Kivel, N. and Mankiewicz, L. (2001) Twist-4 photon helicity-flip amplitude in DVCS on a nucleon in the Wandzura-Wilczek approximation. EUROPEAN PHYSICAL JOURNAL C, 21 (4). pp. 621-629. ISSN 1434-6044
Full text not available from this repository.Abstract
We computed the twist-4 part of the photon spin-flip amplitude in deeply virtual Compton scattering on a nucleon in the Wandzura-Wilczek approximation, We found a factorizable contribution, which arises from photon scattering on quarks with non-zero angular momentum along the collision axis. As the genuine twist-2 amplitude arises at the NLO, for moderate virtualities of the hard photon, Q(2) less than or equal to 10 GeV2, a kinematical twist-4 correction can give a numerically important contribution to the photon helicity-flip amplitude.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | VIRTUAL COMPTON-SCATTERING; PARTON DISTRIBUTIONS; EVOLUTION-EQUATIONS; QUARK DISTRIBUTIONS; ART.; ELECTROPRODUCTION; FACTORIZATION; SPIN; QCD; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 11 Jan 2022 07:27 |
| Last Modified: | 11 Jan 2022 07:27 |
| URI: | https://pred.uni-regensburg.de/id/eprint/41286 |
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