SPHALERON-INDUCED BARYON-NUMBER NONCONSERVATION AND A CONSTRAINT ON MAJORANA NEUTRINO MASSES

被引：169

作者：

FUKUGITA, M ^{[1
]}

YANAGIDA, T ^{[1
]}

机构：

[1] TOHOKU UNIV, DEPT PHYS, SENDAI, MIYAGI 980, JAPAN

来源：

PHYSICAL REVIEW D | 1990年 / 42卷 / 04期

关键词：

D O I：

10.1103/PhysRevD.42.1285

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 (Majorana)<50 keV for all species of neutrions, regardless of whether or not neutrinos are stable. © 1990 The American Physical Society.

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页码：1285 / 1286

页数：2

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