Hyperfine splitting in positronium to O(α(7)m(e)): one photon annihilation contribution.
We present the complete result for the O(α7me) one photon annihilation contribution to the hyperfine splitting of the ground state energy levels in positronium. Numerically it increases the prediction of quantum electrodynamics by 217±1  kHz.
Department of Physics, University of Alberta, Edmonton, Alberta T6G 2J1, Canada.
M
M
Baker
Deutsches Elektronen Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, Germany.
P
P
Marquard
Department of Physics, University of Alberta, Edmonton, Alberta T6G 2J1, Canada and Institut für Theoretische Teilchenphysik, Karlsruhe Institute of Technology, 76128 Karlsruhe, Germany.
A A
AA
Penin
Physik Department, Technische Universität München, 85748 Garching, Germany and Institut für Theoretische Teilchenphysik und Kosmologie, RWTH Aachen, 52056 Aachen, Germany.
J
J
Piclum
Institut für Theoretische Teilchenphysik, Karlsruhe Institute of Technology, 76128 Karlsruhe, Germany.
M
M
Steinhauser