  Hadron production in relativistic nuclear collisions is well described in the
framework of the Statistical Hadronization Model (SHM). We investigate the
influence on SHM predictions of hadron mass spectra for light-flavor baryons
and mesons modified by the addition of about 500 new states as predicted by
lattice QCD and a relativistic quark model. The deterioration of the resulting
thermodynamic fit quality obtained for PbPb collision data at sqrt(s_nn) = 2.76
TeV suggests that the additional states are not suited to be naively used since
also interactions among the states as well as non-resonant contributions need
to be considered in the SHM approach. Incorporating these effects via the pion
nucleon interaction determined from measured phase shifts leads again to
excellent reproduction of the experimental data. This is a strong indication
that at least the additional nucleon excited states cannot be understood and
used as independent resonances.
