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

Journal Article · Sat May 01 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.094002· OSTI ID:21409926

Assadsolimani, Mohammad; Becker, Sebastian; Weinzierl, Stefan ^[1]

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1. Institut fuer Physik, Universitaet Mainz, D-55099 Mainz (Germany)

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 counterterm for the infrared singularities and can be used as an ingredient for the numerical calculation of one-loop amplitudes.

• OSTI ID: 21409926
• Journal Information: Physical Review. D, Particles Fields, Vol. 81, Issue 9; Other Information: DOI: 10.1103/PhysRevD.81.094002; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
APPROXIMATIONS
COMPUTERIZED SIMULATION
QUANTUM CHROMODYNAMICS
SINGULARITY
CALCULATION METHODS
FIELD THEORIES
QUANTUM FIELD THEORY
SIMULATION