2012/05/08 by P. G. Ortega, P G Ortega, D. R. Entem +3
Physics and Astronomy · #High-Energy Particle Collisions Research #Quantum Chromodynamics and Particle Interactions #Quantum and Classical Electrodynamics #hep-ph #nucl-th
paper · pdf · doi:10.1088/0954-3899/40/6/065107
10 pages, 9 tables
arxiv created 2012/05/08 · openalex publication_date 2013/05/10 · arxiv updated 2015/06/05 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We study in the framework of a constituent quark model the possible contributions of molecular structures to the XYZ charmonium-like states. We analyze simultaneously the structures and the possible molecular components in the coupled channel formalism. In the 1 ++ sector two states appear which could be identified with X (3872) and X (3940). The recently confirmed X (3915) state appears as a mixture of and components as a J PC = 0 ++ state in agreement with the new measurements. A second broad resonance which may correspond with the so-called Y (3940) state is found with these quantum numbers. In the J PC = 1 −− sector we also found significant contributions of the molecular structures which may affect the phenomenology. In particular the study allows us to understand the G (3900) state recently observed in Belle and BaBar. All these resonances together with the prediction of the model of a structure for Z (3930) provide a reasonable scenario for the so-called XYZ states with masses near 3.9 GeV.