Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-10-10
Int.J.Mod.Phys. A19 (2004) 81-114
Physics
High Energy Physics
High Energy Physics - Phenomenology
22 pages, 7 figures, LaTex file
Scientific paper
10.1142/S0217751X04017069
We study on-shell decays of light vector meson resonances $\rho$, $K^*$ and $\phi$ in the framework of chiral constituent quark model using resummation calculations. Such studies are necessary for showing that chiral dynamics works well at this energy scale. The effective action is derived by proper vertex method, where resummation of all orders of momentum expansion is accomplished. The loop effects of pseudoscalar meson are also taken into account, which play an important role at this energy scale. The numerical results agree well with the experimental data. A new method to explore the Chiral Symmetry Spontaneously Breaking (CSSB) is proposed. It is found that the unitarity of the effective meson theory resulted from resummation derivations demands an upper-limit to the momentum of vector meson. This upper-limit, being critical point, is just the energy scale of CSSB, and is found to be flavor-dependent.
Huang Yi-Bin
Wang Xiao-Jun
Yan Mu-Lin
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