We present a new, simplified analysis of the low-energy electron-positron interaction, and use the resulting effective theory to calculate the binding effects that contribute to the decay rate Γ of orthopositronium through O(α3ln αΓ). We express the total decay rate in terms of the annihilation rate for a free electron and positron at threshold, which has just recently been computed to sufficient precision. Our O(α2Γ) result corrects errors in a previous analysis.
|Number of pages||5|
|Journal||Physical review D|
|State||Published - Dec 1 2000|
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)