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SEQUENCE:0
UID:UW-Physics-Event-4134
DTSTART:20160426T203000Z
DURATION:PT1H0M0S
DTSTAMP:20260415T154459Z
LAST-MODIFIED:20160425T162734Z
LOCATION:5280 Chamberlin Hall
SUMMARY:Simulating the neutrino sky: Cosmological probes of neutrino m
 ass\, Theory Seminar (High Energy/Cosmology)\, JD Emberson\, Argonne N
 ational Laboratory
DESCRIPTION:Neutrinos are second only to photons as the most abundant 
 particle in the Universe\, yet remain poorly understood due to their w
 eak interaction with other matter. In particular\, individual neutrino
  masses remain an elusive property for both particle physicists and co
 smologists. Recently\, it has been proposed that individual neutrino m
 ass may be constrained from a unique dipole distortion in the matter d
 ensity field induced by the relative flow between cold dark matter (CD
 M) and neutrinos. We study this effect by modifying the cosmology code
  CUBEP3M to evolve neutrino N-body particles alongside CDM. We have pe
 rformed the world's largest cosmological N-body simulation\, containin
 g roughly 3 trillion neutrino plus CDM particles\, completed using 86%
  of the Tianhe-2 supercomputer. In this talk\, we discuss preliminary 
 analysis of the simulation data in regards to the neutrino dipole dist
 ortion. We also present a new independent probe of neutrino mass that 
 was numerically detected in our simulation data. This new effect is du
 e to neutrino free streaming\, which sources local variations in the r
 elative abundance of neutrinos\, creating a differential bias that may
  skew the luminosity function of galaxies. 
URL:https://www.physics.wisc.edu/events/?id=4134
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