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PRODID:UW-Madison-Physics-Events
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SEQUENCE:1
UID:UW-Physics-Event-8567
DTSTART:20240126T200000Z
DTEND:20240126T210000Z
DTSTAMP:20260413T223338Z
LAST-MODIFIED:20240120T005643Z
LOCATION:Chamberlin Hall 5280
SUMMARY:The flavor composition of high-energy cosmic neutrinos: toward
 s high statistics and ultra-high energies\, NPAC (Nuclear/Particle/Ast
 ro/Cosmo) Forum\, Mauricio Bustamante\, Niels Bohr Institute\, Univers
 ity of Copenhagen
DESCRIPTION:The flavor composition of high-energy cosmic neutrinos\, i
 .e.\, the
\nproportion of neutrinos of different flavor in their flux-
 --electron\, muon\, and tau---is a versatile observable to test astrop
 hysics and particle physics.  For astrophysics\, it allows us to ident
 ify the neutrino production process and so narrow down the identity of
  their sources. For fundamental physics\, it allows us to probe physic
 s beyond the Standard Model at hitherto untested energies.  Yet\, so f
 ar\, the experimental difficulties involved in measuring flavor compos
 ition in IceCube have hampered its physics reach.  Fortunately\, this 
 may be for not much longer\, thanks to upcoming\, larger neutrino tele
 scopes.  I will show state-of-the-art forecasts for the measurement of
  the flavor composition of TeV-PeV cosmic neutrinos in the next two de
 cades using the combined detection by multiple neutrino telescopes. To
 gether\, they
\ncould enable measurements of the energy dependence of 
 the flavor
\ncomposition---revealing changes in the neutrino productio
 n process---and of its directional dependence---revealing flavor asymm
 etries in the high-energy neturino sky.  I will conclude by proposing 
 novel techniques to extend flavor-composition measurements to ultra-hi
 gh energies\, beyond 100 PeV\, using large-scale radio-detection in Ic
 eCube-Gen2 and GRAND.
\n
URL:https://www.physics.wisc.edu/events/?id=8567
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