Order corrections to hydrogen P levels
arXiv:hep-ph/9409322
Abstract
The order shift of hydrogen P levels is found. The corrections are predominantly of relativistic origin. Our approach is a straightforward extension of that developed and applied by us previously to positronium P levels. The corrections to the Lamb shift in hydrogen constitute numerically δE(2 P_{1/2})=0.55 kHz, δE(2 P_{3/2}) =0.44 kHz.
LaTeX, 11 pages, BudkerINP-94-79