Neutrino electromagnetic properties in a Leptoquark model

TL;DR

This paper investigates the neutrino magnetic dipole moment within a leptoquark-extended Standard Model, analyzing parameter space constraints and potential explanations for recent experimental anomalies.

Contribution

It provides an analytical calculation of the one-loop contribution of a scalar leptoquark to the neutrino magnetic moment and explores parameter space consistent with recent experimental constraints.

Findings

Identifies parameter regions compatible with muon g-2 and B decay constraints.

Shows potential to explain XENON collaboration anomaly.

Provides analytical expressions for leptoquark contributions.

Abstract

The neutrino magnetic dipole moment is studied in a simple extension of the SM augmented with a scalar Leptoquark with quantum numbers $(\bar{\boldsymbol{3}},\boldsymbol{1},1/3)$. In order to reach a sizeable neutrino magnetic moment, we include in the framework the contribution of right-handed neutrinos and analytical result for the one-loop contribution of a scalar LQ is presented. The allowed parameter space is found through recent restrictions on the muon $(g-2)$, the $\tau \to \mu \gamma$ and the $B_c \to \tau^- \bar \nu$ decay. It is shown that exist a region of the parameter space where the recent anomaly reported by the XENON collaboration can be accommodated.