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RESEARCH PRODUCT

A simple formula for the infrared singular part of the integrand of one-loop QCD amplitudes

Stefan WeinzierlSebastian BeckerMohammad Assadsolimani

subject

Quantum chromodynamicsPhysicsNuclear and High Energy PhysicsInfraredHigh Energy Physics::LatticeFOS: Physical sciencesLoop (topology)High Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)Classical mechanicsAmplitudeSimple (abstract algebra)Gravitational singularityQuantum field theoryMathematical physics

description

We show that a well-known simple formula for the explicit infrared poles of one-loop QCD amplitudes has a corresponding simple counterpart in unintegrated form. The unintegrated formula approximates the integrand of one-loop QCD amplitudes in all soft and collinear singular regions. It thus defines a local counter-term for the infrared singularities and can be used as an ingredient for the numerical calculation of one-loop amplitudes.

yearjournalcountryeditionlanguage
2010-05-03
10.1103/physrevd.81.094002http://arxiv.org/abs/0912.1680