QCD Sum Rules and Compton Scattering
arXiv:hep-ph/9301274 · doi:10.1016/0550-3213(93)90556-5
Abstract
We extend QCD sum rule analysis to moderate energy fixed angle Compton scattering. In this kinematic region there is a strong similarity to the sum rule treatment of electromagnetic form factors, although the four-point amplitude requires a modification of the Borel transform. To illustrate our method, we derive the sum rules for helicity amplitudes in pion Compton scattering and estimate their large- behavior in the local duality approximation.
30 pages in Latex, 6 figures not included, available upon request (send email to: [email protected]), ITP-SB-92-70, CEBAF-TH-92-32
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