Nonstandard interaction of atmospheric neutrino in future experiments

We show the prospects of probing neutral-current nonstandard interaction (NSI) in the propagation of atmospheric neutrinos in future large-volume neutrino experiments including DUNE, HK, KNO, and ORCA. For DUNE, we utilize its ability of identifying the tau neutrino event and combine the ντ appearance with the νμ disappearance. Based on our simulated results, the 10 years of data taking of the atmospheric neutrinos can enormously improve the bounds on the NSI parameters μτ,|μμ-ττ|, eμ, eτ and |μμ-ee| by a couple of orders of magnitudes. In addition, we show the expected correlations between the CP-violation phase δCP and the NSI parameters eμ,eτ, and |ee-μμ| and confirm the potentials of DUNE, HK, KNO (combined with HK) in excluding the "No CP violation"hypothesis at 1σ, 2σ, and 3σ, respectively.