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SUMMARY:March 2026 WG3 meeting
DTSTART:20260318T150000Z
DTEND:20260318T160000Z
DTSTAMP:20260505T020400Z
UID:indico-event-51490@agenda.infn.it
CONTACT:mgiannotti@unizar.es
DESCRIPTION:Speakers: Maurizio Giannotti\n\nGarv Chauhan will present the 
 talk:\nTitle : 511 keV Gamma-Ray Echo from Particle Decays in Supernovae\n
 Abstract : A core-collapse supernova (CCSN) can lead to the production of 
 beyond Standard Model (BSM) particles such as axion-like particles (ALPs).
  In my talk\, I will discuss how the decays of such heavy species can give
  rise to a unique 511 keV gamma-ray signature associated with BSM particle
 s produced in the core. We use this signal to set bounds on the $G_{a\\gam
 ma\\gamma}$ based on measurements from the Pioneer Venus Orbiter during SN
  1987A. Moreover\, I will show that upcoming MeV-gap gamma-ray telescopes 
 such as COSI and AMEGO with sensitivity in the 511 keV range\, can place s
 trong constraints or provide a complementary pathway for ALP discovery. Fi
 nally\, I will emphasize that such an “echo” signal should exist for a
 ll species that decay into neutrinos\, radiatively\, or directly into posi
 trons.\n\nhttps://agenda.infn.it/event/51490/
URL:https://agenda.infn.it/event/51490/
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