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Full text not available from this repository. (Request a copy)Abstract
The exclusive electroproduction of pi(+) mesons was studied with the HERMES spectrometer at the DESY laboratory by scattering 27.6 GeV positron and electron beams off an internal hydrogen gas target. The virtual-photon cross sections were measured as a function of the Mandelstarn variable t and the squared four momentum -Q(2) of the exchanged virtual photon. A model calculation based on Generalized Parton Distributions is in fair agreement with the data at low values of It I if power corrections are included. A model calculation based on the Regge formalism gives a good description of the magnitude and the t and Q(2) dependences of the cross section. (c) 2007 Elsevier B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | GENERALIZED PARTON DISTRIBUTIONS; PION FORM-FACTOR; PHYSICS EVENT GENERATION; IMPACT PARAMETER SPACE; TO-LEADING ORDER; RESONANCE REGION; HIGH-ENERGY; SCATTERING; GEV2; QCD; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 10 Nov 2020 08:29 |
| Last Modified: | 10 Nov 2020 08:29 |
| URI: | https://pred.uni-regensburg.de/id/eprint/31496 |
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