Chiral-symmetry breaking and the QCD string

Journal Article · Fri Feb 15 04:00:00 EST 2008 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778808020130· OSTI ID:22028169

Nefediev, A V; Simonov, Yu A ^[1]

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

The Lorentz nature of the effective interquark interaction is investigated in a heavy-light quarkonium. The approach of the Dyson-Schwinger-type equation and the quantum-mechanical Hamiltonian method of the QCD string with quarks at the ends are employed to demonstrate that the effective scalar interaction, which appears owing to chiral-symmetry breaking, is responsible for the QCD-string formation. The Hamiltonian of the QCD string with quarks at the ends arises naturally if this effective scalar interaction dominates. If, on the contrary, chiral symmetry is manifest, the effective interquark interaction remains vectorial, and the corresponding bound-state equation is incompatible with the QCD-string Hamiltonian.We conclude therefore that the genuine Lorentz nature of the QCD string is scalar.

• OSTI ID: 22028169
• Journal Information: Physics of Atomic Nuclei, Journal Name: Physics of Atomic Nuclei Journal Issue: 2 Vol. 71; 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
HAMILTONIANS
QUANTUM CHROMODYNAMICS
QUANTUM MECHANICS
QUARK-QUARK INTERACTIONS
QUARKONIUM
QUARKS
SCHWINGER FUNCTIONAL EQUATIONS
STRING MODELS
SYMMETRY BREAKING