Dyson-Schwinger equations : a tool for hadron physics.
Dyson-Schwinger equations furnish a Poincare covariant framework within which to study hadrons. A particular feature is the existence of a nonperturbative, symmetry preserving truncation that enables the proof of exact results. The gap equation reveals that dynamical chiral symmetry breaking is tied to the long-range behavior of the strong interaction, which is thereby constrained by observables, and the pion is precisely understood, and seen to exist simultaneously as a Goldstone mode and a bound state of strongly dressed quarks. The systematic error associated with the simplest truncation has been quantified, and it underpins a one-parameter model efficacious in describing an extensive body of mesonic phenomena. Incipient applications to baryons have brought successes and encountered challenges familiar from early studies of mesons, and promise a covariant field theory upon which to base an understanding of contemporary large momentum transfer data.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); OGA
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 961168
- Report Number(s):
- ANL/PHY/JA-45203; TRN: US1003270
- Journal Information:
- Int. J. Mod. Phys. E, Vol. 12, Issue 3 ; Jun. 2003
- Country of Publication:
- United States
- Language:
- ENGLISH
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Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BARYONS
BETHE-SALPETER EQUATION
BOUND STATE
CHIRAL SYMMETRY
CONFINEMENT
EQUATIONS
ERRORS
FADDEEV EQUATIONS
FORM FACTORS
HADRONS
MESONS
MOMENTUM TRANSFER
PHYSICS
PIONS
QUANTUM CHROMODYNAMICS
QUARKS
SIMULATION
STRONG INTERACTIONS
SYMMETRY
SYMMETRY BREAKING