Measurement of the differential γ+2b-jet cross section and the ratio σ(γ+2b-jets)/σ(γ+b-jet) in pp¯ collisions at s=1.96 TeV

V.M. Abazov, B. Abbott, B.S. Acharya, M. Adams, T. Adams, J.P. Agnew, G.D. Alexeev, G. Alkhazov, A. Alton, A. Askew, S. Atkins, K. Augsten (+352 others)
2014 Physics Letters B  
We present the first measurements of the differential cross section dσ/dp_T^γ for the production of an isolated photon in association with at least two b-quark jets. The measurements consider photons with rapidities |y^γ| < 1.0 and transverse momenta 30 < p_T^γ < 200 . The b-quark jets are required to have p_T^jet>15 GeV and | y^jet| < 1.5. The ratio of differential production cross sections for γ+2 b-jets to γ+b-jet as a function of p_T^γ is also presented. The results are based on the
more » ... ntiproton collision data at √(s)=1.96 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.
doi:10.1016/j.physletb.2014.09.007 fatcat:ieoni3uuejbjblh7q24shfbf6m