Kumericki, K. and Mueller, D. and Passek-Kumericki, K. and Schaefer, 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, 1873-2445
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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 xi greater than or similar to 5 x 10(-3) the modification of the scale dependence is also small. However, with decreasing it becomes moderate or even large. (C) 2007 Elsevier B.V All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | GENERALIZED PARTON DISTRIBUTIONS; EVOLUTION KERNELS; EXCLUSIVE ELECTROPRODUCTION; J/PSI MESONS; HERA; QCD; QUARK; REPRESENTATION; EXPANSION; deeply virtual Compton scattering; next-to-next-to-leading order corrections; conformal symmetry |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 10 Dec 2020 09:58 |
| Last Modified: | 10 Dec 2020 09:58 |
| URI: | https://pred.uni-regensburg.de/id/eprint/32774 |
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