A recursive approach to the reduction of tensor Feynman integrals

Details A recursive approach to the reduction of tensor Feynman integrals A recursive approach to the reduction of tensor Feynman integrals

2010-02-02

arxiv.org/abs/1002.0529v1

PoS(RADCOR2009)033

Physics

High Energy Physics

High Energy Physics - Phenomenology

RADCOR 2009 - 9th International Symposium on Radiative Corrections (Applications of Quantum Field Theory to Phenomenology), Oc

Scientific paper

We describe a new, convenient, recursive tensor integral reduction scheme for one-loop $n$-point Feynman integrals. The reduction is based on the algebraic Davydychev-Tarasov formalism where the tensors are represented by scalars with shifted dimensions and indices, and then expressed by conventional scalars with generalized recurrence relations. The scheme is worked out explicitly for up to $n=6$ external legs and for tensor ranks $R\leq n$. The tensors are represented by scalar one- to four-point functions in $d$ dimensions. For the evaluation of them, the Fortran code for the tensor reductions has to be linked with a package like QCDloop or LoopTools/FF. Typical numerical results are presented.

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