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Photoproduction of η mesons off protons for 0.75  GeV>Eγ>3  GeV

Crede, V. and Bartholomy, O. and Anisovich, A. V. and Anton, G. and Bantes, R. and Beloglazov, Y. and Bogendorfer, R. and Castelijns, R. and Ehmanns, A. and Ernst, J. and Fabry, I. and Flemming, H. and Fosel, A. and Freiesleben, H. and Fuchs, M. and Funke, C. and Gothe, R. and Gridnev, A. and Gutz, E. and Hoffgen, S. K. and Horn, I. and Hossl, J. and Joosten, R. and Junkersfeld, J. and Kalinowsky, H. and Klein, F. and Klempt, E. and Koch, H. and Konrad, M. and Kopf, B. and Krusche, B. and Langheinrich, J. and Lohner, H. and Lopatin, I. and Lotz, J. and Matthay, H. and Menze, D. and Messchendorp, J. and Morales, C. and Novinski, D. and Ostrick, M. and van Pee, H. and Radkov, A. and Reinnarth, J. and Sarantsev, A. V. and Schadmand, S. and Schmidt, C. and Schmieden, H. and Schoch, B. and Suft, G. and Sumachev, V. and Szczepanek, T. and Thoma, U. and Walther, D. and Weinheimer, C.. (2005) Photoproduction of η mesons off protons for 0.75  GeV>Eγ>3  GeV. Physical review letters, Vol. 94, H. 1 , 012004, 5 S..

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Official URL: http://edoc.unibas.ch/dok/A5261943

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Abstract

Total and differential cross sections for the reaction p(gamma,eta)p have been measured for photon energies in the range from 750 MeV to 3 GeV. The low-energy data are dominated by the S-11 wave which has two poles in the energy region below 2 GeV. Eleven nucleon resonances are observed in their decay into peta. At medium energies we find evidence for a new resonance N(2070)D-15 with (M,Gamma)=(2068+/-22, 295+/-40) MeV. At gamma energies above 1.5 GeV, a strong peak in the forward direction develops, signaling the exchange of vector mesons in the t channel.
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: Photoproduction of eta mesons off protons for 0.75 GeV > E-gamma > 3 GeV -- 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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