Programme

O.1 -- Oral, VCTP-47

Date: Monday, 1 August 2022

Time: 11:10 - 11:35

The possibility of discovering CPT violation with T2K-II, NOvA-II and JUNO

T. V. Ngoc (1,2), S. Cao (1), N. T. Hong Van (3), P. T. Quyen (1,2)

(1) Institute for interdisciplinary research in science and education, ICISE, Quy Nhon, Vietnam (2) Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Viet Nam. (3) Institute of Physics, Vietnam Academy of Science and Technology, Hanoi, Vietnam

The CPT symmetry which is the combination of charge conjugation C, parity inversion P, and time reversal T, predicts that particle and its antiparticle must have the same mass and lifetime. Neutrino oscillation experiments can precisely measure the mass squared differences ($\Delta m^2_{21}, \Delta m^2_{31}$) and mixing angles ($\theta_{12}, \theta_{13}, \theta_{23}$) of neutrinos and antineutrinos. They therefore can be the best tools for testing CPT invariance. In this talk, we will present the possibility to discover CPT violation with the synergy of T2K-II, NOvA-II and JUNO experiments. The combination of the three experiments will be able to exclude CPT invariance at $3\sigma$ C. L. It also can improve the bound on $|\Delta m^2_{31} - \Delta \overline{m}^2_{31}|$ to the world best value ever, $8.3 \times 10^{-5} eV^2$ at $3\sigma$ C. L. which is about one order better in magnitude compared to the current value analyzed by neutrino oscillation experiments ($2.5 \times 10^{-4} eV^2$). We also show how the sensitivity depends on true values of the oscillation parameters.

Presenter: Tran Van Ngoc