Power Corrections to QCD Sum Rules for Compton Scattering

Abstract

We extend previous work on sum rules for the invariant amplitudes of pion Compton scattering by deriving a complete lowest order perturbative spectral function - and its leading non perturbative power corr ections - for a specific combination of the two helicities $(H_1+H_2)$ of this process. Using some properties of a modified version of the Borel transform, we develop a method of calculation of the gluonic corrections which can be easily extended to other similar reactions, such as proton Compton scattering. A preliminary comparison of the new sum rule with the pion form factor sum rule is made.

24 pages in latex 5 figures not includes availiable upon request (email: [email protected]), ITP-US-93-3 preprint

References in corpus (2)

• QCD Sum Rule and Perturbative QCD Approaches to Pion Compton Scattering
• QCD Sum Rules and Compton Scattering

Cited by in corpus (5)

• The Transition to Perturbative QCD in Compton Scattering
• Stability Analysis of Sum Rules for Compton Scattering
• Transition to perturbative QCD in two-photon collisions
• Dispersive Methods and QCD Sum Rules for γγCollisions
• Nonlocal Condensate Model for QCD Sum Rules