Numerical Evaluation of Six-Photon Amplitudes

Details Numerical Evaluation of Six-Photon Amplitudes Numerical Evaluation of Six-Photon Amplitudes

2007-04-10

arxiv.org/abs/0704.1271v2

JHEP 0707:085,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, 3 figures. Version accepted for publication in JHEP

Scientific paper

10.1088/1126-6708/2007/07/085

We apply the recently proposed amplitude reduction at the integrand level method, to the computation of the scattering process 2 photons -> 4 photons, including the case of a massive fermion loop. We also present several improvements of the method, including a general strategy to reconstruct the rational part of any one-loop amplitude and the treatment of vanishing Gram-determinants.

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