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| Dokumentenart: | Artikel |
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| Titel eines Journals oder einer Zeitschrift: | Physical Review D |
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| Verlag: | AMER PHYSICAL SOC |
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| Ort der Veröffentlichung: | COLLEGE PK |
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| Band: | 65 |
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| Nummer des Zeitschriftenheftes oder des Kapitels: | 5 |
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| Datum: | 2002 |
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| Institutionen: | Physik > Institut für Theoretische Physik |
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| Identifikationsnummer: | | Wert | Typ |
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| 10.1103/PhysRevD.65.054010 | DOI |
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| Stichwörter / Keywords: | NONFORWARD PARTON DISTRIBUTIONS; EXCLUSIVE ELECTROPRODUCTION; VECTOR-MESONS; DIFFRACTIVE ELECTROPRODUCTION; NUCLEON; QUARK; QCD; POLARIZATION; PHOTONS; PIONS; |
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| Dewey-Dezimal-Klassifikation: | 500 Naturwissenschaften und Mathematik > 530 Physik |
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| Status: | Veröffentlicht |
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| Begutachtet: | Ja, diese Version wurde begutachtet |
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| An der Universität Regensburg entstanden: | Ja |
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| Dokumenten-ID: | 73138 |
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Zusammenfassung
We consider hard electroproduction of mesons at the twist-3 level and focus our attention on helicity flip amplitudes corresponding to the production of transversely polarized mesons by transverse photons. We demonstrate that the helicity-flip amplitude for the transversely polarized particles is closely related to the contributions of the matrix elements of the tensor gluon operator which can ...
Zusammenfassung
We consider hard electroproduction of mesons at the twist-3 level and focus our attention on helicity flip amplitudes corresponding to the production of transversely polarized mesons by transverse photons. We demonstrate that the helicity-flip amplitude for the transversely polarized particles is closely related to the contributions of the matrix elements of the tensor gluon operator which can serve as a pure gluonic probe of the hadrons. Using the standard factorization approach and the Wandzura-Wilczek approximation for the twist-3 matrix elements we find that such amplitudes do not have divergencies from the end point regions which appear in the other twist-3 amplitudes.
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