Order alpha(2) corrections to the decay rate of orthopositronium
Order alpha(2) corrections to the decay rate of orthopositronium are calculated in the framework of nonrelativistic QED. The resulting contribution is found to be in significant disagreement with one set of experimental measurements, though another experiment is in agreement with theory.
Adkins
GS
Franklin and Marshall College, Lancaster, Pennsylvania 17604, USA.
Fell
RN
Sapirstein
J