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Splitting of the π ? ρ spectrum in a renormalized light-cone QCD-inspired model

T. Frederico; Hans-Christian Pauli; Shan-Gui ZhouSubjects: Physics >> Nuclear Physics

We show that the splitting between the light pseudo-scalar and vector meson states is due to the strong short-range attraction in the 1S0 sector which makes the pion and the kaon light particles. We use a light-cone QCD-inspired model of the mass squared operator with harmonic confinement and a Dirac-delta interaction. We apply a renormalization method to define the model, in which the pseudo-scalar ground state mass fixes the renormalized strength of the Dirac-delta interaction. |

submitted time
2017-08-22
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Universal description of S-wave meson spectra in a renormalized light-cone QCD-inspired model

T. Frederico; Hans-Christian Pauli; Shan-Gui ZhouSubjects: Physics >> Nuclear Physics

A light-cone QCD-inspired model, with the mass squared operator consisting of a harmonic oscillator potential as confinement and a Dirac-delta interac- tion, is used to study the S-wave meson spectra. The two parameters of the harmonic potential and quark masses are fixed by masses of ρ(770), ρ(1450), J/ψ, ψ(2S), K?(892) and B?. We apply a renormalization method to define the model, in which the pseudo-scalar ground state mass fixes the renormal- ized strength of the Dirac-delta interaction. The model presents an universal and satisfactory description of both singlet and triplet states of S-wave mesons and the corresponding radial excitations. |

[1 Pages/ 2 Totals]