# Searches for new physics at the Hyper-Kamiokande experiment

## TL;DR

Hyper-Kamiokande is a promising neutrino experiment capable of detecting new physics phenomena like sterile neutrinos and non-standard interactions, especially when combined with DUNE data, expanding the search for physics beyond the standard model.

## Contribution

This paper evaluates Hyper-Kamiokande's potential to discover new physics beyond the standard neutrino model, highlighting its comparable sensitivity to DUNE and the benefits of combined data analysis.

## Key findings

- Hyper-K can explore new parameter space for sterile neutrinos.
- Combining Hyper-K and DUNE data improves sensitivity and resolves degeneracies.
- Hyper-K has capabilities comparable to DUNE in new physics searches.

## Abstract

We investigate the ability of the upcoming Hyper-Kamiokande (Hyper-K) neutrino experiment to detect new physics phenomena beyond the standard, three-massive-neutrinos paradigm; namely the existence of a fourth, sterile neutrino or weaker-than-weak, non-standard neutrino interactions. With both beam-based neutrinos from the Japan Proton Accelerator Research Complex (J-PARC) and atmospheric neutrinos, Hyper-K is capable of exploring new ranges of parameter space in these new-physics scenarios. We find that Hyper-K has comparable capability to the upcoming Deep Underground Neutrino Experiment (DUNE), and that combining both beam- and atmospheric-based data can clear up degeneracies in the parameter spaces of interest. We also comment on the potential improvement in searches for new physics if a combined analysis were performed using Hyper-K and DUNE data.