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arXiv · hep-ph/9304210

Power Corrections to QCD Sum Rules for Compton Scattering

Claudio Coriano'
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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.

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Claudio Coriano'. 1993-04-04. Power Corrections to QCD Sum Rules for Compton Scattering. https://doi.org/10.1016/0550-3213(93)90574-9

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