2006/07/31 by Zhang Hai-Xia, H. X. Zhang, Wen-Ling Wang +5 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1088/0253-6102/49/2/35
published as Commun.Theor.Phys.49:414-420,2008 · 20 pages
arxiv created 2006/12/05 · openalex publication_date 2008/02/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
The new members of the charm-strange family D * sJ (2317), D sJ (2460), and D s (2632), which have the surprising properties, are challenging the present models. Many theoretical interpretations have been devoted to this issue. Most authors suggest that they are not the conventional c quark model states, but possibly are four-quark states, molecule states, or mixtures of a P-wave c and a four-quark state. In this work, we follow the four-quark-state picture, and study the masses of cn / cs states ( n is u or d quark) in the chiral SU(3) quark model. The numerical results show that the mass of the mixed four-quark state (cn / cs ) with spin parity J P = 0 + might not be D s (2632). At the same time, we also conclude that D * sJ (2317) and D sJ (2460) cannot be explained as the pure four-quark state.