Virtual annihilation contribution to orthopositronium decay rate
Gregory Adkins, Kirill Melnikov, Alexander Yelkhovsky
TL;DR
This paper calculates the order alpha^2 correction to orthopositronium decay rate from virtual annihilation, providing a precise theoretical contribution to understanding positronium decay processes.
Contribution
It introduces a detailed calculation of the virtual annihilation contribution at order alpha^2 to the orthopositronium decay rate, which was previously not explicitly computed.
Findings
Derived the correction term delta Gamma with explicit dependence on alpha
Quantified the virtual annihilation contribution as a significant correction
Enhanced the theoretical precision of orthopositronium decay rate predictions
Abstract
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.
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