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Towards a fitting procedure to deeply virtual meson production - the next-to-leading order case

Müller, Dieter; Lautenschlager, Tobias; Passek-Kumerički, Kornelija; Schäfer, Andreas (2014) Towards a fitting procedure to deeply virtual meson production - the next-to-leading order case. Nuclear Physics B, 884 . pp. 438-546. ISSN 0550-3213

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Based on the collinear factorization approach, we present a comprehensive perturbative next-to- leading (NLO) analysis of deeply virtual meson production (DVMP). Our representation in conformal Mellin space can serve as basis for a global fitting procedure to access generalized parton distributions from experimental measurements of DVMP and deeply virtual Compton scattering (DVCS). We introduce a rather general formalism for the evaluation of conformal moments that can be developed further beyond the considered order. We also confirm previous diagrammatical findings in the pure singlet quark channel. Finally, we use the analytic properties of the hard scattering amplitudes to estimate qualitatively the size of radiative corrections and illustrate these considerations with some numerical examples. The results suggest that global NLO GPD fits, including both DVMP and DVCS data, could be more stable than often feared.

Item Type: Article
Uncontrolled Keywords: perturbative QCD; generalized parton distributions (GPD); deeply virtual meson production; next-to-leading order
Subjects: NATURAL SCIENCES > Physics
Divisions: Theoretical Physics Division
Project titleProject leaderProject codeProject type
Fundamentalne interakcije u fizici elementarnih čestica i kozmologijiGoran Duplančić098-0982930-2864MZOS
Depositing User: Kornelija Passek-Kumerički
Date Deposited: 28 Jul 2016 13:25
DOI: 10.1016/j.nuclphysb.2014.04.012

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