English

Neutrino mass matrices with one texture zero and a vanishing neutrino mass

High Energy Physics - Phenomenology 2017-03-15 v1

Abstract

Assuming Majorana nature of neutrinos, we investigate the singular one texture zero neutrino mass matrices in the flavor basis. We find that for the normal mass ordering with m1=0m_1=0, all the six one texture zero classes are now ruled out at 3σ\sigma confidence level, whereas for inverted mass ordering with m3=0m_3=0 only four classes out of total six can accommodate the latest neutrino oscillation data at 3σ\sigma confidence level. Moreover, only two classes can accommodate the present data at 1σ\sigma confidence level. We examine the phenomenological implications of the allowed classes for the effective Majorana mass, Dirac and Majorana CP-violating phases. Working within the framework of type-I seesaw mechanism, we present simple discrete Abelian symmetry models leading to all the phenomenologically allowed classes.

Keywords

Cite

@article{arxiv.1506.04868,
  title  = {Neutrino mass matrices with one texture zero and a vanishing neutrino mass},
  author = {Radha Raman Gautam and Madan Singh and Manmohan Gupta},
  journal= {arXiv preprint arXiv:1506.04868},
  year   = {2017}
}

Comments

11 pages, 3 figures, 5 tables