Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-01-18
Phys.Rev.D73:034002,2006; Erratum-ibid.D74:059903,2006
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages, 5 tables. Accepted for publication in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.73.034002
We present a theoretical framework that accounts for the new $D_J$ and $D_{sJ}$ mesons measured in the open-charm sector. These resonances are properly described if considered as a mixture of conventional $P-$wave quark-antiquark states and four-quark components. The narrowest states are basically $P-$wave quark-antiquark mesons, while the dominantly four-quark states are shifted above the corresponding two-meson threshold, being broad resonances. We study the electromagnetic decay widths as basic tools to scrutiny their nature. The proposed explanation incorporates in a natural way the most recently discovered mesons in charmonium spectroscopy.
Fernandez Francisco
Valcarce Aldo
Vijande Javier
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