Two-baryon potentials and H-dibaryon from 3-flavor lattice QCD simulations
Two-baryon potentials and H-dibaryon from 3-flavor lattice QCD simulations
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DOI：
10.1016/j.nuclphysa.2012.02.008
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发表时间：
2012-05-01
影响因子：
1.4
通讯作者：
Sasaki, Kenji
中科院分区：
文献类型：
--
作者：
Inoue, Takashi;Aoki, Sinya;Sasaki, Kenji
重子重子势由三味QCD模拟得到，晶格体积L等于或等于4fm，晶格间距等于或等于0.12fm，赝标量介子质量M-PS=469-1171 MeV。通过求解薛定谔方程，从所得到的势中提取了味觉SU(3)极限中的NN散射相移和H-双重子的质量。在SU(3)极限下的NN相移与实验数据具有定性相似的行为。在最轻夸克质量M-PS=469 MeV的味态单重态J(P)=0(+)通道中，发现SU(3)极限下的束缚H-双重子的结合能约为26 MeV。通过求解具有物理重子质量的Lambda Lambda-N xi Sigma耦合沟道薛定谔方程和在SU(3)极限下得到的势矩阵，估计了风味SU(3)对称性破缺对H-双重子的影响：在这种处理中，Lambda和N-xi阈值之间存在一个共振的H-双重子。(C)2012爱思唯尔B.V.保留所有权利。
Baryon baryon potentials are obtained from 3-flavor QCD simulations with the lattice volume L similar or equal to 4 fm, the lattice spacing a similar or equal to 0.12 fm, and the pseudo-scalar-meson mass M-ps = 469-1171 MeV. The NN scattering phase-shifts and the mass of H-dibaryon in the flavor SU(3) limit are extracted from the resultant potentials by solving the Schrodinger equation. The NN phase-shifts in the SU (3) limit is shown to have qualitatively similar behavior as the experimental data. A bound H-dibaryon in the SU (3) limit is found to exist in the flavor-singlet J(P) = 0(+) channel with the binding energy of about 26 MeV for the lightest quark mass M-ps = 469 MeV. Effect of flavor SU(3) symmetry breaking on the H-dibaryon is estimated by solving the coupled-channel Schrodinger equation for Lambda Lambda-N Xi Sigma with the physical baryon masses and the potential matrix obtained in the SU(3) limit: a resonant H-dibaryon is found between Lambda Lambda and N Xi thresholds in this treatment. (C) 2012 Elsevier B.V. All rights reserved.