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Title: Study of the gluon-quark-antiquark static potential in SU(3) lattice QCD

Abstract

We study the long distance interaction for hybrid hadrons, with a static gluon, a quark and an antiquark with lattice QCD techniques. A Wilson loop adequate to the static hybrid three-body system is developed and, using a 24{sup 3}x48 periodic lattice with {beta}=6.2 and a{approx}0.072 fm, two different geometries for the gluon-quark segment and the gluon-antiquark segment are investigated. When these segments are perpendicular, the static potential is compatible with confinement realized with a pair of fundamental strings, one linking the gluon to the quark and another linking the same gluon to the antiquark. When the segments are parallel and superposed, the total string tension is larger and agrees with the Casimir scaling measured by Bali. This can be interpreted with a type-II superconductor analogy for the confinement in QCD, with repulsion of the fundamental strings.

Authors:
; ;  [1]
  1. CFTP, Departamento de Fisica, Instituto Superior Tecnico, Avenida Rovisco Pais, 1049-001 Lisboa (Portugal)
Publication Date:
OSTI Identifier:
21250089
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 77; Journal Issue: 9; Other Information: DOI: 10.1103/PhysRevD.77.091504; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BAG MODEL; CASIMIR EFFECT; CONFINEMENT; GLUONS; HADRONS; INTERACTIONS; LATTICE FIELD THEORY; PERIODICITY; POTENTIALS; QUANTUM CHROMODYNAMICS; QUARK-ANTIQUARK INTERACTIONS; SCALING; STRING MODELS; SU-3 GROUPS; THREE-BODY PROBLEM; TYPE-II SUPERCONDUCTORS; WILSON LOOP

Citation Formats

Bicudo, P, Cardoso, M, Oliveira, O, and CFC, Departamento de Fisica, Universidade de Coimbra, Rua Larga, 3004-516 Coimbra. Study of the gluon-quark-antiquark static potential in SU(3) lattice QCD. United States: N. p., 2008. Web. doi:10.1103/PHYSREVD.77.091504.
Bicudo, P, Cardoso, M, Oliveira, O, & CFC, Departamento de Fisica, Universidade de Coimbra, Rua Larga, 3004-516 Coimbra. Study of the gluon-quark-antiquark static potential in SU(3) lattice QCD. United States. doi:10.1103/PHYSREVD.77.091504.
Bicudo, P, Cardoso, M, Oliveira, O, and CFC, Departamento de Fisica, Universidade de Coimbra, Rua Larga, 3004-516 Coimbra. Thu . "Study of the gluon-quark-antiquark static potential in SU(3) lattice QCD". United States. doi:10.1103/PHYSREVD.77.091504.
@article{osti_21250089,
title = {Study of the gluon-quark-antiquark static potential in SU(3) lattice QCD},
author = {Bicudo, P and Cardoso, M and Oliveira, O and CFC, Departamento de Fisica, Universidade de Coimbra, Rua Larga, 3004-516 Coimbra},
abstractNote = {We study the long distance interaction for hybrid hadrons, with a static gluon, a quark and an antiquark with lattice QCD techniques. A Wilson loop adequate to the static hybrid three-body system is developed and, using a 24{sup 3}x48 periodic lattice with {beta}=6.2 and a{approx}0.072 fm, two different geometries for the gluon-quark segment and the gluon-antiquark segment are investigated. When these segments are perpendicular, the static potential is compatible with confinement realized with a pair of fundamental strings, one linking the gluon to the quark and another linking the same gluon to the antiquark. When the segments are parallel and superposed, the total string tension is larger and agrees with the Casimir scaling measured by Bali. This can be interpreted with a type-II superconductor analogy for the confinement in QCD, with repulsion of the fundamental strings.},
doi = {10.1103/PHYSREVD.77.091504},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 9,
volume = 77,
place = {United States},
year = {2008},
month = {5}
}