On baryon-antibaryon coupling to two photons

Details On baryon-antibaryon coupling to two photons On baryon-antibaryon coupling to two photons

2002-10-21

arxiv.org/abs/hep-ph/0210277v3

Phys.Lett. B553 (2003) 211-216

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 2 eps figures, minor modifications made, version to appear on Phys. Lett. B

Scientific paper

10.1016/S0370-2693(02)03203-3

We discuss recent claims that $p\bar{p} \to \gamma \gamma$ may be described by a generalized parton picture. We propose that quark-hadron duality provides a justification for the effective dominance of the "handbag" diagram assumed in recent literature, and that handbag diagrams may dominate phenomena in kinematic regions far more extensive than that might be expected from pQCD alone.

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