Sensitivity of T2KK to non-standard interactions

Assuming only the non-zero electron and tau neutrino components ${ϵ}_{ee}$, ${ϵ}_{e\tau }$, ${ϵ}_{\tau \tau }$ of the non-standard matter effect and postulating the atmospheric neutrino constraint ${ϵ}_{\tau \tau }=\mathrm{\mid }{ϵ}_{e\tau }{\mathrm{\mid }}^2\mathrm{/}(1+{ϵ}_{ee})$, 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 $\mathrm{\mid }{ϵ}_{ee}\mathrm{\mid }\lesssim 1$, $\mathrm{\mid }{ϵ}_{e\tau }\mathrm{\mid }\lesssim 0.2$.