Chiral symmetry breaking and scalar string confinement

Journal Article · Mon Nov 01 00:00:00 EST 2004 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.70.094047· OSTI ID:20705641

Bicudo, P; Marques, G M ^[1]

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1. Departamento de Fisica and Centro de Fisica das Interaccoes Fundamentais, Instituto Superior Tecnico, Avenida Rovisco Pais 1049-001 Lisbon (Portugal)

We address the old difficulty in accommodating the scalar quark-antiquark confining potential together with chiral symmetry breaking. We develop a quark confining potential inspired in the QCD scalar flux tube. The coupling to quarks consists in a double vector vertex. We study the Dirac and spin structure of this potential. In the limit of massless quarks, the quark vertex is vector. Nevertheless, symmetry breaking generates a new scalar quark vertex. In the heavy quark limit, the coupling is mostly scalar. We solve the mass gap equation and find that this potential produces spontaneous chiral symmetry breaking for light quarks. The quantitative results of this model are encouraging.

• OSTI ID: 20705641
• Journal Information: Physical Review. D, Particles Fields, Vol. 70, Issue 9; Other Information: DOI: 10.1103/PhysRevD.70.094047; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B QUARKS
BAG MODEL
C QUARKS
CHIRAL SYMMETRY
COUPLING
D QUARKS
POTENTIALS
QUANTUM CHROMODYNAMICS
REST MASS
SCALARS
SPIN
SYMMETRY BREAKING
T QUARKS
U QUARKS
VERTEX FUNCTIONS