UNSPECIFIED (2014) Measurement of the differential γ+2 b-jet cross section and the ratio σ(γ+2 b-jets)/σ(γ+b-jet) in pp¯ collisions at s√=1.96 TeV. Physics Letters B, 737. pp. 357-365. ISSN 0370-2693
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Abstract
We present the first measurements of the differential cross section dσ/dpγT for the production of an isolated photon in association with at least two b-quark jets. The measurements consider photons with rapidities |yγ|<1.0 and transverse momenta 30<pγT<200~\GeV. The b-quark jets are required to have pjetT>15 GeV and |yjet|<1.5. The ratio of differential production cross sections for γ+2 b-jets to γ+b-jet as a function of pγT is also presented. The results are based on the proton-antiproton collision data at s√=1.96~\TeV collected with the D0 detector at the Fermilab Tevatron Collider. The measured cross sections and their ratios are compared to the next-to-leading order perturbative QCD calculations as well as predictions based on the kT-factorization approach and those from the SHERPA and PYTHIA Monte Carlo event generators.