The molecule and the tetraquark model are the two competing interpretations of the X(3872). I will briefly comment on how far these two pictures are really resolvable by the experiment, and I will give a concise account on a new method for defining the quark content of hadrons at heavy-ion colliders.
@article{arxiv.hep-ph/0609137,
title = {The double life of the X meson},
author = {A. D. Polosa},
journal= {arXiv preprint arXiv:hep-ph/0609137},
year = {2007}
}
Comments
6 pages, to appear in the Proceedings of IFAE2006, Pavia, Italy