Sphaleron-induced baryon-number nonconservation and a constraint on Majorana neutrino masses
説明
We point out that the baryon-number asymmetry in the Universe is erased by the sphaleron effect just below the electroweak phase transition irrespective of the primordial baryon- and lepton-number asymmetry, if there exists a Majorana-type interaction. The requirement to avoid this happening leads to the condition that ${m}_{\ensuremath{\nu}} (\mathrm{Majorana})l50$ keV for all species of neutrions, regardless of whether or not neutrinos are stable.
収録刊行物
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- Physical Review D
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Physical Review D 42 (4), 1285-1286, 1990-08-15
American Physical Society (APS)
