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SUMMARY:Topical Seminar: From coannihilation to conversion-driven freeze-o
 ut: Dark matter genesis beyond the WIMP paradigm
DTSTART;VALUE=DATE-TIME:20230907T100000Z
DTEND;VALUE=DATE-TIME:20230907T110000Z
DTSTAMP;VALUE=DATE-TIME:20260420T112052Z
UID:indico-event-7180@indico.ific.uv.es
DESCRIPTION:The nature of dark matter poses one of the most pressing quest
 ions in fundamental physics today. Thermal freeze-out of a weakly interact
 ing massive particle (WIMP) has proved to be a successful framework for ex
 plaining the measured dark matter abundance in the Universe. However\, the
  sizeable couplings of dark matter to the standard model particles require
 d in its simplest realizations have been put under severe pressure by expe
 rimental null-results at colliders\, direct and indirect detection experim
 ents. Hence\, fulfilling the relic density constraint often requires the e
 xploration of ‘exceptional’ regions\, e.g.\, the region where coannihi
 lation effects increase the effective annihilation rate. In this talk\, we
  revisit the assumptions commonly made within the coannihilation scenario 
 and discuss a new variant of dark matter freeze-out\, dubbed conversion-dr
 iven freeze-out (or coscattering). In this scenario\, the relic abundance 
 is set by the freeze-out of conversion processes requiring significantly s
 maller couplings of dark matter to the standard model. While this paramete
 r region is largely immune to conventional WIMP searches\, it predicts the
  signature of long-lived particles at colliders\, making it a prime target
  for upcoming LHC searches. Conversion-driven freeze-out also provides an 
 interesting link to neutrino physics. Considering sterile neutrino dark ma
 tter\, we discuss its implications for the active neutrino masses and Yuka
 wa couplings.\n\nhttps://indico.ific.uv.es/event/7180/
LOCATION:Universe 1001-Primera-1-1-1 - Paterna. Seminario
URL:https://indico.ific.uv.es/event/7180/
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