Kivel, Nikolai and Mankiewicz, L. (2001) Twist-3 contribution to the gamma* gamma ->pi pi amplitude in the Wandzura-Wilczek approximation. PHYSICAL REVIEW D, 63 (5): 054017. ISSN 0556-2821
Full text not available from this repository. (Request a copy)Abstract
We have calculated the Wandzura-Wilczek contribution to the twist-3 part of the gamma*gamma-->2 pi amplitude. It describes the interaction of the longitudinally polarized virtual photon with the real one, and it is suppressed by 1/Q where Q(2) is the virtuality of the gamma*, as compared to the twist-2 contribution. We have found that in the Wandzura-Wilczek approximation, factorization applies to the twist-3 amplitude.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | VIRTUAL COMPTON-SCATTERING; HARD EXCLUSIVE ELECTROPRODUCTION; NONFORWARD PARTON DISTRIBUTIONS; EVOLUTION-EQUATIONS; INSTANTON VACUUM; OPERATORS; NUCLEON; MESONS; QCD; PION; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Feb 2022 16:28 |
| Last Modified: | 14 Feb 2022 16:31 |
| URI: | https://pred.uni-regensburg.de/id/eprint/41728 |
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