23-28 February 2020
Africa/Johannesburg timezone
See YouTube for CNNP2020 presentations!

Hints of non-unitarity in the present T2K and NO$\nu$A data

27 Feb 2020, 14:10
Main Venue

Main Venue


Ushak Rahaman (University of Johannesburg)


The mixing of three neutrino flavours is parameterised by the unitary
PMNS matrix. If there are more than three neutrino flavours, effective $3\times 3$ neutrino mixing
matrix will be non-unitary. In this paper, we have analysed the
latest T2K and NO$\nu$A data with the hypothesis of non-unitary mixing matrix.
Present results from NO$\nu$A and T2K collaboration have tension between them as NO$\nu$A disfavours T2K
best-fit point at $1\, \sigma$ confidence level and vice versa. In this paper we have shown that latest data from both the
experiments disfavour unitary $3\times 3$ mixing at $60\%$ C.L. The combined analysis disfavours unitary mixing
at $1\, \sigma$ C.L. Moreover, the tension between two experiments can also be reduced with the non-unitary approach.

Primary authors

Ushak Rahaman (University of Johannesburg) Dr Luis Salvador Miranda (University of Johannesburg) Dr Pedro Pasquini (Instituto de F\'i sica Te\'orica--Universidade Estadual Paulista (UNESP)\\ R. Dr. Bento Teobaldo Ferraz 271, Barra Funda\\ S\~ao Paulo - SP, 01140-070, Brazil, Instituto de F\'isica Gleb Wataghin - UNICAMP, 13083-859, Campinas SP, Brazi) Prof. Soebur Razzaque (University of Johannesburg)

Presentation Materials