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Near threshold photoproduction of η mesons from ⁴He

Hejny, V. and Achenbach, P. and Ahrens, J. and Beck, R. and Hall, S. J. and Kotulla, M. and Krusche, B. and Kuhr, V. and Leukel, R. and Metag, V. and Novotny, R. and de Leon, V. O. and Owens, R. O. and Rambo, F. and Schmidt, A. and Schumacher, M. and Siodlaczek, U. and Stroher, H. and Wissmann, F. and Weiss, J. and Wolf, M.. (1999) Near threshold photoproduction of η mesons from ⁴He. The European physical journal. A, Hadrons and nuclei, Vol. 6, H. 1. pp. 83-89.

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Official URL: http://edoc.unibas.ch/dok/A5261976

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Abstract

Photoproduction of eta mesons from He-4 has been measured for the first time, The experiment was performed at the Mains Microtron (MAMI) using the TAPS photon spectrometer and the Glasgow/Mainz tagged photon facility, eta mesons were identified in coincidence with recoil nucleons. Total and differential cross sections are presented in the photon energy range between threshold and 818 MeV. The exclusive data are used to determine the ratio of the elementary production cross sections on bound neutrons and protons. sigma(n)/sigma(p) = 0.68 +/- 0.02 +/- 0.09. In addition, upper limits for the total coherent cross section have been derived.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Hadronenphysik (Krusche)
UniBasel Contributors:Krusche, Bernd
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Springer-Verlag
ISSN:1434-6001
Note:Variant title: Near threshold photoproduction of eta mesons from 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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