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Measurement of the differential gamma+2b-jet cross section and the ration sigma(gamma+2b-jets)/sigma(gamma plus b-jet) in p(p)over-bar collisions at root s=1.96 TeV
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2014 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 737, 357-365 p.Article in journal (Refereed) Published
Abstract [en]

We present the first measurements of the differential cross section d sigma/dp(T)(gamma) for the production of an isolated photon in association with at least two b-quark jets. The measurements consider photons with rapidities vertical bar y(gamma)vertical bar < 1.0 and transverse momenta 30 < p(T)(gamma) < 200 GeV. The b-quark jets are required to have p(T)(jet) > 15 GeVand vertical bar y(jet)vertical bar < 1.5. The ratio of differential production cross sections for gamma + 2 b-jets to gamma + b-jet as a function of p(T)(gamma) is also presented. The results are based on the proton-antiproton collision data at root 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 k(T)- factorization approach and those from the sherpa and pythia Monte Carlo event generators.

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2014. Vol. 737, 357-365 p.
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Physical Sciences
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URN: urn:nbn:se:uu:diva-236542DOI: 10.1016/j.physletb.2014.09.007ISI: 000342757700063OAI: oai:DiVA.org:uu-236542DiVA: diva2:766340
Available from: 2014-11-26 Created: 2014-11-19 Last updated: 2017-12-05Bibliographically approved

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Buszello, Claus P.

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