期刊论文

Li, Xin-Qiang

英文

EUROPEAN PHYSICAL JOURNAL C

1434-6044

2020

80

12

10.1140/epjc/s10052-020-08696-z

National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [12075097, 11675061, 11775092]; Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities [CCNU20TS007, 2019YBZZ079]

本校为第一且通讯机构

We present a freeze-in realization of the Dirac neutrinogenesis in which the decaying particle that generates the lepton-number asymmetry is in thermal equilibrium. As the right-handed Dirac neutrinos are produced non-thermally, the lepton-number asymmetry is accumulated and partially converted to the baryon-number asymmetry via the rapid sphaleron transitions. The necessary CP-violating condition can be fulfilled by a purely thermal kinetic phase from the wavefunction correction in the lepton-doublet sector, which has been neglected in most le...