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HK: Fachverband Physik der Hadronen und Kerne
HK 37: Hadron Structure and Spectroscopy 7
HK 37.3: Talk
Tuesday, March 24, 2015, 17:45–18:00, T/SR19
Search for η′-mesic states at BGO-OD∗ — •Eric Gutz — II. Physikalisches Institut, Justus-Liebig-Universität Gießen
The study of the interaction between mesons and the nuclear medium is a very promising approach to understand strong QCD at a fundamental level. The determination of the real and imaginary part of the η′-nucleus potential [1,2] indicates attraction and a relatively narrow in-medium width of the η′ meson, making it a suitable candidate for the observation of meson-nucleus bound states. It has been proposed [3] to search such states in the
12C(γ,p) η′⊗ 11B reaction, using the BGO-OD setup at ELSA which combines a magnetic spectrometer at forward angles with photon detection over a large solid angle in the BGO ball. This setup allows a search for η′ mesic states by missing mass spectrometry as well as by looking for decays from η′ mesic states in coincidence with forward going protons. Simulations of the proposed reaction will be presented and the feasibility of the experiment will be discussed in view of a recent test experiment.
M. Nanova et al., Phys. Lett. B 727 (2013), 417
M. Nanova et al., Phys. Lett. B 710 (2012), 600
V. Metag et al., approved proposal ELSA/3-2012-BGO
∗Funded by DFG (SFB/TR16)