Effective QCD coupling and power corrections to photon-photon scattering

Details Effective QCD coupling and power corrections to photon-photon scattering Effective QCD coupling and power corrections to photon-photon scattering

1997-10-06

arxiv.org/abs/hep-ph/9710256v1

Phys.Rev.Lett. 80 (1998) 3198-3201

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 2 figures, Latex

Scientific paper

10.1103/PhysRevLett.80.3198

The scattering of two off-shell photons is an infrared-safe process in QCD. For photon virtualities in the range of a few GeV, accessible at LEPII, power-behaved contributions to the total cross section may become non-negligible. Based on a dispersion relation for the running coupling, we discuss these contributions and calculate the coefficients of the leading power correction for transversely polarized and longitudinally polarized virtual photons.

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