Non-Standard Interaction of atmospheric neutrino in future experiments

TL;DR

This paper explores how future large-scale neutrino experiments can significantly improve constraints on non-standard neutrino interactions during atmospheric neutrino propagation, enhancing our understanding of neutrino physics.

Contribution

It demonstrates the potential of upcoming experiments like DUNE, HK, KNO, and ORCA to greatly tighten bounds on NSI parameters and analyze CP-violation effects.

Findings

Ten-year data can improve NSI bounds by orders of magnitude.

DUNE's tau neutrino detection enhances sensitivity to NSI.

Experiments can exclude no CP violation hypothesis at various confidence levels.

Abstract

We show the prospects of probing neutral-current non-standard 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 $\nu_\tau$ appearance with the $\nu_\mu$ disappearance. Based on our simulated results, the ten years of data taking of the atmospheric neutrinos can enormously improve the bounds on the NSI parameters $\varepsilon_{\mu \tau}, | \varepsilon_{\mu \mu} - \varepsilon_{\tau \tau} |$, $\varepsilon_{e \mu }$, $\varepsilon_{e \tau}$ and $| \varepsilon_{\mu \mu} - \varepsilon_{e e} |$ by a couple of orders of magnitudes. In addition, we show the expected correlations between the CP-violation phase $\delta_{CP}$ and the NSI parameters $\varepsilon_{e\mu}, \varepsilon_{e\tau}$, and $|\varepsilon_{ee} - \varepsilon_{\mu \mu}|$ and confirm the potentials of DUNE, HK, KNO (combined with HK) in excluding the "No CP violation" hypothesis at 1$\sigma$, 2$\sigma$, and 3$\sigma$, respectively.