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
复制
发表时间:
2020-05
影响因子:
4.4
通讯作者:
Yang Ya-Dong
Yang Ya-Dong
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Li Shao-Ping;Li Xin-Qiang;Yan Xin-Shuai;Yang Ya-Dong

文献摘要

参考文献

相似文献

我们提出了一个冻结实现的狄拉克中微子发生,其中产生轻子数不对称的衰变粒子是在热平衡。由于右手狄拉克中微子是非热产生的,轻子数不对称性被积累,并通过快速的sphaleron跃迁部分转化为重子数不对称性。CP破坏的必要条件可以由一个纯粹的热动力学阶段从轻子二重态部门的波函数修正,这已被忽略在大多数leptogenesis-based设置。此外,这个条件需要一个优选的风味基础,其中带电轻子和中微子汤川矩阵都是非对角的。为了保护这样一个适当的汤川结构免受电弱规范对称破缺之前味空间中的基变换的影响,我们可以求助于大量的旨在破译非平凡汤川结构的模型构建。有趣的是,基于著名的三双峰混合与带电轻子或中微子扇区的最小修正,我们发现,同时解释宇宙中的重子数不对称性和低能中微子振荡观测值可以归因于混合角和CP破坏相位中引入的最小修正。
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.
DOI: 10.1007/jhep01(2017)087
发表时间: 2016-11
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
DOI: 10.1016/j.physletb.2018.06.019
发表时间: 2017-08
期刊: Physics Letters B
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
DOI: 10.1007/jhep01(2016)018
发表时间: 2015-10
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