Conference paper

General reduction formalism for NLO calculations in pQCD

Goran Duplančić ; Theoretical Physics Division, Ruđer Bošković Institute, P.O. Box 180, HR-10002 Zagreb, Croatia
Bene Nižić ; Theoretical Physics Division, Ruđer Bošković Institute, P.O. Box 180, HR-10002 Zagreb, Croatia

Abstract

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 hardscattering amplitude of the process γ γ → π + π − at high momentum transfer in the context of pQCD.

Keywords

exclusive processes; perturbative QCD; next-to-leading order

Hrčak ID:

305871

URI

https://hrcak.srce.hr/305871

Publication date:

1.6.2004.

Article data in other languages: croatian

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