Towards a fitting procedure for deeply virtual Compton scattering at next-to-leading order and beyond

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dc.creatorKumericki, K.
dc.creatorMüller, D.
dc.creatorPassek-Kumericki, K.
dc.date2007-03-16
dc.date2007-12-07
dc.date.accessioned2026-07-07T11:59:12Z
dc.date.available2026-07-07T11:59:12Z
dc.descriptionCombining dispersion and operator product expansion techniques, we derive the conformal partial wave decomposition of the virtual Compton scattering amplitude in terms of complex conformal spin to twist-two accuracy. The perturbation theory predictions for the deeply virtual Compton scattering (DVCS) amplitude are presented in next-to-leading order for both conformal and modified minimal subtraction scheme. Within a conformal subtraction scheme, where we exploit predictive power of conformal symmetry, the radiative corrections are presented up to next-to-next-to-leading order accuracy. Here, because of the trace anomaly, the mixing of conformal moments of generalized parton distributions (GPD) at the three-loop level remains unknown. Within a new proposed parameterization for GPDs, we then study the convergence of perturbation theory and demonstrate that our formalism is suitable for a fitting procedure of DVCS observables.
dc.descriptionLaTeX, 100 pages, 16 figures, 5 tables; Secs. 5.1 and 5.2 revised, minor corrections, version to be published in Nucl.Phys.B
dc.identifierhttps://arxiv.org/abs/hep-ph/0703179
dc.identifierhttp://arxiv.org/abs/hep-ph/0703179
dc.identifierNucl.Phys.B794:244-323,2008
dc.identifierdoi:10.1016/j.nuclphysb.2007.10.029
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/206484
dc.subjectHigh Energy Physics - Phenomenology
dc.titleTowards a fitting procedure for deeply virtual Compton scattering at next-to-leading order and beyond
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