Investigating different structures for the $X(3872)$

Abstract

Using the QCD spectral sum rule approach we investigate different currents with $J^{PC}=1^{++}$, which could be associated with the $X(3872)$ meson. Our results indicate that, with a four-quark or molecular structure, it is very difficult to explain the narrow width of the state unless the quarks have a special color configuration.

Comments: 4 pages. Contribution to the proceedings of the 15th International QCD Conference (QCD10)