Beauty-quark and charm-quark pair production asymmetries at LHCb
Abstract
The LHCb collaboration has recently performed a first measurement of the angular production asymmetry in the distribution of beauty quarks and anti-quarks at a hadron collider. We calculate the corresponding standard model prediction for this asymmetry at fixed-order in perturbation theory. Our results show good agreement with the data, which is provided differentially for three bins in the invariant mass of the b b system. We also present similar predictions for both beauty-quark and charm-quark final states within the LHCb acceptance for a collision energy of s = 13 \, TeV. We finally point out that a measurement of the ratio of the b b and c c cross sections may be useful for experimentally validating charm-tagging efficiencies.
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