标题： Upsilon谱从具有2+1味动态夸克的格点QCD 显示英文标题

标题： The Upsilon Spectrum from Lattice QCD with 2+1 Flavors of Dynamical Quarks

摘要： 我们描述了在包含2+1味动态夸克的MILC配置上获得的底强子谱。 我们还与在MILC配置上的冻结和2味结果进行了比较。 我们表明，使用不同量确定的格点间距显示出与2+1味明显收敛的迹象，并以Upsilon粒子的第一激发态与基态的比值形式给出了轻子宽度和超精细分裂的结果。 显示英文摘要

摘要： We describe the bottomonium spectrum obtained on the MILC configurations which incorporate 2+1 flavors of dynamical quarks. We compare to quenched and 2 flavor results also on MILC configurations. We show that the lattice spacing determination using different quantities shows clear signs of convergence with 2+1 flavors and give results for the leptonic width and hyperfine splitting, in the form of the ratio of the 1st excited state of the Upsilon to that of the ground state.