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Photoproduction of η-mesons off nuclei for Eγ≤2.2GeV

Mertens, T. and Jaegle, I. and Muehlich, P. and Bacelar, J. C. S. and Bantes, B. and Bartholomy, O. and Bayadilov, D. E. and Beck, R. and Beloglazov, Y. A. and Castelijns, R. and Crede, V. and Dutz, H. and Ehmanns, A. and Elsner, D. and Essig, K. and Ewald, R. and Fabry, I. and Fornet-Ponse, K. and Fuchs, M. and Funke, C. and Gothe, R. and Gregor, R. and Gridnev, A. B. and Gutz, E. and Hoeffgen, S. and Hoffmeister, P. and Horn, I. and Junkersfeld, J. and Kalinowsky, H. and Kammer, S. and Kleber, V. and Klein, Frank and Klein, Friedrich and Klempt, E. and Konrad, M. and Kotulla, M. and Krusche, B. and Lang, M. and Langheinrich, J. and Loehner, H. and Lopatin, I. V. and Lotz, J. and Lugert, S. and Menze, D. and Messchendorp, J. G. and Metag, V. and Morales, C. and Mosel, U. and Nanova, M. and Novinski, D. V. and Novotny, R. and Ostrick, M. and Pant, L. M. and van Pee, H. and Pfeiffer, M. and Radkov, A. K. and Roy, A. and Schadmand, S. and Schmidt, C. and Schmieden, H. and Schoch, B. and Shende, S. V. and Sokhoyan, V. and Suele, A. and Sumachev, V. V. and Szczepanek, T. and Thoma, U. and Trnka, D. and Varma, R. and Walther, D. and Weinheimer, C. and Wendel, C.. (2008) Photoproduction of η-mesons off nuclei for Eγ≤2.2GeV. The European physical journal. A, Hadrons and nuclei, Vol. 38, H. 2. pp. 195-207.

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Official URL: http://edoc.unibas.ch/dok/A5261914

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Abstract

The photoproduction of eta-mesons off C-12, Ca-40, Nb-93, and Pb-nat nuclei has been measured with a tagged photon beam with energies between 0.6 and 2.2 GeV. The experiment was performed at the Bonn ELSA accelerator with the combined setup of the Crystal Barrel and TAPS calorimeters. It aimed at the in-medium properties of the S-11(1535) nucleon resonance and the study of the absorption properties of nuclear matter for eta-mesons. Careful consideration was given to contributions from eta pi final states and secondary production mechanisms of eta-mesons, e.g. from inelastic pi N reactions of intermediate pions. The analysis of the mass number scaling shows that the nuclear absorption cross-section sigma(N eta) for eta-mesons is constant over a wide range of the eta momentum. The comparison of the excitation functions to data off the deuteron and to calculations in the framework of a BUU model show no unexplained in-medium modi. cations of the S-11(1535).
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: Photoproduction of eta-mesons off nuclei for E-gamma ≤2.2GeV -- 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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