O. Veretin

activity

19992009

most citedStrong-Coupling Constant with Flavor Thresholds at Five Loops in the MS-bar Scheme

129 citations · 262 across the 6 of their papers we have counts for

collaborators

Showing 2008Show all

2 papers · 1 filter

hep-ph2008★ 4 cited

Irrational constants in positronium decays

B. A. Kniehl, A. V. Kotikov, O. L. Veretin

We establish irrational constants, that contribute to the positronium lifetime at $O (α)$ and $O (α^{2})$ order. In particular we show, that a new type of constants appear, which are n…

hep-ph2008★ 22 cited

Orthopositronium lifetime: analytic results in O(alpha) and O(alpha^3 ln(alpha))

Bernd A. Kniehl, Anatoly V. Kotikov, Oleg L. Veretin

We present the O(alpha) and O(alpha^3 ln(alpha)) corrections to the total decay width of orthopositronium in closed analytic form, in terms of basic transcendental numbers, which c…