Bottom partner B' and Zb production at the LHC

TL;DR

This paper investigates how a hypothetical bottom partner B' predicted by certain new physics models could influence Zb production at the LHC, potentially leading to detectable deviations from Standard Model predictions.

Contribution

It calculates the effects of the bottom partner B' on Zb production observables, considering experimental constraints, and predicts measurable corrections at the LHC.

Findings

B' can significantly alter Zb cross section and polarization asymmetry

Corrections could be observed in upcoming LHC experiments

Constraints from Z decay data limit B' parameter space

Abstract

Some new physics models, such as "beautiful mirrors" scenario, predict the existence of the bottom partner $B'$. Considering the constraints from the data for the $Z\rightarrow b\bar{b}$ branching ratio $R_{b}$ and the $FB$ asymmetry $A_{FB}^{b}$ on the relevant free parameters, we calculate the contributions of $B'$ to the cross section $\sigma(Zb)$ and the $Z$ polarization asymmetry $A_{Z}$ for $Zb$ production at the $LHC$. We find that the bottom partner $B'$ can generate significant corrections to $\sigma(Zb)$ and $A_{Z}$, which might be detected in near future.