Is the anomalous decay ratio of D_{sJ}(2632) due to isospin breaking?
| dc.creator | Maiani, L. | |
| dc.creator | Piccinini, F. | |
| dc.creator | Polosa, A. D. | |
| dc.creator | Riquer, V. | |
| dc.date | 2004-07-02 | |
| dc.date.accessioned | 2026-07-07T10:29:12Z | |
| dc.date.available | 2026-07-07T10:29:12Z | |
| dc.description | Quark pair annihilation into gluons is suppressed at large momenta due to the asymptotic freedom. As a consequence, mass eigenvalues of heavy states should be almost diagonal with respect to up and down quark masses, thereby breaking isospin. We suggest the particle observed by the SELEX Collaboration, D_{sJ}(2632) to be to a good extent a [cd][dbar sbar] state, which would explain why its D^0 K^+ mode is anomalously suppressed with respect to D_s eta. Predictions for the rates of the yet unobserved modes D_s pi^0 and D^+ K^0 are given. | |
| dc.description | 3 pages, 1 figure | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0407025 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0407025 | |
| dc.identifier | Phys.Rev.D70:054009,2004 | |
| dc.identifier | doi:10.1103/PhysRevD.70.054009 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/177719 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Is the anomalous decay ratio of D_{sJ}(2632) due to isospin breaking? | |
| dc.type | text |