Baryogenesis via neutrino oscillations

被引:457
作者
Akhmedov, EK [1 ]
Rubakov, VA
Smirnov, AY
机构
[1] Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, Italy
[2] Natl Res Ctr Kurchatov Inst, Moscow 123182, Russia
[3] Univ Tokyo, Inst Cosm Ray Res, Tanashi, Tokyo 188, Japan
[4] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia
关键词
D O I
10.1103/PhysRevLett.81.1359
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We propose a new mechanism of leptogenesis in which the asymmetries in lepton numbers are produced through the CP-violating oscillations of "sterile" (electroweak singlet) neutrinos. The asymmetry is communicated from singlet neutrinos to ordinary leptons through their Yukawa couplings. The lepton asymmetry is then reprocessed into baryon asymmetry by electroweak sphalerons. We show that the observed value of baryon asymmetry can be generated in this way, and the masses of ordinary neutrinos induced by the seesaw mechanism are in the astrophysically and cosmologically interesting range. Except for singlet neutrinos, no physics beyond the standard model is required.
引用
收藏
页码:1359 / 1362
页数:4
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