Near-threshold photoproduction of η-mesons from the deuteron

Krusche, B. and Ahrens, J. and Annand, J. R. M. and Anton, G. and Beck, R. and Fuchs, M. and Gabler, A. R. and Harter, F. and Hejny, V. and Kellie, J. D. and Mcgeorge, J. C. and Metag, V. and Peise, J. and Robiglandau, M. and Schubert, A. and Stroher, H.. (1995) Near-threshold photoproduction of η-mesons from the deuteron. Physics letters. B, Vol. 358, H. 1-2. pp. 40-46.

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Official URL: http://edoc.unibas.ch/dok/A5261993

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The first measurement of incoherent eta-photoproduction from the deuteron in the threshold region is reported. The experiment was carried out at the MAMI accelerator with the TAPS spectrometer. Total and differential inclusive cross sections have been obtained between 627 and 790 MeV. it is found that the reaction is completely dominated by the incoherent part. An upper limit for coherent eta-photoproduction on the deuteron is deduced, which is substantially lower than the result from an earlier measurement. The incoherent cross section is reproduced in a participant-spectator approach under the assumption of an energy-independent ratio between the neutron and proton cross sections. Best agreement is found for the ratio sigma(n)/sigma(p) approximate to 2/3. The implications for the isospin components of the electromagnetic excitation of the S-11(1535) resonance are discussed.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Hadronenphysik (Krusche)
UniBasel Contributors:Krusche, Bernd
Item Type:Article, refereed
Article Subtype:Research Article
Note:Variant title: Near-threshold photoproduction of eta-mesons from the deuteron -- Publication type according to Uni Basel Research Database: Journal article
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Last Modified:14 Sep 2012 06:44
Deposited On:22 Mar 2012 14:16

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