Spin-Orbit and Tensor Forces in Heavy-quark Light-quark Mesons: Implications of the New Ds state at 2.32 GeV
| dc.creator | Cahn, Robert N. | |
| dc.creator | Jackson, J. David | |
| dc.date | 2003-05-01 | |
| dc.date | 2003-05-02 | |
| dc.date.accessioned | 2026-07-07T10:48:46Z | |
| dc.date.available | 2026-07-07T10:48:46Z | |
| dc.description | We consider the spectroscopy of heavy-quark light-quark mesons with a simple model based on the non-relativistic reduction of vector and scalar exchange between fermions. Four forces are induced: the spin-orbit forces on the light and heavy quark spins, the tensor force, and a spin-spin force. If the vector force is Coulombic, the spin-spin force is a contact interaction, and the tensor force and spin-orbit force on the heavy quark to order $1/m_1m_2$ are directly proportional. As a result, just two independent parameters characterize these perturbations. The measurement of the masses of three p-wave states suffices to predict the mass of the fourth. This technique is applied to the $D_s$ system, where the newly discovered state at 2.32 GeV provides the third measured level, and to the $D$ system. The mixing of the two $J^P=1^+$ p-wave states is reflected in their widths and provides additional constraints. The resulting picture is at odds with previous expectations and raises new puzzles. | |
| dc.description | 6 pages, 1 figure | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0305012 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0305012 | |
| dc.identifier | Phys.Rev.D68:037502,2003 | |
| dc.identifier | doi:10.1103/PhysRevD.68.037502 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/183994 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Spin-Orbit and Tensor Forces in Heavy-quark Light-quark Mesons: Implications of the New Ds state at 2.32 GeV | |
| dc.type | text |