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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:2
UID:UW-Physics-Event-6560
DTSTART:20210816T193000Z
DURATION:PT1H0M0S
DTSTAMP:20260414T192157Z
LAST-MODIFIED:20210816T134653Z
LOCATION:2241 Chamberlin Hall and zoom link below
SUMMARY:high-energy cosmic neutrinos as a window to the Universe\, Gra
 duate Program Event\, Qinrui Liu\, Physics PhD Graduate Student
DESCRIPTION:The Universe is a natural laboratory for us to investigate
  physics. Neutrinos of cosmic origin are an excellent messenger explor
 ing astronomy\, cosmology and particle physics\, for they are tiny\, n
 eutral and weakly-interacting\, which leads to undeflected and nearly 
 unscathed travel across the Universe to Earth from their sources. They
  are an important piece in solving several significant open questions 
 in physics such as the mystery of cosmic ray accelerators\, as high-en
 ergy cosmic neutrinos play the role of a smoking-gun signal of hadroni
 c interactions of cosmic rays\, and the nature of dark matter as neutr
 inos can be produced in dark matter annihilation or decay\, providing 
 an indirect signature. 
\n
\nThe IceCube experiment discovered TeV-PeV
  neutrinos of astrophysical origin with an energy flux comparable to t
 hat of gamma rays and cosmic rays. One mission that comes afterwards i
 s to identify where those neutrinos come from and how they are produce
 d. I will discuss the search for their astrophysical sources\, emphasi
 zing the efforts to identify sources in our Galaxy from candidates pul
 sar wind nebulae and X-ray binaries with IceCube data. Like atmospheri
 c neutrinos\, the beam of cosmic neutrinos provides us with excellent 
 opportunities to study physics beyond the standard model\, e.g. dark m
 atter annihilation and decay. The indirect searches of dark matter wil
 l be discussed with a focus on a new computation of neutrino signals f
 rom dark matter accumulated in multiple celestial environments. 
\n
\n
 https://uwmadison.zoom.us/j/97332013167?pwd=ZisvNUJERlVvaEcxWnVjS05pcl
 Brdz09
URL:https://www.physics.wisc.edu/events/?id=6560
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