Quark propagator and chiral condensate in an instanton vacuum

Journal Article · Thu Aug 01 04:00:00 EDT 1985 · Sov. Phys. - JETP (Engl. Transl.); (United States)

OSTI ID:6094288

D'yakonov, D I; Petrov, V Y

A new mechanism is proposed for the spontaneous breaking of chiral symmetry of strong interactions in the instanton vacuum of quantum chromodynamics. The mechanism is based on the collectivization of zero-fermion modes of individual instantons in a pseudoparticle medium. The quark propagator in an instanton medium is found, and it is shown that the massless pole of the free propagator cancels out, with the quark assuming a momentum-dependent effective mass. The parameters of the instanton medium found previously are used to obtain the value of the chiral condensate and the effective mass of the quark, which are in good agreement with phenomenology.

• Research Organization: B. P. Konstantinov Leningrad Institute of Nuclear Physics
• OSTI ID: 6094288
• Journal Information: Sov. Phys. - JETP (Engl. Transl.); (United States), Journal Name: Sov. Phys. - JETP (Engl. Transl.); (United States) Vol. 62:2; ISSN SPHJA
• Country of Publication: United States
• Language: English

Related Subjects

645300 -- High Energy Physics-- Particle Invariance Principles & Symmetries
645400* -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHIRAL SYMMETRY
ELEMENTARY PARTICLES
FIELD THEORIES
INSTANTONS
POSTULATED PARTICLES
PROPAGATOR
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARKS
QUASI PARTICLES
SYMMETRY
SYMMETRY BREAKING
VACUUM STATES