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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:1
UID:UW-Physics-Event-7054
DTSTART:20220908T193000Z
DTEND:20220908T203000Z
DTSTAMP:20260414T234052Z
LAST-MODIFIED:20220907T202659Z
LOCATION:Chamberlin 4274
SUMMARY:Light at the end of the tunnel: Astrophysical searches for axi
 on-like particles in gamma-ray energies\, NPAC (Nuclear/Particle/Astro
 /Cosmo) Forum\, Milena S. Crnogorcevic\, University of Maryland
DESCRIPTION:Axion-like particles (ALPs) are a well-motivated candidate
  for constituting a significant fraction of dark matter. They are prod
 uced in high-energy environments\, such as core-collapse supernovae (C
 CSNe)\, and could undergo conversion into gamma-rays in the presence o
 f an external magnetic field\, with a characteristic spectrum peaking 
 in the 30--100-MeV energy range. CCSNe are often invoked as progenitor
 s of ordinary long gamma-ray bursts (GRBs)\, allowing us to conduct a 
 search for potential ALP spectral signatures using GRB observations wi
 th Fermi Large Area Telescope (LAT). In this presentation\, I will tal
 k about using the Fermi LAT's low-energy (LLE) technique which\, in co
 ntrast to the standard LAT analysis\, allows for a larger effective ar
 ea for energies down to 30 MeV. I will summarize the statistical metho
 ds used in our analysis and the underlying physical assumptions\, the 
 feasibility of the upper limits on ALP coupling from our model compari
 son results\, and an outlook on future MeV instruments in the context 
 of ALP searches. 
URL:https://www.physics.wisc.edu/events/?id=7054
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