Bass, S.Thomas, A.2014-11-182014-11-182014Acta Physica Polonica, Series B: Elementary Particle Physics, Nuclear Physics, Statistical Physics, Theory of Relativity, Field Theory, 2014, vol.45, iss.3, pp.627-6380587-42541509-5770http://hdl.handle.net/2440/87271We discuss the role of QCD symmetries and confinement in understanding η- and η′-mesic nuclei. η and η′ bound states in nuclei are sensitive to the flavour-singlet component in the meson. The bigger the singlet component, the more attraction and the greater the binding. Recent results on the η′ mass in nuclei from the CBELSA/TAPS Collaboration are very similar to the prediction of the Quark Meson Coupling model. In the model, η–η′ mixing induces a factor of two enhancement of the η-nucleon scattering length aηN relative to the prediction with a pure octet η with real part about 0.8 fm.enCopyright status unknownConference paper003000918410.5506/APhysPolB.45.6270003334383000032-s2.0-8489890921493867Thomas, A. [0000-0003-0026-499X]