Sensitivity of T2KK to non-standard interactions

TL;DR

This paper evaluates how well the T2KK experiment can detect or constrain specific non-standard neutrino interactions involving electron and tau neutrinos, under certain assumptions about their effects on neutrino propagation.

Contribution

It provides the first sensitivity estimates of T2KK to non-standard neutrino matter interactions with specific parameter assumptions.

Findings

T2KK can constrain |_{ee}|  1

T2KK can constrain |_{e}|  0.2

Sensitivity estimates depend on assumed matter effect parameters

Abstract

Assuming only the non-zero electron and tau neutrino components $\epsilon_{ee}$, $\epsilon_{e\tau}$, $\epsilon_{\tau\tau}$ of the non-standard matter effect and postulating the atmospheric neutrino constraint $\epsilon_{\tau\tau}=|\epsilon_{e\tau}|^2/(1+\epsilon_{ee})$, the sensitivity to the non-standard interaction in neutrino propagation of the T2KK neutrino long-baseline experiment is estimated. It is found that T2KK can constrain the parameters $|\epsilon_{ee}|\lesssim 1$, $|\epsilon_{e\tau}|\lesssim 0.2$.