Self-energy O(alpha^2) correction to the positronium decay rate

Abstract

Self-energy corrections of order O(alpha^2) to the parapositronium and orthopositronium decay rates are calculated. Numerical values of the corresponding coefficients are B_p=-3.74, B_o=2.02.

Comments: 8 pages, LaTEX, 2 figures, uses linedraw.sty