Programme

P.42 -- Poster, VCTP-47

Date: Thursday, 4 August 2022

Time: 08:30 - 10:00

Neutrino mass spectrum with the present neutrino data

Phan To Quyen (1,2), Cao Van Son (1), Nguyen Thi Hong Van (3), Tran Van Ngoc (1,2)

(1) Institute For Interdisciplinary Research in Science and Education. (2) Graduate University of Science and Technology. (3) Institute of Physics

Neutrino oscillations discovered by Super-Kamiokande 1998, Sudbury Neutrino Observatory 2001, and others resulted in the existence of neutrino mass. This quantum mechanic phenomenon is beyond the description of the Standard Model and being explored for unearthing the mysteries in the particle physics. Neutrino mass is exceptionally small and physicists are unsure of its origin. Also, the neutrino mass spectrum is not precisely established yet. The neutrino mass is known to us from four sources: neutrino oscillation, cosmology, beta decay, and the search for neutrino-less double beta decay. In this work, we use a neutrino mass model in which neutrinos are assumed to be Majorana particles to reconstruct neutrino mass using the current constraints from all of these sources. The results show that, unlike quarks and charged leptons, the neutrino's reconstructive mass matrix does not follow any obvious hierarchy. This matrix is also shown to be dependent on the value of the CP-violation phase in the leptonic mixing matrix. As a result, precise measurement of the CP-violation is also critical for casting light on the neutrino mass model.

Presenter: Phan To Quyen