Two-loop corrections to Light-by-Light scattering in Supersymmetric QED

Details Two-loop corrections to Light-by-Light scattering in Supersymmetric QED Two-loop corrections to Light-by-Light scattering in Supersymmetric QED

2002-02-27

arxiv.org/abs/hep-ph/0202266v2

JHEP0205:060,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

27 pages, LaTeX with JHEP3.cls, 32 embedded postscript figures, small textual changes

Scientific paper

10.1088/1126-6708/2002/05/060

We use an n-dimensional projection method to calculate helicity amplitudes for photon-photon scattering up to the two-loop level, for massless particles inside the loop. We confirm the recent standard model results found by Bern et al using another calculational method. We further apply the method to N=1 and N=2 supersymmetric QED. As predicted by the supersymmetric Ward identity, two of the independent amplitudes vanish. The remaining amplitude simplifies as the number of supersymmetries increases. For N=2 SUSY QED, only contributions of weight 4 remain.

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