Lattice QCD computation of the color fields for the static hybrid quark-gluon-antiquark system, and microscopic study of the Casimir scaling

Journal Article · Mon Feb 01 00:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.034504· OSTI ID:21409190

Cardoso, M; Cardoso, N; Bicudo, P ^[1]

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1. CFTP, Departamento de Fisica, Instituto Superior Tecnico, Av. Rovisco Pais, 1049-001 Lisboa (Portugal)

The chromoelectric and chromomagnetic fields, created by a static gluon-quark-antiquark system, are computed in quenched SU(3) lattice QCD, in a 24{sup 3}x48 lattice at {beta}=6.2 and a=0.07261(85) fm. We compute the hybrid Wilson loop with two spatial geometries, one with a U shape and another with an L shape. The particular cases of the two-gluon glueball and quark-antiquark are also studied, and the Casimir scaling is investigated in a microscopic perspective. This microscopic study of the color fields is relevant to understanding the structure of hadrons, in particular, the hybrid excitation of mesons. This also contributes to understanding confinement with flux tubes and to discriminating between the models of fundamental versus adjoint confining strings, analogous to type-II and type-I superconductivity.

• OSTI ID: 21409190
• Journal Information: Physical Review. D, Particles Fields, Vol. 81, Issue 3; Other Information: DOI: 10.1103/PhysRevD.81.034504; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTIQUARKS
CASIMIR EFFECT
COLOR MODEL
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
CONFINEMENT
EXCITATION
GLUEBALLS
GLUONS
LATTICE FIELD THEORY
MESONS
QUANTUM CHROMODYNAMICS
QUARK-ANTIQUARK INTERACTIONS
QUARK-GLUON INTERACTIONS
QUENCHING
SCALING
SU-3 GROUPS
SUPERCONDUCTIVITY
WILSON LOOP
ANTIMATTER
ANTIPARTICLES
BOSONS
COMPOSITE MODELS
CONSTRUCTIVE FIELD THEORY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTARY PARTICLES
ENERGY-LEVEL TRANSITIONS
EVALUATION
FERMIONS
FIELD THEORIES
HADRONS
INTERACTIONS
LIE GROUPS
MATHEMATICAL MODELS
MATTER
PARTICLE INTERACTIONS
PARTICLE MODELS
PHYSICAL PROPERTIES
QUANTUM FIELD THEORY
QUARK MODEL
QUARKS
SIMULATION
SU GROUPS
SYMMETRY GROUPS