On the Lorentz nature of confinement in heavy-light quarkonia

Journal Article · Sat Sep 15 04:00:00 EDT 2007 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778807090086· OSTI ID:21077631

Nefediev, A V ^[1]

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1. Institute of Theoretical and Experimental Physics (Russian Federation)

The Lorentz nature of the effective interquark interaction in a heavy-light quarkonium is studied using the vacuum correlators method and the generalized Nambu-Jona-Lasinio potential quark model. An effective scalar interaction is demonstrated to appear self-consistently owing to chiral-symmetry breaking and to dominate for low-lying states in the bound-state spectrum. The relation between such an effective interquark interaction and the QCD string approach is discussed. On the contrary, the upper part of this spectrum is found to be governed by the spatial Lorentz vector interaction which leads to a degeneracy for the states with opposite parity-the so-called restoration of chiral symmetry for excited hadrons.

• OSTI ID: 21077631
• Journal Information: Physics of Atomic Nuclei, Journal Name: Physics of Atomic Nuclei Journal Issue: 9 Vol. 70; ISSN 1063-7788; ISSN PANUEO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOUND STATE
CHIRAL SYMMETRY
CONFINEMENT
HADRONS
INTERACTIONS
PARITY
POTENTIALS
QUANTUM CHROMODYNAMICS
QUARK MODEL
QUARKONIUM
SPECTRA
SYMMETRY BREAKING