The current theoretical status of the Lamb shift in He is discussed. Recent calculations of twoloop binding corrections to the Lamb shift significantly shift the theoretical value of the “classic” Lamb shift in He, i.e. of the 2S1/2–2P1/2-interval. In this brief research note, we present a new (theoretical) value for this interval which reads 14041.474(42) Mhz. The theoretical uncertainty is re...

The maximal acceleration corrections to the Lamb shift of one– electron atoms are calculated in a non–relativistic approximation. They are compatible with experimental results, are in particularly good agreement with the 2S − 2P Lamb shift in hydrogen and reduce by ∼ 50% the experiment-theory discrepancy for the 2S − 2P shift in He. PACS: 04.90.+e, 12.20.Ds.

The maximal acceleration corrections to the Lamb shift of one{ electron atoms are calculated in a non{relativistic approximation. They are compatible with experimental results, are in particularly good agreement with the 2S 2P Lamb shift in hydrogen and reduce by 50% the experiment-theory discrepancy for the 2S 2P shift in He. PACS: 04.90.+e, 12.20.Ds.

We propose to adopt the precisely measured anomalous magnetic moment and Lamb shift as tests for the possible existence of the radiatively induced Lorentz and CPT violation effects in quantum electrodynamics. To this end we calculate the one-loop vacuum polarization tensor and vertex radiative correction in dimensional reduction and on-shell renormalization scheme. We then explicitly show how t...