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Associated production of prompt photons and heavy quarks in off-shell gluon–gluon fusion

  • S.P. Baranov
  • A.V. LipatovEmail author
  • N.P. Zotov
Regular Article - Theoretical Physics

Abstract

In the framework of the kT-factorization approach, we study the production of prompt photons associated with heavy (charm and beauty) quarks in hadron–hadron collisions at high energies. Our consideration is based on the amplitude for the production of a single photon associated with a quark pair in the fusion of two off-shell gluons. The total and differential cross sections are presented and the conservative error analysis is performed. Two sets of unintegrated gluon distributions in the proton have been used in numerical calculation: the one obtained from Ciafaloni–Catani–Fiorani–Marchesini evolution equation and the other from Kimber–Martin–Ryskin prescription. The theoretical results are compared with recent experimental data taken by the CDF collaboration at the Fermilab Tevatron. Our analysis extends to specific angular correlations between the produced prompt photons and muons originating from semileptonic decays of the final charmed or beauty quarks. We point out the importance of such observables, which can serve as a crucial test for the unintegrated gluon densities in a proton. Finally, we extrapolate the theoretical predictions to the CERN LHC energies.

Keywords

Heavy Quark Gluon Fusion Semileptonic Decay Gluon Density Associate Production 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag / Società Italiana di Fisica 2008

Authors and Affiliations

  1. 1.P.N. Lebedev Physics InstituteMoscowRussia
  2. 2.D.V. Skobeltsyn Institute of Nuclear PhysicsM.V. Lomonosov Moscow State UniversityMoscowRussia

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