Naslov
Fitting GPDs to DVCS Data: At Next-to-Leading-Order and Beyond

Autori
Passek-Kumerički, Kornelija

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, neobjavljeni rad, znanstveni

Skup
GPD 2008: Workshop on Hard Exclusive Reactions

Mjesto i datum
Trento, Italija, 09.06.2008. - 13.06.2008

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Međunarodna recenzija

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

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 also discuss the physical content of GPDs that is accessible in DVCS and is, to leading order, contained in the value on the cross-over trajectory.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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