Sensitivity of T2KK to non-standard interactions

Assuming only the non-zero electron and tau neutrino components $ε_{ee}$, $ε_{eτ}$, $ε_{ττ}$ of the non-standard matter effect and postulating the atmospheric neutrino constraint $ε_{ττ}=|ε_{eτ}|^2/(1+ε_{ee})$, 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 $|ε_{ee}|\lesssim 1$, $|ε_{eτ}|\lesssim 0.2$.

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