Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-11-02
Physics
High Energy Physics
High Energy Physics - Phenomenology
Nov 2005. 5pp. To appear in the proceedings of the 11th International Conference on Hadron Spectroscopy (Hadron05), Rio de Jan
Scientific paper
10.1063/1.2176532
Several years ago we have proposed a manifestly covariant $\tilde{U}(12)_{SF}$-classification scheme of hadrons, which maintains the successful $SU(6)_{SF}\otimes O(3)_{L}$ framework in Non-Relativistic Quark Model and is also reconcilable with the mechanism of Spontaneously-Broken Chiral Symmetry in Relativistic Field Theoretical Models. The essential point here is to notice the overlooked freedom of the $SU(2)_{\rho}$-spin for (confined) light quarks, which leads to existence of new type of ``exotic'' hadrons, called ``chiralons'' and to a selection rule, $\rho_{3}$-line rule, on the spectator quark line. A series of puzzling new hadrons recently observed such as X(3872)-meson family and $\Theta (1540)$ and so on are possibly classified mostly as chiralons.
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