151 citations · 714 across the 13 of their papers we have counts for
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hep-ph1999
Decays of Positronium
Andrzej Czarnecki, Savely G. Karshenboim
We briefly review the theoretical and experimental results concerning decays of positronium. Possible solutions of the "orthopositronium lifetime puzzle" are discussed. Positronium…
hep-ph1999
Recent results with heavy quarks and light lepton bound states
Andrzej Czarnecki, Kirill Melnikov, Alexander Yelkhovsky
Recent results on second order quantum corrections to semileptonic decays of b quarks and positronium spectroscopy are reviewed. Similarities between calculations in these seemingl…