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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3480
DTSTART:20140925T193000Z
DTEND:20140925T203000Z
DTSTAMP:20260419T172048Z
LAST-MODIFIED:20140919T211449Z
LOCATION:5280 Chamberlin Hall
SUMMARY:PeV neutrinos from right handed neutrino dark matter\, NPAC (N
 uclear/Particle/Astro/Cosmo) Forum\, Ryosuke Sato\, KEK
DESCRIPTION:The Standard Model of particle physics fails to explain th
 e important<br>
\npieces in the standard cosmology\, such as inflation
 \, baryogenesis\, and<br>
\ndark matter of the Universe. We consider t
 he possibility that the<br>
\nsector to generate small neutrino masses
  is responsible for all of<br>
\nthem\; the inflation is driven by the
  Higgs field to break B−L gauge<br>
\nsymmetry which provides the Ma
 jorana masses to the right-handed<br>
\nneutrinos\, and the reheating 
 process by the decay of the B−L Higgs<br>
\nboson supplies the secon
 d lightest right-handed neutrinos whose CP<br>
\nviolating decays prod
 uce B−L asymmetry\, a la\, leptogenesis. The<br>
\nlightest right-ha
 nded neutrinos are also produced by the reheating<br>
\nprocess\, and 
 remain today as the dark matter of the Universe. In the<br>
\nminimal 
 model of the inflaton potential\, one can set the parameter of<br>
\nt
 he potential by the data from CMB observations. In such a scenario\,<b
 r>
\nthe mass of the dark matter particle is predicted to be of the or
 der<br>
\nof PeV. We find that the decay of the PeV right-handed neutr
 inos can<br>
\nexplain the high-energy neutrino flux observed at the I
 ceCube<br>
\nexperiments if the lifetime is of the order of 10^28 s.
URL:https://www.physics.wisc.edu/events/?id=3480
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