Study of the (D)over-barN Interaction in a QCD Coulomb Gauge Quark Model
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Data
2009-01-01
Autores
Fontoura, C. E. [UNESP]
Krein, Gastão Inácio [UNESP]
Vizcarra, V. E. [UNESP]
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E D P Sciences
Resumo
We study the (D) over barN interaction at low energies with a quark model inspired in the QCD Hamiltonian in Coulomb gauge. The model Hamiltonian incorporates a confining Coulomb potential extracted from a self-consistent quasiparticle method for the gluon degrees of freedom, and transverse-gluon hyperfine interaction consistent with a finite gluon propagator in the infrared. Initially a constituent-quark mass function is obtained by solving a gap equation and baryon and meson bound-states are obtained in Fock space using a variational calculation. Next, having obtained the constituent-quark masses and the hadron waves functions, an effective meson-nucleon interaction is derived from a quark-interchange mechanism. This leads to a short range meson-baryon interaction and to describe long-distance physics vector- and scalar-meson exchanges described by effective Lagrangians are incorporated. The derived effective (D) over barN potential is used in a Lippmann-Schwinger equation to obtain phase shifts. The results are compared with a recent similar calculation using the nonrelativistic quark model.
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19th International Iupap Conference on Few-body Problems In Physics. Cedex A: E D P Sciences, v. 3, p. 8, 2009.