期刊
PHYSICS LETTERS B
卷 666, 期 5, 页码 435-445出版社
ELSEVIER
DOI: 10.1016/j.physletb.2008.06.076
关键词
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资金
- DOE and NSF (USA)
- CEA and CNRS/IN2P3 (France)
- FASI, Rosatom and RFBR (Russia)
- CAPES, CNPq, FAPERJ, FAPESP and FUNDUNESP (Brazil)
- DAE and DST (India)
- Colciencias (Colombia)
- CONACyT (Mexico)
- KRF and KOSEF (Korea)
- CONICET and UBACyT (Argentina)
- FOM (The Netherlands)
- Science and Technology Facilities Council (United Kingdom)
- MSMT and GACR (Czech Republic)
- CRC Program, CFI, NSERC and WestGrid Project (Canada)
- BMBF and DFG (Germany)
- SFI (Ireland)
- The Swedish Research Council (Sweden)
- CAS and CNSF (China)
- Alexander von Humboldt Foundation
- Marie Curie Program
- STFC [PP/E000487/1, ST/F00754X/1, ST/F007418/1] Funding Source: UKRI
- Science and Technology Facilities Council [PP/E000487/1, ST/F007418/1, ST/F00754X/1, PP/D004284/1] Funding Source: researchfish
The process p (p) over bar -> gamma + jet + X is studied using 1.0 fb(-1) of data collected by the DO detector at the Fermilab Tevatron p (p) over bar collider at a center-of-mass energy root s = 1.96 TeV. Photons are reconstructed in the central rapidity region vertical bar y(gamma)vertical bar < 1.0 with transverse momenta in the range 30 < p(T)(gamma) < 400 GeV while jets are reconstructed in either the central vertical bar y(jet)vertical bar < 0.8 or forward 1.5 < vertical bar y(jet)vertical bar < 2.5 rapidity intervals with P-T(jet) > 15 GeV. The differential cross section d(3 sigma)/dp(T)(gamma) dy(gamma) dy(jet) is measured as a function of p(T)(gamma) in four regions, differing by the relative orientations of the photon and the jet in rapidity. Ratios between the differential cross sections in each region are also presented. Next-to-leading order QCD predictions using different parameterizations of parton distribution functions and theoretical scale choices are compared to the data. The predictions do not simultaneously describe the measured normalization and p(T)(gamma) dependence of the cross section in the four measured regions. Published by Elsevier B.V.
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