Dresden 2013 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 27: Hadronenstruktur und -spektroskopie

HK 27.3: Vortrag

Dienstag, 5. März 2013, 14:45–15:00, HSZ-101

New experimental approaches to determine the real part of the η^′-nucleus potential^⋆ — •Mariana Nanova — II. Physikalisches Institut, Justus Liebig Universität Giessen

Transparency ratio measurements provide information on the inelastic cross section and in-medium width of η^′ and thereby on the imaginary part of the η^′-nucleus potential [1]. The real part of the η^′-nucleus optical potential can be deduced from the measurement of the η^′ excitation function and of the η^′ momentum distribution which are sensitive to the sign and depth of the potential. Data taken in 2009 at CB/TAPS@ELSA on a carbon target have been analysed. The results are compared to model calculations [2] assuming different scenarios for the real part of the potential, related directly to the in-medium mass modification of the meson. The data are consistent with a weakly attractive η^′-nucleus potential.
[1] M. Nanova et al., Phys. Lett. B 710 (2012) 600
[2] E. Paryev, arXiv 1209.4050 [nucl-th]
^⋆Funded by DFG(SFB/TR-16)