Leptogenesis in an SU(5) x A5 golden ratio flavour model

被引：20

作者：

Gehrlein, Julia ^{[1
]}

Petcov, Serguey T. ^{[2
,3
,6
]}

Spinrath, Martin ^{[1
]}

Zhang, Xinyi ^{[4
,5
]}

机构：

[1] Karlsruhe Inst Technol, Inst Theoret Teilchenphys, D-76131 Karlsruhe, Germany

[2] Ist Nazl Fis Nucl, SISSA, I-34136 Trieste, Italy

[3] Univ Tokyo, Kavli IPMU WPI, Tokyo, Japan

[4] Peking Univ, Sch Phys, Beijing 100871, Peoples R China

[5] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China

[6] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, BU-1784 Sofia, Bulgaria

来源：

NUCLEAR PHYSICS B | 2015年 / 896卷

关键词：

LEPTONIC CP VIOLATION; BARYOGENESIS; PHASES;

D O I：

10.1016/j.nuclphysb.2015.04.019

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

In this paper we discuss a minor modification of a previous SU(5) x A(5) flavour model which exhibits at leading order golden ratio mixing and sum rules for the heavy and the light neutrino masses. Although this model could predict all mixing angles well it fails in generating a sufficient large baryon asymmetry via the leptogenesis mechanism. We repair this deficit here, discuss model building aspects and give analytical estimates for the generated baryon asymmetry before we perform a numerical parameter scan. Our setup has only a few parameters in the lepton sector. This leads to specific constraints and correlations between the neutrino observables. For instance, we find that in the model considered only the neutrino mass spectrum with normal mass ordering and values of the lightest neutrino mass in the interval 10-18 meV are compatible with the current data on the neutrino oscillation parameters. With the introduction of only one NLO operator, the model can accommodate successfully simultaneously even at 1 sigma level the current data on neutrino masses, on neutrino mixing and the observed value of the baryon asymmetry. (C) 2015 The Authors. Published by Elsevier B.V.

引用

页码：311 / 329

页数：19

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