Revisiting the Scalar Leptoquark ($S_1$) Model with the Updated Leptonic Constraints

TL;DR

This paper revisits the scalar leptoquark ($S_1$) model at the TeV scale, analyzing its viability in explaining lepton anomalies with updated experimental constraints and discussing future tests via collider and low-energy experiments.

Contribution

It provides an updated analysis of the $S_1$ leptoquark model considering recent leptonic experimental data, assessing its ability to explain lepton anomalies within current bounds.

Findings

The model can simultaneously explain lepton magnetic and electric dipole moments.

Updated constraints significantly restrict the model's parameter space.

Future collider and low-energy experiments can test the model's predictions.

Abstract

The Standard Model, if extended to the energy scale of $\mathcal{O}(1)$ TeV, the known particle spectrum could be augmented with a scalar leptoquark. Within this minimally extended framework, explaining the anomalous magnetic moment and electric dipole moment simultaneously for the three lepton generations over a parameter space consistent with all the lepton flavor violating bounds is possible. Such a model can be tested or falsified through the collider search experiments and/or by probing the low-energy lepton phenomena. This work studies the current prospects of the model in the presence of recent experimental updates for the leptonic observables.