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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3176
DTSTART:20131206T200000Z
DURATION:PT1H0M0S
DTSTAMP:20260309T053427Z
LAST-MODIFIED:20131203T025817Z
LOCATION:5280 Chamberlin Hall
SUMMARY:The dark 3+1+1 model\, Theory Seminar (High Energy/Cosmology)\
 , Jinrui Huang\, Los Alamos National Lab
DESCRIPTION:The existence of light sterile neutrinos in the eV mass ra
 nge with relatively large mixing angles with the active neutrinos has 
 been proposed for a variety of reasons\, including to improve the fit 
 to the LSND and MiniBooNE neutrino oscillation experiments\, and react
 or disappearance experiments. It was shown that neutrino mixing with a
  heavier sterile neutrino\, in the mass range between 33 eV and severa
 l GeV\, could significantly affect and improve the agreement between n
 eutrino oscillation models with light sterile neutrinos and short base
 line experimental results\, allowing for a new source of CP violation 
 in appearance experiments and for different apparent mixing angles in 
 appearance and disappearance experiments. However various collider exp
 eriment\, supernovae\, and cosmological constraints can eliminate most
  of the parameter region where such a heavy sterile neutrino can have 
 a significant effect on neutrino oscillations. I will present a model 
 allowing a new light scalar in the MeV mass region\, which is a potent
 ial dark matter candidate\, to interact with the sterile neutrinos. Th
 e model can satisfy all experimental constraints and is a consistent t
 heory of neutrino oscillation anomalies and dark matter which can also
  potentially explain the INTEGRAL excess of 511 keV gamma rays in the 
 central region of the galaxy.
URL:https://www.physics.wisc.edu/events/?id=3176
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