Fitting DVCS at NLO and beyond (CROSBI ID 531785)
Prilog sa skupa u zborniku | izvorni znanstveni rad
Podaci o odgovornosti
Kumerički, Krešimir ; Müller, Dieter ; Passek- Kumerički, Kornelija
engleski
Fitting DVCS at NLO and beyond
We outline the twist-two analysis of deeply virtual Compton scattering (DVCS)within the conformal partial wave expansion of the amplitude, represented as a Mellin--Barnes integral. The complete next-to-leading order results, including evolution, are obtained in the MS and a conformal factorization scheme. Within the latter, exploiting conformal symmetry, the radiative corrections are evaluated up to next-to-next-to- leading order. Using a new proposed parameterization for GPDs, we study the convergence of perturbation theory and demonstrate for H1 and ZEUS measurements that our formalism is suitable for a fitting procedure of DVCS observables. We comment on a recent claim of a breakdown of collinear factorization and show that a Regge-inspired Q^2 scaling law is ruled out by small x_Bj DVCS data.
deeply virtual Compton scattering; generalized parton distributions; fitting procedure; conformal symmetry; next-next-to-leading order corrections
Predavač: Kornelija Passek-Kumerički. [arXiv:0710.5649 [hep-ph]]
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Podaci o prilogu
17-25.
2007.
objavljeno
Podaci o matičnoj publikaciji
Proceedings of the 12th International Conference on Elastic and Diffractive Scattering : Forward Physics and QCD
Bartels, J. ; Borras, K. ; Diehl, M. ; Jung, H.
Hamburg: Verlag Deutsches Elektronen-Synchrotron
Podaci o skupu
International Conference on Elastic and Diffractive Scattering: Forward Physics and QCD (12 ; 2007)
pozvano predavanje
21.05.2007-25.05.2007
Hamburg, Njemačka