Braun, V. M. and Manashov, A. N. and Moch, S. and Schoenleber, J. (2020) Two-loop coefficient function for DVCS: vector contributions. JOURNAL OF HIGH ENERGY PHYSICS (9): 117. ISSN 1029-8479,
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Using the approach based on conformal symmetry we calculate the two-loop coefficient function for the vector flavor-nonsinglet contribution to deeply-virtual Compton scattering (DVCS). The analytic expression for the coefficient function in momentum fraction space is presented in the MS<mml:mo stretchy="true"><overbar></mml:mover> scheme. The corresponding next-to-next-to-leading order correction to the Compton form factor H for a simple model of the generalized parton distribution appears to be rather large: a factor two smaller than the next-to-leading order correction, approximately similar to 10% of the tree level result in the bulk of the kinematic range, for Q(2) = 4 GeV2.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | VIRTUAL COMPTON-SCATTERING; TO-LEADING ORDER; DEEP-INELASTIC SCATTERING; ANOMALOUS DIMENSIONS; CONFORMAL-INVARIANCE; EVOLUTION KERNELS; QCD CORRECTIONS; OPERATORS; CONSTRAINTS; SYMMETRY; Conformal Field Theory; Renormalization Group |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics Physics > Institute of Theroretical Physics > Chair Professor Braun Physics > Institute of Theroretical Physics > Chair Professor Braun > Group Vladimir Braun |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 11 Mar 2021 10:23 |
| Last Modified: | 11 Mar 2021 10:23 |
| URI: | https://pred.uni-regensburg.de/id/eprint/43779 |
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