Looking for a vectorlike B quark at LHC using jet substructure

TL;DR

This paper explores the potential to discover vectorlike B quarks at the LHC using jet substructure techniques, focusing on single production and hadronic decay channels, to improve detection prospects.

Contribution

It demonstrates that jet substructure observables can significantly enhance the detection of vectorlike B quarks in fully hadronic decay channels at the LHC.

Findings

Potential to exclude B quark masses up to 1.8-2.2 TeV at 13 TeV LHC with 300 fb$^{-1}$

Jet substructure improves detection sensitivity in hadronic decay channels

Single production channels are promising for discovering vectorlike B quarks

Abstract

Vectorlike quarks have been shown to resolve certain long-standing discrepancies pertaining to the bottom sector. We investigate, here, the prospects of identifying the existence of a topless vectorlike doublet $(B,~Y)$, as is preferred by the electroweak precision measurements. Concentrating on single production, $viz.$ $B \bar b$ with $B \to b + Z/H$ subsequently, we find that the fully hadronic decay-channel is susceptible to discovery provided jet substructure observables are used. At the 13 TeV LHC with an integrated luminosity of 300 fb$^{-1}$, a modest value of the chromomagnetic transition moments allows for the exclusion of $M \lesssim 1.8(2.2)$ TeV in the $Z$ and $H$ channels respectively.