Deeply virtual Compton scattering beyond next-to-leading order: The flavor singlet case

Kumerički, Krešimir and Müller, D. and Passek-Kumerički, K. and Schäfer, A. (2007) Deeply virtual Compton scattering beyond next-to-leading order: The flavor singlet case. Physics Letters B, 648 (2-3). pp. 186-194. ISSN 0370-2693

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Abstract

We study radiative corrections to deeply virtual Compton scattering in the kinematics of HERA collider experiments to next-to-leading and next-to-next-to-leading order. In the latter case the radiative corrections are evaluated in a special scheme that allows us to employ the predictive power of conformal symmetry. As observed before, the size of next-to-leading order corrections strongly depends on the gluonic input, as gluons start to contribute at this order. Beyond next-to-leading order we find, in contrast, that the corrections for an input scale of few GeV2 are small enough to justify the uses of perturbation theory. For ξ≳5×10−3 the modification of the scale dependence is also small. However, with decreasing ξ it becomes moderate or even large.

Item Type: Article
Keywords: deeply virtual compton scattering, next-to-next-to-leading order corrections, conformal symmetry
Date: 2007
Subjects: NATURAL SCIENCES > Physics > Physics of Elementary Particles and Fields
Divisions: Faculty of Science > Department of Physics
Project code: 098-0982930-2864, 119-0982930-1016
Publisher: Elsevier
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 11 May 2014 05:49
Last Modified: 11 May 2014 05:49
URI: http://digre.pmf.unizg.hr/id/eprint/1007

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