Fully relativistic quark models for heavy-light systems

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Abstract
A fully relativistic quark model is constructed and applied to the study of wave functions as well as the spectrum of heavy-light mesons. The free parameters of the model are a constituent quark mass and (on the lattice) an adjustable r parameter in the fermionic kinetic energy, while the confinement is introduced via potentials measured by Monte Carlo simulation. The results are compared to Monte Carlo energies and Coulomb-gauge wave functions. They are in very good agreement with the data. A comparison with previous models suggests that we are seeing in the Monte Carlo data the quantum-relativistic delocalization of the quark due to Zitterbewegung. © 1996 The American Physical Society.

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