Anomalous magnetic moment of light quarks and dynamical symmetry breaking

Journal Article · Fri Mar 01 04:00:00 EST 1985 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.31.1097· OSTI ID:5991145

Singh, J P

It is shown that in theories in which chiral symmetry breaks dynamically, quarks can have a rather large anomalous magnetic moment. This has been first shown, as an example, in a modified Nambu--Jona-Lasinio model. Next, using light-quark dynamical masses in QCD, derived and used by various authors, the light-quark anomalous magnetic moment has been calculated. This has been done in the one-gluon-exchange approximation using a nonsingular or singular form of the gluon propagator in a consistent way. It has been found that not all forms of quark dynamical masses give sensible results. Finally, some of the phenomenological consequences of the presence of such a term have also been worked out.

• Research Organization: Department of Physics, Indian Institute of Technology, Kanpur 208 016, India
• OSTI ID: 5991145
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 31:5; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645302* -- High Energy Physics-- Particle Invariance Principles & Symmetries-- Applications to Electromagnetic & Weak Interactions-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHIRAL SYMMETRY
ELEMENTARY PARTICLES
FIELD THEORIES
FUNCTIONS
GLUONS
LAGRANGIAN FUNCTION
MAGNETIC MOMENTS
MASS
PERTURBATION THEORY
POSTULATED PARTICLES
PROPAGATOR
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARKS
SYMMETRY
SYMMETRY BREAKING