Asymmetric heavy-quark hadroproduction at LHCb: Predictions and applications

Abstract

We present a phenomenological analysis of asymmetric bottom- and charm-quark production within the LHCb acceptance relevant for $pp$ collisions at $\sqrt{s}=13\mathrm{TeV}$. Predictions are provided for both anti-$k_t$ bottom- and charm-jet pairs, which are kept differentially with respect to the invariant mass of the jet pair. It is quantified how data in this region can provide sensitivity to the couplings of the $Z$ boson to heavy quarks, and we investigate what precision is needed to compete with LEP. We also discuss how asymmetry and rate measurements can provide constraints on a particular class of new-physics models, which contains gauge bosons with small/moderate couplings to light/heavy quarks and masses of the order of $100\mathrm{GeV}$. Predictions are obtained including all relevant QCD and QED/weak contributions up to next-to-leading order, which have been implemented in a Fortran code which allows to directly compute the asymmetric cross sections. We provide all relevant analytic formulas for our computations.

36 pages, 17 figures

References in corpus (12)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• LHAPDF6: parton density access in the LHC precision era
• OneLOop: for the evaluation of one-loop scalar functions
• How bright is the proton? A precise determination of the photon parton distribution function
• The Photon Content of the Proton
• Emerging Jets
• Electroweak effects in top-quark pair production at Hadron Colliders
• Weak interaction corrections to hadronic top quark pair production
• NLO QED contributions to top-pair production at hadron collider
• Photon-initiated processes at high mass
• Predictions from Heavy New Physics Interpretation of the Top Forward-Backward Asymmetry
• Bottom Pair Production and Search for Heavy Resonances

Cited by in corpus (3)

• Heavy quark jet production near threshold
• Production of forward heavy-flavour dijets at the LHCb within $k_T$-factorization approach
• Measurements of charmed meson and antimeson production asymmetries at $\sqrt{s}=13.6$ TeV