Active and sterile neutrino phenomenology with Based Minimal Extended Seesaw

Pritam Das (Department of Physics, Tezpur University, Tezpur 784 028, India) ; Ananya Mukherjee (Department of Physics, Tezpur University, Tezpur 784 028, India) ; Mrinal Kumar Das (Department of Physics, Tezpur University, Tezpur 784 028, India)

We study a model of neutrino within the framework of minimal extended seesaw (MES), which plays an important role in active and sterile neutrino phenomenology in (3+1) scheme. The A4 flavor symmetry is augmented by additional Z4×Z3 symmetry to constraint the Yukawa Lagrangian of the model. We use non-trivial Dirac mass matrix, with broken μτ symmetry, as the origin of leptonic mixing. Interestingly, such structure of mixing naturally leads to the non-zero reactor mixing angle θ13. Non-degenerate mass structure for right-handed neutrino MR is considered so that we can further extend our study to Leptogenesis. We have also considered three different cases for sterile neutrino mass, MS to check the viability of this model, within the allowed 3σ bound in this MES framework.

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      "value": "We study a model of neutrino within the framework of minimal extended seesaw (MES), which plays an important role in active and sterile neutrino phenomenology in (3+1) scheme. The <math><msub><mrow><mi>A</mi></mrow><mrow><mn>4</mn></mrow></msub></math> flavor symmetry is augmented by additional <math><msub><mrow><mi>Z</mi></mrow><mrow><mn>4</mn></mrow></msub><mo>\u00d7</mo><msub><mrow><mi>Z</mi></mrow><mrow><mn>3</mn></mrow></msub></math> symmetry to constraint the Yukawa Lagrangian of the model. We use non-trivial Dirac mass matrix, with broken <math><mi>\u03bc</mi><mo>\u2212</mo><mi>\u03c4</mi></math> symmetry, as the origin of leptonic mixing. Interestingly, such structure of mixing naturally leads to the non-zero reactor mixing angle <math><msub><mrow><mi>\u03b8</mi></mrow><mrow><mn>13</mn></mrow></msub></math>. Non-degenerate mass structure for right-handed neutrino <math><msub><mrow><mi>M</mi></mrow><mrow><mi>R</mi></mrow></msub></math> is considered so that we can further extend our study to Leptogenesis. We have also considered three different cases for sterile neutrino mass, <math><msub><mrow><mi>M</mi></mrow><mrow><mi>S</mi></mrow></msub></math> to check the viability of this model, within the allowed 3\u03c3 bound in this MES framework."
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Published on:
13 March 2019
Publisher:
Elsevier
Published in:
Nuclear Physics B , Volume 941 C (2019)

Pages 755-779
DOI:
https://doi.org/10.1016/j.nuclphysb.2019.02.024
Copyrights:
The Author(s)
Licence:
CC-BY-3.0

Fulltext files: