期刊
PHYSICAL REVIEW LETTERS
卷 128, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.128.172002
关键词
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资金
- NSFC of China [12125501, 12070131001, 12141501]
- National Key Research and Development Program of China [2020YFA0406400]
- DOE Office of Science Early Career Award [DE-SC0021147]
- DOE [DE-SC0010339]
- DOE Office of Science Facility [DE-AC0206CH11357]
- Office of Science of the U.S. Department of Energy
- U.S. Department of Energy (DOE) [DE-SC0021147] Funding Source: U.S. Department of Energy (DOE)
In this study, a lattice QCD calculation method was developed to calculate the two-photon exchange contribution to the muonic-hydrogen Lamb shift. The calculated results were consistent with previous theoretical results in a range of 20-50 mu 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(pi) = 142 MeV. By adopting the infinite-volume reconstruction method along with an optimized subtraction scheme, we obtain with statistical uncertainty Delta E-TPE = -28.9(4.9) mu eV+ 93.72 mu eV/fm(2).< r(p)(2)>, or Delta E-TPE = 37.4(4.9) mu eV, which is consistent with the previous theoretical results in a range of 20-50 mu eV.
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