BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Domain Wall Formation from Level Crossing in the Axiverse DTSTART;VALUE=DATE-TIME:20151026T055100Z DTEND;VALUE=DATE-TIME:20151026T060800Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-820@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Ryuji Daido (Tohoku university)\nWe point out that d omain wall formation is a more common phenomenon in the Axiverse than prev iously thought. Level crossing could take place if there is a mixing betwe en axions\, and if some of the axions acquire a non-zero mass through non- perturbative effects as the corresponding gauge interactions become strong . The axion potential changes significantly during the level crossing\, wh ich affects the axion dynamics in various ways. We find that\, if there is a mild hierarchy in the decay constants\, the axion starts to run along t he valley of the potential\, passing through many crests and troughs\, unt il it gets trapped in one of the minima\; the axion roulette. The axion dy namics exhibits a chaotic behavior during the oscillations\, and which min imum the axion is finally stabilized is highly sensitive to the initial mi salignment angle. Therefore\, the axion roulette is considered to be accom panied by domain wall formation. The cosmological domain wall problem can be avoided by introducing a small bias between the vacua. We discuss cosmo logical implications of the domain wall annihilation.\n\nhttps://indico.ic rr.u-tokyo.ac.jp/event/23/contributions/820/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/820/ END:VEVENT BEGIN:VEVENT SUMMARY:Cartan's Supersymmetry and the Universe DTSTART;VALUE=DATE-TIME:20151026T064200Z DTEND;VALUE=DATE-TIME:20151026T065900Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-831@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Sadataka Furui (Graduate School of Science and Engin eering\, Teikyo University)\nCartan has proposed a model of number systems given by octonions and a pair of 4 dimensional vector system. Octonions c ontains 2 quaternions or a pair of Dirac particles\nand by the transformat ion G_{23}\, particle-antiparticle transformation occurs\, and by the tran sformations G_{12}\,G_{123}\,G_{13} and G_{132}\, supersymmetric transform ation occur.\nWe extend the model to the system in which quark\, leptons\, gauge fields and Higgs particles are interacting\, and the construct a pi cture of the universe.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contr ibutions/831/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/831/ END:VEVENT BEGIN:VEVENT SUMMARY:Charged Q-balls in gauge mediated SUSY breaking models DTSTART;VALUE=DATE-TIME:20151026T053400Z DTEND;VALUE=DATE-TIME:20151026T055100Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-832@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Jeong-Pyong Hong (Institute for Cosmic Ray Research University of Tokyo)\nIt is known that after Affleck-Dine baryogenesis\, s patial inhomogeneities of Affleck-Dine field grow into non-topological sol itons called Q-balls. In gauge mediated SUSY breaking models\, sufficientl y large Q-balls with baryon charge are stable while Q-balls with lepton ch arge can always decay into leptons. For a Q-ball that carries nonzero $B$ and $L$ charges\, the difference between the baryonic component and the le ptonic component in decay rate may induce nonzero electric charge on the Q -ball. This implies that charged Q-ball\, also called gauged Q-ball\, may emerge in our universe. We investigate two complex scalar fields\, a baryo nic scalar field and a leptonic one\, in an Abelian gauge theory\, and we find stable solutions of gauged Q-balls for different baryon and lepton ch arges. Those solutions shows that a Coulomb potential arises and the Q-bal l becomes electrically charged as expected. It is energetically favored th at some amount of leptonic component decays\, but there is an upper bound on its amount due to the Coulomb force. The baryonic decay also becomes po ssible by virtue of electrical repulsion and we find the condition to supp ress it so that the charged Q-balls can survive in the universe.\n\nhttps: //indico.icrr.u-tokyo.ac.jp/event/23/contributions/832/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/832/ END:VEVENT BEGIN:VEVENT SUMMARY:Radiative Higgs Lepton-Flavor-Violating Decay Mediated by Leptophl ic Dark Matter DTSTART;VALUE=DATE-TIME:20151029T094700Z DTEND;VALUE=DATE-TIME:20151029T100000Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-837@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: zhaofeng kang (KIAS)\nIn the standard model (SM)\, H iggs lepton-flavor-violating (LFV) decay is absent and thus it is a good p robe to new physics. In this article we study a type of new physics that c ould lead to large Higgs LFV decay\, i.e.\, leptophlic dark matter (DM) sp ecified by the particle property of DM (a Majorana fermion) and DM-SM medi ators (scalar leptons). Different than other similar setups\, here we intr oduce both the left-handed and right-handed scalar leptons. They allow for large LFV in Higgs decay and thus may explain the tentative Br$(h\\ra\\ta u\\mu)\\sim1\\%$. In particular\, we find that the stringent bound from $\ \tau\\ra\\mu\\gamma$ can be naturally avoided. Aspects of relic density an d especially radiative direct detection of the leptonic DM are also invest igated.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contributions/837/ LOCATION: URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/837/ END:VEVENT BEGIN:VEVENT SUMMARY:Higgs Portal Dark Matter and GeV Gamma-ray Excess DTSTART;VALUE=DATE-TIME:20151029T085600Z DTEND;VALUE=DATE-TIME:20151029T091300Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-838@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Yong Tang (Korea Institute for Advanced Study)\nThe recent claim that gamma-ray excess exists in FERMI data has triggerred man y interesting discussions. Here we propose several simple higgs-portal dar k matter models for explaining the excess. We also compare various channel s using global fit.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contribu tions/838/ LOCATION: URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/838/ END:VEVENT BEGIN:VEVENT SUMMARY:Galactic Center excess by two Higgs doublet portal scalar dark mat ter DTSTART;VALUE=DATE-TIME:20151029T091300Z DTEND;VALUE=DATE-TIME:20151029T093000Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-846@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Osamu Seto (Hokkai-Gakuen University)\nWe consider a simple extension of the Higgs sector in a Higgs portal dark matter where a real scalar is a candidate for dark matter in the present Universe. This Higgs sector extension allows that its dark matter annihilation suitably explains the observed excess of the gamma-ray flux from the Galactic Cente r. We identify the parameter region of the model that can fit the gamma-ra y excess and satisfy phenomenological constraints\, such as the observed d ark matter relic density and the null results of direct dark matter search experiments.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contributions/ 846/ LOCATION: URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/846/ END:VEVENT BEGIN:VEVENT SUMMARY:New Results from the CRESST Experiment DTSTART;VALUE=DATE-TIME:20151029T062500Z DTEND;VALUE=DATE-TIME:20151029T064200Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-850@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Raimund Strauss (MPI für Physik München)\nThe CRES ST (Cryogenic Rare Event Search with Superconducting Thermometers) experim ent aims at the direct detection of WIMPs. The recent Dark Matter run was operated for 2 years with a total target mass of 5kg. With respect to prev ious measuring campaigns the intrinsic radiopurity of CaWO4 crystals and t he capability to reject recoil events from alpha surface contamination has been significantly improved. We analyzed the data acquired by two CaWO4 d etectors which combine an unprecedented background level with a trigger th reshold as low as 300eV. In this talk\, we present a new detector design a nd the results of a low-threshold analysis which set stringent limits for the spin-independent WIMP-nucleon cross section\, in particular for low-ma ss WIMPs. The status of the currently ongoing preparations towards the nex t phase of CRESST and the strategy beyond will be discussed.\n\nhttps://in dico.icrr.u-tokyo.ac.jp/event/23/contributions/850/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/850/ END:VEVENT BEGIN:VEVENT SUMMARY:Electroweak physics and Dark Matter: colliders vs sky DTSTART;VALUE=DATE-TIME:20151026T083900Z DTEND;VALUE=DATE-TIME:20151026T085600Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-855@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Filippo Sala (IPhT\, CEA/Saclay)\nProbing the therma l WIMP paradigm for Dark Matter is one of the primary goals of the high en ergy physics community. To study the interplay of the LHC with direct and indirect detection experiments\, it is necessary to study benchmark WIMP m odels. I will do so by adding to the Standard Model an electroweak multipl et\, which is arguably the simplest way to realise such a study. Besides t hat\, these DM candidates are also motivated by Supersymmetry\, Minimal Da rk Matter\, and strongly-coupled constructions. I will overview\nthe inter play of several different constraints\, commenting also on the impact of e lectroweak corrections\, in particular at a futuristic 100 TeV pp collider .\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contributions/855/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/855/ END:VEVENT BEGIN:VEVENT SUMMARY:On muon->electron+photon and (g-2)_muon in Non-Sterile Electroweak Scale Right-Handed Neutrino Models DTSTART;VALUE=DATE-TIME:20151026T062500Z DTEND;VALUE=DATE-TIME:20151026T064200Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-856@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Tzu-Chiang Yuan (Institute of Physics\, Academia Sin ica\, Taiwan)\nAn updated analysis on the mu --> e + gamma was performed i n a new class of non-sterile electroweak scale right-handed neutrino model s with a A_4 symmetry in the neutrino sector. This class of models provide an interesting link between charged lepton flavor violating processes to the physics of neutrino sector. Constraints from the current limit and pro jected sensitivity from MEG experiment are studied in details. Finally\, t he anomalous magnetic moment of the muon will be discussed.\n\nhttps://ind ico.icrr.u-tokyo.ac.jp/event/23/contributions/856/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/856/ END:VEVENT BEGIN:VEVENT SUMMARY:Distinguishing WIMP-nucleon interactions with directional dark mat ter experiments DTSTART;VALUE=DATE-TIME:20151027T053400Z DTEND;VALUE=DATE-TIME:20151027T055100Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-857@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Bradley Kavanagh (IPhT - CEA/Saclay)\nThe framework of non-relativistic effective field theory (NREFT) aims to generalise the standard analysis of direct detection experiments\, which is typically fra med in terms of spin-dependent (SD) and spin-independent (SI) interactions . I will show that a number of these more general NREFT operators lead to distinctive new directional signatures\, such as prominent ring-like featu res in the directional recoil rate\, even for relatively low mass WIMPs. I will focus on how well different operators can be distinguished in direct ional and non-directional direct detection experiments. In particular\, I will show that for certain NREFT operators\, directional sensitivity provi des the only method of distinguishing them from the standard SI/SD operato rs\, highlighting the importance of directional detectors in probing the p article physics of dark matter.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event /23/contributions/857/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/857/ END:VEVENT BEGIN:VEVENT SUMMARY:Gamma ray tests of Minimal Dark Matter DTSTART;VALUE=DATE-TIME:20151029T093000Z DTEND;VALUE=DATE-TIME:20151029T094700Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-863@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Paolo Panci (Institut d'Astrophysique de Paris (IAP) )\nWe reconsider the model of Minimal Dark Matter (a fermionic\, hyperchar ge-less quintuplet of the EW interactions) and precisely compute its gamma ray signals. We compare them with a number of gamma-ray probes: the galac tic halo diffuse measurements\, the galactic center line searches and rece nt dwarf galaxies observations. We find that the original minimal model\, whose mass is fixed at 9.4 TeV by the relic abundance requirement\, is par ticularly constrained by the line searches: it is ruled out if the Milky W ay possesses a cuspy profile such as NFW but it is still allowed if it has a cored one. Searches of gamma-ray lines from dwarf spheroidal galaxies a re also particularly relevant\, and ongoing astrophysical progresses have the potential to eventually rule out the model. We also explore a wider ma ss range. Furthermore\, most of our results can be safely extended to the larger class of multi-TeV WIMP DM annihilating into massive gauge bosons.\ n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contributions/863/ LOCATION: URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/863/ END:VEVENT BEGIN:VEVENT SUMMARY:Strong support for a millisecond pulsar origin of the galactic cen ter GeV excess DTSTART;VALUE=DATE-TIME:20151027T073000Z DTEND;VALUE=DATE-TIME:20151027T074700Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-868@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Richard Bartels (University of Amsterdam\, GRAPPA)\n Using gamma-ray data from the Fermi Large Area Telescope\, various groups have identified an excess emission in the inner Galaxy centred around ener gies of a few GeV. This excess resembles remarkably well a signal from dar k matter annihilation. One of the most plausible astrophysical interpretat ions is in terms of the combined emission from an undetected population of dim gamma-ray sources. In particular\, millisecond pulsars are the best c andidates due to their spectral similarity to the excess emission. We sear ch for this hypothetical source population using a novel approach based on a wavelet decomposition of the gamma-ray sky and using the latest pass 8 data. Assuming a spatial distribution compatible with the GeV excess emiss ion\, we find evidence for the existence of such a population of dim sourc es in the inner galaxy at high significance. For plausible values of the l uminosity function\, this component can explain 100% of the observed exces s emission.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contributions/86 8/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/868/ END:VEVENT BEGIN:VEVENT SUMMARY:Gamma-ray emission from the recently discovered dwarf galaxy Retic ulum II DTSTART;VALUE=DATE-TIME:20151027T083800Z DTEND;VALUE=DATE-TIME:20151027T085500Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-870@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Savvas Koushiappas (Brown University)\nI will presen t results on the analysis of gamma-ray emission from the recently discover ed dwarf galaxy Reticulum II. Using Fermi-LAT data and a suite of backgro und models we quantify the probability that the observed gamma-ray emissi on is due to background. Taking into account trials factors\, we find emi ssion p-values in the range between 9.8x10^-5 and 9.7x10^-3 and conclude t hat Reticulum II has the most significant gamma-ray emission from any othe r known dwarf galaxy. I will also discuss the dark matter content of Retic ulum II as derived from kinematic studies of its member stellar population and show that Reticulum II has a dark matter halo similar to other nearby dwarf galaxies. If the gamma ray emission is due to dark matter annihilat ion\, the annihilation cross section is consistent with the s-wave relic a bundance cross section. I will conclude by discussing further tests that a re needed in order to ascertain the likelihood of this emission to be due to a conventional astrophysical interpretation.\n\nhttps://indico.icrr.u-t okyo.ac.jp/event/23/contributions/870/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/870/ END:VEVENT BEGIN:VEVENT SUMMARY:Towards a refined understanding of the Galactic Center excess DTSTART;VALUE=DATE-TIME:20151027T074700Z DTEND;VALUE=DATE-TIME:20151027T080400Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-880@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Mauro Valli (SISSA)\nThere is a striking evidence fo r a roughly spherical-symmetric diffuse gamma-ray signal peaked in the Gal actic Center (GC) region\, extended up to several degrees off the GC. \nHe re we critically review the main points regarding the derivation of this s ignal\, characterized by means of the template-fitting method. In particul ar we focus our attention on the usual Inverse Compton (IC) component adop ted for the background emission\, finding that it does not provide a reali stic description of the complex GC environment. Driven by the evidence of a large gas density in the inner kpc of the Galaxy correlated with an impr essive Supernova rate (2 order of magnitude larger than the Galactic avera ge)\, and therefore with ongoing CR acceleration\, we are able to show tha t no clear evidence of the aforementioned excess comes out when a possibly more realistic diffuse CR source term is taken into account.\n\nhttps://i ndico.icrr.u-tokyo.ac.jp/event/23/contributions/880/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/880/ END:VEVENT BEGIN:VEVENT SUMMARY:Update on scalar singlet dark matter from GAMBIT DTSTART;VALUE=DATE-TIME:20151029T082200Z DTEND;VALUE=DATE-TIME:20151029T083900Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-884@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Christoph Weniger (University of Amsterdam)\nThe arg uably most simple model for WIMP dark matter is a scalar singlet that coup les to the Standard Model sector via the Higgs portal. It is a simple exa mple for beyond-the-Standard Model (BSM) physics\, and can be tested with collider\, direct\, indirect and cosmological probes. In this talk\, I wi ll present the first analysis results for the scalar singlet dark matter m odel that we obtained with GAMBIT (Global And Modular BSM Inference Tool). GAMBIT is a new code that provides an extensive and flexible framework f or global scans. Already now\, it integrates accurate likelihood function s for a number of direct detection (like XENON and LUX) and indirect detec tion (like Fermi LAT and IceCube) experiments. It is easily extensible an d allows a seamless integration of popular existing theory codes like Dark SUSY and MicrOmegas. Besides presenting results that we obtain for scalar singlet dark matter and generic WIMP models\, this talk will provide an o verview over the existing and planned dark matter functionality of GAMBIT. \n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contributions/884/ LOCATION: URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/884/ END:VEVENT BEGIN:VEVENT SUMMARY:Prospects on the indirect dark matter detection and a future spect roscopic survey of dwarf spheroidal galaxies DTSTART;VALUE=DATE-TIME:20151027T082100Z DTEND;VALUE=DATE-TIME:20151027T083800Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-886@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Koji Ichikawa (Kavli IPMU)\nOne of the most promisin g way to detect dark matter is to look for its annihilation or decay produ cts among cosmic-rays. Recently\, more and more interesting results are re ported by measurements of cosmic-rays from various kinds of targets such a s the milky way galaxy\, dwarf spheroidal galaxies\, cluster galaxies\, et c. Among them\, dwarf spheroidal galaxy is one of the nearest\, dark matte r dominated galaxies and therefore one can expect that a large number of d ark matter annihilation/decay signals reach the earth from its halo. In th is presentation\, we will discuss robustness of the gamma-ray search from the dwarf spheroidal galaxies and give prospects of the dark matter halo s urvey by the Prime Focus Spectroscopy (PFS) of SuMIRe project.\n\nhttps:// indico.icrr.u-tokyo.ac.jp/event/23/contributions/886/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/886/ END:VEVENT BEGIN:VEVENT SUMMARY:Low-mass WIMP results and prospects with the EDELWEISS-III experim ent DTSTART;VALUE=DATE-TIME:20151029T051700Z DTEND;VALUE=DATE-TIME:20151029T053400Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-888@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Eric Armengaud (CEA Saclay)\nThe EDELWEISS-III colla boration is operating an experiment for the direct detection of WIMP dark matter in the low radioactivity environment of the Modane Underground Labo ratory. It consists of 36 advanced "FID" germanium detectors operating at 18 mK in a dilution refrigerator in order to identify eventual rare nuclea r recoils induced by elastic scattering of WIMPs from our Galactic halo.\n After a brief discussion on the backgrounds and rejection method with the FID detectors\, a first low-mass WIMP search using data acquired in a long -term campaign will be presented. I will also present the prospects for th ese detectors to explore uncharted parameter space for WIMPs in the GeV - 10 GeV domain.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contributions /888/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/888/ END:VEVENT BEGIN:VEVENT SUMMARY:Update on GAMBIT DTSTART;VALUE=DATE-TIME:20151029T080500Z DTEND;VALUE=DATE-TIME:20151029T082200Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-889@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Pat Scott\, on behalf of the GAMBIT Collaboration (I mperial College London)\nI will give an update on GAMBIT\, the Global And Modular BSM Inference Tool. GAMBIT is a flexible\, modular\, massively pa rallel new framework for carrying out global fits to essentially any BSM t heory. First results from GAMBIT will incorporate direct\, indirect\, sol ar and relic density searches for dark matter\, limits on production of ne w particles from the LHC and LEP\, complete flavour constraints from LHCb\ , LHC Higgs production and decay\, and various electroweak precision obser vables. In many cases\, the likelihoods in GAMBIT are new\, updated or co mputed in significantly more detail than in previous scans. GAMBIT also f eatures interfaces to a range of sampling algorithms\, including different ial evolution and nested sampling\, and the ability to produce both Bayesi an and profile likelihood results.\n\nhttps://indico.icrr.u-tokyo.ac.jp/ev ent/23/contributions/889/ LOCATION: URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/889/ END:VEVENT BEGIN:VEVENT SUMMARY:A New Method for Determining the Local Dark Matter Density DTSTART;VALUE=DATE-TIME:20151027T051700Z DTEND;VALUE=DATE-TIME:20151027T053400Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-891@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Hamish Silverwood (GRAPPA\, University of Amsterdam) \nDetermination of the Dark Matter (DM) density at the solar position is c ritical to direct and indirect dark matter searches. Additionally\, it is important to make this determination with as few assumptions as possible\, as results from direct detection searches are used to explore a wide vari ety of theoretical models\, and hidden astrophysical assumptions could bia s theoretical searches. Here we present a Jeans analysis based method for the determination of the local DM density which allows us to limit the num ber of assumptions we need to make. We fit vertical profiles of baryon and DM density to tracer density and velocity dispersion data via integrated Jeans equations\, and from these derive the local DM density. We present t ests on mock data\, demonstrate the importance of the 'tilt term' which li nks radial and vertical motions\, and also present initial investigations using SDSS and RAVE data.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/co ntributions/891/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/891/ END:VEVENT BEGIN:VEVENT SUMMARY:Test of Self-interacting dark matter and its thermal transport in the Sun DTSTART;VALUE=DATE-TIME:20151027T062500Z DTEND;VALUE=DATE-TIME:20151027T064200Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-895@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Chian-Shu Chen (National Center for Theoretical Scie nces)\nThe halo dark matter (DM) can be gravitationally captured by the Su n. For\nself-interacting DM (SIDM)\, we show that the number of DM trapped inside\nthe Sun remains unsuppressed even if the DM-nucleon cross section is\nnegligible. We consider a SIDM model where *U*(1) gauge symmetry is i ntroduced\nto account for the DM self-interaction. Such a model naturally leads to\nisospin violation for DM-nucleon interaction\, although isospin symmetry is\nstill allowed as a special case. We show that the indirect de tection of\nDM-induced neutrinos from the Sun can probe those SIDM paramet er ranges not\nreachable by direct detections. Those parameter ranges are either the\nregion with a very small *m* or the region opened up due to is ospin\nviolations. The energy flows in and out of the system include the\n gravitational capture via DM-nucleon and DM-DM scatterings\, the energy\nd issipation via DM annihilation\,\nand the heat exchange between DM and sol ar nucleus are studied. The DM\ntemperature can be higher than the core te mperature of the Sun. We further\nexplore its impact on the DM indirect se arch signal.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contributions/8 95/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/895/ END:VEVENT BEGIN:VEVENT SUMMARY:Implications of simulated Milky Way-like haloes for dark matter di rect detection DTSTART;VALUE=DATE-TIME:20151027T050000Z DTEND;VALUE=DATE-TIME:20151027T051700Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-898@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Nassim Bozorgnia (University of Amsterdam)\nThere is significant astrophysical uncertainty in the interpretation of data from dark matter direct detection experiments\, due to the poorly known dark ma tter distribution at the position of the Sun. I will discuss the local dar k matter density and velocity distribution of Milky Way-like galaxies obta ined from the high-resolution EAGLE hydrodynamical simulations. To make re liable predictions for direct detection searches\, we identify simulated h aloes which satisfy the Milky Way observational constraints. Using the dar k matter distribution obtained for the selected Milky Way-like simulated h aloes\, I will present an analysis of current direct detection data.\n\nht tps://indico.icrr.u-tokyo.ac.jp/event/23/contributions/898/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/898/ END:VEVENT BEGIN:VEVENT SUMMARY:A reconstruction scheme for f(T) gravity based on QCD ghost dark e nergy DTSTART;VALUE=DATE-TIME:20151026T060800Z DTEND;VALUE=DATE-TIME:20151026T062500Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-901@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Surajit Chattopadhyay (Pailan College of Management and Technology\, Kolkata)\nAccelerated expansion of our universe\, as evid enced by Supernovae Ia (SNeIa)\, Cosmic Microwave Background (CMB) radiati on anisotropies\, Large Scale Structure (LSS) and X-ray experiments\, is w ell documented in literature. A missing energy component\, also known as D ark Energy (DE) with negative pressure\, is widely considered by scientist s as the responsible of this accelerated expansion. DE model\, so-called V eneziano ghost DE (GDE)\, has been proposed in [1]. The key ingredient of this new model is that the Veneziano ghost\, which is unphysical in the us ual Minkowski spacetime quantum field theory (QFT)\, exhibits important ph ysical effects in dynamical spacetime or spacetime with non-trivial topolo gy. Veneziano ghost is supposed to exist for solving the U(1) problem in t he low-energy effective theory of QCD [2]. The present paper reports a rec onstruction scheme for f(T) gravity based on QCD ghost dark energy. Two mo dels of f(T) have been generated and the pressure and density contribution s due to torsion have been reconstructed. Two realistic models have been o btained and the effective equations of state have been studied. Also\, the squared speed of sound has been studied to examine the stability of the m odels.\n\nReferences:\n[1] F.R. Urban\, A.R. Zhitnitsky\, Phys. Lett. B 68 8\, 9 (2010).\n[2] R.-G. Cai\, Z.-L. Tuo\, H.-B. Zhang\, Q. Su\, Phys. Rev . D 84\, 123501 (2011).\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/cont ributions/901/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/901/ END:VEVENT BEGIN:VEVENT SUMMARY:Dark matter search from DarkSide DTSTART;VALUE=DATE-TIME:20151029T055100Z DTEND;VALUE=DATE-TIME:20151029T060800Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-903@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Masayuki Wada (Princeton University)\nDarkSide-50 (D S-50) at Gran Sasso underground laboratory\, Italy\, is a\ndirect dark mat ter search experiment based on a TPC with liquid argon\nfrom underground s ources. The DS-50 TPC\, with 50 kg of active argon\nand a fiducial mass of ~37 kg\, is installed inside an active neutron\nveto based on a boron-loa ded organic scintillator. The neutron veto is\nbuilt inside a water cheren kov muon veto.\nDS-50 has been taking data since Nov 2013\, collecting 47 days livetime\nof data with atmospheric argon. Also\, recently DS-50 commi ssioned\nliquid Ar from underground and measured the level of radioactive 39Ar.\nThe first physics result from DarkSide as well as underground argon \nperformance will be presented. This is the most sensitive dark matter\ns earch preformed with an argon target.\n\nhttps://indico.icrr.u-tokyo.ac.jp /event/23/contributions/903/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/903/ END:VEVENT BEGIN:VEVENT SUMMARY:The electron plus positron spectrum from annihilation of Kaluza-Kl ein dark matter and comparison with recent measurements DTSTART;VALUE=DATE-TIME:20151029T083900Z DTEND;VALUE=DATE-TIME:20151029T085600Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-905@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Satoshi Tsuchida (Ritsumeikan University)\nOne of th e good candidates for cold dark matter is the lightest Kaluza-Klein partic le (LKP)\,which produce electrons and positrons by pair annihilation in th e Galactic halo. The directions of electrons and positrons are randomized by the Galactic magnetic field\, and the energy is reduced by some energy loss mechanisms\, when the charged particles propagate in the Universe.\n We calculate the observed electron and positron spectra expected from the LKP annihilation taking account of propagation effect\, such as brems strahlung. The spectra include the electron-positron component from two-bo dy decays and ``continuum'' emission\, which is produced by LKP annihilati on via muon pair\, tauon pair\, quark pair\, and gauge bosons. We compare the spectra with recent observational data\, and we can set some constrain ts on the boost factor\, which indicates the dark matter concentration in the Galactic halo. In addition\, we will discuss the recent results of pos itron excess in high energy region based on our calculation.\n\nhttps://in dico.icrr.u-tokyo.ac.jp/event/23/contributions/905/ LOCATION: URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/905/ END:VEVENT BEGIN:VEVENT SUMMARY:Prospect for indirect Dark Matter searches with the Cherenkov Tele scope Array DTSTART;VALUE=DATE-TIME:20151027T092900Z DTEND;VALUE=DATE-TIME:20151027T094600Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-910@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Saverio Lombardi (OAR-INAF\, ASDC)\nThe nature of da rk matter (DM) is an open issue of modern physics. Cosmological considerat ions and observational evidences indicate a behaviour beyond the Standard Model for optimal dark matter particle candidates. The non-baryonic dark m atter is compatible with a gas of cold and weakly interacting massive part icles (WIMPs) expected to have a mass in the range between O(10)GeV and O( 100)TeV. Indirect DM searches with imaging atmospheric Cherenkov telescope s (IACTs) may play a crucial role in constraining the nature of the DM par ticle(s) through the study of their annihilation in very high energy (VHE) gamma rays from promising targets\, such as the Galactic Center (GC) and the dwarf spheroidal galaxies (dSphs) of the Milky Way. In this contributi on\, we focus on indirect DM searches prospects for the next-generation ga mma-ray Cherenkov Telescope Array (CTA) observatory.\n\nhttps://indico.icr r.u-tokyo.ac.jp/event/23/contributions/910/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/910/ END:VEVENT BEGIN:VEVENT SUMMARY:Dark Matter Direct Detection at the Ton Scale with the XENON Exper iment DTSTART;VALUE=DATE-TIME:20151029T064200Z DTEND;VALUE=DATE-TIME:20151029T065900Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-919@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Daniel Coderre (Albert Einstein Center for Fundament al Physics\, University of Bern)\nFor over a decade the XENON Collaboratio n has been a pioneer in the field of dark matter direct detection. The col laboration has achieved world-leading sensitivities in WIMP-nucleon intera ctions using liquid xenon time projection chambers (TPCs)\, first with the XENON10 and later with the XENON100 experiments. This year the next phase \, XENON1T\, will begin data-taking with an unprecedented one ton fiducial (three tons total) volume of ultra pure liquid xenon as both target and d etection medium\, and should reach sensitivities down to 10-47 cm2 after t wo ton years of exposure. The upgrade to the ton scale is only possible du e to a massive research and development program encompassing every aspect of the detector. This program is ongoing and will enable a seamless upgrad e from XENON1T to a true multi-ton detector\, XENONnT\, with the goal of a n order of magnitude increase in sensitivity. XENONnT will reuse the XENON 1T infrastructure but feature a 7 ton active volume. It will be the penult imate iteration leading to the DARWIN experiment\, a 30 ton liquid xenon W IMP detector designed to reach sensitivities down to 10-49 cm2. This talk will discuss the current and future stages of the XENON experiment in the context of the global dark matter search.\n\nhttps://indico.icrr.u-tokyo.a c.jp/event/23/contributions/919/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/919/ END:VEVENT BEGIN:VEVENT SUMMARY:The VERITAS Dark Matter and Astroparticle Program DTSTART;VALUE=DATE-TIME:20151027T091200Z DTEND;VALUE=DATE-TIME:20151027T092900Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-920@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Ben Zitzer (McGill University)\nVERITAS\, an array o f atmospheric Cherenkov telescopes is sensitive to VHE gamma rays in the 8 5 GeV-30 TeV energy range. VERITAS has a wide scientific reach including o bservations of supernova remnants\, pulsars\, pulsar wind nebulae\, active galactic nuclei\, among others. This presentation will focus on recent de velopments of the various astroparticle science topics by members of the V ERITAS collaboration\, including the search for dark matter (DM). The poss ible astrophysical objects considered to be candidates for indirect DM det ection are dwarf spheroidal galaxies (dSphs) of the Local Group and the Ga lactic Center among others. Results of a combined search for DM of four dS phs will be reported along with a spectrum cosmic-ray electrons\, constrai nts on the inter-galactic magnetic field and other astroparticle physics t opics.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contributions/920/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/920/ END:VEVENT BEGIN:VEVENT SUMMARY:Complementarity of direct detection and collider searches for Higg s portal DM DTSTART;VALUE=DATE-TIME:20151026T085600Z DTEND;VALUE=DATE-TIME:20151026T091300Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-923@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Pyugwon KO (KIAS)\nIn this talk\, I will describe co mplementarity of direct detection and collider searches for Higgs portal D M models\, and show that it is essential to work in renormalizable and gau ge invariant DM models for collider searches (both the invisible Higgs dec ay and the monojet (or dijet) + missing ET). In particular we derive the b ounds on new physics scale within a UV model\, and show that it is complet ely different from those presented by ATLAS and CMS Collaborations based o n simple mediator models.\n\nRefs: \n(1) arXiv:1405.3530 (Phys.Rev. D90 (2 014) 5\, 055014)\n(2) arXiv:1506.06556\, and works in preparation\n\nhttps ://indico.icrr.u-tokyo.ac.jp/event/23/contributions/923/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/923/ END:VEVENT BEGIN:VEVENT SUMMARY:Dark matter density profiles in dwarf satellites DTSTART;VALUE=DATE-TIME:20151027T080400Z DTEND;VALUE=DATE-TIME:20151027T082100Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-924@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Piero Ullio (SISSA)\nDwarf spheroidal satellites of the Milky Way are a prime target for dark matter indirect searches. E.g.\, upper limits on gamma-ray fluxes in their directions\, obtained with the Fermi Large Area Telescope\, have been recently used to update constraints on weakly interacting massive particles (WIMPs)\, excluding pair annihila ting cross sections at the level of WIMP thermal relic cross sections for WIMP masses lighter than about 100 GeV. The mapping of a limit on the flux onto a limit on particle dark matter properties stems from the knowledge one has regarding the distribution of dark matter in each dwarf. Such dark matter density profiles are usually derived assuming that dwarfs are equi librium\, pressure-supported\, spherical systems\, and implementing the sp herical Jeans equation to link mass profiles to stellar velocity dispersio ns. This link requires assumptions regarding quantities like the stellar a nisotropy profiles\, which are not measurable and are usually treated as n uisance parameters over which to marginalize. We propose here a novel appr oach to infer the dark matter mass profiles\, based on the analytical inve rsion of the spherical Jeans equation. This methods allows us revisit the so-called mass-anisotropy degeneracy problem\, and more direct assessment s of the uncertainties on line-of-sight integrals of dark matter halo dens ity profiles. Implications for dark matter indirect detection limits are discussed.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contributions/924 / LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/924/ END:VEVENT BEGIN:VEVENT SUMMARY:Modelling the flux distribution function of the extragalactic gamm a-ray background from dark matter annihilation DTSTART;VALUE=DATE-TIME:20151027T085500Z DTEND;VALUE=DATE-TIME:20151027T091200Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-930@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Michael Feyereisen (University of Amsterdam)\nThe on e-point function (i.e.\, the isotropic flux distribution) is a complementa ry method to (anisotropic) two-point correlations in searches for a gamma- ray dark matter annihilation signature. Using analytical models of structu re formation and dark matter halo properties\, we compute the gamma-ray fl ux distribution due to annihilations in extragalactic dark matter halos\, as it would be observed by the Fermi Large Area Telescope. Combining the c entral limit theorem and Monte Carlo sampling\, we show that the flux dist ribution takes the form of a narrow Gaussian of ‘diffuse’ light\, with an ‘unresolved point source’ power-law tail as a result of bright hal os. We argue that this background due to dark matter constitutes an irredu cible and significant background component for point-source annihilation s earches with galaxy clusters and dwarf spheroidal galaxies\, modifying the predicted signal-to-noise ratio. A study of astrophysical backgrounds to this signal reveals that the shape of the total gamma-ray flux distributio n is very sensitive to the contribution of a dark matter component\, allow ing us to forecast promising one-point upper limits on the annihilation cr oss section. We show that by using the flux distribution at only one energ y bin\, one can probe the canonical cross section required for explaining the relic density\, for dark matter of masses around tens of GeV.\n\nhttps ://indico.icrr.u-tokyo.ac.jp/event/23/contributions/930/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/930/ END:VEVENT BEGIN:VEVENT SUMMARY:Prospects for dark matter discovery with inelastic transitions of xenon DTSTART;VALUE=DATE-TIME:20151027T055100Z DTEND;VALUE=DATE-TIME:20151027T060800Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-940@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Christopher McCabe (University of Amsterdam)\nDark m atter can excite the xenon isotopes 129Xe and 131Xe through a spin depende nt interaction. The excited isotopes quickly decay giving a 40 keV and 80 keV photon\, respectively. This signal is very distinct from the usual sig nal from elastically scattering dark matter and\, if discovered\, would pr ovide clear evidence against the usual spin independent interaction. I dis cuss the prospects of discovering this inelastic signal with up-coming ton ne-scale two-phase xenon direct detection experiments.\n\nhttps://indico.i crr.u-tokyo.ac.jp/event/23/contributions/940/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/940/ END:VEVENT BEGIN:VEVENT SUMMARY:New physics searches at the LHC: Where do we go with run II DTSTART;VALUE=DATE-TIME:20151026T073000Z DTEND;VALUE=DATE-TIME:20151026T080500Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-943@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Osamu Jinnouchi (TokyoTech)\nTwo LHC experiments\, A TLAS and CMS restarted their operations so called\nRun-2 from June this ye ar. The center of mass energy is increased to 13 TeV\,\nwith which the sig nificant enhancement in sensitivity is anticipated for\nthe new physics. T he talk will briefly review the Run-1 results and will discuss\nthe prospe cts for the Run-2. The status and the early results from the Run-2\nwill b e also shown.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contributions/ 943/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/943/ END:VEVENT BEGIN:VEVENT SUMMARY:Dark matter search using fiducial volume analysis in XMASS experim ent DTSTART;VALUE=DATE-TIME:20151029T060800Z DTEND;VALUE=DATE-TIME:20151029T062500Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-946@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Hiroshi Ogawa (ICRR\, The Univ. of Tokyo)\nAn 800kg liquid xenon detector (XMASS) was constructed at Kamioka Observatory\, Jap an in 2010. XMASS can be made the low background region in center of dete ctor by shield of the liquid xenon which eliminates the background in dete ctor surface. A commissioning run was conducted from November 2010 to Ju ne 2012. We found the unexpected background in detector surface. In order to reduce these backgrounds on detector surface and increase the sensitivi ty for Dark Mater search\, refurbishment of the detector was completed and physics data taking was resumed since Nov 2013. In this presentation\, th e result of dark matter search using fiducial volume analysis is reported. Also expected background events should be evaluated.\n\nhttps://indico.ic rr.u-tokyo.ac.jp/event/23/contributions/946/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/946/ END:VEVENT BEGIN:VEVENT SUMMARY:The Extragalactic Radio Background from Dark Matter Annihilation a nd the ARCADE-2 Excess DTSTART;VALUE=DATE-TIME:20151027T064200Z DTEND;VALUE=DATE-TIME:20151027T065900Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-948@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Ke Fang (University of Chicago)\nObservations of the ARCADE-2 and other telescopes have reported a significant isotropic emiss ion spanning from 22 MHz to 10 GHz. The intensity of this signal significa ntly exceeds the expected contribution from known astrophysical sources\, and the distribution of the signal is suggested to be unusually smooth com pared to emission which traces large scale structure. In this talk\, we in vestigate the extragalactic radio background from dark matter annihilation and its possible connection to the ARCADE-2 excess signal. We show that w ith assumptions of strong magnetic fields and extended substructure in mas sive clusters\, dark matter models can explain both intensity and spectrum of the ARCADE-2 excess\, while produce small anisotropies that remain con sistent with observational constraints. We also demonstrate that the above constraints could be significantly relaxed in an alternative scenario whe re electrons from the annihilation could be re-accelerated by turbulence i n the intra-cluster medium.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/ contributions/948/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/948/ END:VEVENT BEGIN:VEVENT SUMMARY:Scalar dark matter with colored partner DTSTART;VALUE=DATE-TIME:20151026T080500Z DTEND;VALUE=DATE-TIME:20151026T082200Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-949@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Laura Lopez Honorez (Vrije Universiteit Brussel)\nIn my talk I will review the case of scalar dark matter model in which case the dark matter candidate couples to the Standard Model (SM) fermions thro ugh Yukawa interactions involving a new vector-like fermion. The latter mo dels are already know to give rise to particularly interesting gamma ray s ignals when the Yukawa coupling is restricted to leptons. In my talk\, I w ill present our latest results associated to a similar Yukawa interactions to SM quarks including constraints and prospects for Direct detection\, c olliders\, and indirect dark matter searches.\n\nhttps://indico.icrr.u-tok yo.ac.jp/event/23/contributions/949/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/949/ END:VEVENT BEGIN:VEVENT SUMMARY:The PandaX Dark Matter Experiment DTSTART;VALUE=DATE-TIME:20151029T053400Z DTEND;VALUE=DATE-TIME:20151029T055100Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-952@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Xun Chen (Shanghai Jiao Tong University)\nPandaX is a dark matter direct detection experiment with xenon located in the China Jinping Laboratory. The collaboration was established in 2009. It's first stage\, PandaX-I\, started to take data in May\, 2014 and stopped running in the end of Oct\, 2014. Its first dark matter searching results based on 17.4 live days of data was released in Aug 2014\,and disfavor all previou sly claimed possible dark matter signals by other experiments. The final d ata analysis results of PandaX-I based on 80.1 live days of data were rele ased in this May with many updates in analysis methods\, and verified Pand aX-I first results.The second stage\, PandaX-II\, is being tested and will start operation in this year. The detector will contain 500kg of xenon an d we hope it will set the most stringent limit for dark matter after one y ear of running.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contribution s/952/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/952/ END:VEVENT BEGIN:VEVENT SUMMARY:The CR-WIMP connection in the Galaxy DTSTART;VALUE=DATE-TIME:20151029T073000Z DTEND;VALUE=DATE-TIME:20151029T080500Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-960@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Carmelo Evoli (GSSI\, L'Aquila)\nWhether or not an e xotic component\, as the fugitive Dark Matter\, contributes to the observe d high-energy CR fluxes\, is one of the most important open problem in Cos mology. Charged CRs play a key role in this context\, since Weakly Interac ting Massive Particle annihilations or decays can be a copious source of a ntimatter in our Galaxy\, and the local CR fluxes from conventional astrop hysical sources can be predicted with fair accuracy. \nIn this talk\, I wi ll show the implications of adopting realistic models for the propagation of CRs in the Galaxy and in the Heliosphere on our ability to provide accu rate background predictions. In particular\, I will focus on the antiproto n channel since the recent measurements by AMS-02 can be profitably used t o search for DM contributions or to constrain the DM annihilation cross se ction in the Galactic halo. Remarkably\, this channel has been recently u sed to argue the DM interpretation of the gamma-ray excess observed from t he Galactic Center.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contribu tions/960/ LOCATION: URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/960/ END:VEVENT BEGIN:VEVENT SUMMARY:Asymmetric dark matter and an antineutrino signal DTSTART;VALUE=DATE-TIME:20151026T051700Z DTEND;VALUE=DATE-TIME:20151026T053400Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-963@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Hajime Fukuda (Kavli IPMU)\nUnder rather generic ass umptions\, we show that in the asymmetric dark matter (ADM) scenario\, the sign of the B-L asymmetry stored in the dark matter sector and the standa rd model sector are always the same. One particularly striking consequence of this result is that\, when the dark matter decays or annihilates in th e present universe\, the resulting final state always involves an anti-neu trino. As a concrete example of this\, we construct a composite ADM model and explore the feasibility of detecting such an anti-neutrino signal in a tmospheric neutrino detectors.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/ 23/contributions/963/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/963/ END:VEVENT BEGIN:VEVENT SUMMARY:Searching for Singlet Majorana dark matter. DTSTART;VALUE=DATE-TIME:20151026T082200Z DTEND;VALUE=DATE-TIME:20151026T083900Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-968@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: YUE-LIN SMING TSAI (Kavli IPMU)\nWe are searching th e Singlet Majorana dark matter (DM) by using constraints from relic densit y\, colliders (LHC and LEP)\, DM direct detection\, and DM indirect detect ion. By the means of effective field theory (EFT)\, we write down several kinds of higher dimensional operators and show the allowed parameter space by current experiments in DM mass and cut-off scale plane. Furthermore\, we also try to explore the parameter space where EFT is invalid. We propos e a method to fix this problem by connecting the EFT with several simplifi ed models\, which allows us to make a robust prediction on DM collider sig nals.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contributions/968/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/968/ END:VEVENT BEGIN:VEVENT SUMMARY:Dark Matter Sensitivity of CALET DTSTART;VALUE=DATE-TIME:20151027T060800Z DTEND;VALUE=DATE-TIME:20151027T062500Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-975@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Holger Motz (ICSEP Waseda University)\nCALET (Calori metric Electron Telescope)\, launched to the ISS in August\, directly meas ures the electron+positron cosmic rays flux up to 20 TeV.\nWith its proton rejection capability of 1 : 10^5 and an aperture of 1200 cm^2 sr\, it wil l provide good statistics even well above one TeV\, while also featuring a n energy resolution of 2%\, which allows it to detect fine structures in t he spectrum. Such structures may originate from Dark Matter annihilation o r decay\, making indirect Dark Matter search one of CALET's main science o bjectives among others\, such as identification of signatures from nearby supernova remnants by observation of TeV electrons\, and measurement of th e heavy nuclei spectra to study the cosmic ray acceleration and diffusion mechanism.\nThe positron excess in cosmic rays above 10 GeV was initially proposed by the AMS-02 collaboration to originate from an extra power law source with exponential cut-off\, which emits an equal amount of electrons and positrons. The latest results from AMS-02 on positron fraction and to tal electron+positron flux can be fitted with a parametrization including such an extra power law source\, which in general may represent nearby ast rophysical accelerators or annihilation/decay of Dark Matter. Assuming tha t the source is a single pulsar\, this scenario is extrapolated into the T eV-region and the expected CALET data for this case simulated. Based on th is prediction and taking the shape of the Dark Matter annihilation spectru m into account\, the sensitivity of CALET to an additional component from Dark Matter annihilation in the galactic halo has been calculated.\nIt is shown that CALET could significantly improve these limits compared to curr ent data\, especially for those Dark Matter candidates that feature a larg e fraction of annihilation directly into electron+positron\, such as the L KP (Lightest Kaluza-Klein particle).\nThe alternative case of Dark Matter annihilation or decay being the primary cause of the positron excess and t he prospects of CALET detecting the corresponding Dark Matter signature ar e discussed as well.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contrib utions/975/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/975/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for Event Rate Modulation in XENON100 Electronic Recoil Dat a DTSTART;VALUE=DATE-TIME:20151029T050000Z DTEND;VALUE=DATE-TIME:20151029T051700Z DTSTAMP;VALUE=DATE-TIME:20260412T055935Z UID:indico-contribution-233-976@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Fei Gao (Shanghai Jiao Tong University)\nXENON100 is currently one of the world leading dark matter direct detection experimen ts using a dual phase Xenon time projection chamber (TPC). The XENON100 ex periment has accumulated more than one year of dark matter search data sin ce February 2011 at a background level of 5.3 events/(keV*tonne*day). This data allows to test the interpretation of the long standing DAMA/LIBRA an nual modulation observations for certain dark matter models producing elec tronic recoils. In this talk\, we present the new analysis results searchi ng for event rate modulations in the XENON100 electronic recoil data. We d emonstrate for the first time that long term stability of dual phase Xenon TPC is sufficient to enable searches for modulation signals in the low en ergy region. We finally present the search results from un-binned profile likelihood analysis and make comparison with the DAMA/LIBRA annual modula tion observation.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contributi ons/976/ LOCATION: Room 2 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/976/ END:VEVENT END:VCALENDAR