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Constraining N*(1535) parameters from the eta photoproduction

Krusche, B. and Mukhopadhyay, N. C. and Zhang, J. F. and Benmerrouche, M.. (1997) Constraining N*(1535) parameters from the eta photoproduction. Physics letters. B, Vol. 397, H. 3-4. pp. 171-176.

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Official URL: http://edoc.unibas.ch/dok/A5261982

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Abstract

Current broad uncertainties on the position, total width and eta branching ratio for N* (1535), reported in the 1996 Particle Data Tables, can be narrowed down considerably utilizing the precise Mainz and Bonn data on eta photoproduction. We obtain here a precise determination of the total width from such a study, fixing other parameters. We find the set of N* (1535) parameters, suggested by the Particle Data Group (PDG), to be inconsistent with the experimental results from eta-photoproduction. In particular, values for the photon helicity coupling and/or the eta branching ratio of the resonance, required in order to fit the data, are larger than the PDG values. This result has important consequences for the interpretation of the resonance in the framework of different models, including some exotic possibilities.
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:North-Holland
ISSN:0370-2693
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:22 Mar 2012 14:26
Deposited On:22 Mar 2012 13:54

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