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Modification of the ω-meson lifetime in nuclear matter

Kotulla, M. and Trnka, D. and Muehlich, P. and Anton, G. and Bacelar, J. C. S. and Bartholomy, O. and Bayadilov, D. and Beloglazov, Y. A. and Bogendoerfer, R. and Castelijns, R. and Crede, V. and Dutz, H. and Ehmanns, A. and Elsner, D. and Ewald, R. and Fabry, I. and Fuchs, M. and Essig, K. and Funke, Ch. and Gothe, R. and Gregor, R. and Gridnev, A. B. and Gutz, E. and Hoeffgen, S. and Hoffmeister, P. and Horn, I. and Hoessl, J. and Jaegle, I. and Junkersfeld, J. and Kalinowsky, H. and Klein, Frank and Klein, Fritz and Klempt, E. and Konrad, M. and Kopf, B. and Krusche, B. and Langheinrich, J. and Loehner, H. and Lopatin, I. V. and Lotz, J. and Lugert, S. and Menze, D. and Messchendorp, J. G. and Mertens, T. and Metag, V. and Mosel, U. and Nanova, M. and Novotny, R. and Ostrick, M. and Pant, L. M. and van Pee, H. and Pfeiffer, M. and Roy, A. and Radkov, A. and Schadmand, S. and Schmidt, Ch. and Schmieden, H. and Schoch, B. and Shende, S. and Suft, G. and Sumachev, V. V. and Szczepanek, T. and Suele, A. and Thoma, U. and Varma, R. and Walther, D. and Weinheimer, Ch. and Wendel, Ch.. (2008) Modification of the ω-meson lifetime in nuclear matter. Physical review letters, Vol. 100, H. 19 , 192302, 5 S..

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Official URL: http://edoc.unibas.ch/dok/A5261919

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Abstract

Information on hadron properties in the nuclear medium has been derived from the photoproduction of omega mesons on the nuclei C, Ca, Nb, and Pb using the Crystal Barrel/TAPS detector at the ELSA tagged photon facility in Bonn. The dependence of the omega-meson cross section on the nuclear mass number has been compared with three different types of models: a Glauber analysis, a Boltzmann-Uehling-Uhlenbeck analysis of the Giessen theory group, and a calculation by the Valencia theory group. In all three cases, the inelastic omega width is found to be 130-150 MeV/c(2) at normal nuclear matter density for an average 3-momentum of 1.1 GeV/c. In the rest frame of the omega meson, this inelastic omega width corresponds to a reduction of the omega lifetime by a factor approximate to 30. For the first time, the momentum dependent omega N cross section has been extracted from the experiment and is in the range of 70 mb.
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:American Physical Society
ISSN:0031-9007
Note:Variant title: Modification of the omega-meson lifetime in nuclear matter -- 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 13:53

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