Next-to-Leading-Order Perturbative-QCD Predictions for {gamma}{gamma}{yields}M{sup +}M{sup -} (M={pi},K)
Journal Article
·
· Physical Review Letters
- Theoretical Physics Division, Rudjer Boskovic Institute, P.O. Box 180, HR-10002 Zagreb (Croatia)
We report the first complete leading-twist next-to-leading-order perturbative-QCD predictions for the two-photon exclusive channels {gamma}{gamma}{yields}M{sup +}M{sup -} (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.
- OSTI ID:
- 20860909
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 14 Vol. 97; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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