the usage of Ge bolometers with voltage-assisted amplified heat signals (so-called Neganov-Luke mode) to explore the parameter space for low mass WIMPs (down to m~1GeV). Significant improvements in sensitivity c ... More
Presented by Dr. Klaus EITEL on 21 Jul 2016 at 12:00
Session: Theory
An effective field theory (EFT) approach allows us to describe WIMP interactions as point-like, regardless of the specific fundamental theory at higher energies. We consider simultaneously all phenomenologically relevant EFT operators for scalar DM and perform a global statistical analysis. We identify the most probable regions of the theory parameter space compatible with experimental constraints ... More
Presented by Sebastian LIEM on 20 Jul 2016 at 16:30
Presented by Prof. Neil SPOONER
Periodic variations in the event rate of direct detection experiments can be a signal of dark matter. An event rate modulation with a period of one year, annual modulation, can be explained as an effect of the Earth's orbital motion and the Earth-Sun system moving through the galactic dark matter halo. The XENON collaboration has performed a search for event rate modulation using ~225 livedays of ... More
Presented by Mr. Bart PELSSERS on 20 Jul 2016 at 14:00
Since the beginning of operation, the MAGIC Cherenkov telescopes have been a powerful tool for exploring the Physics frontier, addressing topics such as the nature of dark matter, and its distribution in the Universe, or the search for quantum gravitational effects in photon propagation. I present here an overview of status and results of the main MAGIC fundamental Physics projects, specially focu ... More
Presented by Mr. Joaquim PALACIO NAVARRO on 22 Jul 2016 at 11:30
LUX-ZEPLIN (LZ) is a two-phase xenon dark matter direct detection experiment due to be built in the Sanford Underground Research Facility (SURF) in Lead, South Dakota, USA. It will be among the most sensitive experiments of its kind, putting new constraints on the WIMP-nucleon interaction cross-section. The design of the analogue electronics signal chain consists of photomultiplier tubes, cabling, ... More
Presented by Mr. Cees CARELS
We show that fluid dynamics applied to galactic Cold Dark Matter (CDM) leads to a family of purely theoretical galactic density profiles that includes the popular Navarro-Frenk-White profile, and diverge at the halo core. When CDM is treated as a Bose-Einstein condensate, the resolution of the fluid dynamics equations leads to a finite halo core, hence avoiding the “cuspy halo problem” found i ... More
Presented by Dr. Luca VISINELLI on 22 Jul 2016 at 08:30
I will present results on the analysis of gamma-ray emission from the recently discovered dwarf galaxy Reticulum II. Using Fermi-LAT data and a suite of background models we quantify the probability that the observed gamma-ray emission is due to background. Reticulum II is found to have the most significant gamma-ray emission from any other known dwarf galaxy. I will also discuss the dark matte ... More
Presented by Prof. Savvas KOUSHIAPPAS on 18 Jul 2016 at 14:40
Session: Theory
Up to a few year ago the standard paradigm for Dark Matter search at LHC was the use of Effective Field Theories. It was pointed out, however, that the validity of the EFT approach might be questionable at LHC. Because of this, recently the both theory and experimental communities switched to the use of "Simplified Models", that are models that contain only renormalizable interactions. To keep the ... More
Presented by Dr. Giorgio BUSONI on 20 Jul 2016 at 17:50
The present status of direct detection of Dark Matter (DM) particles will be summarized, with particular care to the DAMA model-independent DM annual modulation results. Arguments on comparisons will be addressed showing that there is large room for compatibility between positive signals and negative hints, considering both the different adopted procedures and techniques, the different experimenta ... More
Presented by Prof. Pierluigi BELLI on 20 Jul 2016 at 12:40
Session: Theory
When comparing constraints on the WIMP properties from direct and indirect detection experiments it is crucial that the assumptions made about the dark matter (DM) distribution are realistic and consistent. If the Fermi-LAT Galactic centre GeV gamma-ray excess was due to WIMP annihilation, its morphology would be incompatible with the Standard Halo Model that is usually used to interpret data from ... More
Presented by Prof. Anne GREEN on 19 Jul 2016 at 16:50
Session: Other Techniques
Detailed nuclear-structure calculations were made to predict the rate of the M1 excitation of $^{125}$Te from the 1/2$^+$ ground state to the first excited 3/2$^+$ state at 35.5-keV, by the collision with WIMPs in our galactic halo. A complete calculation of the relevant spin structure was performed in the framework of the shell model. The valance space included the orbits: 1g$_{7/2}$, 2d$_{5/2}$, ... More
Presented by Prof. Frank AVIGNONE on 19 Jul 2016 at 16:30
Presented by Prof. Neil SPOONER on 18 Jul 2016 at 08:50
One of the remaining puzzles in physics is the composition of the Universe. Now days we believe that it is made of about 5% ordinary matter, 25% dark matter and 70% of dark energy. Our knowledge about the nature of the dark constituents of the Universe is very feeble. They were introduced to explain some observational data. In particular the dark energy was introduced to explain the observed accel ... More
Presented by Dr. Marin KARUZA on 18 Jul 2016 at 17:30
LOW ENERGY NEUTRINO PHYSICS AND DARK MATTER SEARCHES WITH SUB-KEV GERMANIUM DETECTORS Manoj Kumar Singh(*) and Henry T. Wong (on behalf of the TEXONO and CDEX Collaborations) Institute of Physics, Academia Sinica, Taipei 11529, Taiwan. (*) email: manoj@gate.sinica.edu.tw Germanium ionization detectors with sensitivities as low as 100 eVee [1] open a new windows for the studies of neu ... More
Presented by Dr. Manoj Kumar SINGH on 18 Jul 2016 at 14:20
The fluxes and flux ratios of charged elementary particle in cosmic rays are presented. In the absolute rigidity range ~60 to ~500 GV, the antiproton, proton, and positron fluxes are found to have nearly identical rigidity dependence and the electron flux exhibits a different rigidity dependence. Below 60 GV, the antiproton-to-proton, antiproton-to-positron and proton-to-positron flux ratios each ... More
Presented by Dr. Andrei KOUNINE on 21 Jul 2016 at 09:00
Session: Directional
The DRIFT (Directional Recoil Identification From Tracks) experiment is the world leading directional dark matter detector in terms of sensitivity, searching for a galactic signature from WIMP-induced nuclear recoils. DRIFT has been running background free for over a year and the latest results from this data will be presented, along with recent studies on the directional capabilities of the detec ... More
Presented by Prof. Neil SPOONER on 21 Jul 2016 at 15:00
Dark matter could be detected indirectly through the observation of neutrinos produced in dark matter self-annihilations or decays. Data collected with the world's largest neutrino telescope, IceCube, has been searched for such signatures and stringent constraints have been placed on dark matter models. Limits on spin-dependent and spin-independent scattering of dark matter with nucleons based on ... More
Presented by Prof. Carsten ROTT on 19 Jul 2016 at 10:00
The unidentified emission line from galaxies and cluster at 3.5 keV discovered in 2014 remains an interesting candidate for a dark matter decay signal. I will briefly review the existing work and arguments, and then present and discuss the current status of this signal and the latest results, such as the studies of the Draco satellite galaxy and the Perseus galaxy cluster.
Presented by Mr. Jeroen FRANSE on 20 Jul 2016 at 12:00
Session: Axion
The main research focus of the IBS Center for Axion and Precision Physics Research (CAPP) is to establish a state-of-the-art axion experiment in Korea and to search for relic axion particles converting to microwave photons in a resonant cavity submerged in a strong magnetic field. The initial stage of building our axion experiment, CULTASK (CAPP Ultra Low Temperature Axion Search in Korea) is comp ... More
Presented by Dr. Woohyun CHUNG on 21 Jul 2016 at 14:00
Session: Theory
We construct models of dark matter with suppressed spin-independent scattering cross section utilizing the existing simplified model framework. Even simple combinations of simplified models can exhibit interference effects that cause the tree level contribution to the scattering cross section to vanish, thus demonstrating that direct detection limits on simplified models are not robust when ... More
Presented by Dr. Arghya CHOUDHURY on 20 Jul 2016 at 14:40
The most appealing Dark Matter particle candidates are Axions and WIMPs. The WIMP lower-mass end (around 10 GeV) is a relatively unexplored parameter space region, lately attracting increasing interest of the community, and potentially within reach of current detector technologies. Exceeding the upper bounds on the WIMP-nucleon spin-independent cross-section at such low masses requires the use o ... More
Presented by Dr. Javier GRACIA GARZA on 18 Jul 2016 at 16:30
Several anomalies were reported by neutrino oscillation experiments in the past few years. The most momentous explanation conjoining these anomalous observations is the existence of a light sterile neutrino. Although not interacting weakly, a sterile neutrino would participate in the lepton flavor mixing and therefore distort the oscillation patterns predicted by the three flavor paradigm. Global ... More
Presented by Dr. Julia HASER on 18 Jul 2016 at 12:40
In this talk the main features of the Liquefied Noble gases will be reported and discussed. Then an overview of the experimental applications is presented and an emphasis will be put in discussing the Liquefied Noble gases as optimal active target in the field of the Dark Matter search.
Presented by Dr. Marcello MESSINA on 19 Jul 2016 at 09:30
Session: Theory
Direct detection experiments aim to detect the interaction of Galactic Dark Matter (DM) with terrestrial nuclei. But many of these DM particles will pass through the Earth before reaching the detector. During this transit, they may interact and scatter, altering their distribution at the Earth's surface. I will sketch the first fully self-consistent calculation of this ‘Earth-Shadowing’ effect ... More
Presented by Dr. Bradley KAVANAGH on 19 Jul 2016 at 17:10
There are competing claims that the dark matter may have already been discovered through the annihilation of cold dark matter or the decay of warm dark matter. Both hypotheses result in indistinguishable model universes on the large scales probed by temperature anisotropies in the microwave background radiation and the clustering of galaxies. The identity of the dark matter, however, manifests it ... More
Presented by Carlos FRENK on 18 Jul 2016 at 09:10
The IBS Center for Underground Physics in Daejeon, Korea supports a number of low-background rare-event physics experiments including the KIMS-Nai and LZ dark matter searches, the AMoRE double beta decay search, and the NEOS short-baseline reactor-neutrino oscillation experiment. As with all such experiments, reduction of background rates from long-lived radioactive decays and cosmogenic sources ... More
Presented by Dr. Douglas LEONARD on 20 Jul 2016 at 16:30
Presented by Dr. Douglas LEONARD
When constructed, the LZ experiment will represent the most sensitive dark matter detector to date. In order to reach this sensitivity, the selection of materials used in construction is of paramount importance. The LZ collaboration has developed a wide ranging suite of materials screening instruments in both the US and the UK to characterise the intrinsic radioactivity of all components that will ... More
Presented by Dr. Paul SCOVELL on 20 Jul 2016 at 14:40
Session: Noble Gas
The response of a liquid xenon (LXe) detector based on scintillation is strongly dependent on the light collection efficiency, which in turn is critically dependent on the reflectance of the surfaces that surround the active volume. To improve the light collection in WIMP-search detectors using LXe as the sensitive medium, the active volume is usually surrounded by polytetrafluoroethylene (PT ... More
Presented by Francisco NEVES on 19 Jul 2016 at 14:40
The EDELWEISS collaboration has operated an array of 24 germanium detectors, with the objective of performing a low WIMP mass search with a total exposure close to 3000 kgd. The experiment is located in the Laboratoire Souterrain de Modane (LSM) and protected by an overburden of rock of 1800m (4800 mwe) that reduces the cosmic ray flux down to 5 μ/m2/d. The energy resolutions achieved with thes ... More
Presented by Dr. Silvia SCORZA on 20 Jul 2016 at 15:40
Session: Axion
The International Axion Observatory (IAXO) is a proposed 4th generation axion helioscope that will look for axions and ALPs originating in the Sun via the Primakoff conversion of the solar plasma photons. The baseline detection technique for IAXO are ultra-low background Time Projection Chambers (TPC) with a thin window for the entrance of x-rays and pixelated Micromegas readout, manufactured with ... More
Presented by Ms. Elisa RUIZ-CHOLIZ on 21 Jul 2016 at 14:40
Session: Axion
Light pseudo-Nambu-Goldstone bosons (pNGBs) such as, e.g. axion-like particles, that are non-thermally produced via the misalignment mechanism are promising dark matter candidates. An important feature of pNGBs is their periodic potential, whose scale of periodicity controls all their couplings. As a consequence of the periodicity the maximal potential energy is limited and, hence, producing the o ... More
Presented by Viraf MEHTA on 21 Jul 2016 at 17:30
Presented by Dr. Vitaly KUDRYAVTSEV on 20 Jul 2016 at 16:50
NEWAGE is a direction-sensitive direct dark matter search experiment. NEWAGE uses a micro-TPC with a detection volume of 30 by 30 by 40 cm^3 read by one of the MPGD variations, \mu-PIC. We have been performing underground measurement since 2013 with a new detector NEWAGE-0.3b’. We published the best direction-sensitive limits in PTEP (2015) 043F01s with 30 days’ live time data. We continued th ... More
Presented by Prof. Kentaro MIUCHI on 20 Jul 2016 at 12:20
The NEWS (New Experiment With Sphere) collaboration look for the low energy events using spherical gaseous detectors. The main characteristics of this detector are: low energy threshold (≈10's of eV) and the possibility to use large range of target mass, from helium to xenon. I will present experimental set-up and results of calibration run taken by the Sedine detector, a low background prototyp ... More
Presented by Mr. Alexis BROSSARD on 18 Jul 2016 at 16:50
Session: Directional
We will present an R&D project for the realization of an original and innovative detector for directional Dark Matter searches, that will combine the advantages of a Negative Ions Time Projection Chamber (NITPC) with the benefits of triple GEM amplification and pixelated readout (GEMPix). In a NITPC, negative ions drift rather than free electrons, drastically reducing diffusion thanks to their hig ... More
Presented by Mrs. Elisabetta BARACCHINI on 21 Jul 2016 at 16:50
Session: Theory
In this talk we will discuss the relic density and indirect signals from CRs and diffuse gamma rays of TeV-scale neutralino dark matter in the pMSSM. A recently developed framework enables us to calculate the Sommerfeld-enhanced relic density in general MSSM scenarios, properly treating mixed states and multiple co-annihilating channels as well as including off-diagonal contributions. We will pres ... More
Presented by Dr. Andrzej HRYCZUK on 20 Jul 2016 at 14:00
I will discuss the prospects for separating dark matter and neutrino interactions in direct searches, and for using these searches to study the properties of neutrinos and their astrophysical sources.
Presented by Louis STRIGARI on 18 Jul 2016 at 12:00
Session: Axion
Axions coupled to quarks can be produced in the solar core by the decay of thermally excited nuclear states. Here we consider 14.4 keV axions from Fe-56 detected by coherent Bragg-Primakoff conversion to x-rays in crystals. The locus of points that satisfy the Bragg condition lie on a set of circles, one for each reciprocal vector, on the celestial sphere, and as the path of the Sun crosses one ... More
Presented by Prof. Richard CRESWICK on 21 Jul 2016 at 16:30
The EDELWEISS-III experiment, located in the low background environment, the Frejus laboratory, used an array of twenty-four 800g detectors to search directly the Dark Matter under the form of WIMPs. Data have been taken during 8 month with these heat-and-ionization cryogenic detectors fully covered with interleaved electrodes to improve the near surface events rejection. We present the limits ... More
Presented by Mrs. Véronique SANGLARD on 20 Jul 2016 at 09:30
I will present several new methods that we currently employ to make progress in indirect dark matter searches. (1) A wavelet fluctuation analysis of gamma-ray data from the inner Galaxy. Using this method we find strong support for the millisecond pulsar (MSP) hypothesis of the Fermi GeV excess in the Galactic bulge. I will discuss ongoing efforts and plans to search for new pulsar populations ... More
Presented by Dr. Christoph WENIGER on 22 Jul 2016 at 10:00
Session: Directional
Nowadays there is compelling evidence for the existence of dark matter in the Universe. A general consensus has been expressed on the need for a directional sensitive detector to confirm, with a complementary approach, the candidates found in “conventional” searches and to finally extend their sensitivity beyond the limit of neutrino-induced background. We propose here the use of a detector ba ... More
Presented by Giovanni DE LELLIS on 21 Jul 2016 at 14:00
The LUX-ZEPLIN (LZ) experiment is a Generation 2 multi-tonne dark matter direct detection experiment that will operate 4850 feet underground at the Sanford Underground Research Facility in Lead, South Dakota. It will use a 7 tonne liquid xenon TPC to search for the low energy recoils of xenon nuclei as they collide with our local galactic dark matter. LZ builds upon the demonstrated response to ~f ... More
Presented by Dr. James DOBSON on 21 Jul 2016 at 11:20
Axions are well motivated both by particle phenomenlogy and by the dark matter problem, In this talk, I will survey the key techniques and experiments currently searching for evidence of axions in our galactic halo, originating from the sun, or produced in the lab, and the effort to probe the wider parameter space of axion--like particles. Finally, I consider some possible future directions in the ... More
Presented by Dr. Edward DAW on 19 Jul 2016 at 11:40
Approaching its 8th year of operation, the Fermi Large Area Telescope (LAT) provides a window to study potential dark matter (DM) gamma-ray processes with unprecedented sensitivity. Lacking any significant detections, it has yielded important limits on the nature of the DM particle, even beginning to challenge the paradigm of thermally-produced weakly interacting massive particle (WIMP) DM. The ... More
Presented by Brandon ANDERSON on 18 Jul 2016 at 11:30
PandaX-II 500kg liquid xenon dark matter experiment in Jinping, China has been running since spring 2016. In this talk, I will describe the experiment, the result of the first physics commissioning run, and the future plan of the experiment.
Presented by Prof. Xiangdong JI on 21 Jul 2016 at 11:40
Among several WIMP candidates for dark matter, a supersymmetric neutralino with mass around 1 TeV and well defined properties (higgsino-like) has emerged as an attractive and natural candidate in light of measured Higgs boson properties and ensuing implications for supersymmetry. On the other hand, for a wide range of WIMPs, if a dark matter signal is measured in direct or indirect search experime ... More
Presented by Leszek ROSZKOWSKI on 19 Jul 2016 at 09:00
Axions and axion-like particles (ALPs) may be non-thermally produced in the early universe and survive as constituents of dark matter. We describe their theoretical motivation and their phenomenology. A huge region in parameter space spanned by their couplings to the Standard Model particles and their masses can give rise to the observed cold dark matter abundance.
Presented by Andreas RINGWALD on 19 Jul 2016 at 12:40
The status of underground activities of Y2L in Korea is reviewed. And a new underground laboratory is planned at an active iron mine. A plan for the underground laboratory will be explained with the facilities under consideration.
Presented by Prof. Yeongduk KIM on 21 Jul 2016 at 14:40
Session: Theory
Dark matter might exist in the Milky Way as a dark plasma. Such dark matter arises in models where dark matter originates from a hidden sector featuring a massless 'dark photon', including mirror dark matter. In such a scenario, the implications for direct detection experiments are very different from the more commonly studied case of WIMP dark matter. In particular electron recoils can be the dom ... More
Presented by Dr. Robert FOOT on 20 Jul 2016 at 17:30
DEAP-3600 is a single phase liquid argon dark matter experiment, based at SNOLAB, in Sudbury, Ontario. A sensitivity to spin-independent WIMP-nucleon interactions at a cross section of 10-46cm2 is projected at 100GeV WIMP mass. This poster discusses the position reconstruction algorithms in DEAP-3600. Event reconstruction is designed for a spherical liquid scintillator detector with PMTs arranged ... More
Presented by Mr. Navin SEEBURN
In our preceding publication we have provided an improved symmetric model of DWT for Big Bang and investigated how it fits to experimental findings. We have concluded that the visible, dark, total matter and dark energy content ratios in percentages of the world are 5, 21, 26, 74.These theoretical predictions having 15% relative deviation fit to the WMAP data (5,22,27,73). Taking into account t ... More
Presented by Dr. Zoltan ARVAY
I summarize recent constraints on dark matter candidate particles that produce X-ray emission lines, with an emphasis on the sterile neutrino. This includes a discussion of the candidate dark matter feature at ~3.55 keV discovered by stacking XMM-Newton spectrum of 73 galaxy clusters — a method that minimizes statistical and systematic uncertainties. The implications for identifying the dark mat ... More
Presented by Dr. Michael LOEWENSTEIN on 18 Jul 2016 at 17:10
Primordial black holes are black holes that may have formed in the early Universe. Their masses span potentially a range from as low as the Planck mass up to many orders of magnitude above the solar mass. Besides their conceptual importance regarding our understanding of quantum effects and gravity, they may provide the dark matter. In order to constrain this possibility, a proper understanding of ... More
Presented by Dr. Florian KUHNEL on 20 Jul 2016 at 08:30
Poisson regression of the Fermi-LAT data in the inner Milky Way reveals an extended gamma-ray excess. The anomalous emission falls steeply away from the galactic center and has an energy spectrum that peaks at 1-3 GeV. An important question is whether the signal is coming from a collection of unresolved point sources, possibly old recycled pulsars, or constitutes a truly diffuse emission component ... More
Presented by Mr. Tansu DAYLAN on 18 Jul 2016 at 14:20
Session: Axion
The Axion Resonant InterAction Detection Experiment (ARIADNE) is a collaborative effort to search for short-range spin-dependent couplings between nuclei resulting from the QCD axion, using a technique based on nuclear magnetic resonance. The aim is to detect monopole-dipole interactions between the spin of 3He nuclei and a rotating unpolarized tungsten attractor. I will discuss the basic princip ... More
Presented by Prof. Andrew GERACI on 21 Jul 2016 at 15:00
The Hyper-Kamiokande experiment is a proposed next-generation water Cherenkov detector. It will consist of two cylindrical tanks, with a fiducial volume of 400 ktonnes, observed by 20 inch high quantum efficiency PMTs with 40% photocathode coverage. Hyper-K will be able to perform indirect WIMP searches, looking for signals from the Sun, the Earth, and the galactic centre. In such areas, WIMPs can ... More
Presented by Dr. Matthew MALEK on 18 Jul 2016 at 16:30
For rare event searches, the control of inherent backgrounds is essential. Radon remains one of the most prevalent and crucial of these backgrounds for both operating and planned experiments. In this talk I will discuss some of the on-going efforts to monitor and mitigate the impact of radon looking towards a next generation of detectors.
Presented by Darren GRANT on 20 Jul 2016 at 14:00
Radon is a big source of background for many experiments in particle physics, such as searches for dark matter. The facility at Sheffield has undergone recent improvements to the radon screening sensitivity. This will be discussed along with some recent work with Durridge to improve the background from the RAD7 radon detector used in the screening system.
Presented by Mr. Andrew SCARFF on 20 Jul 2016 at 14:20
Presented by Darren GRANT
Radon is a big source of background for many experiments in particle physics, such as searches for dark matter. The facility at Sheffield has undergone recent improvements to the radon screening sensitivity. This will be discussed along with some recent work with Durridge to improve the background from the RAD7 radon detector used in the screening system.
Presented by Mr. Andrew SCARFF
The DarkSide-50 dark matter detector is a two-phase argon TPC installed at Laboratori Nazionali del Gran Sasso at the center of two nested veto detectors, a 30-tonne liquid scintillator neutron veto and a 1,000-tonne water Cherenkov muon veto.  While operating in 2014 with a fill of argon extracted from the atmosphere, DarkSide-50 demonstrated its capability to operate in a background-free mode ... More
Presented by Prof. Giuliana FIORILLO on 19 Jul 2016 at 12:20
The CDEX Collaboration has been pursuing a research program on low mass dark matter searches at the China JinPing Underground Laboratory, located in Sichuan, China, with about 2400 m of rock overburden. We report on the results of low mass WIMPs and axion-like particles searches with a p-type point-contact germanium detector. The exclusion constraints on the WIMP-nucleon spin-independent and spin- ... More
Presented by Prof. Shin-Ted LIN on 18 Jul 2016 at 14:40
1. Detector Characteristics 2. Signal Sensitivity 3. Background 4. Results on Dark Matter Searches using nuclear recoils and e/$¥gamma$ signals
Presented by Prof. Yoichiro SUZUKI on 21 Jul 2016 at 08:30
China JinPing Underground Laboratory (CJPL) is the deepest operational underground laboratory in the world which has about 2400 m of rock overburden, an excellent facility for conducting low event-rate experiments. Two DM experiments (CDEX and PandaX) run in and competitive physical results have been published. CJPL-II laboratory is under construction which the hall volume is about 24 times more t ... More
Presented by Mr. LiTao YANG on 21 Jul 2016 at 12:20
Session: Directional
Projects attempting the direct detection of WIMP dark matter share the common problem of eliminating sources of background or using techniques to distinguish background events from true signals.  Although experiments such as DarkSide have achieved essentially background free exposures through careful choice of materials and application of efficient veto techniques, there will still be a high burd ... More
Presented by Mr. Marco RESCIGNO on 19 Jul 2016 at 15:20
Session: Other Techniques
The PICO collaboration has made significant progress in our understanding of the anomalous background events observed in bubble chamber dark matter searches. It is now understood that the background events are intrinsic to the technology, arising from the use of a normal fluid buffer layer to stabilize the surface of the superheated liquid in the bubble chamber. A new, simplified bubble chamber ... More
Presented by Michael CRISLER on 19 Jul 2016 at 17:10
Session: Axion
Light shining through a wall experiments can be used to make measurements of photon-WISP couplings. The first stage of the CASCADE experiment at the Cockcroft Institute of Accelerator Science and Technology is intended to be a proof-of-principle experiment utilising standard microwave technologies to make a modular, cryogenic HSP detector to take advantage of future high-power superconducting cavi ... More
Presented by Dr. Ian BAILEY on 21 Jul 2016 at 17:10
Astrophysical observations give overwhelming evidence for the existence of dark matter. While the DAMA collaboration has asserted that they observe a dark matter-induced annual modulation signal, other direct detection dark matter experiments have yet to confirm this observation. DM-Ice17, a prototype experiment consisting of 17kg of NaI(Tl) detectors, has been continuously operating at the South ... More
Presented by Jay Hyun JO on 20 Jul 2016 at 14:20
The dwarf galaxies surrounding the Milky Way provide a unique and powerful way to explore the nature of dark matter. They are the most extreme dark matter dominated objects known to us with central mass to light ratios typically of the order of tens to hundreds. Through measurements of their stellar kinematics, we can study their dark matter content in exquisite precision. This allows us to probes ... More
Presented by Dr. Mei-Yu WANG on 18 Jul 2016 at 16:50
Session: Other Techniques
PICO 60 is a 32 litre bubble chamber for dark matter search that was operated with 38kg CF$_3$I in until May 2014. In summer 2016 PICO 60 was refilled with C$_3$F$_8$ and is currently being operated at SNOLAB. Between the first and second run new a water system, an internal filtration system and a refurbished muon veto system were added to the detector. The detector is now read out by four fast ca ... More
Presented by Prof. Carsten KRAUSS on 19 Jul 2016 at 16:50
The SABRE (Sodium iodide with Active Background REjection) experiment aims to detect WIMP dark matter by its annual modulation signature. Such a modulation has been measured by the DAMA/LIBRA experiment in NaI(Tl) crystals. However, the interpretation as WIMP signal is controversial due to contradicting results by other experiments with different target materials. Using an array of high-purity ... More
Presented by Mrs. Francis FROBORG on 20 Jul 2016 at 15:00
The Short-Baseline Near Detector (SBND) is one of three liquid argon time projection chamber detectors to be situated along the Booster Neutrino Beamline (BNB) at Fermilab and form the Fermilab Short-Baseline Neutrino (SBN) Program. SBND is scheduled to begin operations in 2018. The detector will be situated at merely 110 m from the BNB proton target, which is an ideal location for recording an un ... More
Presented by Georgia KARAGIORGI on 18 Jul 2016 at 14:00
Presented by Karl VAN BIBBER on 22 Jul 2016 at 13:10
Cosmological observations indicate that our universe contains dark matter (DM), yet we have no measurements of its microscopic properties. To detect DM with mass below 1GeV, the sensitivity limit of current direct-detection experiments, and one can use accelerators to search for lower mass boosted DM. With high beam intensity and existing neutrino detectors, the Fermilab Booster Neutrino Beamline ... More
Presented by Dr. Teppei KATORI on 18 Jul 2016 at 14:20
DEAP-3600 is a single-phase liquid argon detector, which searches for dark matter particle interactions with 1 tonne fiducial target mass (3.6 tonnes total) contained in an ulta-pure acrylic vessel viewed by 255 high quantum efficiency photomultiplier tubes. It is located 2 km underground at SNOLAB, in Sudbury, Ontario. Radioactive backgrounds are controlled through pulse-shape discrimination i ... More
Presented by Dr. Marcin KUZNIAK on 22 Jul 2016 at 12:10
T2K (Tokai-to-Kamioka) is a second-generation long-baseline accelerator experiment that studies neutrino oscillations using an intense beam of muon neutrinos produced by the the 30 GeV proton synchrotron at J-PARC. The near detector complex ND280 consists of different sub-detectors, including time-projection chambers (TPCs), scintillator tracking detectors and calorimeters, operated inside a magne ... More
Presented by Dr. Alexander IZMAYLOV on 18 Jul 2016 at 14:40
The CRESST-III (Cryogenic Rare Event Search with Superconducting Thermometers) experiment, located in the Gran Sasso underground laboratory (LNGS, Italy), aims at the direct detection of dark matter (DM) particles. Scintillating CaWO$_{4}$ crystals operated as cryogenic detectors are used as target material for elastic DM-nucleus scattering. The simultaneous measurement of the phonon signal from ... More
Presented by Dr. Paolo GORLA on 19 Jul 2016 at 11:00
Dark Matter can be produced in large amounts in pp collisions at the Large Hadron Collider (LHC) assuming it interacts non-gravitationally with Standard Model particles. While Dark Matter escapes direct detection at the LHC, it leaves a distinct signature of significant missing transverse momentum. In this talk, recent results from the ATLAS and CMS detectors will be presented, based on events wit ... More
Presented by Prof. Gabriella SCIOLLA on 20 Jul 2016 at 09:00
Indirect detection experiments, which search for gamma rays produced in dark-matter annihilation or decay, provide a promising avenue for discovering and characterizing the dark matter.  I will review the current status of such searches with data from the *Fermi* Large Area Telescope. I will specifically highlight new analysis methods that have helped to shed light on the debate regarding the ... More
Presented by Lisanti MARIANGELA on 22 Jul 2016 at 09:30
Session: Axion
Axions, axion-like particles (ALPs), dilatons, and other ultralight (masses from 10-4 down to 10-23 eV) particles have been discussed as possible candidates for dark matter. An interesting feature of these ideas is that they lead to predictions of potentially observable transient and oscillating effects. I will describe how we are looking for these as well as the relation of such experiments to ... More
Presented by Prof. Budker DMITRY on 19 Jul 2016 at 14:40
Galactic dark matter may scatter on solar nuclei and become captured in the gravitational field of the Sun. I will present our recent and ongoing work on the indirect detection signals arising from the hypothetical solar population of dark matter. The focus of our study is dark matter charged under a hidden U(1)-gauge symmetry.
Presented by Mr. Niklas Grønlund NIELSEN on 18 Jul 2016 at 15:00
Session: Directional
Recent computational results suggest that massive directional dark matter detectors have potentials to probe WIMPs beyond the neutrino floor. Even in a case of WIMP detection claim by conventional detectors before the neutrino floor, a proposed massive directional WIMP search telescope called CYGNUS-TPC can be used to unambiguously confirm the source of the signal. Hence, there is a global effort ... More
Presented by Mr. Anthony EZERIBE on 21 Jul 2016 at 17:10
Many astronomical observations proved that around 27 % of our universe is made up of dark matter. However, the exact nature of it has not been exactly understood. CRESST is one of several experiments dedicated to find dark matter particles through direct detection. CRESST-II detector modules based on scintillating CaWO4 crystals and operated at mK temperatures have the ability to detect light dark ... More
Presented by Mr. Cenk TURKOGLU on 20 Jul 2016 at 15:20
Session: Axion
The Axion Dark Matter eXperiment (ADMX) is a cavity haloscope search for dark matter axions. The Gen 2 version ADMX has the goal of being sensitive to even the pessimistically coupled axions in the well motivated 1-10 GHz frequency region. This will be a significant improvement over previous cavity searches, and have a good chance of discovering the axion, or ruling out an interesting parameter ... More
Presented by Prof. Gray RYBKA on 19 Jul 2016 at 15:00
The ANAIS (Annual Modulation with NaI(Tl) Scintillators) experiment aims at the confirmation of the DAMA/LIBRA signal using the same target and technique at the Canfranc Underground Laboratory, in Spain. 112.5 kg of ultrapure NaI(Tl) crystals will be used as target, divided into 9 modules, 12.5 kg mass each, and coupled to two high efficiency photomultipliers. Present status and prospects of ANAIS ... More
Presented by Dr. María Luisa SARSA on 20 Jul 2016 at 15:40
Session: Axion
I will present the status of the ALPS2 experiment, a new search for axion-like particles that builds upon the successes of the original ALPS experiment and increase projected sensitivity to new physics by 3 orders of magnitude.
Presented by Dr. Mikhail KARNEVSKIY on 21 Jul 2016 at 16:50
Session: Axion
Axions are a leading dark matter candidate, and may be detected by their resonant conversion to a monochromatic RF signal in a tunable microwave cavity permeated by a strong magnetic field. The Axion Dark Matter eXperiment – High Frequency (ADMX-HF) serves both as a innovation platform for cavity and amplifier technologies for the microwave cavity axion experiment, and as a pathfinder for a firs ... More
Presented by Prof. Karl VAN BIBBER on 19 Jul 2016 at 14:00
The KIMS and DM-Ice group under the name of the COSINE collaboration work together to search for nuclear recoils by Weakly Interacting Massive Particle in the NaI(Tl) crystal scintillators at the Yangyang underground laboratory in Korea, targeting at a sensitivity comparable to the DAMA/LIBRA dark matter experiment. The main goal of the COSINE experiment is to confirm or dispute the annual modulat ... More
Presented by Chang Hyon HA on 20 Jul 2016 at 15:20
Session: Directional
The $D^3$ project has been investigating gas Time Projection Chambers with charge readout via pixel chips, a candidate technology for future directional Dark Matter searches. We have constructed a number of small prototypes over several years, and are now at a stage where the detectors operate stably over long time scales, and the 3-D ionization distribution from nuclear recoils can be imaged in d ... More
Presented by Prof. Sven VAHSEN on 21 Jul 2016 at 15:20
The XENON1T detector has been recently deployed at Laboratori Nazionali del Gran Sasso. The experiment features, as target for dark matter, a two-phase Xenon Time Projection Chamber with a 2-tonne active mass. Its unprecedented dimension and the expected low background will allow XENON1T to reach, with a 2 t∙y exposure, a sensitivity to spin-independent WIMP-nucleon interactions of about 1.6∙1 ... More
Presented by Prof. Luca GRANDI on 21 Jul 2016 at 11:00
Session: Axion
Axions are a natural consequence of the Peccei-Quinn mechanism, the most compelling solution to the strong-CP problem. Similar axion-like particles (ALPs) also appear in a number of possible extensions of the Standard Model, notably in string theories. Both axions and ALPs are very well motivated candidates for the Dark Matter, and in addition would be copiously produced at the sun’s interior. T ... More
Presented by Igor IRASTORZA on 19 Jul 2016 at 14:20
I will give an overview of the analyses leading to the recent detection of X-rays from clusters of galaxies and Andromeda consistent with monoenergetic photons from dark matter decay such as that predicted from sterile neutrino dark matter. I shall discuss these signals' potential verification in the very near future. Sterile neutrino dark matter interpretations have implications for outstanding p ... More
Presented by Prof. Kevork ABAZAJIAN on 18 Jul 2016 at 16:30
The directional detection of Dark Matter (DM) proposes to use the existing anisotropy in the angular distribution of the DM-induced recoils in the galactic coordinates to distinguish it from mostly isotropic background. This anisotropy arises naturally from the relative motion of the Solar system within the DM halo. Several techniques have been proposed for a directional detection, including emul ... More
Presented by Dr. Camille COUTURIER on 21 Jul 2016 at 12:40
A review of the current technologies for reducing the energy threshold of direct detection dark matter experiments, with special emphasis on solid state detectors. The goal of this field over the next decade is to reach the neutrino floor in all mass ranges, but doing so for masses less than a GeV/c2 is not only hard, but also stretches the definition of the WIMP candidate. Both established ex ... More
Presented by Prof. Priscilla CUSHMAN on 18 Jul 2016 at 09:40
Session: Directional
As it was reported that ZnWO4 scintillator has the directional sensitivity, we had started to study on ZnWO4 for the dark matter search. To begin with, we investigated responses to alpha particles and measured the wavelength and the decay constant of the scintillation light using a (2mm)^3 crystal. Then we are investigating a (9mm)^3 crystal and some (1cm)^3 crystals. We also mention some plans fo ... More
Presented by Dr. Hiroyuki SEKIYA on 19 Jul 2016 at 14:40
Session: Noble Gas
Dark matter detectors using liquid xenon have reached the tonne-scale with XENON1T, giving them good sensitivity to supernova (SN) neutrino signals via coherent elastic neutrino-nucleus scattering. We perform an S2-only analysis of the expected supernova neutrino signal for four different SN progenitors with different masses and nuclear equations of state in existing and upcoming dual-phase xenon ... More
Presented by Christopher MCCABE on 19 Jul 2016 at 15:20
One of the experimental techniques used for the direct detection of dark matter with noble liquids is the two-phase liquid/gas time projection chamber (TPC). In order to achieve optimal discrimination between nuclear and electron recoils in WIMP searches, large experiments have found it increasingly important to monitor continuously and precisely the detector operating conditions including liquid ... More
Presented by Mr. FengTing LIAO
In ten years of data taking in space, the experiment PAMELA has shown very interesting features in cosmic rays, namely in the fluxes of protons, helium, electrons, that might change our basic vision of the mechanisms of production, acceleration and propagation of cosmic rays in the Galaxy. In particular, remarkable and stimulating have been the measurements of cosmic antiproton and pos ... More
Presented by Valeria DI FELICE on 20 Jul 2016 at 11:30
The Coherent elastic scattering of neutrinos off nuclei was predicted over 40 years ago after the realization of the neutral weak current. This standard-model process remains unobserved due to the daunting technical requirements: very low nuclear recoil energy thresholds, intense sources/large target masses, and low backgrounds. Employing state-of-the-art low-energy-threshold detector technology c ... More
Presented by Prof. Phillip BARBEAU on 18 Jul 2016 at 15:20
The Laboratorio Subterráneo de Canfranc (LSC) is the second largest deep underground facility in Europe. It is located in north of Spain under the Pyrenees at about 2500 m.w.e. depth. LSC has been in full operation since 2010. At LSC 1600 square meters underground are available for research. The LSC is equipped with a number of service facilities to support installation and commissioning of exper ... More
Presented by Dr. Aldo IANNI on 21 Jul 2016 at 15:40
Session: Noble Gas
The end of the evolution of dual phase xenon TPCs will be the DARk matter WImp search with liquid xenoN – the DARWIN experiment. In this talk I will discuss the primary physics goal of DARWIN: the exploration of the full experimentally accessible WIMP cross section and mass parameter space before coherent neutrino interactions dominate the count rate. The aim is to obtain a few times $10^{-49}\m ... More
Presented by Dr. Auke COLIJN on 21 Jul 2016 at 17:10
The present universe is full of dark energy. This observation is now vexing physicists across the world, leading to much theoretical and experimental research. I will review the evidence for dark energy that has dominated the last 15 years in cosmology. I will then looking forward to the next decade and summarise some of the amazing experiments scientists will have available to tackling this myste ... More
Presented by Prof. Bob NICHOL on 21 Jul 2016 at 10:00
The objective of the Karlsruhe Tritium Neutrino experiment (KATRIN) is the measurement of the effective electron neutrino mass with an unprecedented model-independent sensitivity of 200 meV/c$^2$. This will improve present limits by one order of magnitude and allow to constrain the role of relic neutrinos as hot dark matter in structure evolution. A non-zero neutrino mass in the sub-eV range indu ... More
Presented by Dr. Joachim WOLF on 18 Jul 2016 at 10:10
The LUX experiment searches for direct evidence of galactic dark matter. Located roughly 1.5 km underground at the Sanford Underground Research Facility in Lead, South Dakota (USA), the heart of the experiment is a 250 kg active liquid-xenon target, instrumented as a dual-phase (liquid/gas) time projection chamber capable of 3-D position reconstruction and nuclear recoil discrimination. The init ... More
Presented by Dr. Aaron MANALAYSAY on 21 Jul 2016 at 09:30
Session: Noble Gas
The LUX-ZEPLIN (LZ) experiment is a direct dark matter experiment utilizing a liquid xenon time projection chamber (TPC). An LZ system test platform has been constructed at the SLAC National Accelerator Laboratory to develop and validate technologies and instrumentation required by LZ. The testing goal is to ensure that LZ can meet its high voltage and purification requirements, as well as exerci ... More
Presented by Dr. Kimberly PALLADINO on 21 Jul 2016 at 17:50
The Modane Underground Laboratory (LSM) is located 1700 m (4800 m.w.e) below Fréjus peak (Alpes chain) mountain in the middle of the Fréjus tunnel between France/Italy. The LSM is a multi-disciplinary platform for the experiments requiring low radioactivity environment. Several experiments in Particle and Astroparticle Physics, low-level of High Purity of Germanium gamma ray spectrometry, biolo ... More
Presented by Dr. Ali DASTGHEIBI FARD on 21 Jul 2016 at 15:00
The long standing problem of reconciling the cosmological evidence of the existence of dark matter with the lack of any clear experimental observation of it, has recently revived the idea that the new particles are not directly connected with the Standard Model gauge fields, but only through mediator fields or “portals”, connecting our world with new “secluded” or “hidden” sectors. One ... More
Presented by Gabriele PIPERNO on 18 Jul 2016 at 16:50
SHIP is a new general purpose fixed target facility, whose Technical Proposal has been recently reviewed by the CERN SPS Committee and by the CERN Research Board. The two boards recommended that the experiment proceeds further to a Comprehensive Design phase in the context of the new CERN Working group "Physics Beyond Colliders", aiming at presenting a CERN strategy for the European Strategy meeti ... More
Presented by Dr. John BACK on 18 Jul 2016 at 15:00
Many of the outstanding questions in astroparticle and subatomic physics today require the ultra-quiet environment provided by deep underground research facilities. SNOLAB is one such facility, based at a depth of 2km in the Vale Creighton mine near Sudbury, Ontario. In this environment, cosmic radiation induced backgrounds are minimized to levels allowing the operation of sophisticated experi ... More
Presented by Dr. Kenneth CLARK on 21 Jul 2016 at 14:00
The former Homestake gold mine in Lead, South Dakota, has been transformed into a dedicated facility to pursue underground research in rare-process physics, as well as offering research opportunities in other disciplines such as biology, geology and engineering. The Sanford Underground Research Facility (SURF) includes two main campuses at the 4850-foot level (4300 m.w.e.) – the Davis Campus and ... More
Presented by Dr. Jaret HEISE on 21 Jul 2016 at 14:20
There is overwhelming evidence that the Universe contains a significant non-luminous, non-baryonic matter component. The Weakly Interacting Massive Particle (WIMP) is a well motivated candidate for this dark matter. We expect WIMPs to interact with terrestrial targets at a low rate through keV-scale nuclear recoils. The SuperCDMS experiment, located in Soudan Underground Laboratory, collected dat ... More
Presented by Robert CALKINS on 20 Jul 2016 at 11:00
Session: Axion
The QCD axion has been proposed more than 30 years ago to explain the smallness of the neutron's dipole moment. It is an excellent Dark Matter candidate and the search for it has been ongoing ever since its conception. In my talk I will describe two experiments that will explore complementary parts of the axion's parameter space. When the axion's Compton wavelength is tens of microns up to s ... More
Presented by Prof. Asimina ARVANITAKI on 21 Jul 2016 at 15:40
Session: Directional
The detector consists of a large spherical gas volume with a central electrode forming a radial electric field. A small spherical sensor located at the center is acting as a proportional amplification structure. This new concept has been proven to operate in a simple and robust way and allows reading large volumes with a single read-out channel. I will present results on WIMP search taken in the L ... More
Presented by Dr. ioannis GIOMATARIS on 21 Jul 2016 at 14:20
The Korea Invisible Mass Search (KIMS) collaboration had searched for WIMP dark matter signals using an array of ultra-pure CsI(Tl) crystals. Recently KIMS group is actively developing ultra-pure NaI(Tl) crystal to confirm or reject the DAMA/LIBRA claim of an annual modulation signature. For the future of low-mass WIMP detection, KIMS collaboration has started developing cryogenic detector technol ... More
Presented by Dr. Hyunsu LEE on 20 Jul 2016 at 14:40
Type: Oral Session: Low Mass WIMP Searches
The DAMIC (Dark Matter in CCDs) experiment is optimized for low-mass WIMP searches ~ 5 GeV, by using thick, high-resisitivity CCDs with noise below 2 e- (RMS) to achieve ionization energy thresholds below 50 eVee. DAMIC-100 is an upgraded version consisting of 100-gram array of CCDs currently being commissioned at SNOLAB. In this talk, I will present the most recent performance studies and backg ... More
Presented by Junhui LIAO on 18 Jul 2016 at 14:00
Session: Directional
Nuclear Emulsions for WIMP Search (NEWS) is a directional dark matter search experiment using full solid detector. We developed original super-high-resolution nuclear emulsion called Nano Imaging Tracker (NIT) which can detect around 100 nm tracks. We also constructed a new composite readout system for such extremely short tracks. Some recent background rejection techniques also showed remarkable ... More
Presented by Mr. Takashi ASADA on 19 Jul 2016 at 15:00
The study of particle dark matter candidates has seen a trend toward making the smallest number of assumptions on the particle physics and the astrophysics of dark matter. I will present an overview of how this goal is being pursued in the theory and phenomenology of weakly-interacting massive particles as dark matter.
Presented by Prof. Paolo GONDOLO on 19 Jul 2016 at 08:30
Presented by Mr. Frederic MOUTON on 20 Jul 2016 at 17:10
Session: Theory
We propose a new approach to the LHC dark matter search analysis within the effective field theory (EFT) framework by utilising the K-matrix unitarisation formalism. This approach provides a reasonable estimate of the dark matter production cross section at high energies and hence allows to put reliable bounds on the cut-off scale of relevant operators without running into the problem of pertu ... More
Presented by Michael SCHMIDT on 20 Jul 2016 at 14:20
Session: Theory
I will describe the latest technological advances in bringing together complementary probes of dark matter in wholistic, statistically consistent, large-scale global fits to dark matter theories with the GAMBIT framework. I will then detail the latest combined impacts of all searches on popular theories for dark matter including singlet models interacting with the Standard Model through the so-ca ... More
Presented by Pat SCOTT on 20 Jul 2016 at 15:00
Session: Noble Gas
The PandaX (Particle AND Astrophysical Xenon) project is a staged xenon-based underground experiment at the China Jin-Ping Underground Laboratory. In Feb 2016, the second phase half-ton-scale experiment, PandaX-II, released the dark matter search result from the commissioning run with a 306 × 19.1 kg-day exposure. After a krypton distillation campaign, the data taking of the experiment was recent ... More
Presented by Mr. Andi TAN on 21 Jul 2016 at 16:30
We reconsider the problem of determining the warmness of dark matter from the growth of large scale structures. In particular, we have re-analyzed the previous work of Viel et al 2013, based on high resolution Lyman-alpha forest spectra. In fact, the flux power spectrum exhibits a cut-off below ~ 1.5 Mpc/h, this may be explained by the temperature of the intergalactic medium (IGM) or be due ... More
Presented by Dr. Antonella GARZILLI on 18 Jul 2016 at 17:10
Presented by Prof. Richard JONES on 18 Jul 2016 at 09:00
Light Dark Matter (LDM) is an interesting and well motivated alternative to WIMP as a dark matter candidate. Because of its light mass, electron recoil could become a better signal for LDM detection than nuclear recoil. We have applied an *ab initio* method, MCRRPA, to atomic ionization by neutrino or LDM to Ge, Xe and other targets with better than 10% accuracy. The neutrino-atom ionization is im ... More
Presented by Mr. Chih-Pan WU on 18 Jul 2016 at 17:10
Weakly interacting massive particles (WIMPs) are a very promising explanation for the nature of dark matter. The XENON100 experiment aims to detect WIMP-nucleon interactions using a dual phase time projection chamber (TPC) with a total liquid xenon target of 62kg. This talk will focus on the final analysis for spin independent and spin dependent WIMP-nucleon interactions of XENON100 where the thre ... More
Presented by Mr. Ludwig RAUCH on 19 Jul 2016 at 12:00
Session: Directional
Low-background anisotropic scintillators can be reliable detectors to investigate those Dark Matter (DM) candidates inducing just nuclear recoils, through the directionality technique. The directionality is based on the study of the correlation between nuclear recoils direction and Earth motion in the galactic rest frame. In an anisotropic detector, the signal induced by those DM candidates ind ... More
Presented by Dr. Riccardo CERULLI on 19 Jul 2016 at 14:20