Seminar
Neutrino-antineutrino Mass Splitting in
the Standard Model and Baryogenesis
Prof Kazuo Fujikawa
RIKEN Nishina Center
13 July 2015 (Monday)
2:15 pm
IAS2042, 2/F, Lo Ka Chung Building, Lee Shau Kee Campus, HKUST
Abstract:
On the basis of a previously proposed mechanism of neutrino-antineutrino mass splitting in the Standard Model, which is Lorentz and SU(2)×U(1) invariant but non-local to evade CPT
theorem, the speaker discusses the possible implications of neutrino-antineutrino mass splitting on neutrino physics and baryogenesis. It is shown that non-locality within a distance scale of the Planck length, that may not be fatal to unitarity in generic effective theory, can generate the neutrino-antineutrino mass splitting of the order of observed neutrino mass differences, which is tested in oscillation experiments, and non-negligible baryon asymmetry depending on the estimate of sphaleron dynamics. The one-loop order induced electron-positron mass splitting in the Standard Model is shown to be finite and estimated at
~10−20 eV, well below the experimental bound <10−2 eV. The induced CPT violation in the K-meson in the Standard Model is expected to be even smaller and well below the experimental bound |mK−mK¯|<0.44×10−18 GeV.
The seminar is free and open to the public. No registration is required. Seating is on a first-come first-served basis.
HKUST Jockey Club Institute for Advanced Study
URL:
http://ias.ust.hk
Enquiries: ias@ust.hk / 2358 5912
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