2006/05/31 by Elena Santopinto, E. Santopinto, Giuseppe Galatà +1 · 3 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevc.75.045206
published as Phys.Rev.C75:045206,2007 · Accepted for pubblication in Phys.Rev. C, 29 pages, 3 figures, Diquark-antidiquark limit added, references added, figures changed
arxiv created 2007/03/01 · openalex publication_date 2007/04/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
A complete classification of qqqq tetraquark states in terms of the spin-flavor, color, and spatial degrees of freedom was constructed. The permutation symmetry properties of both the spin-flavor and orbital parts of the qq and qq subsystems are discussed. This complete classification is general and model independent and it is useful both for model builders and experimentalists. The total wave functions are also explicitly constructed in the hypothesis of ideal mixing; this basis for tetraquark states will enable the eigenvalue problem to be solved for a definite dynamical model. An evaluation of the tetraquark spectrum was obtained from the Iachello mass formula for normal mesons, here generalized to tetraquark systems. This mass formula is a generalization of the Gell-Mann Okubo mass formula, whose coefficients have been upgraded by a study of the latest PDG data. The ground-state tetraquark nonet was identified with f0(600),\ensuremathκ(800),f0(980),a0(980). The diquark-antidiquark limit was also studied.