Two-baryon potentials and H-dibaryon from 3-flavor lattice QCD simulations

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• 作者：HAL QCD Collaboration ; Takashi Inoue^a ; ^{inoue.takashi@nihon-u.ac.jp} ; Sinya Aoki^b ; ^c ; Takumi Doi^d ; Tetsuo Hatsuda^e ; ^f ; Yoichi Ikeda^g ; Noriyoshi Ishii^c ; Keiko Murano^f ; Hidekatsu Nemura^c ; Kenji Sasaki^c
• 关键词：Baryon interaction ; Hyperon interaction ; H-dibaryon ; Lattice QCD
• 刊名：Nuclear Physics A
• 出版年：2012
• 期刊代码：44_03759474
• 类别：ph
• 出版时间：1 May, 2012
• 卷：881
• 期：Complete
• 页码：28-43
• 文件大小：1069 K

摘要

Baryon-baryon potentials are obtained from 3-flavor QCD simulations with the lattice volume , the lattice spacing , and the pseudo-scalar-meson mass . The NN scattering phase-shifts and the mass of H-dibaryon in the flavor limit are extracted from the resultant potentials by solving the Schr枚dinger equation. The NN phase-shifts in the limit is shown to have qualitatively similar behavior as the experimental data. A bound H-dibaryon in the limit is found to exist in the flavor-singlet channel with the binding energy of about 26 MeV for the lightest quark mass . Effect of flavor symmetry breaking on the H-dibaryon is estimated by solving the coupled-channel Schr枚dinger equation for with the physical baryon masses and the potential matrix obtained in the limit: a resonant H-dibaryon is found between 螞螞 and N螢 thresholds in this treatment.