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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:3
UID:UW-Physics-Event-6344
DTSTART:20210928T190000Z
DURATION:PT1H0M0S
DTSTAMP:20260414T191918Z
LAST-MODIFIED:20210923T134357Z
LOCATION:https://berkeley.zoom.us/j/99464252867
SUMMARY:Impact of EoS on Neutrino Opacities in Core-collapse Supernova
 e\, Network in Neutrinos\, Nuclear Astrophysics\, and Symmetries (N3AS
 ) Seminar\, Zidu Lin \, University of Tennessee Knoxville/ORNL
DESCRIPTION:Neutrinos radiate 99% of the energy and play a crucial rol
 e in the explosion mechanism and nucleosynthesis of core-collapse supe
 rnovae. The neutrino interactions in hot and dense matter is a complex
  problem due to bound nuclei and the strong nuclear forces. In this wo
 rk we calculate the dynamic and static response of the neutral current
  and charged current neutrino-nucleon interactions\, from low-density 
 region near the neutrino sphere to high-density region up to approxima
 tely 1.5 saturation densities at finite T\, by applying random phase a
 pproximation (RPA). We emphasize on the consistency between an equatio
 n of state (EoS) and the neutrino opacity\, by using the density-depen
 dent residual interactions\, effective mass\, single nucleon potential
 s directly derived from an EoS which matches experiment\, theory\, and
  observation in various density regimes. We further analyze the effect
  of EoSs on neutrino opacities by calculating the statistical uncertai
 nties of neutrino opacities. We found that our neutral current static 
 response based on RPA is close to the results from model-independent v
 irial approximation at low density\, and our description of neutrino o
 pacities at high densities have large uncertainties due to still uncle
 ar strong (especially spin-dependent) nuclear forces. 
URL:https://www.physics.wisc.edu/events/?id=6344
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