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Evaluating multiloop Feynman integrals by Mellin-Barnes representation
V. A. Smirnov
The status of analytical evaluation of double and triple box diagrams is characterized. The method of Mellin-Barnes representation as a tool to evaluate master integrals in these p…
Analytical Evaluation of Dimensionally Regularized Massive On-Shell Double Boxes
G. Heinrich, V. A. Smirnov
The method of Mellin-Barnes representation is used to calculate dimensionally regularized massive on-shell double box Feynman diagrams contributing to Bhabha scattering at two loop…
Two-Loop Sudakov Form Factor in a Theory with Mass Gap
Bernd Feucht, Johann H. Kühn, Alexander A. Penin +1
The two-loop Sudakov form factor is computed in a U(1) model with a massive gauge boson and a model with mass gap. We analyze the result in the context of hard an…
Splitting from Nonrelativistic Renormalization Group
A. A. Penin, A. Pineda, V. A. Smirnov +1
We compute the hyperfine splitting in a heavy quarkonium composed of different flavors in next-to-leading logarithmic approximation using the nonrelativistic renormalization group.…