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

0435521 - FZÚ 2015 RIV NL eng J - Journal Article
Abazov, V. M. - Abbott, B. - Acharya, B.S. - Kupčo, Alexander - Lokajíček, Miloš … Total 364 authors
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. Roč. 737, Oct (2014), s. 357-365. ISSN 0370-2693. E-ISSN 1873-2445
R&D Projects: GA MŠMT(CZ) LG12006
Institutional support: RVO:68378271
Keywords : Monte Carlo * photon * associated production * differential cross section * ratio * Batavia TEVATRON Coll * transverse momentum dependence * rapidity
Subject RIV: BF - Elementary Particles and High Energy Physics
Impact factor: 6.131, year: 2014

We present the first measurements of the differential cross section dσ/dpTγ 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 3015 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 pTγ 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.
Permanent Link: http://hdl.handle.net/11104/0239358