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SUMMARY:Dark-matter relay for ultra-high-energy cosmic rays
DTSTART;VALUE=DATE-TIME:20261030T101500Z
DTEND;VALUE=DATE-TIME:20261030T103000Z
DTSTAMP;VALUE=DATE-TIME:20261019T011059Z
UID:indico-contribution-6213@cern.ch
DESCRIPTION:Speakers: Mikhail Sekretov (INR\, MSU)\nAstrophysical sources 
 of ultra-high-energy cosmic rays (UHECRs) remain unidentified\, and no nea
 rby cosmic accelerators are established even for the highest-energy events
 . In addition\, puzzling correlations of a fraction of UHECR flux with dis
 tant blazars were found by HiRes and\, recently\, Telescope Array experime
 nts. Here we propose that dark matter can provide a mechanism to effective
 ly transfer UHECRs from distant sources: dark-matter particles are boosted
  by UHECRs near the source and pass their momentum to baryons close to the
  observer. The probability of this relay is not negligible because of the 
 growth of dark-matter–baryon cross section with energy. We demonstrate t
 hat the effect is observable for the fermionic dark matter of the mass $m_
 \\mathrm{DM} \\sim 25 \\\, \\mathrm{MeV}$ and discuss possible observation
 al signatures of this mechanism.\n\nhttps://indico.particle.mephi.ru/event
 /626/contributions/6213/
LOCATION:Sevastopol Hotel
URL:https://indico.particle.mephi.ru/event/626/contributions/6213/
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