NLO perturbative QCD predictions for gamma gamma -> M+ M- (M=pi,K)

Details NLO perturbative QCD predictions for gamma gamma -> M+ M- (M=pi,K) NLO perturbative QCD predictions for gamma gamma -> M+ M- (M=pi,K)

2006-07-06

arxiv.org/abs/hep-ph/0607069v2

Phys.Rev.Lett. 97 (2006) 142003

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 4 figures; parts rewritten, references and comments added, version as accepted for publication

Scientific paper

10.1103/PhysRevLett.97.142003

We report the first complete leading-twist next-to-leading-order perturbative QCD predictions for the two-photon exclusive channels gamma gamma -> M+ M- (M=pi,K) at large momentum transfer. The asymptotic distribution amplitude is utilized as a candidate form for the nonperturbative dynamical input. Comparison of the obtained results with the existing experimental data does not provide sufficiently clear evidence to support the applicability of the hard-scattering approach at currently accessible energies.

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