Non-Standard Neutrino Physics Probed by Tokai-to-Kamioka-Korea Two-Detector Complex

TL;DR

This paper investigates the potential of the T2KK neutrino experiment to detect non-standard neutrino interactions and quantum decoherence, showing it can significantly tighten existing bounds on these phenomena.

Contribution

It provides a detailed analysis of T2KK's sensitivity to non-standard neutrino physics, focusing on matter interactions and decoherence effects, with improved bounds demonstrated.

Findings

T2KK can improve bounds on NSI parameters, e.g., epsilon_{mu tau} < 0.03.

Significant enhancement over current bounds on non-standard interactions.

Potential to detect quantum decoherence effects in neutrino oscillations.

Abstract

The discovery potentials of non-standard physics (NSP) which might be possessed by neutrinos are examined by taking a concrete setting of Tokai-to-Kamioka-Korea (T2KK) two detector complex which receives neutrino superbeam from J-PARC. We restrict ourselves into \nu_{\mu} and \bar{\nu}_{\mu} disappearance measurement. We describe here only the non-standard interactions (NSI) of neutrinos with matter and the quantum decoherence. It is shown in some favorable cases T2KK can significantly improve the current bounds on NSP. For NSI, for example, epsilon_{\mu\tau} < 0.03, which is a factor 5 severer than the current one.