Sensitivity to CP Discovery in the Presence of Lorentz Invariance Violating Potential at T2HK/T2HKK

TL;DR

This paper examines how Lorentz invariance violation impacts the ability of the T2HK/T2HKK neutrino experiments to detect CP violation, highlighting the importance of fundamental symmetry tests in neutrino physics.

Contribution

It analyzes the influence of Lorentz invariance violating parameters on CP violation sensitivity in proposed T2HK/T2HKK configurations, a novel focus in neutrino oscillation studies.

Findings

LIV parameters can significantly affect CP sensitivity.

Different detector configurations show varying sensitivities.

CPT violating parameters impact the detection of CP violation.

Abstract

Investigation of conservation/violation of CP symmetry in the leptonic sector is very essential in understanding the evolution of the universe. Lorentz invariance and CPT are fundamental symmetries of nature. The violation of Lorentz invariance can also lead to CPT violations. The standard three flavour neutrino oscillation framework presents a scenario to observe the signature of Lorentz invariance and CP violations. This work focuses on the effect of Lorentz invariance violating (LIV) parameters on the sensitivity to CP violation. We investigate the sensitivity in two proposed configurations of the upcoming T2HK experiment: (i) one detector each placed at 295 km and 1100 km, and (ii) two identical detectors at 295 km. This study probes the effect of CPT violating parameters $a_{e\mu},a_{e\tau},a_{\mu\tau}$.