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SEQUENCE:2
UID:UW-Physics-Event-5081
DTSTART:20190321T190000Z
DTEND:20190321T200000Z
DTSTAMP:20260419T084949Z
LAST-MODIFIED:20190318T193548Z
LOCATION:5280 Chamberlin Hall
SUMMARY:The Astrophysical Neutrino Flavor Composition With Cosmic Tau 
 Neutrinos \, NPAC (Nuclear/Particle/Astro/Cosmo) Forum\, Juliana Stach
 urska\, DESY
DESCRIPTION:The tau neutrino is the Standard Model particle with the f
 ewest identified events. Most tau-neutrino interactions cannot be dist
 inguished from other flavor neutrino interactions. This is due to the 
 large mass of the tau\, which causes the production threshold to open 
 up at a few GeV\, and the prompt tau decay. The study of astrophysical
  neutrinos provides important clues about cosmic particle accelerators
 . In particular\, the tau neutrino fraction at Earth is directly trans
 latable to the source flavor composition and can constrain source prod
 uction mechanisms. For neutrinos of energies greater than ~100 TeV\, I
 ceCube becomes sensitive to the identification of tau-neutrino charged
  current interaction on an event-by-event basis via the double bang ch
 annel. This channel consists two energy depositions one from the tau p
 roduction and the other from the tau decay. With no significant tau ne
 utrino production expected at the source\, IceCube is the first experi
 ment able to observe neutrino oscillations over cosmological baselines
 . I will present and discuss recent measurements of the astrophysical 
 flavor composition.
URL:https://www.physics.wisc.edu/events/?id=5081
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