Jia-Jun Wu, T. -S. H. Lee, B. S. Zou
The model dependence of the predictions of nucleon resonances with hidden
charm is investigated. We consider several coupled-channel models which are
derived from relativistic quantum field theory by using (1) a unitary
transformation method, and (2) the three-dimensional reductions of
Bethe-Salpeter Equation. With the same vector meson exchange mechanism, we find
that all models give very narrow molecular-like nucleon resonances with hidden
charm in the mass range of 4.3 GeV $ < M_R < $ 4.5 GeV, in consistent with the
previous predictions.
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http://arxiv.org/abs/1202.1036
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