Leptonic CP violation from the seesaw mechanism

被引：1

作者：

Nishi, C. C. ^{[1
]}

Silva-Marcos, J. I. ^{[2
,3
]}

机构：

[1] Univ Fed ABC, Ctr Matemat Computacao & Cognicao, BR-09210170 Santo Andre, SP, Brazil

[2] Univ Lisbon, Ctr Fis Teor Particulas CFTP, Ave Rovisco Pais, P-1049001 Lisbon, Portugal

[3] Univ Lisbon, Dept Fis Inst Super Tecn IST, Ave Rovisco Pais, P-1049001 Lisbon, Portugal

来源：

PHYSICAL REVIEW D | 2023年 / 108卷 / 09期

基金：

巴西圣保罗研究基金会;

关键词：

MASS; LEPTOGENESIS; BARYOGENESIS; BRIDGE; MODEL;

D O I：

10.1103/PhysRevD.108.095031

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The seesaw extension of the SM explains the tiny neutrino masses, and it is accompanied by many CP violating phases. We study the case where all leptonic CP violation arises from the soft breaking in the heavy Majorana mass matrix. Parameter counting reveals that one less parameter is needed to describe this case. This reduction leads to restrictions on the parameter space of heavy neutrinos. We analyze the minimal seesaw case in detail and find that mass degeneracy of heavy neutrinos is not possible for certain values of the CP phases.

引用

页数：16

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