We consider transitions from the resonance X(3872) to the chi_{cJ} states of charmonium with emission of one or two pions as a means of studying the structure of the X resonance. We find that the relative rates for these transitions to the final states with different J significantly depend on whether the initial state is a pure charmonium state or a four-quark/molecular state.
Cite
@article{arxiv.0709.4474,
title = {Pionic transitions from X(3872) to chi_{cJ}},
author = {S. Dubynskiy and M. B. Voloshin},
journal= {arXiv preprint arXiv:0709.4474},
year = {2008}
}