The chromomagnetic interaction, with proper account for flavour-symmetry breaking, is shown to explain the mass and coupling properties of the X(3872) resonance as a JPC = 1++ state consisting of a heavy quark-antiquark pair and a light one. It is crucial to introduce all the spin-colour configurations compatible with these quantum numbers and diagonalise the chromomagnetic interaction in this basis. This approach thus differs from the molecular picture DDˉ∗ and from the diquark-antidiquark picture.
@article{arxiv.hep-ph/0511039,
title = {A chromomagnetic mechanism for the X(3872) resonance},
author = {H. Hogaasen and J. M. Richard and P. Sorba},
journal= {arXiv preprint arXiv:hep-ph/0511039},
year = {2009}
}
Comments
4 pages - revtex4 - Typos corrected, refs. added, to be published in Phys. Rev. D