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Threshold enhancement in η photoproduction from ²H and ⁴He

Hejny, V. and Weiss, J. and Achenbach, P. and Ahrens, J. and Annand, J. R. M. and Beck, R. and Kotulla, M. and Krusche, B. and Kuhr, V. and Leukel, R. and MacGregor, I. J. D. and Metag, V. and Novotny, R. and de Leon, V. O. and Rambo, F. and Schmidt, A. and Schumacher, M. and Siodlaczek, U. and Stroher, H. and Wissmann, F. and Wolf, M.. (2002) Threshold enhancement in η photoproduction from ²H and ⁴He. The European physical journal. A, Hadrons and nuclei, Vol. 13, H. 4. pp. 493-499.

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Official URL: http://edoc.unibas.ch/dok/A5261958

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Abstract

The photoproduction of eta-mesons from H-2 and He-4 has been studied for energies close to the production thresholds. The experiments were carried out with the tagged photon beam of the Mainz MAMI accelerator. The eta-mesons were detected via their two photon decays with the electromagnetic calorimeter TAPS. Total cross-sections, angular and momentum distributions of the eta-mesons have been determined for both reactions. The total cross-sections in the threshold region show a large enhancement over the predictions of a participant-spectator model, indicating significant final-state interaction effects. The results are compared to recent model calculations taking into account nucleon-nucleon and nucleon-eta final-state interaction effects on different levels of sophistication.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Hadronenphysik (Krusche)
UniBasel Contributors:Krusche, Bernd
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Springer-Verlag
ISSN:1434-6001
Note:Variant title: Threshold enhancement in eta photoproduction from H-2 and He-4 -- Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:26
Deposited On:22 Mar 2012 13:55

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