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http://acervodigital.unesp.br/handle/11449/24069- Title:
- Measurement of the differential cross section for the production of an isolated photon with associated jet in p(p)over-bar collisions at root s=1.96 TeV
- Abazov, V. M.
- Abbott, B.
- Abolins, M.
- Acharya, B. S.
- Adams, M.
- Adams, T.
- Aguilo, E.
- Ahn, S. H.
- Ahsan, M.
- Alexeev, G. D.
- Alkhazov, G.
- Alton, A.
- Alverson, G.
- Alves, G. A.
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- Andrieu, B.
- Anzelc, M. S.
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- Arnoud, Y.
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- Asman, B.
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- Atramentov, O.
- Avila, C.
- Badaud, F.
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- Bagby, L.
- Baldin, B.
- Bandurin, D. V.
- Banerjee, P.
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- Barberis, E.
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- Baringer, P.
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- Bartlett, J. F.
- Bassler, U.
- Bauer, D.
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- Neustroev, P.
- Nilsen, H.
- Nogima, H.
- Novaes, Sérgio Ferraz
- Nunnemanny, T.
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- Kansas State University
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- Department of Energy (DOE) and National Science Foundation (NSF) - USA
- Institut national de physique nucléaire et de physique des particules (IN2P3/CNRS)
- Rosatom State Atomic Energy Corporation (ROSATOM)
- Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
- Department of Science and Technology (DST) - India
- Colciencias (Colombia)
- Consejo Nacional de Ciencia y Tecnología (CONACYT)
- Korea Science and Engineering Foundation (KOSEF)
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
- Foundation for Fundamental Research on Matter (FOM)
- Science and Technology Facilities Council (STFC)
- Czech Science Foundation (GACR)
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Bundesministerium für Bildung und Forschung (BMBF)
- Science Foundation Ireland (SFI)
- Swedish Research Council
- CAS and CNSF (China)
- Alexander von Humboldt Foundation
- Marie Curie Program
- 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.
- 11-Sep-2008
- Physics Letters B. Amsterdam: Elsevier B.V., v. 666, n. 5, p. 435-445, 2008.
- 435-445
- Elsevier B.V.
- http://dx.doi.org/10.1016/j.physletb.2008.06.076
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/24069
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