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