Spectral representation for on-shell massless double box
A method is presented for obtaining the $ε$-expansion for on-shell massless scalar double-box diagram.
hep-ph↗
arXiv subjects
N. I. Ussyukina
Publications and source records attributed to N. I. Ussyukina.
Threshold and pseudothreshold values of the sunset diagram
Analytic results for the threshold and pseudothreshold values of the sunset diagram with arbitrary masses are obtained in terms of dilogarithms of ratios of the masses.
hep-ph↗
New results for two-loop off-shell three-point diagrams
A number of exact results for two-loop three-point diagrams with massless internal particles and arbitrary (off-shell) external momenta are presented. Divergent contributions are calculated in the framework of dimensional regularization.
hep-ph↗
Some Exact Results for Two-Loop Diagrams with Three and Four External Lines
Evaluation of three- and four-point diagrams with massless internal particles and arbitrary external momenta is considered. Exact results for some two-loop diagrams (planar and non-planar three-point contributions and the "double box" diagram) are obtained in terms of polylogarithms.
hep-ph↗