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O(m alpha7 ln(alpha)2) corrections to positronium energy levels

Kirill Melnikov, Alexander Yelkhovsky

hep-pharXiv:hep-ph/9902276

Abstract

We present a calculation of the O(m alpha7 ln(alpha)2) corrections to positronium energy levels. The result is used to estimate the current uncertainty in theoretical predictions of the positronium spectrum.

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