Leptoquark and vectorlike quark extended models as the explanation of $(g-2)_{\mu}$ anomaly

TL;DR

This paper explores extended leptoquark and vectorlike quark models, demonstrating their potential to explain the muon g-2 anomaly through new contributions and decay channels, expanding upon minimal models.

Contribution

It introduces extended models with additional particles and interactions, showing new viable explanations for the muon g-2 anomaly beyond minimal frameworks.

Findings

S3 leptoquark can explain the anomaly with triplet inclusion

New decay channel Tμ for leptoquarks identified

Extended models provide alternative solutions to minimal models

Abstract

In minimal leptoquark (LQ) models, the $R_2$ and $S_1$ can be the solution to the $(g-2)_{\mu}$ anomaly because of the chiral enhancements. Here, we study the LQ and vectorlike quark (VLQ) extended models. In the one LQ and one VLQ extended models, the $(g-2)_{\mu}$ can receive the contributions from top and top partner $T$ because of the $t-T$ mixing. Besides the traditional $R_2$ and $S_1$ representations, we find that the $S_3$ LQ can also explain the anomaly when including the $(X,T,B)_{L,R}$ triplet at the same time. Moreover, we find that the LQ has the new decay channel $T\mu$ in these models.