New physics at nuSTORM

TL;DR

This paper explores how nuSTORM can be used to investigate new physics scenarios like sterile neutrinos and non-unitarity in neutrino mixing, highlighting its potential in constraining relevant parameters through charged and neutral current events.

Contribution

It demonstrates the effectiveness of nuSTORM in probing sterile neutrino parameters and non-unitarity effects, providing new insights into neutrino physics beyond the standard model.

Findings

Neutral current events enhance constraints on sterile neutrino mixing angles.

nuSTORM can effectively constrain non-unitarity parameters in neutrino mixing.

Combined analysis of charged and neutral current events improves sensitivity.

Abstract

In this work we investigate the usefulness of nuSTORM as a probe of two new-physics scenarios which are sterile neutrinos and non-unitarity of the neutrino mixing matrix. For the sterile neutrino we show the importance of the neutral current events when combined with the charged current events to constrain the effective mixing angle, $\theta_{\mu \mu}$, and the sterile mixing angles $\theta_{14}$ and $\theta_{24}$. We also study the role nuSTORM will play in the study of neutrino oscillation physics if the three generation neutrino mixing matrix is non-unitary. In this context we elucidate the role of nuSTORM, considering both charged current and neutral current events, in constraining the various non-unitarity parameters such as $\alpha_{11}$, $|\alpha_{21}|$ and $\alpha_{22}$.