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Transversity in exclusive electroproduction of pseudoscalar mesons

Name: Transversity in exclusive electroproduction of pseudoscalar mesons
Creator: Peter Kroll
Keywords: High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), FOS: Physical sciences

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type 01 Oct 2012Embargo end date: 01 Jan 2012Publisher:Sissa MedialabJournal:Proceedings of Sixth International Conference on Quarks and Nuclear Physics — PoS(QNP2012)

Authors: Peter Kroll;

doi: 10.22323/1.157.0045 , 10.48550/arxiv.1206.6215

arXiv: http://arxiv.org/abs/1206.6215

Transversity in exclusive electroproduction of pseudoscalar mesons

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Abstract

In this talk it is reported on an analysis of hard exclusive electroproduction of pseudoscalar mesons within the handbag approach. It is argued that recent measurements of pion electroproduction performed by HERMES and CLAS clearly indicate the occurence of strong contributions from transversely polarized photons. Within the handbag approach such transitions are described by the transversity GPDs accompanied by twist-3 pion wave functions. It is shown that this handbag approach leads to results on cross sections and single-spin asymmetries in fair agreement with experiment. The surprising result is that the pi0 cross section is dominated by gamma_T -> pion transitions. Predictions for other pseudoscalar meson channels are also discussed.

6 pages, 8 figures, using PoS.cls talk presented at QNP2012, Paris (2012)

Related Organizations

École Polytechnique
France
University of Wuppertal
Germany

Keywords

High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), FOS: Physical sciences

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