2004/10/31 by Feng-Kun Guo, F. -K. Guo, Peng-Nian Shen +5 · 36 citations
Mathematics · Physics and Astronomy · #High-Energy Particle Collisions Research #Invariant (physics) #Invariant mass #Mass spectrum #Mathematics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Quarkonium #State (computer science) #Statistical physics #Unitary state #hep-ph
paper · pdf · doi:10.1016/j.nuclphysa.2005.07.019
published in Nuclear Physics A 761(3-4), 269-282 (Elsevier BV) · 17 pages, 8 figures; misprints corrected
openalex publication_date 2005/08/19 · arxiv created 2006/04/21 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
π+π- transitions of heavy quarkonia, especially the Υ(3S)→Υ(1S)π+π- decay process, are revisited. In the framework of the Chiral Unitary Theory (ChUT), the S wave ππ final state interaction (FSI) is included. It is found that when an additional intermediate state with JP=1+ and I=1 is introduced, not only the ππ invariant mass spectrum and the cosθπ^* distribution in the Υ(3S)→Υ(1S)π+π- process can simultaneously be well-explained, but also a consistent description for other bottomonia π+π- transitions can be obtained. As a consequence, the mass and the width of the intermediate state are predicted. From the quark content analysis, this state should be a b bq q state.