Lattice QCD Study for the Interquark Force in Three-Quark and Multi-Quark Systems

Details Lattice QCD Study for the Interquark Force in Three-Quark and Multi-Quark Systems Lattice QCD Study for the Interquark Force in Three-Quark and Multi-Quark Systems

2004-12-19

arxiv.org/abs/hep-lat/0412026v1

Physics

High Energy Physics

High Energy Physics - Lattice

Invited talk at Int. Conference on Quark Confinement and the Hadron Spectrum 6, Sardinia, Italy, 21-25 Sep 2004

Scientific paper

10.1063/1.1920939

We study the three-quark and multi-quark potentials in SU(3) lattice QCD. From the accurate calculation for more than 300 different patterns of 3Q systems, the static ground-state 3Q potential $V_{\rm 3Q}^{\rm g.s.}$ is found to be well described by the Coulomb plus Y-type linear potential (Y-Ansatz) within 1%-level deviation. As a clear evidence for Y-Ansatz, Y-type flux-tube formation is actually observed on the lattice in maximally-Abelian projected QCD. For about 100 patterns of 3Q systems, we perform the accurate calculation for the 1st excited-state 3Q potential $V_{\rm 3Q}^{\rm e.s.}$ by diagonalizing the QCD Hamiltonian in the presence of three quarks, and find a large gluonic-excitation energy $\Delta E_{\rm 3Q} \equiv V_{\rm 3Q}^{\rm e.s.}-V_{\rm 3Q}^{\rm g.s.}$ of about 1 GeV, which gives a physical reason of the success of the quark model. $\Delta E_{\rm 3Q}$ is found to be reproduced by the ``inverse Mercedes Ansatz'', which indicates a complicated bulk excitation for the gluonic-excitation mode. We study also the tetra-quark and the penta-quark potentials in lattice QCD, and find that they are well described by the OGE Coulomb plus multi-Y type linear potential, which supports the flux-tube picture even for the multi-quarks. Finally, the narrow decay width of penta-quark baryons is discussed in terms of the QCD string theory.

Affiliated with

Also associated with

No associations

Rating

Lattice QCD Study for the Interquark Force in Three-Quark and Multi-Quark Systems does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Lattice QCD Study for the Interquark Force in Three-Quark and Multi-Quark Systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lattice QCD Study for the Interquark Force in Three-Quark and Multi-Quark Systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-16783