====== TTP99-24 Virtual annihilation contribution to orthopositronium decay rate ======
 
 
   <hidden 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. 
 </hidden>
|**Gregory Adkins, Kirill Melnikov and Alexander Yelkhovsky**  | 
|**  Phys. Rev.  A60 3306 1999  **  |
| {{preprints:1999:ttp99-24.pdf|PDF}} {{preprints:1999:ttp99-24.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/9905553|arXiv]]   |
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