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24 April 2024
 
  » arxiv » hep-lat/0410025

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Lattice QCD Study of the Pentaquark Baryons
T.T.Takahashi ; T.Umeda ; T.Onogi ; T.Kunihiro ;
Date 19 Oct 2004
Subject hep-lat
AbstractWe study the spin $frac12$ hadronic state in quenched lattice QCD to search for a possible $S=+1$ pentaquark resonance. Simulations are carried out on $8^3 imes 24$, $10^3 imes 24$, $12^3 imes 24$ and $16^3 imes 24$ lattices at $eta$=5.7 at the quenched level with the standard plaquette gauge action and Wilson quark action. We adopt two independent operators with I=0 and $J^P=frac12$ to construct a $2 imes 2$ correlation matrix. After the diagonalization of the correlation matrix, we successfully obtain the energies of the ground-state and the 1st excited-state in this channel. The volume dependence of the energies suggests the existence of a possible resonance state slightly above the NK threshold in I=0 and $J^P=frac12^-$ channel.
Source arXiv, hep-lat/0410025
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