Interplay between the $R_{D^{(*)}}$ anomaly and the LHC

TL;DR

This paper explores how the observed anomalies in B-meson decays could indicate new TeV-scale particles like charged Higgs or leptoquarks, and discusses their potential detection at the LHC.

Contribution

It analyzes the implications of the $R_{D^{(*)}}$ anomaly for new physics models, focusing on collider signatures of charged Higgs and leptoquarks.

Findings

Constraints on new physics from $R_{D^{(*)}}$ anomaly

Predicted collider signatures of charged Higgs and leptoquarks

Potential for LHC to test these new particles

Abstract

The current discrepancy in $R_{D^{(*)}}=BR(\bar{B} \to D^{(*)}\tau\bar{\nu})/BR(\bar{B}\to D^{(*)} \ell \bar{\nu})$ where $\ell=e,\,\mu$ may imply a know particle with the mass around the order of TeV. Therefore it is well motivated to test those scenarios at the large hadron collider. Thanks to the size of the discrepancy and the analysis based on the effective field theory, the variety of the possible new physics candidates is limited. We focus on the charged Higgs and leptoquark possibility and discuss the collider physics.