Naslov
Fitting DVCS at NLO and beyond

Autori
Kumerički, Krešimir ; Müller, Dieter ; Passek- Kumerički, Kornelija

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
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, 2007, 17-25

Skup
International Conference on Elastic and Diffractive Scattering: Forward Physics and QCD (12 ; 2007)

Mjesto i datum
Hamburg, Njemačka, 21.05.2007. - 25.05.2007

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
deeply virtual Compton scattering; generalized parton distributions; fitting procedure; conformal symmetry; next-next-to-leading order corrections;
(deeply virtual Compton scattering; generalized parton distributions; fitting procedure; conformal symmetry; next-next-to-leading order corrections)

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Napomena
Predavač: Kornelija Passek-Kumerički. [arXiv:0710.5649 [hep-ph]]

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