Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-03-14
Nucl.Phys.Proc.Suppl. 90 (2000) 154-160
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, 5 figures, 1 table, 16 references, Latex2e. Proceedings of the Workshop on Light-Cone QCD and Nonperturbative Hadron
Scientific paper
Taking the effective interaction between a quark and an anti-quark from previous work, the dependendence on a regularization scale is removed in line with the renormalization group. In order to emphasize the essential point, the full spinor interaction is replaced by a model which includes only the Coulomb and the hyperfine interaction. By adjusting the effective quark masses, the only free parameters of the theory, the mass and the size of the pion are reproduced, as well as the mass of all other pseudo-scalar mesons. Estimates for the vector mesons are close to the empirical values. The model exposes screening rather than strict confinement. The ionization thresholds are in general much larger than the pion mass.
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