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SUMMARY:Topical Seminar: Dark Matter Capture in Supernovae Can Modify Dark
  Photon Cooling Bounds
DTSTART;VALUE=DATE-TIME:20260507T100000Z
DTEND;VALUE=DATE-TIME:20260507T113000Z
DTSTAMP;VALUE=DATE-TIME:20260429T143504Z
UID:indico-event-8558@indico.ific.uv.es
DESCRIPTION:Core-collapse supernovae serve as powerful probes of light\, w
 eakly coupled particles\, such as dark photons. The conventional SN1987A c
 ooling bound constrains the dark photon mass-mixing parameter space by req
 uiring that the luminosity from the proto-neutron star core not exceed the
  observed neutrino emission. In this work\, we revisit these limits by inc
 luding the effect of dark matter (DM) captured inside the progenitor star 
 before collapse. The trapped DM acts as an additional scattering target fo
 r dark photons\, modifying their free-streaming length and\, consequently\
 , the supernova cooling rate. We perform a self-consistent analysis for bo
 th annihilating and asymmetric DM scenarios\, incorporating light-mediator
  effects in the capture rate calculation. For annihilating DM\, the equili
 brium density remains too small to affect the bounds significantly. In con
 trast\, symmetric DM can accumulate to large densities\, leading to the fo
 rmation of a “dark photosphere” that suppresses the dark-photon lumino
 sity. The results presented are intended as a proof-of-principle demonstra
 tion of how astrophysical dark matter populations can alter supernova cool
 ing constraints and do not provide precision exclusion limits on any give
 n model.\n\nhttps://indico.ific.uv.es/event/8558/
LOCATION:
URL:https://indico.ific.uv.es/event/8558/
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