Flavor symmetric origin of texture zeros in minimal inverse seesaw and impacts on leptogenesis

Nayana Gautam; Mrinal Kumar Das

doi:10.1016/j.physletb.2022.137302

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arXiv · 2204.11450

Flavor symmetric origin of texture zeros in minimal inverse seesaw and impacts on leptogenesis

Nayana Gautam·Mrinal Kumar Das

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Abstract

We study the prediction of maximal zeros of the Dirac mass matrix on neutrino phenomenology and baryon asymmetry of the universe (BAU) within the framework of an inverse seesaw ISS $(2,3)$. We try to find the origin of the allowed two zero textures of the Dirac mass matrix from $S_{4}$ flavor symmetry. ISS $(2,3)$ model contains two pairs of quasi-Dirac particles and one sterile state in the keV scale along with three active neutrinos. The decays of the quasi-Dirac pairs create lepton asymmetry that can be converted to baryon asymmetry of the universe by the sphaleron process. Thus, BAU can be explained in this framework through leptogenesis. We study BAU in all the two zero textures of the Dirac mass matrix. The viabilities of the textures within the framework have been verified with the latest cosmology data on BAU.

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Nayana Gautam, Mrinal Kumar Das. 2022-07-21. Flavor symmetric origin of texture zeros in minimal inverse seesaw and impacts on leptogenesis. https://doi.org/10.1016/j.physletb.2022.137302

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