Strong Final State Interactions in gamma.gamma --> W+W-

Details Strong Final State Interactions in gamma.gamma --> W+W- Strong Final State Interactions in gamma.gamma --> W+W-

2002-11-12

arxiv.org/abs/hep-ph/0211179v1

Phys.Lett. B552 (2003) 57-65

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages including figures

Scientific paper

10.1016/S0370-2693(02)03102-7

We study the effects of a possible strong final state interaction among longitudinal W's in gamma.gamma --> W+W-. The relevant partial wave amplitudes are modified by an Omn\`es function approximated by a Breit-Wigner form factor. We study the fractional cross section f_{00} = \sigma_{LL}/\sigma_{Total} with both W's longitudinally polarised, in the presence of a J = 2 resonance (M = 2.5 TeV, Width = 500 GeV) or a J = 0 resonance (M = 1 TeV, Width = 1 TeV), whose parameters are scaled up from the f_2 and \sigma resonances in the \pi\pi system. We also examine the effects of final state interaction in the case of polarised photons (J_z = 0 or J_z = 2), and the impact on the Drell-Hearn-Gerasimov sum rule.

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