Search for single production of vectorlike $B$-quarks at the LHC

TL;DR

This paper investigates the potential to discover vectorlike B-quarks at the LHC through resonant production via b-gluon fusion, analyzing signals in the tW decay mode with simulated data.

Contribution

It introduces a model-independent search strategy for vectorlike B-quarks via chromomagnetic interactions at the LHC, focusing on resonant production and decay channels.

Findings

Excluded regions at 2σ confidence level for certain parameters.

Discovery reach at 5σ significance for specific mass and coupling values.

Analysis based on simulated signal and background events at 14 TeV LHC.

Abstract

New vectorlike quarks have been proposed in many scenarios of new physics beyond the Standard Model, which address the hierarchy problem and may be potentially discovered at the Large Hadron Collider~(LHC). Based on a model-independent framework, we propose to search for the vectorlike $B$-quark~(VLQ-$B$) and focus on resonant production via $b$-gluon fusion through chromomagnetic interactions. We then explore the possible signals of the VLQ-$B$ through the $B\to tW$ decay mode at the 14 TeV LHC. After a rapid simulation of signal and background events, the $2\sigma$ excluded regions and the $5\sigma$ discovery reach in the parameter plane of $\kappa_{B}-M_B$ are obtained at the LHC with an integrated luminosity of 300~(3000) fb$^{-1}$ in the dilepton final states.