CSSM and CoEPP, School of Chemistry and Physics, University of Adelaide, Adelaide SA 5005, Australia.
Phys Rev Lett. 2011 Aug 26;107(9):092004. doi: 10.1103/PhysRevLett.107.092004. Epub 2011 Aug 24.
Recent lattice QCD calculations have reported evidence for the existence of a bound state with strangeness -2 and baryon number 2 at quark masses somewhat higher than the physical values. By developing a description of the dependence of this binding energy on the up, down and strange quark masses that allows a controlled chiral extrapolation, we explore the hypothesis that this state is to be identified with the H dibaryon. Taking as input the recent results of the HAL and NPLQCD Collaborations, we show that the H dibaryon is likely to be unbound by 13±14 MeV at the physical point.
最近的格点 QCD 计算报告了在稍高于物理值的夸克质量下存在具有奇异数-2 和重子数 2 的束缚态的证据。通过开发一种描述该束缚能对上夸克、下夸克和奇异夸克质量的依赖性的描述，允许进行受控的手征外推，我们探索了这样一种假设，即该状态与 H 双介子相符合。利用 HAL 和 NPLQCD 合作组织的最新结果作为输入，我们表明在物理点，H 双介子很可能是未束缚的，其宽度约为 13±14 MeV。
