# Probing new physics with atmospheric neutrinos at KM3NeT-ORCA

## TL;DR

This paper discusses how the KM3NeT-ORCA detector can use atmospheric neutrinos to explore new physics phenomena like sterile neutrinos and non-standard interactions, potentially improving current constraints significantly.

## Contribution

It presents the potential of ORCA to probe new physics models through atmospheric neutrino oscillation studies, highlighting its sensitivity improvements.

## Key findings

- ORCA can probe sterile neutrino parameters with an order of magnitude better sensitivity.
- Matter effects in neutrino oscillations can reveal new physics beyond the Standard Model.
- Preliminary results indicate significant potential for detecting non-standard interactions.

## Abstract

We present the prospects of ORCA searches for new physics phenomena using atmospheric neutrinos. Focus is given to exploiting the impact of strong matter effects on the oscillation of atmospheric neutrinos in light of expanded models, such as sterile neutrinos and non-standard interactions. In the presence of light sterile neutrinos that mix with active neutrinos, additional resonances and suppressions may occur at different energies. One may also use neutrino oscillations to probe the properties of the coherent forward scattering which may be altered by new interactions beyond the Standard Model. Preliminary studies show that ORCA would be able to probe some parameters of these models with sensitivity up to one order of magnitude better than current constraints.