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Measurement of the combined rapidity and p(T) dependence of dijet azimuthal decorrelations in p(p)over-bar collisions at root s=1.96 TeV
  • Centro Brasileiro de Pesquisas Físicas (CBPF)
  • Universidade do Estado do Rio de Janeiro (UERJ)
  • Universidade Federal do ABC (UFABC)
  • Univ Sci & Technol China
  • Universidad de los Andes
  • Charles Univ Prague
  • Czech Tech Univ
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  • Univ San Francisco Quito
  • Univ Clermont Ferrand
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  • Tata Inst Fundamental Res
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  • Institute for Theoretical and Experimental Physics (ITEP)
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  • Petersburg Nucl Phys Inst
  • IFAE
  • Uppsala Univ
  • University of Lancaster
  • Univ London Imperial Coll Sci Technol & Med
  • University of Manchester
  • University of Arizona
  • University of California, Riverside (UCR)
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  • Fermilab Natl Accelerator Lab
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  • Univ Autonoma Sinaloa
  • Universidade Estadual Paulista (UNESP)
  • DOE (USA)
  • NSF (USA)
  • CEA, (France)
  • CNRS/IN2P3, (France)
  • MON (Russia)
  • NRC KI (Russia)
  • RFBR (Russia)
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
  • Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)
  • Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
  • Fundação para o Desenvolvimento da UNESP (FUNDUNESP)
  • DAE (India)
  • DST (India)
  • Colciencias (Colombia)
  • CONACyT (Mexico)
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  • FOM (The Netherlands)
  • STFC (United Kingdom)
  • Royal Society (United Kingdom)
  • MSMT (Czech Republic)
  • GACR (Czech Republic)
  • BMBF (Germany)
  • DFG (Germany)
  • SFI (Ireland)
  • Swedish Research Council (Sweden)
  • CAS (China)
  • CNSF (China)
We present the first combined measurement of the rapidity and transverse momentum dependence of dijet azimuthal decorrelations, using the recently proposed quantity R-Delta phi. The variable R-Delta phi measures the fraction of the inclusive dijet events in which the azimuthal separation of the two jets with the highest transverse momenta is less than a specified value of the parameter Delta phi(max). The quantity R-Delta phi is measured in p (p) over bar collisions at root s = 1.96 TeV, as a function of the dijet rapidity interval, the total scalar transverse momentum, and Delta phi(max). The measurement uses an event sample corresponding to an integrated luminosity of 0.7 fb(-1) collected with the DO detector at the Fermilab Tevatron Collider. The results are compared to predictions of a perturbative QCD calculation at next-to-leading order in the strong coupling with corrections for non-perturbative effects. The theory predictions describe the data well, except in the kinematic region of large dijet rapidity intervals and small Delta phi(max). (C) 2013 Elsevier B.V. All rights reserved.
Issue Date: 
Physics Letters B. Amsterdam: Elsevier Science Bv, v. 721, n. 4-5, p. 212-219, 2013.
Time Duration: 
Elsevier B.V.
Access Rights: 
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Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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