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BEGIN:VEVENT
SUMMARY:Improved search for Dark Matter annihilation with a combined ana
 lysis of data from Fermi-LAT\, HAWC\, H.E.S.S.\, MAGIC and VERITAS: a fr
 amework for future DM analyses
DTSTART;VALUE=DATE-TIME:20191113T063000Z
DTEND;VALUE=DATE-TIME:20191113T065000Z
DTSTAMP;VALUE=DATE-TIME:20250110T182632Z
UID:indico-contribution-337-1550@indico.icrr.u-tokyo.ac.jp
DESCRIPTION:Speakers: Daniel Kerszberg (IFAE-BIST)\nThe next generation of
  gamma-ray experiments are expected to improve significantly the current r
 esults in the search for Dark Matter (DM). Before these next-generation in
 struments start operating at their nominal design\, one possibility to imp
 rove the current results is to combine data from existing experiments. Thi
 s technique allows to increase energy coverage  by combining data from ins
 truments with better sensitivity in different energy ranges and also to ma
 ximize the sensitivity by combining individual data sets from all the expe
 riments for which the energy ranges overlap. We will report on such an ini
 tiative aiming at combining data from dwarf spheroidal galaxies (dSphs) 
 from the Fermi-LAT\, HAWC\, H.E.S.S.\, MAGIC\, and VERITAS experiments. Be
 ing among the most DM dominated objects with negligible expected astrophys
 ical gamma-ray emission\, dSphs are ideal targets for DM indirect searches
  and thus will be also primary targets for the next generation of experime
 nts. Preliminary results of the combination constraining the DM annihi
 lation cross section will be presented spanning a range of DM masses f
 rom 10 GeV to 100 TeV. The potential of extending this analysis framework 
 to more experiments as well as to future experiments will also be discusse
 d.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/259/contributions/1550/
LOCATION:The University of Tokyo\, Kashiwa Campus
URL:https://indico.icrr.u-tokyo.ac.jp/event/259/contributions/1550/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Status and Prospect of PandaX experiment
DTSTART;VALUE=DATE-TIME:20191112T070500Z
DTEND;VALUE=DATE-TIME:20191112T072500Z
DTSTAMP;VALUE=DATE-TIME:20250110T182632Z
UID:indico-contribution-337-1552@indico.icrr.u-tokyo.ac.jp
DESCRIPTION:Speakers: Pengwei Xie (Tsung-Dao Lee Institute)\nPandaX is a d
 ark matter search experiment located at China Jin Ping Underground Lab usi
 ng xenon time projection chamber.\nIn this talk\, I will present the lates
 t result from PandaX-II experiment and the current status of PandaX-4T exp
 eriment.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/259/contributions/1552
 /
LOCATION:The University of Tokyo\, Kashiwa Campus
URL:https://indico.icrr.u-tokyo.ac.jp/event/259/contributions/1552/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dark Matter Heating vs. Rotochemical Heating in Old Neutron Stars
DTSTART;VALUE=DATE-TIME:20191112T082000Z
DTEND;VALUE=DATE-TIME:20191112T084000Z
DTSTAMP;VALUE=DATE-TIME:20250110T182632Z
UID:indico-contribution-337-1551@indico.icrr.u-tokyo.ac.jp
DESCRIPTION:Speakers: Keisuke Yanagi (University of Tokyo)\nWIMP DMs in th
 e Universe accumulate in neutron stars (NSs) through their interactions wi
 th nucleons. It has been known that their annihilation inside the NS core 
 causes late-time heating\, with which the surface temperature becomes $T_s
  \\simeq (2-3) \\times 10^3$ K for the NS age $t > 10^{6-7}$ years. Thus t
 he measurement of NS surface temperature can be used as a new probe of WIM
 P DMs. Because of the strong gravity of NSs\, DM heating has several advan
 tages compared to the direct detection experiments on the earth.\n\nDespit
 e such advantages\, the background on the DM heating is rarely discussed i
 n the particle physics community. In particular\, the rotochemical heating
 \, internal heating caused by the out-of-equilibrium beta reactions in a N
 S\, should be considered because it does not assume any exotic physics. In
  fact\, if the rotochemical heating operates in a NS\, it may conceal the 
 DM heating effects.\n\nIn this work\, we reevaluate the significance of th
 e DM heating in NSs\, including the effect of the rotochemical heating. We
  show that the signature of DM heating can still be detected in old ordina
 ry pulsars\, and discuss what is necessary to confirm the evidence for the
  DM heating.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/259/contributions/
 1551/
LOCATION:The University of Tokyo\, Kashiwa Campus
URL:https://indico.icrr.u-tokyo.ac.jp/event/259/contributions/1551/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Search for dark matter TeV spectral lines around the Galactic Cent
 re with the MAGIC telescopes
DTSTART;VALUE=DATE-TIME:20191113T065000Z
DTEND;VALUE=DATE-TIME:20191113T071000Z
DTSTAMP;VALUE=DATE-TIME:20250110T182632Z
UID:indico-contribution-337-1555@indico.icrr.u-tokyo.ac.jp
DESCRIPTION:Speakers: Tomohiro Inada (ICRR\, UTokyo)\nIn this talk\, we wi
 ll present a status report on the search for dark matter spectral lines ar
 ound the Galactic centre (GC) with the MAGIC telescope system located on t
 he Canary island of La Palma\, Spain. MAGIC is sensitive to gamma rays fro
 m 50 GeV to 50 TeV. So far\, MAGIC has produced groundbreaking results in 
 the field of indirect DM searches observing a variety of targets\, such as
  the Galactic halo\, dwarf spheroidal galaxies and clusters of galaxies. W
 e are now aiming to add the GC region as an observational target to search
  for line signatures from DM annihilation. MAGIC has observed the GC regio
 n for hundreds of hours at high zenith angles\, at which the collection ar
 ea for TeV gamma rays is significantly increased. This allows us to probe 
 promising SUSY models of heavy DM candidates\, and to set limits on the DM
  annihilation cross section competitive to those obtained from observation
 s in the Southern hemisphere. We will also discuss how we exploit the data
  from a complex sky region to analise for line-like gamma-ray signatures.\
 n\nhttps://indico.icrr.u-tokyo.ac.jp/event/259/contributions/1555/
LOCATION:The University of Tokyo\, Kashiwa Campus
URL:https://indico.icrr.u-tokyo.ac.jp/event/259/contributions/1555/
END:VEVENT
BEGIN:VEVENT
SUMMARY:N-body self-consistent stars-halo modelling of the Fornax dwarf ga
 laxy
DTSTART;VALUE=DATE-TIME:20191112T072500Z
DTEND;VALUE=DATE-TIME:20191112T074500Z
DTSTAMP;VALUE=DATE-TIME:20250110T182632Z
UID:indico-contribution-337-1557@indico.icrr.u-tokyo.ac.jp
DESCRIPTION:Speakers: Galina Shchelkanova (NRC "Kurchatov institute" - ITE
 P)\nWe present nearly self-consistent stellar-halo models of the dwarf sph
 eroidal Fornax galaxy the satellite of the Milky Way galaxy. Such galaxies
  are dark matter dominated objects with almost no gas in them so they are 
 excellent objects for N-body modelling that takes into account visible and
  dark matter(DM) halo components. Three models are self-consistent realiza
 tions containing a truncated King or Plummer models bulge (it stands for t
 he stellar component of the galaxy) and the lowered Evans dark halo model.
  These components are given by the distribution functions which are the fu
 nctions of $E$ and $L_z$ only. And four models with the King and Plummer v
 isible components are made by the AGAMA code based on the calculation of o
 rbits. To guess the parameters which make the N-body models close to the v
 isible object we use hydrodynamic stellar-dark model of the Fornax galaxy 
 taking into account the velocity anisotropy parameter. The AGAMA models sh
 ow better agreement of the resulting velocity dispersion profiles with the
  observed data. We also traced the evolution of all these models and found
  them rather stable during several typical dynamical times.\n\nhttps://ind
 ico.icrr.u-tokyo.ac.jp/event/259/contributions/1557/
LOCATION:The University of Tokyo\, Kashiwa Campus
URL:https://indico.icrr.u-tokyo.ac.jp/event/259/contributions/1557/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SMILE project: all-sky MeV gamma-ray observation and dark matter s
 urvey
DTSTART;VALUE=DATE-TIME:20191112T080000Z
DTEND;VALUE=DATE-TIME:20191112T082000Z
DTSTAMP;VALUE=DATE-TIME:20250110T182632Z
UID:indico-contribution-337-1554@indico.icrr.u-tokyo.ac.jp
DESCRIPTION:Speakers: Yuta Nakamura (Kyoto University)\nIn the MeV gamma-r
 ay band\, the observed Galactic diffuse gamma-rays has the excessive compo
 nent cannot be explained by the current standard model of the Galaxy. This
  excess might be gamma-rays due to annihilation of MeV scale WIMP dark mat
 ter or evaporations of primordial black holes. The MeV band has the advant
 age over the GeV band because there is less diffuse gamma-ray background d
 ue to no $\\pi ^0$ bump.\nIn 2018 April 7\, we carried out the campaign\, 
 sub-MeV and MeV gamma-ray imaging loaded-on balloon experiment 2+ (SMILE-2
 +)\, in order to demonstrate the imaging performance of the gaseous electr
 on tracking Compton camera (ETCC). Unlike conventional Compton cameras suc
 h as COMPTEL\, ETCC uniquely reconstructs the directions of gamma-rays and
  realizes the noiseless gamma-ray observation even in the space environmen
 t by the particle identification and Compton kinematical test. This detect
 or has the energy range from $200\\\,\\mathrm{keV}$ to $5\\\,\\mathrm{MeV}
 $  and the wide field of view ($3\\\,\\mathrm{str}$). We observed the Gala
 ctic center for 8 hours and detect it with the significances of $5\\\,\\si
 gma$ ($511\\\,\\mathrm{keV}$) and $10\\\,\\sigma$ (continuum). The sensiti
 vity of the satellite with ETCC will reach $1\\\,\\mathrm{mCrab}$ ($10^6\\
 \,\\mathrm{sec}$\, $3\\\,\\sigma$) and the HPR of its PSF will be $5\\\,\\
 mathrm{degree}$.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/259/contributi
 ons/1554/
LOCATION:The University of Tokyo\, Kashiwa Campus
URL:https://indico.icrr.u-tokyo.ac.jp/event/259/contributions/1554/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Constraining Secluded Dark Matter Scenarios with HAWC
DTSTART;VALUE=DATE-TIME:20191113T071000Z
DTEND;VALUE=DATE-TIME:20191113T073000Z
DTSTAMP;VALUE=DATE-TIME:20250110T182632Z
UID:indico-contribution-337-1558@indico.icrr.u-tokyo.ac.jp
DESCRIPTION:Speakers: Sergio Hernandez Cadena (Instituto de Física\, UNAM
 )\nIt is possible that DM particles are secluded to their own dark sector\
 , where the interactions are carried by one or several dark mediators. If 
 this dark sector exists\, DM particles do not couple directly to the stand
 ard model (SM) particles\, as in the case of WIMP scenarios. However\, ind
 irect DM searches are still possible if we assume that dark mediators are 
 coupled to SM particles through a kinetic mixing parameter. The HAWC Obser
 vatory is a wide-field-of-view gamma-ray experiment with a high duty cycle
  (>95%) and looking for gamma rays with energies between 1 and 100 TeV. So
 \,  for secluded DM candidates in the TeV range\, the HAWC Observatory is 
 able to explore and constrain the parameter space of dark sector scenarios
  by searching for gamma-ray signals of dark mediator decays in nearby astr
 ophysical targets. Here\, we present preliminary results of these indirect
  searches using HAWC data.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/259/
 contributions/1558/
LOCATION:The University of Tokyo\, Kashiwa Campus
URL:https://indico.icrr.u-tokyo.ac.jp/event/259/contributions/1558/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Rapid bound-state formation of Dark Matter in the Early Universe
DTSTART;VALUE=DATE-TIME:20191112T064500Z
DTEND;VALUE=DATE-TIME:20191112T070500Z
DTSTAMP;VALUE=DATE-TIME:20250110T182632Z
UID:indico-contribution-337-1553@indico.icrr.u-tokyo.ac.jp
DESCRIPTION:Speakers: Tobias Binder ()\nThe thermal decoupling description
  of multi-TeV scale dark matter (DM) and co-annihilating partners is recon
 sidered. In such a high-mass region\, even the electroweak force carriers 
 could act as long-range forces\, leading to the existence of meta-stable D
 M bound states. The formation and subsequent decay of the latter further d
 epletes the relic density on top of the Sommerfeld enhancement\, allowing 
 for heavier DM masses. So far\, only the on-shell mediator emission (W\, Z
 \, H\, g\, photon or exotic) was considered as the formation process of th
 e bound states. In this talk\, I show that bound-state formation via bath 
 particle scattering\, i.e. the mediator instead in the t-channel and conne
 cted to the SM plasma\, can be the dominant conversion process. For a simp
 lified setup we find that bound-state formation via bath particle scatteri
 ng exceeds the single mediator bound-state formation cross-section by seve
 ral orders of magnitude at the freeze-out temperature. The implications of
  these findings are that bound-state effects become more pronounced during
  chemical decoupling and consequently DM could be heavier than previously 
 expected\, eventually informing indirect and collider searches.\n\nhttps:/
 /indico.icrr.u-tokyo.ac.jp/event/259/contributions/1553/
LOCATION:The University of Tokyo\, Kashiwa Campus
URL:https://indico.icrr.u-tokyo.ac.jp/event/259/contributions/1553/
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