Strong Decays of Light Vector Mesons

Details Strong Decays of Light Vector Mesons Strong Decays of Light Vector Mesons

2002-08-09

arxiv.org/abs/nucl-th/0208019v1

Phys.Rev. C67 (2003) 035202

Physics

Nuclear Physics

Nuclear Theory

Submitted for publication; 10x2-column pages, REVTEX 4, 3 .eps files making 3figs

Scientific paper

10.1103/PhysRevC.67.035202

The vector meson strong decays rho-->pi pi, phi-->KK, and K^star-->pi K are studied within a covariant approach based on the ladder-rainbow truncation of the QCD Dyson--Schwinger equation for the quark propagator and the Bethe--Salpeter equation for the mesons. The model preserves the one-loop behavior of QCD in the ultraviolet, has two infrared parameters, and implements quark confinement and dynamical chiral symmetry breaking. The 3-point decay amplitudes are described in impulse approximation. The Bethe--Salpeter study motivates a method for estimating the masses for heavier mesons within this model without continuing the propagators into the complex plane. We test the accuracy via the rho, phi and K^{star} masses and then produce estimates of the model results for the a_1 and b_1 masses as well as the mass of the proposed exotic vector pi_1(1400).

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