2006/01/31 by Hong Chen, R. G. Ping, Rong-Gang Ping · 1 citation
Physics and Astronomy · #Baryon #Helicity #High-Energy Particle Collisions Research #Meson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Quantum Chromodynamics and Particle Interactions #Quark #Quarkonium #hep-ph
paper · pdf · doi:10.1016/j.physletb.2006.05.093
published as Phys.Lett.B644:54-58,2007 · 8 pages, 1 figures, Your comments are welcome
arxiv created 2006/04/21 · openalex publication_date 2006/11/28 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Rescattering effects of baryon and antibaryon in heavy quarkonium decays are investigated by studying their angular distributions. The rescattering amplitudes are phenomenologically evaluated by modeling the intermediate range interaction as a σ or pion meson exchange between \qqbar quarks. The results show that the rescattering effects play an important role in determination of the angular distribution in heavy quarkonium decays. Especially, for J/psi and ψ' decays into Λ Λ, Σ0 Σ0 and Ξ- Ξ+ the angular distribution parameters could turn to be negative values in the limit of helicity conservation. These results provide us a possible explanation for understanding the negative sign of the angular distribution parameter measured for J/psi →Σ0Σ0, namely, \it it might come from the baryonic SU(3)F symmetry breaking by incorporating rescattering effects