Determination of the η'-nucleus optical potential

Nanova, M. and Metag, V. and Paryev, E. Ya. and Bayadilov, D. and Bantes, B. and Beck, R. and Beloglazov, Y. A. and Boese, S. and Brinkmann, K. -T. and Challand, Th. and Crede, V. and Dahlke, T. and Dietz, F. and Drexler, P. and Eberhardt, H. and Elsner, D. and Ewald, R. and Fornet-Ponse, K. and Friedrich, S. and Frommberger, E. and Funke, Ch. and Gottschall, M. and Gridnev, A. and Gruener, M. and Gutz, E. and Hammann, Ch. and Hammann, D. and Hannappel, J. and Hartmann, J. and Hillert, W. and Hoffmeister, P. and Honisch, Ch. and Jaegle, I. and Kaiser, D. and Kalinowsky, H. and Kammer, S. and Keshelashvili, I. and Kleber, V. and Klein, F. and Klempt, E. and Krusche, B. and Lang, M. and Lopatin, I. V. and Maghrbi, Y. and Makonyi, K. and Mueller, J. J. and Odenthal, T. and Piontek, D. and Schaepe, S. and Schmidt, Ch. and Schmieden, H. and Schmitz, R. and Seifen, T. and Thiel, A. and Thoma, U. and van Pee, H. and Walther, D. and Wendel, Ch. and Wiedner, U. and Wilson, A. and Winnebeck, A. and Zenke, F.. (2013) Determination of the η'-nucleus optical potential. Physics letters. B, Vol. 727, H. 4-5. pp. 417-423.

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Official URL: http://edoc.unibas.ch/dok/A6223413

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The excitation function and momentum distribution of eta` mesons have been measured in photon induced reactions on C-12 in the energy range of 1250-2600 MeV. The experiment was performed with tagged photon beams from the ELSA electron accelerator using the Crystal Barrel and TAPS detectors. The data are compared to model calculations to extract information on the sign and magnitude of the real part of the eta`-nucleus potential. Within the model, the comparison indicates an attractive potential of -(37 +/- 10(stat) +/- 10(syst)) MeV depth at normal nuclear matter density. Since the modulus of this depth is larger than the modulus of the imaginary part of the eta`-nucleus potential of -(10 +/- 2.5) MeV, determined by transparency ratio measurements, a search for resolved eta`-bound states appears promising. (C) 2013 Elsevier B.V. All rights reserved.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Hadronenphysik (Krusche)
UniBasel Contributors:Krusche, Bernd
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:27 Mar 2014 13:12
Deposited On:27 Mar 2014 13:12

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