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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:2
UID:UW-Physics-Event-8379
DTSTART:20230905T193000Z
DTEND:20230905T203000Z
DTSTAMP:20260414T005911Z
LAST-MODIFIED:20230904T235706Z
LOCATION:WIPAC supernova / https://wipac-science.zoom.us/j/94254277222
 ?pwd=QVJ1dHNCaFdmYnk1Vzk2TWJuQ3RwUT09
SUMMARY:Hunting the origin of ultrahigh-energy cosmic rays through neu
 trinos and gamma-rays\, NPAC (Nuclear/Particle/Astro/Cosmo) Forum\, Sa
 ikat Das\, Yukawa Institute\, Kyoto University\, Japan
DESCRIPTION:Ultrahigh-energy cosmic rays (UHECRs) are the highest-ener
 gy particles observed in the Universe\, with their energy spectrum ext
 ending beyond a few times 1e20 eV. Their unknown sources can also cont
 ribute to the diffuse astrophysical neutrino flux measured by IceCube 
 in the TeV-PeV energy range. By modelling their multi-wavelength energ
 y spectrum\, we probe cosmic ray acceleration in high-energy gamma-ray
  sources such as active galactic nuclei and gamma-ray bursts. In parti
 cular\, I will discuss models explaining the correlation of a high-ene
 rgy neutrino event from the direction of the Fermi-LAT gamma-ray blaza
 r TXS 0506+056\, and the >10 TeV afterglow emission in GRB 221009A. Us
 ing a luminosity-dependent density evolution\, I will also present the
  PeV-EeV diffuse neutrino flux from the entire blazar population. For 
 a generic source distribution\, the detection of cosmogenic neutrinos 
 beyond ~0.1 EeV is favourable by upcoming detectors\, such as IceCube 
 Gen-2\, GRAND and POEMMA\, depending on the UHECR mass composition. La
 stly\, I shall discuss the superheavy dark matter origin of the high-e
 nergy cosmic rays\, gamma rays\, and neutrinos.
URL:https://www.physics.wisc.edu/events/?id=8379
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