Looking for a vectorlike B quark at LHC using jet substructure

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.