This Lamb shift is a result of the interactions between the electron and the constituent quarks of the proton as described by QED.
兰姆位移是电子与质子组分夸克相互作用的结果，这一现象被描述为量子电动力（QED）。
2
These interactions are slightly different for electrons occupying the 2s and 2p energy levels and the resulting energy shift depends in part on the radius of the proton.
这些相互作用对于占据2s和2p能级的电子有微小的不同，他们的能量位移部分的依赖于质子的半径。
3
However, in muonic hydrogen the Lamb shift is much more dependent on the proton radius because the much heavier muon spends more time very near to – and often within – the proton itself.