Scalar leptoquark and vector-like quark extended models as the explanation of the muon $g-2$ anomaly: bottom partner chiral enhancement case

TL;DR

This paper explores scalar leptoquark and vector-like quark models with bottom quark chiral enhancement to explain the muon g-2 anomaly, proposing new models and search channels based on bottom and bottom partner mixing.

Contribution

It introduces two new models with bottom quark chiral enhancement from bottom and bottom partner mixing, expanding the theoretical framework for muon g-2 explanations.

Findings

Identified two new models with bottom quark chiral enhancement.

Proposed new search channels for leptoquark and VLQ based on muon g-2 constraints.

Analyzed the impact of bottom and bottom partner mixing on model viability.

Abstract

Leptoquark (LQ) models are well motivated solutions to the $(g-2)_{\mu}$ anomaly. In the minimal LQ models, only specific representations can lead to the chiral enhancements. For the scalar LQs, the $R_2$ and $S_1$ can lead to the top quark chiral enhancement. For the vector LQs, the $V_2$ and $U_1$ can lead to the bottom quark chiral enhancement. When we consider the LQ and vector-like quark (VLQ) simultaneously, there can be more scenarios. In our previous work, we considered the scalar LQ and VLQ extended models with up-type quark chiral enhancement. Here, we study the scalar LQ and VLQ extended models with down-type quark chiral enhancement. We find two new models with $B$ quark chiral enhancement, which originate from the bottom and bottom partner mixing. Then, we propose new LQ and VLQ search channels under the constraints of $(g-2)_{\mu}$.