QCD Sum Rule and Perturbative QCD Approaches to Pion Compton Scattering

Details QCD Sum Rule and Perturbative QCD Approaches to Pion Compton Scattering QCD Sum Rule and Perturbative QCD Approaches to Pion Compton Scattering

1993-02-08

arxiv.org/abs/hep-ph/9302231v1

Phys.Lett.B309:409-415,1993

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages 4 figures not included availiable upon request (send email to: claudio@max.physics.sunysb.edu), IP-ASTP-18-92

Scientific paper

10.1016/0370-2693(93)90954-G

We compare two approaches to the description of pion Compton scattering at moderate momentum transfer, one being based on local duality QCD sum rules for the invariant amplitudes of the process, which have been derived recently, and the other on the modified factorization formula with Sudakov effects included. We find that perturbative QCD predictions are dominant over those from QCD sum rules only for the scattering angle greater than 90$^o$.

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