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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

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  • D0 Collaboration
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<mark>Journal publication date</mark>7/10/2014
<mark>Journal</mark>Physics Letters B
Volume737
Number of pages9
Pages (from-to)357-365
<mark>State</mark>Published
<mark>Original language</mark>English

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.

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Open Access funded by SCOAP³ - Sponsoring Consortium for Open Access Publishing in Particle Physics Under a Creative Commons license