NONLINEAR PHENOMENA IN COMPLEX SYSTEMS
An Interdisciplinary Journal

2009, Vol.12, No.4, pp.365-369


Prompt Photon and Electroweak Gauge Boson Production with Off-Shell Gluon Fusion.
A.V.Lipatov, S.P.Baranov, and N.P.Zotov

In the framework of the kT -factorization approach, we study the production of prompt photons and electroweak gauge bosons in high energy hadronic collisions at modern colliders. Our consideration is based on the amplitude for the production of a single photon or boson associated with a quark pair in the fusion of two off-shell gluons. The quark component is taken into account separately using the quark-gluon scaterring and quark-antiquark annihilation QCD subprocesses. Special attention is put on the contributions from the quarks involved into the earlier steps of the evolution cascade. Using the Kimber-Martin-Ryskin formalism, we simulate this component and demonstrate that it plays an important role at both the Tevatron and LHC energies. Our theoretical results are compared with recent experimental data taken by the D and CDF collaborations at the Tevatron.
Key words: small-x physics, kT -factorization approach

Full text:  Acrobat PDF  (541KB)  



ContentsJournal Home Page

Copyright © Nonlinear Phenomena in Complex Systems. Last updated: February 15, 2010