arXiv:hep-ph/9902276·v2·High Energy Physics — Phenomenology
O(m alpha^7 ln(alpha)^2) corrections to positronium energy levels
Kirill Melnikov🇩🇪 · Alexander Yelkhovsky🇷🇺
Abstract
We present a calculation of the O(m alpha^7 ln(alpha)^2) corrections to positronium energy levels. The result is used to estimate the current uncertainty in theoretical predictions of the positronium spectrum.
Comments: revtex, 12 pages, result corrected