ИСТИНА

The team leader M.~Dubinin and the team member P.~Baikov, are related to new physics phenomena beyond the Standard Model at the LHC (Large Hadronic Collider) and high precision physics at the ILC (next International Linear Collider). Members of INP MSU group M.~Dubinin and P.~Baikov developed a research activity in the two different fields.

M.~Dubinin considered the problem of explicit CP violation in the minimal supersymmetric standard model (in the literature such class of models is also known as complex MSSM) and investigated the phenomenological consequences of explicit CP violation in the two-doublet Higgs sector for the LHC project (collaborations CMS and LHC-B). MSSM with complex parameters in front of various Lagrangian terms, which are a convolutions of multiplets for internal symmetries (e.g. weak isospin symmetry), is a neccesary generalisation since the phases of MSSM Lagrangian terms can not be removed, generally speaking, by a redifinition of the fields. Such Lagrangians are not CP invariant and deserve a careful study representing a new source of CP violation beyond the ortodox Cabibbo-Kobayashi-Maskawa (CKM) mechanism. New sources of CP violation in gauge theories attract much attention in latest years because the CKM mechanism only, being phenomenologically successful for the description of CP violation in $K_0$ and $B_0$ meson systems, is not satisfactory in other aspects. For example, CKM mechanism is not sufficient for generation of the baryonic assymmetry of Universe in the course of cosmological evolution. B.~Baikov developed a new method of multiloop calculations in QCD [B3], which essentially increases the accuracy of the theoretical predictions. A collection of new results in the multiloop calculations has been obtained.