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SUMMARY:Probing heavy dark matter decays with multi-messenger astrophysica
 l data
DTSTART;VALUE=DATE-TIME:20191112T031200Z
DTEND;VALUE=DATE-TIME:20191112T031300Z
DTSTAMP;VALUE=DATE-TIME:20250110T182820Z
UID:indico-contribution-1560@indico.icrr.u-tokyo.ac.jp
DESCRIPTION:Speakers: Oscar Macias ()\nWe set conservative constraints on 
 decaying dark matter particles with masses spanning a very wide range ($10
 ^4-10^{16}$ GeV). For this we use multimessenger observations of cosmic-ra
 y (CR) protons/antiprotons\, electrons/positrons\, neutrinos/antineutrinos
  and gamma rays. Focusing on decays into the $b\\bar{b}$ channel\, we simu
 late the spectra of dark matter yields by using the Dokshitzer-Gribov-Lipa
 tov-Altarelli-Parisi equations and the Pythia package. We then propagate t
 he CRs of dark matter origin till Earth by using the state-of-the-art nume
 rical frameworks CRPropa\, GALPROP and HelMod for the solution of the CR t
 ransport equation in the extragalactic\, Galactic region and the heliosphe
 re\, respectively. Conservative limits are obtained by requiring that the 
 predicted dark matter spectra at Earth be less than the observed CR spectr
 a. Overall\, we exclude dark matter lifetimes of $10^{28}$ s or shorter fo
 r all the masses investigated in this work. The most stringent constraints
  reach $10^{30}$ s for very heavy dark matter particles with masses in the
  range $10^{11}−10^{14}$ GeV.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event
 /259/contributions/1560/
LOCATION:The University of Tokyo\, Kashiwa Campus
URL:https://indico.icrr.u-tokyo.ac.jp/event/259/contributions/1560/
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