Single production of vectorlike $B$ quarks at the CLIC

TL;DR

This paper investigates the potential to detect vectorlike bottom quarks at the future CLIC collider through single production processes, analyzing cross sections, backgrounds, and discovery prospects at 3 TeV energy.

Contribution

It provides the first detailed study of single vectorlike B quark production at CLIC, including cross section calculations, background analysis, and sensitivity projections for future collider parameters.

Findings

Exclusion limits on coupling strength and mass at 95% CL.

Discovery prospects at 5σ for certain parameter ranges.

Simulation results show feasible detection at 3 TeV with 5 ab$^{-1}$.

Abstract

The vector-like quarks are predicted in many new physics scenarios beyond the Standard Model~(SM) and could be seen potential signatures of new physics at the TeV energy scale. In this work, we study single production of exotic singlet and doublet vectorlike bottom quarks (VLQ-$B$) at future Compact Linear Collider~(CLIC) via the process $e^{+}e^{-}\to B\bar{b}$ with the decay channel $B\to bZ$ and two types of modes: $Z\to \ell^{+}\ell^{-}$ and $Z\to \nu\bar{\nu}$. We calculate the cross sections of signal and relevant SM backgrounds. After a fast simulation of the signal and background events, the exclusion limit at 95\% confidence level and $5\sigma$ discovery prospects on the parameters (the coupling strength $\kappa_{B}$ and the VLQ-$B$ mass) have been, respectively, presented at the future CLIC with centre of mass energy $\sqrt{s}=3$ TeV and integrated luminosity of 5~ab$^{-1}$.