Determination of the real part of the η′-Nb optical potential

Nanova, M. and Friedrich, S. and Metag, V. and Paryev, E. Ya. and Afzal, F. N. and Bayadilov, D. and Beck, R. and Becker, M. and Boese, S. and Brinkmann, K. -T. and Crede, V. and Elsner, D. and Frommberger, F. and Gruener, M. and Gutz, E. and Hammann, Ch. and Hannappel, J. and Hartmann, J. and Hillert, W. and Hoffmeister, P. and Honisch, Ch. and Jude, T. and Kalischewski, F. and Keshelashvili, I. and Klein, F. and Koop, K. and Krusche, B. and Lang, M. and Makonyi, K. and Messi, F. and Mueller, J. and Muellers, J. and Piontek, D. -M. and Rostomyan, T. and Schaab, D. and Schmidt, C. and Schmieden, H. and Schmitz, R. and Seifen, T. and Sowa, C. and Spieker, K. and Thiel, A. and Thoma, U. and Triffterer, T. and Urban, M. and van Pee, H. and Walther, D. and Wendel, C. and Werthmuller, D. and Wiedner, U. and Wilson, A. and Witthauer, L. and Wunderlich, Y. and Zaunick, H. -G.. (2016) Determination of the real part of the η′-Nb optical potential. Physical Review C, 94 (2). 025205.

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The excitation function and momentum distribution of η′ mesons have been measured in photoproduction off 93Nb in the energy range of 1.2–2.9 GeV. The experiment has been performed with the combined Crystal Barrel and MiniTAPS detector system, using tagged photon beams from the ELSA electron accelerator. Information on the sign and magnitude of the real part of the η′-Nb potential has been extracted from a comparison of the data with model calculations. An attractive potential of −(41±10(stat)±15(syst)) MeV depth at normal nuclear matter density is deduced within model uncertainties. This value is consistent with the potential depth of −(37±10(stat)±10(syst)) MeV obtained in an earlier measurement for a light nucleus (carbon). This relatively shallow η′-nucleus potential will make the search for η′-nucleus bound states more difficult.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Hadronenphysik (Krusche)
UniBasel Contributors:Krusche, Bernd
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Feb 2017 14:47
Deposited On:22 Feb 2017 14:46

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