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FIZIKA B 13 (2004) 2, 523-530
 
GENERAL REDUCTION FORMALISM FOR NLO CALCULATIONS IN PQCD
GORAN DUPLAN�I� and BENE NI�I�
Theoretical Physics Division, Ru�er Bo�kovi� Institute, P.O. Box 180,
HR-10002 Zagreb, Croatia
Electronic addresses: [email protected] , [email protected]
Received 24 October 2003; Accepted 26 April 2004
Online 22 November 2004
We discuss a generally applicable and systematic method to represent an arbitrary
tensor one-loop Feynman integral, with N external lines and massless propagators, in terms
of a basic set of eight scalar Feynman integrals with 2, 3 and 4 external lines. To
demonstrate the practicality of the method, we calculate one of the one-loop Feynman
diagrams with 6 external lines, which contribute to the hard-scattering amplitude of the
process g g�p+p- at high momentum transfer in the context of pQCD.
PACS numbers: 11.10.Gh, 11.25.Db, 12.38.Bx
UDC 539.12
Keywords: exclusive processes, perturbative QCD, next-to-leading order
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