# Combined explanation of the B-anomalies

## TL;DR

This paper analyzes four tree-level new physics models—leptoquarks S3, U3, U1, and a triplet vector boson—to explain B-meson anomalies, concluding most are excluded by experimental constraints, leaving U1 as a viable candidate.

## Contribution

It provides a comprehensive analysis of these models with general couplings, demonstrating the exclusion of S3, U3, and the vector boson, and emphasizing the importance of LFV and collider constraints for U1.

## Key findings

- S3 and U3 leptoquarks are excluded.
- Triplet vector boson is excluded by collider and tree-level constraints.
- U1 leptoquark remains a viable explanation for anomalies.

## Abstract

There are four models of tree-level new physics (NP) that can potentially explain the $b\to s \mu^+ \mu^-$ and $b \to c\ell \bar \nu$ anomalies simultaneously. They are the S3, U3, and U1 leptoquarks and a standard-model-like triplet vector boson (VB). In this talk, I describe an analysis of these models with general couplings. We find that even in this most general case S3 and U3 are excluded. For the U1 model, I discuss the importance of the constraints from lepton-flavor-violating(LFV) processes. As for the VB model, it is shown to be excluded by the additional tree level constraints and LHC bounds on high-mass resonant dimuon pairs. This conclusion is reached without any assumptions about the NP couplings.