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SEQUENCE:1
UID:UW-Physics-Event-6307
DTSTART:20210330T190000Z
DTEND:20210330T200000Z
DTSTAMP:20260415T010805Z
LAST-MODIFIED:20210330T132826Z
LOCATION:https://berkeley.zoom.us/j/91922781599\, hosted by Baha Balan
 tekin
SUMMARY:Theory of Fast Flavor Conversion of Supernova Neutrinos\, Netw
 ork in Neutrinos\, Nuclear Astrophysics\, and Symmetries (N3AS) Semina
 r\, Soumya Bhattacharyya\, Tata Institute of Fundamental Research
DESCRIPTION:A supernova natively emits neutrinos and antineutrinos of 
 all flavors with different luminosities and energy spectra. These neut
 rinos can undergo neutrino-neutrino forward-scattering inside the dens
 e anisotropic interior of the star and can lead to ``Fast Neutrino Fla
 vor Conversion''. We present the first ever theory of ``Fast Neutrino 
 Flavor Conversion'' beyond the linear regime to show how the different
  neutrino flavors are brought closer to each other or in other words `
 `Flavor Depolarizes'' due to irreversible decoherence-like processes o
 ccurring at a Tera-Hz rate\, determined by the large neutrino density.
  Our theory explains how depolarization happens\, when does it happen\
 , what determines the epoch and finally describes a method to calculat
 e the extent of depolarized fluxes. This new result allows detailed im
 plementation of flavor-dependent neutrino transport in supernova simul
 ations and paves the way for supernova neutrino phenomenology.
URL:https://www.physics.wisc.edu/events/?id=6307
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