publication . Preprint . Article . 2005

Loop amplitudes in pure Yang-Mills from generalised unitarity

Andreas Brandhuber; Simon McNamara; Bill Spence; Gabriele Travaglini;
Open Access English
  • Published: 09 Jun 2005
Abstract
We show how generalised unitarity cuts in D = 4 - 2 epsilon dimensions can be used to calculate efficiently complete one-loop scattering amplitudes in non-supersymmetric Yang-Mills theory. This approach naturally generates the rational terms in the amplitudes, as well as the cut-constructible parts. We test the validity of our method by re-deriving the one-loop ++++, -+++, --++, -+-+ and +++++ gluon scattering amplitudes using generalised quadruple cuts and triple cuts in D dimensions.
Subjects
free text keywords: High Energy Physics - Theory, High Energy Physics - Phenomenology, Nuclear and High Energy Physics, Quantum electrodynamics, Amplitude, Particle physics, Scattering amplitude, Gluon, Unitarity, Gauge symmetry, Yang–Mills existence and mass gap, Physics
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