In this talk, we present our work regarding the robustness of the determination of the Dirac CP-phase at several long-baseline experiments: ESSnuSB, T2HKK, and DUNE. The precise determination of the leptonic CP phase is one of the major goals for future neutrino long-baseline experiments. We use the non-standard neutrino interaction (NSI) formalism as a framework. We found that complementarity among ESSnuSB and DUNE experiments enhances the robustness of the determination of the CP-phase, even in the presence of matter NSI.

In this talk, we present our work regarding the robustness of the determination of the Dirac CP-phase at several long-baseline experiments: ESSnuSB, T2HKK, and DUNE. The precise determination of the leptonic CP phase is one of the major goals for future neutrino long-baseline experiments. We use the non-standard neutrino interaction (NSI) formalism as a framework. We found that complementarity among ESSnuSB and DUNE experiments enhances the robustness of the determination of the CP-phase, even in the presence of matter NSI.