Kivel, Nikolai and Mankiewicz, L. (2000) Power corrections to the process gamma gamma* -> pi pi in the light-cone sum rules approach. EUROPEAN PHYSICAL JOURNAL C, 18 (1). pp. 107-116. ISSN 1434-6044
Full text not available from this repository. (Request a copy)Abstract
We applied QCB light-cone sum rules to estimate power corrections to the helicity-conserving amplitude in the process gamma*gamma --> pi pi. We found that above Q(2) similar to 4 GeV2 power corrections are numerically small and the twist-2 part dominates. The amplitude can be reliably calculated in this region using models of 2 pi distribution amplitudes as input. We found that the magnitude of the NLO corrections depends rather strongly on the normalization of the gluonic distribution amplitude.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | VIRTUAL COMPTON-SCATTERING; FORM-FACTOR; PARTON DISTRIBUTIONS; NLO CORRECTIONS; QCD; EVOLUTION; FACTORIZATION; MOMENTUM; ORDER; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Mar 2022 07:51 |
| Last Modified: | 14 Mar 2022 07:51 |
| URI: | https://pred.uni-regensburg.de/id/eprint/41998 |
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