Five-zero texture in neutrino-dark matter model within the framework of minimal extended seesaw

Pritam Das (Department of Physics, Tezpur University, Assam, India; Department of Physics, Indian Institute of Technology, Assam, India) ; Mrinal Kumar Das (Department of Physics, Tezpur University, Assam, India) ; Najimuddin Khan (School of Physical Sciences, Indian Association for the Cultivation of Science, Kolkata, India; School of Physics, Institute for Research in Fundamental Sciences (IPM), Tehran, Iran)

We study a model of neutrino and dark matter within the framework of a minimal extended seesaw (MES). This model is based on A4 flavour symmetry along with the discrete Z3×Z4 symmetry to stabilize the dark matter and construct desired mass matrices for neutrino mass. Five-zero textures are imposed in the final 4×4 active-sterile mass matrix, which significantly reduces the free parameter in the model. Three right-handed neutrinos were considered, two of them have degenerate masses which help us to achieve baryogenesis via resonant leptogenesis. A singlet fermion (sterile neutrino) with mass O(eV) is also considered, and we are able to put bounds on active-sterile mixing parameters via neutrino oscillation data. Resonant enhancement of lepton asymmetry is studied at the TeV scale, where we discuss a few aspects of baryogenesis considering the flavour effects. The possibility of improvement in effective mass from 0νββ in the presence of a single generation of sterile neutrino flavour is also studied within the fermion sector. In the scalar sector, the imaginary component of the complex singlet scalar (χ) is behaving as a potential dark matter candidate and simultaneously the real part of the complex scalar is associated with the fermion sector for sterile mass generation.

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      "full_name": "Das, Mrinal Kumar", 
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      "surname": "Khan", 
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      "title": "Five-zero texture in neutrino-dark matter model within the framework of minimal extended seesaw"
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      "value": "We study a model of neutrino and dark matter within the framework of a minimal extended seesaw (MES). This model is based on <math><msub><mrow><mi>A</mi></mrow><mrow><mn>4</mn></mrow></msub></math> flavour symmetry along with the discrete <math><msub><mrow><mi>Z</mi></mrow><mrow><mn>3</mn></mrow></msub><mo>\u00d7</mo><msub><mrow><mi>Z</mi></mrow><mrow><mn>4</mn></mrow></msub></math> symmetry to stabilize the dark matter and construct desired mass matrices for neutrino mass. Five-zero textures are imposed in the final <math><mn>4</mn><mo>\u00d7</mo><mn>4</mn></math> active-sterile mass matrix, which significantly reduces the free parameter in the model. Three right-handed neutrinos were considered, two of them have degenerate masses which help us to achieve baryogenesis via resonant leptogenesis. A singlet fermion (sterile neutrino) with mass <math><mo>\u223c</mo><mi>O</mi></math>(eV) is also considered, and we are able to put bounds on active-sterile mixing parameters via neutrino oscillation data. Resonant enhancement of lepton asymmetry is studied at the TeV scale, where we discuss a few aspects of baryogenesis considering the flavour effects. The possibility of improvement in effective mass from <math><mn>0</mn><mi>\u03bd</mi><mi>\u03b2</mi><mi>\u03b2</mi></math> in the presence of a single generation of sterile neutrino flavour is also studied within the fermion sector. In the scalar sector, the imaginary component of the complex singlet scalar (\u03c7) is behaving as a potential dark matter candidate and simultaneously the real part of the complex scalar is associated with the fermion sector for sterile mass generation."
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Published on:
17 June 2022
Publisher:
Elsevier
Published in:
Nuclear Physics B , Volume 980 C (2022)

Article ID: 115810
DOI:
https://doi.org/10.1016/j.nuclphysb.2022.115810
Copyrights:
The Author(s)
Licence:
CC-BY-3.0

Fulltext files: