205 citations
- Institute of Physics and TechnologyKZ15 papers
- Center for Astrophysics Harvard & SmithsonianUS4 papers
- Damghan UniversityIR4 papers
- Joint Institute for Nuclear ResearchRU4 papers
- Search for Extraterrestrial IntelligenceUS4 papers
- University of OxfordGB4 papers
- Bellevue Hospital CenterUS3 papers
- Erzincan Binali Yıldırım UniversityTR3 papers
- Evgeni Kharadze Georgian National Astrophysical ObservatoryGE3 papers
- Fesenkov Astrophysical InstituteKZ3 papers
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- Indian Statistical InstituteIN3 papers
4 papers · 1 filter
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 and order. In particular we show, that a new type of constants appear, which are n…
Two-Loop Formfactors in Theories with Mass Gap and Z-Boson Production
A. Kotikov, J. H. Kuhn, O. Veretin
The two-loop formfactor both for a U(1)xU(1) and a SU(2)xU(1) gauge theory with massive and massless gauge bosons respectively is evaluated at arbitrary momentum transfer q^2. The…
Two-loop sunset diagrams with three massive lines
B. A. Kniehl, A. V. Kotikov, A. Onishchenko +1
In this paper, we consider the two-loop sunset diagram with two different masses, m and M, at spacelike virtuality q^2 = -m^2. We find explicit representations for the master integ…
Analytic approach to the complete set of QED corrections to fermion pair production in e+e- annihilation
D. Bardin, M. Bilenky, A. Chizhov +4
We present the convolution integral for fermion pair production in the electroweak standard theory to order O(alpha) including also soft photon exponentiation. The result is comple…