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.
Highlights
Over the last three decades, the Standard Model (SM) has been vindicated to an unprecedented degree of accuracy by several experiments, taken singly or in conjunction. These include, but are not limited to, the electroweak precision tests [1], the measurement of the top mass [2] culminating with the discovery of the Higgs particle [3,4]
The analysis presented so far corresponds to a particular choice of the jet radius R used for jet reconstruction, namely R 1⁄4 0.5
In the event of multijet events, we find that the probability of the true b–daughter of the decaying B not leading to J1 is much less than 1%, thereby establishing the robustness of the identification
Summary
Over the last three decades, the Standard Model (SM) has been vindicated to an unprecedented degree of accuracy by several experiments, taken singly or in conjunction. We are concerned with a VLQ that, among other things, is useful in ameliorating the longstanding tension between the global fits to electroweak precision tests [1] and AbFB The latter, taken in conjunction with the Z → bb branching ratio and the forward-backward asymmetry for the charm-quark requires a substantial new physics effect in the b-sector [51].
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