Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 64: Hadron Structure and Spectroscopy XI
HK 64.4: Vortrag
Freitag, 18. März 2016, 15:00–15:15, S1/01 A5
Determination of the real part of the η′-Nb optical potential — •Mariana Nanova for the CBELSA/TAPS collaboration — II. Physikalisches Institut, Justus-Liebig-Universität Gießen
The excitation function and momentum distribution of η′ mesons have been measured in photo production 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 -(38 ± 9(stat)±12(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) [1].
M. Nanova et al., Phys. Lett. B 727 (2013), 417
∗Funded by DFG (SFB/TR16)