Lattice QCD study for confinement in hadrons

H. Suganuma, T. Iritani, F. Okiharu, T. T. Takahashi, A. Yamamoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)


We study three subjects on quark confinement in hadrons in SU(3)c lattice QCD. From the accurate lattice calculation for more than 300 different patterns of three-quark (3Q) systems, we find that the static 3Q potential is well described by Y-Ansatz, i.e., the Coulomb plus Y-type linear potential. We also study the multi-quark (4Q, 5Q) potentials in lattice QCD, and find that they are well described by the one-gluon-exchange (OGE) Coulomb plus string-theoretical linear potential, which supports the infrared string picture even for the multi-quarks. The second subject is a lattice-QCD determination of the relevant gluonic momentum component for confinement. The string tension (confining force) is found to be almost unchanged even after cutting off the high-momentum gluon component above 1.5GeV in the Landau gauge. In fact, quark confinement originates from the low-momentum gluon below about 1.5GeV. Finally, we consider a possible gauge of QCD for the quark potential model, by investigating "instantaneous inter-quark potential" in generalized Landau gauge, which describes a continuous change from the Landau gauge to the Coulomb gauge.

Original languageEnglish
Title of host publicationInternational Conference on the Structure of Baryons, BARYONS'10
Number of pages7
Publication statusPublished - 24 Nov 2011
EventInternational Conference on the Structure of Baryons, BARYONS'10 - Osaka, Japan
Duration: 7 Dec 201011 Dec 2010

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


ConferenceInternational Conference on the Structure of Baryons, BARYONS'10


  • confinement
  • lattice QCD
  • multi-quarks
  • quark potential model
  • string picture

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    Suganuma, H., Iritani, T., Okiharu, F., Takahashi, T. T., & Yamamoto, A. (2011). Lattice QCD study for confinement in hadrons. In International Conference on the Structure of Baryons, BARYONS'10 (pp. 195-201). (AIP Conference Proceedings; Vol. 1388).