Probing a simplified, $W^{\prime}$ model of $R(D^{(\ast)})$ anomalies using $b$-tags, $\tau$ leptons and missing energy

TL;DR

This paper investigates the LHC's ability to detect a $W'$ boson linked to $R(D^{(*)})$ anomalies, emphasizing the role of $b$-tags, $ au$ leptons, and missing energy to improve background rejection and constrain couplings.

Contribution

It introduces a novel analysis strategy using $b$-tags and $ au$ leptons to enhance sensitivity to a simplified $W'$ model related to $R(D^{(*)})$ anomalies at the LHC.

Findings

Enhanced background rejection with $b$-tagging compared to $ au$-only analysis.

Prospective limits on $W'$ couplings consistent with $R(D^{(*)})$ anomalies.

Feasible mass range for $W'$ detection between 200-1000 GeV.

Abstract

We study the LHC sensitivity to a $W'$ produced via bottom and charm quarks and decaying to $\tau$ flavor leptons in the mass range 200-1000 GeV. We show that the extra $b$ quarks necessitated by the production mechanism can improve the background rejection compared to an inclusive analysis relying solely on $\tau$-tagging and $E_{T}^{\text{miss}}$. We present prospective limits on the couplings and compare them to the best fit to the $R(D^{(\ast)})$ anomalies in $B$ meson decays.