Power Corrections to QCD Sum Rules for Compton Scattering
High Energy Physics - Phenomenology
2009-10-22 v1
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 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.
Cite
@article{arxiv.hep-ph/9304210,
title = {Power Corrections to QCD Sum Rules for Compton Scattering},
author = {Claudio Coriano'},
journal= {arXiv preprint arXiv:hep-ph/9304210},
year = {2009}
}
Comments
24 pages in latex 5 figures not includes availiable upon request (email: [email protected]), ITP-US-93-3 preprint