Phenomenology of keV sterile neutrino in minimal extended seesaw

被引：6

作者：

Das, Pritam ^{[1
]}

Das, Mrinal Kumar ^{[1
]}

机构：

[1] Tezpur Univ, Dept Phys, Tezpur 784028, Assam, India

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS A | 2020年 / 35卷 / 22期

关键词：

Beyond Standard Model; minimal extended seesaw; sterile neutrino; dark matter; 0 nu beta beta; baryogenesis; thermal leptogenesis; WARM DARK-MATTER; LEPTON; MASS; LEPTOGENESIS; OSCILLATIONS; SYMMETRY; FERMION; SEARCH;

D O I：

10.1142/S0217751X20501250

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We explore the possibility of a single generation of keV scale sterile neutrino (m(S)) as a dark matter candidate within the minimal extended seesaw (MES) framework and its influence in neutrinoless double beta decay (0 nu beta beta) study. Three hierarchical right-handed neutrinos were considered to explain neutrino mass. We also address baryogenesis via the mechanism of thermal leptogenesis considering the decay of the lightest RH neutrino to a lepton and Higgs doublet. A generic model based on A(4) X Z(4) X Z(3) flavor symmetry is constructed to explain both normal and inverted hierarchy mass pattern of neutrinos. Significant results on effective neutrino masses are observed in presence of sterile mass (m(S)) and active-sterile mixing (theta(S)) in 0 nu beta beta. Results from 0 nu beta beta give stringent upper bounds on the active-sterile mixing matrix element. To establish sterile neutrino as dark matter within this model, we checked decay width and relic abundance of the sterile neutrino, which restricted sterile mass (m(S)) within some definite bounds. Constrained regions on the CP phases and Yukawa couplings are obtained from 0 nu beta beta and baryogenesis results. Co-relations among these observable are also established and discussed within this framework.

引用

页数：27

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