FIZIKA B 13 (2004)  2, 523-530

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GENERAL REDUCTION FORMALISM FOR NLO CALCULATIONS IN PQCD

GORAN  DUPLANČIĆ and BENE NIŽIĆ

Theoretical Physics Division, Ruđer Bošković Institute, P.O. Box 180, HR-10002 Zagreb, Croatia
Electronic addresses: gorand@thphys.irb.hr , nizic@thphys.irb.hr

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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