Dokumentenart: | Artikel | ||||
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Titel eines Journals oder einer Zeitschrift: | Physics Letters B | ||||
Verlag: | ELSEVIER SCIENCE BV | ||||
Ort der Veröffentlichung: | AMSTERDAM | ||||
Band: | 659 | ||||
Nummer des Zeitschriftenheftes oder des Kapitels: | 3 | ||||
Seitenbereich: | S. 486-492 | ||||
Datum: | 2008 | ||||
Institutionen: | Physik > Institut für Theoretische Physik Physik > Institut für Theoretische Physik > Lehrstuhl Professor Schäfer > Arbeitsgruppe Andreas Schäfer | ||||
Identifikationsnummer: |
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Stichwörter / Keywords: | GENERALIZED PARTON DISTRIBUTIONS; PION FORM-FACTOR; PHYSICS EVENT GENERATION; IMPACT PARAMETER SPACE; TO-LEADING ORDER; RESONANCE REGION; HIGH-ENERGY; SCATTERING; GEV2; QCD; | ||||
Dewey-Dezimal-Klassifikation: | 500 Naturwissenschaften und Mathematik > 530 Physik | ||||
Status: | Veröffentlicht | ||||
Begutachtet: | Ja, diese Version wurde begutachtet | ||||
An der Universität Regensburg entstanden: | Ja | ||||
Dokumenten-ID: | 68450 |
Zusammenfassung
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 ...
Zusammenfassung
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.
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