H-Dibaryon from Lattice QCD with Improved Anisotropic Actions

Zhi-Huan Luo; Mushtaq Loan; Xiang-Qian Luo

doi:10.1142/S0217732307023171

paper

H-Dibaryon from Lattice QCD with Improved Anisotropic Actions

arXiv:0803.3171 · doi:10.1142/S0217732307023171

Abstract

The six quark state(uuddss) called H dibaryon( $J^{P} = 0^{+}$ , $S = - 2$ ) has been calculated to study its existence and stability. The simulations are performed in quenched QCD on $8^{3} \times 24$ and $1 6^{3} \times 48$ anisotropic lattices with Symanzik improved gauge action and Clover fermion action. The gauge coupling is $β = 2.0$ and aspect ratio $ξ = a_{s} / a_{t} = 3.0$ . Preliminary results indicate that mass of H dibaryon is 2134(100)Mev on $8^{3} \times 24$ lattice and 2167(59)Mev on $1 6^{3} \times 48$ respectively. It seems that the radius of H dibaryon is very large and the finite size effect is very obvious.