2004/07/11 by T. Barnes, F. E. Close, J. J. Dudek +5 · 3 citations
Chemistry · Physics and Astronomy · #Branching fraction #Chemistry #Fermilab #High-Energy Particle Collisions Research #Meson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Systematic evolution of ligands by exponential enrichment #hep-ex #hep-ph
paper · pdf · doi:10.1016/j.physletb.2004.08.075
published as Phys.Lett.B600:223-230,2004 · 6 revtex4 pages, 2 eps figures
arxiv created 2004/07/11 · openalex publication_date 2004/09/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We consider possible assignments for the Ds\J+(2632), which was recently reported in Ds+η and D0K+ final states by the SELEX Collaboration at Fermilab. The most plausible quark model assignment for this state is the first radial excitation (23§1) of the c s Ds^*(2112), although the predicted mass and strong decay branching fractions for this assignment are not in agreement with the SELEX data. The reported dominance of Dsη over DK appears especially problematic. An intriguing similarity to the K^*(1414) is noted. 23§1--3\D1 configuration mixing is also considered, and we find that this effect is unlikely to resolve the branching fraction discrepancy. Other interpretations as a c s-hybrid or a two-meson molecule are also considered, but appear unlikely. Thus, if this state is confirmed, it will require reconsideration of the systematics of charmed meson spectroscopy and strong decays.