TTP - TTP99-24 Virtual annihilation contribution to orthopositronium decay rate

Institute for Theoretical Particle Physics (TTP)

Order alpha^2 contribution to the orthopositronium decay rate due to one-photon virtual annihilation is found to be delta Gamma = (alpha/pi)^2 (pi^2 ln(alpha) - 0.8622(9))Gamma_LO.

Gregory Adkins, Kirill Melnikov and Alexander Yelkhovsky

Phys. Rev. A60 3306 1999

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TTP99-24 Virtual annihilation contribution to orthopositronium decay rate

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