Two-photon exchange correction to 2 S -2 P splitting in muonic 3 He ions
Two-photon exchange correction to 2 S -2 P splitting in muonic 3 He ions
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DOI：
10.1103/physreva.95.012506
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发表时间：
2016-11
影响因子：
2.9
通讯作者：
C. Carlson;M. Gorchtein;M. Vanderhaeghen
中科院分区：
文献类型：
--
作者：
C. Carlson;M. Gorchtein;M. Vanderhaeghen
在色散关系框架下计算了μ子氦-3离子兰姆位移的双光子交换修正。部分工作是对电子-氦准弹性散射数据集进行解析拟合，以便进行色散积分。结果表明，双光子交换效应使2$S$态的能量下移了15.14（49）meV，这与用势模型和有效场论计算的结果雅阁.
We calculate the two-photon exchange correction to the Lamb shift in muonic helium-3 ions within the dispersion relations framework. Part of the effort entailed making analytic fits to the electron-$^3$He quasielastic scattering data set, for purposes of doing the dispersion integrals. Our result is that the energy of the 2$S$ state is shifted downwards by two-photon exchange effects by 15.14(49) meV, in good accord with the result obtained from a potential model and effective field theory calculation.