论文标题
对Muonic-Hydrogen Lamb Shings的减法贡献：晶格QCD计算极化效应的点
The subtraction contribution to the muonic-hydrogen Lamb shift: a point for lattice QCD calculations of the polarizability effect
论文作者
论文摘要
质子可极化性对Muonic-Hydrogen Lamb Shings的贡献是质子电荷半径提取的理论不确定性的主要来源。基于质子结构函数的这种效果的经验评估需要使用晶状体QCD进行系统上改进的“减法函数”计算。我们考虑一个不同的减法点，目的是直接在晶格计算中访问减法功能。该减法点的一个有用特征是抑制了结构函数对羔羊移位的相应贡献。整体效果由减法贡献主导，可以在晶格上计算。
The proton-polarizability contribution to the muonic-hydrogen Lamb shift is a major source of theoretical uncertainty in the extraction of the proton charge radius. An empirical evaluation of this effect, based on the proton structure functions, requires a systematically improvable calculation of the "subtraction function", possibly using lattice QCD. We consider a different subtraction point, with the aim of accessing the subtraction function directly in lattice calculations. A useful feature of this subtraction point is that the corresponding contribution of the structure functions to the Lamb shift is suppressed. The whole effect is dominated by the subtraction contribution, calculable on the lattice.
