Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-10-02
Phys.Rev.D78:076004,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
3 figures. To appear in Physical Review D
Scientific paper
10.1103/PhysRevD.78.076004
Extensively applied to both light and heavy meson decay and standing as one of the most successful strong decay models is the $3^P_0$ model, in which $q\bar{q}$ pair production is the dominant mechanism. The pair production can be obtained from the non-relativistic limit of a microscopic interaction Hamiltonian involving Dirac quark fields. The evaluation of the decay amplitude can be performed by a diagrammatic technique for drawing quark lines. In this paper we use an alternative approach which consists in a mapping technique, the Fock-Tani formalism, in order to obtain an effective Hamiltonian starting from same microscopic interaction. An additional effect is manifest in this formalism associated to the extended nature of mesons: bound-state corrections. A corrected $3^P_0$ is obtained and applied, as an example, to $b_{1}\to\omega\pi$ and $a_{1}\to\rho\pi$ decays.
Da Silva D. T.
de Quadros J. N.
Hadjimichef Dimiter
Lino da Silva Mario
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