论文标题
晶格QCD计算两光子交换对Muonic-Hydrogen Lamb Shings的贡献
Lattice QCD calculation of the two-photon exchange contribution to the muonic-hydrogen Lamb shift
论文作者
论文摘要
我们开发了一种晶格QCD计算两光子交换对Muonic-Hydrogen羔羊移位的贡献的方法。为了证明其可行性，我们以$m_π= 142 $ MEV的规格集合介绍了第一个晶格计算。通过采用无限量重建方法以及优化的减法方案，我们获得了$δe_ {\ text {tpe}} = -28.9（4.9）〜μ \ text {ev} + text {ev} + 93.72〜μ \ text {ev}或$Δe_ {\ text {tpe}} = 37.4（4.9）〜μ $ eV，这与先前的理论结果一致，范围为20-50 $μ$ eV。
We develop a method for lattice QCD calculation of the two-photon exchange contribution to the muonic-hydrogen Lamb shift. To demonstrate its feasibility, we present the first lattice calculation with a gauge ensemble at $m_π= 142$ MeV. By adopting the infinite-volume reconstruction method along with an optimized subtraction scheme, we obtain $ΔE_{\text{TPE}} = -28.9(4.9)~μ\text{eV} + 93.72~μ\text{eV}/\text{fm}^2 \cdot\langle r_p^2 \rangle$, or $ΔE_{\text{TPE}} = 37.4(4.9)~μ$eV, which is consistent with the previous theoretical results in a range of 20-50 $μ$eV.
