Nonzero θ13 and leptogenesis in a type-I seesaw model with A4 symmetry

被引：48

作者：

Karmakar, Biswajit ^{[1
]}

Sil, Arunansu ^{[1
]}

机构：

[1] Indian Inst Technol Guwahati, Gauhati 781039, Assam, India

来源：

PHYSICAL REVIEW D | 2015年 / 91卷 / 01期

关键词：

VIOLATING DECAYS; LEPTON NUMBER; NEUTRINO; BARYOGENESIS; OSCILLATIONS; MECHANISM; HIERARCHY;

D O I：

10.1103/PhysRevD.91.013004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In light of the recent discovery of nonzero theta(13), we have analyzed the Altarelli-Feruglio A(4) flavor symmetry model extended with additional flavon. The inclusion of the new field leads to the deviation from the exact tri-bimaximal neutrino mixing pattern in the context of a type-I seesaw by producing a nonzero theta(13) consistent with the recent experimental results at the leading order. A sum rule for light neutrino masses is also obtained in this context. The setup constrains the two Majorana phases involved in the lepton mixing matrix in terms of A(4) parameter space. We have shown that a nonzero lepton asymmetry can be generated while next-to-leading order contributions to the neutrino Yukawa couplings are considered. The two Majorana phases play a crucial role in CP-asymmetry parameter and the involvement of theta(13) in it, is exercised.

引用

页数：16

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