Neutrino mass, leptogenesis and sterile neutrino dark matter in inverse seesaw framework

被引：4

作者：

Gautam, Nayana ^{[1
]}

Das, Mrinal Kumar ^{[1
]}

机构：

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

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS A | 2021年 / 36卷 / 21期

关键词：

Neutrino mass; dark matter; sterile neutrino; leptogenesis; BARYOGENESIS;

D O I：

10.1142/S0217751X21501463

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 study S-4 flavor symmetric inverse seesaw model which has the possibility of simultaneously addressing neutrino phenomenology, dark matter (DM) and baryon asymmetry of the universe (BAU) through leptogenesis. The model is the extension of the standard model by the addition of two (RH) neutrinos and three sterile fermions leading to a keV scale sterile neutrino DM and two pairs of quasi-Dirac states. The CP violating decay of the lightest quasi-Dirac pair present in the model generates lepton asymmetry which then converts to BAU. Thus, this model can provide a simultaneous solution for nonzero neutrino mass, DM content of the universes and the observed baryon asymmetry. The S4 flavor symmetry in this model is augmented by additional Z(4) x Z(3) symmetry to constrain the Yukawa Lagrangian. A detailed numerical analysis has been carried out to obtain DM mass, DM-active mixing as well as BAU both for normal hierarchy as well as inverted hierarchy. We try to correlate the two cosmological observables and found a common parameter space satisfying the DM phenomenology and BAU. The parameter space of the model is further constrained from the latest cosmological bounds on the observables.

引用

页数：24

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