Vector leptoquark $U_3$ and CP violation at T2K, NOvA experiments

TL;DR

This paper investigates how a vector leptoquark can induce non-standard neutrino interactions, potentially explaining discrepancies in CP violation measurements between T2K and NOvA experiments.

Contribution

It introduces a model where a vector leptoquark causes significant NSI effects, providing a novel explanation for recent experimental CP violation discrepancies.

Findings

Vector leptoquark induces large NSI parameter $\varepsilon_{e \mu}$.

NSI effects can reconcile T2K and NOvA CP violation results.

Model offers new insights into neutrino oscillation anomalies.

Abstract

In the current epoch of neutrino physics, many experiments are aiming for precision measurements of oscillation parameters. Thus, various new physics scenarios which alter the neutrino oscillation probabilities in matter deserve careful investigation. In this context, we study the effect of a vector leptoquark which induces non-standard neutrino interactions (NSI) that modify the oscillation probabilities of neutrinos in matter. We show that such interactions provide a relatively large value of NSI parameter $\varepsilon_{e \mu}$. Considering this NSI parameter, we successfully explain the recent discrepancy between the observed $\delta_{CP}$ results of T2K and NOvA.