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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:20240319T064927Z
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
\npieces in the standard cosmology\, such as inflation
\, baryogenesis\, and
\ndark matter of the Universe. We consider t
he possibility that the
\nsector to generate small neutrino masses
is responsible for all of
\nthem\; the inflation is driven by the
Higgs field to break B−L gauge
\nsymmetry which provides the Ma
jorana masses to the right-handed
\nneutrinos\, and the reheating
process by the decay of the B−L Higgs
\nboson supplies the secon
d lightest right-handed neutrinos whose CP
\nviolating decays prod
uce B−L asymmetry\, a la\, leptogenesis. The
\nlightest right-ha
nded neutrinos are also produced by the reheating
\nprocess\, and
remain today as the dark matter of the Universe. In the
\nminimal
model of the inflaton potential\, one can set the parameter of
\nt
he potential by the data from CMB observations. In such a scenario\,
\nthe mass of the dark matter particle is predicted to be of the or
der
\nof PeV. We find that the decay of the PeV right-handed neutr
inos can
\nexplain the high-energy neutrino flux observed at the I
ceCube
\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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