Volume 129, Number 1, January 2020
|Number of page(s)||7|
|Section||The Physics of Elementary Particles and Fields|
|Published online||12 February 2020|
Testing texture two-zero neutrino mass matrices under current experimental scenario
Department of Physics, M.N.S. Government College Bhiwani - Bhiwani, Haryana, 127021, India
Received: 11 November 2019
Accepted: 21 January 2020
The latest data from the Planck Collaboration presented an improved sensitivity limit of the sum of neutrino masses , at 95 confidence level (CL). On the other hand, the updated global fits of neutrino oscillation have shown a refined range of atmospheric mixing angle at the same CL. In the light of these observations, we have re-investigated the five viable cases (B1, 2, 3, 4 and C) of the texture two-zero Majorana mass matrix in the flavor basis. Using the present Planck's data, we have demonstrated that only cases B2 and B4 are now viable for normal mass ordering, while the remaining three cases do not meet the present experimental constraints at 2σ CL. The phenomenological predictions of the viable cases are also found to be in tune with the latest T2K, Super-Kamiokande and NOνA results, showing the preference for normal neutrino mass ordering (m1 < m2 < m3), a maximal Dirac CP-violating phase , and the upper octant of the neutrino mixing angle . In addition, the implication of Σ on the neutrinoless double beta decay is studied for viable cases.
PACS: 14.60.Pq – Neutrino mass and mixing / 12.60.-i – Models beyond the standard model
© EPLA, 2020
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