Separation of soft and collinear singularities from one-loop N-point integrals

Details Separation of soft and collinear singularities from one-loop N-point integrals Separation of soft and collinear singularities from one-loop N-point integrals

2003-08-25

arxiv.org/abs/hep-ph/0308246v1

Nucl.Phys. B675 (2003) 447-466

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages latex

Scientific paper

10.1016/j.nuclphysb.2003.10.003

The soft and collinear singularities of general scalar and tensor one-loop N-point integrals are worked out explicitly. As a result a simple explicit formula is given that expresses the singular part in terms of 3-point integrals. Apart from predicting the singularities, this result can be used to transfer singular one-loop integrals from one regularization scheme to another or to subtract soft and collinear singularities from one-loop Feynman diagrams directly in momentum space.

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