Diphoton production at the Tevatron in the quasi-multi-Regge-kinematic approach

Journal Article · Tue Dec 01 04:00:00 EST 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.80.114016· OSTI ID:21313471

Saleev, V A ^[1]

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1. II. Institut fuer Theoretische Physik, Universitaet Hamburg, Luruper Chaussee 149, 22761 Hamburg (Germany) and Samara State University, Academic Pavlov Street 1, 443011 Samara (Russian Federation)

We study the production of prompt diphotons in the central region of rapidity within the framework of the quasi-multi-Regge-kinematic approach applying the hypothesis of quark and gluon Reggeization. We describe accurately and without free parameters the experimental data which were obtained by the CDF Collaboration at the Tevatron collider. It is shown that the main contribution to the studied process is given by the direct fusion of two Reggeized gluons into a photon pair, which is described by the effective Reggeon-Reggeon to particle-particle vertex. The contribution from the annihilation of Reggeized quark-antiquark pair into a diphoton is also considered. At the stage of numerical calculations we use the Kimber-Martin-Ryskin prescription for unintegrated quark and gluon distribution functions, with the Martin-Roberts-Stirling-Thorne collinear-parton densities for a proton as input.

• OSTI ID: 21313471
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 11 Vol. 80; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
DENSITY
DISTRIBUTION FUNCTIONS
FERMILAB COLLIDER DETECTOR
FERMILAB TEVATRON
GLUONS
HYPOTHESIS
PARTICLE RAPIDITY
PHOTONS
PROTONS
QUARK-ANTIQUARK INTERACTIONS
QUARKS