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Is the anomalous decay ratio of D$_{sJ}$(2632) due to isospin breaking?
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 Collaborati...
| Autores principales: | , , , |
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| Lenguaje: | eng |
| Publicado: |
2004
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.70.054009 http://cds.cern.ch/record/768134 |