| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10726303 | Progress in Particle and Nuclear Physics | 2012 | 6 Pages |
Abstract
In the present paper, a largely empirical yet very successful approach to meson spectroscopy is revisited, in which all the above phenomena can be accounted for non-perturbatively, with concrete examples of some enigmatic mesonic states described in detail. First, the X(4260) charmonium enhancement is argued to be a non-resonant structure resulting from depletion effects due to competing channels and resonances. Then, the X(3872) charmonium-like meson is described as a unitarised JPC=1++ccÌ state. Also, the unusual pattern of masses and widths of the open-charm axial-vector mesons D1(2420), D1(2430), Ds1(2536), and Ds1(2460)Â is shown to follow from highly non-perturbative coupled-channel and mixing effects. Finally, first indications of a very light scalar boson are presented, on the basis of published BABAR data.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
George Rupp, Susana Coito, Eef van Beveren,