Making use of a recently proposed formalism, we analyze the composite nature of the Pc(4450) resonance observed by LHCb. We show that the present data suggest that this state is almost entirely made of a χc1 and a proton, due to the close proximity to this threshold. This also suppresses the decay modes into other, lighter channels, in our study represented by J/Ψp. We further argue that this is very similar to the case of the scalar meson f0(980) which is located closely to the KKˉ threshold and has a suppressed decay into the lighter ππ channel.
@article{arxiv.1507.07478,
title = {Testing the $\chi_{c1}\, p$ composite nature of the $P_c(4450)$},
author = {Ulf-G. Meißner and José A. Oller},
journal= {arXiv preprint arXiv:1507.07478},
year = {2015}
}