Neutrino-antineutrino mass splitting in the Standard Model and baryogenesis

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http://hdl.handle.net/10138/203408

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Fujikawa , K & Tureanu , A 2015 , ' Neutrino-antineutrino mass splitting in the Standard Model and baryogenesis ' Physics Letters B , vol. 743 , pp. 39-45 . DOI: 10.1016/j.physletb.2015.01.053

Title: Neutrino-antineutrino mass splitting in the Standard Model and baryogenesis
Author: Fujikawa, Kazuo; Tureanu, Anca
Contributor: University of Helsinki, Particle Physics and Astrophysics
Date: 2015-04-09
Language: eng
Number of pages: 7
Belongs to series: Physics Letters B
ISSN: 0370-2693
URI: http://hdl.handle.net/10138/203408
Abstract: On the basis of a previously proposed mechanism of neutrino-antineutrino mass splitting in the Standard Model, which is Lorentz and SU(2) xU(1) invariant but non-local to evade the CPTtheorem, we discuss 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 a generic effective theory, can generate the neutrino-antineutrino mass splitting of the order of the observed neutrino mass differences, which is tested in oscillation experiments, and a 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 similar to 10(-20)eV, well below the experimental bound
Subject: PSEUDO-DIRAC NEUTRINOS
INVARIANT CPT VIOLATION
WEINBERG-SALAM THEORY
BARYON-NUMBER
GAUGE THEORIES
OSCILLATIONS
UNIVERSE
LEPTOGENESIS
SCALES
114 Physical sciences
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