Orthopositronium lifetime: analytic results in O(alpha) and O(alpha3lnalpha).
We present the O(alpha) and O(alpha3lnalpha) corrections to the total decay width of orthopositronium in closed analytic form, in terms of basic irrational numbers, which can be evaluated numerically to arbitrary precision.
Kniehl
Bernd A
BA
II. Institut für Theoretische Physik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany. kniehl@desy.de
Kotikov
Anatoly V
AV
Veretin
Oleg L
OL