Comprehensive research on the structure of matter in the strong interactions based on QCD

我们用晶格QCD模拟对强相互作用中物质的各种结构进行了全面的研究。我们取得的成就如下：(i)利用电磁相互作用和u-d夸克质量差建立1+1+1味点阵QCD+QED模拟；（ii）基于散射相移测量其ρ(770)介子态的共振能和衰变宽度；（iii）直接构造原子质量数为A≦4的原子核并计算其结合能；（iv）利用有限尺寸标度法分析有限温度和有限密度下QCD的相结构。

We have made a comprehensive investigation on various structures of matters in the strong interactions with lattice QCD simulations. What we have achieved are as follows: (i) development of 1+1+1 flavor lattice QCD+QED simulation with the electro-magnetic interactions and the u-d quark mass difference, (ii) measurement of the resonance energy and the decay width of theρ(770) meson state based on the scattering phase shift, (iii) direct construction of the nuclei with atomic mass number A≦4 and calculation of their binding energies, (iv) analysis of the phase structure of QCD at the finite temperature and finite density employing the finite size scaling method.