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Dynamical symmetry breaking and the sigma-meson mass in quantum chromodynamics

Journal Article · · Phys. Rev. Lett.; (United States)
;
The spontaneous breakdown of chiral symmetry is analyzed dynamically via bound-state Bethe-Salpeter equations. While in general spontaneous mass generation is linked to a massless 0/sup -/ pion and no specific constraint on a massive 0/sup +/ meson, for the particular theory of asymptotically free QCD it is shown that a 0/sup +/ sigma meson should exist with mass m/sub sigma/roughly-equal600 to 700 MeV.
Research Organization:
Physics Department, University of Tasmania, Hobart 7001, Australia
OSTI ID:
5422579
Journal Information:
Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 48:6; ISSN PRLTA
Country of Publication:
United States
Language:
English

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Related Subjects

645205* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions
Baryon No. = 0-- (-1987)
645301 -- High Energy Physics-- Particle Invariance Principles & Symmetries-- General-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BETHE-SALPETER EQUATION
BOSONS
CHIRAL SYMMETRY
COUPLING
ELEMENTARY PARTICLES
EQUATIONS
FIELD THEORIES
FUNCTIONS
HADRONS
LAGRANGIAN FUNCTION
MASS
MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
REST MASS
SCALAR MESONS
SYMMETRY
SYMMETRY BREAKING