Chiral symmetry breaking and monopole dynamics in noncompact QED{sub 3} coupled to a four-Fermi interaction

Journal Article · Thu Jul 01 04:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.014503· OSTI ID:21410048

Armour, Wesley ^[1]; Kogut, John B ^[2]; Strouthos, Costas ^[3]

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1. Diamond Light Source, Harwell Campus, Didcot, Oxfordshire OX11 0DE (United Kingdom)
2. Department of Energy, Division of High Energy Physics, Washington, D.C. 20585 (United States) and Department of Physics-TQHN, University of Maryland, 82 Regents Drive, College Park, Maryland 20742 (United States)
3. Computation-based Science and Technology Research Center, Cyprus Institute, 1645 Nicosia (Cyprus)

We present results from the first lattice simulations of three-dimensional noncompact quantum electrodynamics (QED{sub 3}) with N{sub f} four-component fermion flavors coupled to a weak Z{sub 2} chirally invariant four-fermi interaction. Results with N{sub f{>=}}4 show that the scaling near the strong coupling chiral transition or sharp crossover is determined by the 3d Gross-Neveu ultraviolet-stable renormalization group fixed point. Small deviations of the N{sub f}=4 critical exponents from the respective Gross-Neveu ones, hint at evidence for nonzero fermion mass generated by the gauge fields dynamics that might have been enhanced by the four-fermi coupling. It is also shown that the scaling region is suppressed at weak four-fermi couplings and large N{sub f} values. Measurements of (i) a monopole susceptibility which is the polarizability of the monopole configurations, and (ii) the density of isolated monopoles, imply that for N{sub f{>=}}1 and weak gauge couplings the monopoles do not affect the theory's confining properties, because they are shielded.

• OSTI ID: 21410048
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 82; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
CHIRAL SYMMETRY
CHIRALITY
COMPOSITE MODELS
COMPUTERIZED SIMULATION
CONFIGURATION
CONSTRUCTIVE FIELD THEORY
COUPLING
ELECTRICAL PROPERTIES
ELECTRODYNAMICS
FERMI INTERACTIONS
FERMIONS
FIELD THEORIES
FLAVOR MODEL
GAUGE INVARIANCE
INTERACTIONS
INVARIANCE PRINCIPLES
LATTICE FIELD THEORY
MASS
MATHEMATICAL MODELS
MONOPOLES
NUCLEAR MODELS
PARTICLE MODELS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
POLARIZABILITY
QUANTUM ELECTRODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
RENORMALIZATION
SIMULATION
STRONG-COUPLING MODEL
SYMMETRY
SYMMETRY BREAKING
THREE-DIMENSIONAL CALCULATIONS
WEAK INTERACTIONS
WEAK-COUPLING MODEL