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Title: 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

We present the first measurements of the differential cross section dσ/dpγΤ 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 < pγΤ < 200 GeV. The b-quark jets are required to have pjetΤ > 15 GeVand |γjet| < 1.5. The ratio of differential production cross sections for γ + 2 b-jets to γ +b-jet as a function of pγΤ 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. As a result, 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 kΤ-factorization approach and those from the sherpa and pythia Monte Carlo event generators.
Authors:
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  1. et al.
Publication Date:
Report Number(s):
BNL-107162-2014-JA; FERMILAB-PUB-14-135-E
Journal ID: ISSN 0370-2693; KA1101021
Grant/Contract Number:
AC02-98CH10886; AC02-07CH11359
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 737; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
D0 Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1214413
Alternate Identifier(s):
OSTI ID: 1165708; OSTI ID: 1226277