Freeze-in Dirac neutrinogenesis: thermal leptonic CP asymmetry
Freeze-in Dirac neutrinogenesis: thermal leptonic CP asymmetry
复制标题
冻结狄拉克中微子发生:热轻子 CP 不对称性
DOI:
10.1140/epjc/s10052-020-08696-z
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发表时间:
2020-05
影响因子:
4.4
通讯作者:
Yang Ya-Dong
中科院分区:
文献类型:
--
作者:
Li Shao-Ping;Li Xin-Qiang;Yan Xin-Shuai;Yang Ya-Dong
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 leptogenesis-based setup. Furthermore, this condition necessitates a preferred flavor basis in which both the charged-lepton and neutrino Yukawa matrices are non-diagonal. To protect such a proper Yukawa structure from the basis transformations in flavor space prior to the electroweak gauge symmetry breaking, we can resort to a plethora of model buildings aimed at deciphering the non-trivial Yukawa structures. Interestingly, based on the well-known tri-bimaximal mixing with a minimal correction from the charged-lepton or neutrino sector, we find that a simultaneous explanation of the baryon-number asymmetry in the Universe and the low-energy neutrino oscillation observables can be attributed to the mixing angle and the CP-violating phase introduced in the minimal correction.
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影响因子:
5.4
作者:
I. Esteban;M. Gonzalez-Garcia;M. Maltoni;I. Martinez-Soler;T. Schwetz
通讯作者:
I. Esteban;M. Gonzalez-Garcia;M. Maltoni;I. Martinez-Soler;T. Schwetz
DOI:
10.1103/physrevd.42.562
发表时间:
1990-07
期刊:
Physical review. D, Particles and fields
影响因子:
--
作者:
Kobes
通讯作者:
Kobes
影响因子:
4.4
作者:
P. F. D. Salas;D. V. Forero;D. V. Forero;C. A. Ternes;M. Tórtola;J. Valle
通讯作者:
P. F. D. Salas;D. V. Forero;D. V. Forero;C. A. Ternes;M. Tórtola;J. Valle
DOI:
10.1007/bf00048810
发表时间:
1991
期刊:
Acta Applicandae Mathematica
影响因子:
--
作者:
D. Bödeker
通讯作者:
D. Bödeker
影响因子:
5.4
作者:
E. Bertuzzo;Yuber F. Perez G.;O. Sumensari;R. Funchal
通讯作者:
E. Bertuzzo;Yuber F. Perez G.;O. Sumensari;R. Funchal