Seminarium Teorii Oddziaływań Elementarnych
Sala Duża Teoretyczna (229), ul. Hoża 69
2010-11-08 (13:15) 
Krzysztof Pachucki (IFT UW)
Theory of muonic versus electronic hydrogen Lamb shift
The significant discrepancy between theoretical predictions and the experimental result for the muonic hydrogen by the PSI collaboration questions the basis of QED theory of simple atomic systems. The discrepancy, in terms of the proton charge radius, being of the order of 5%, can not be explained by a mistake in the calculations, because they have been independly verified. It can not be explained by higher order QED corrections because they are orders of magnitude too small, and it can not be explained by a complicated internal structure of the proton, because the proton structure correction can be estimated from the inelastic electron-proton scattering and is 20 times too small. Finally, any exotic type of interactions at this levels of accuracy is ruled out by the muon g-2 measurement. In my talk I will present the QED theory of the muonic hydrogen in comparison to that of the electronic one and critically review solutions of the muonic hydrogen puzzle proposed in the literature.