Project SANC (former CalcPHEP): Support of Analytic and Numeric calculations for experiments at Colliders

The project, aimed at the theoretical support of experiments at modern and future accelerators — TEVATRON, LHC, electron Linear Colliders (TESLA, NLC, CLIC) and muon factories, is presented. Within this project a four-level computer system is being created, which must automatically calculate, at the one-loop precision level the pseudoand realistic observables (decay rates and event distributions) for more and more complicated processes of elementary particle interaction, using the principle of knowledge storing. It was already used for a recalculation of the EW radiative corrections for Atomic Parity Violation [1] and complete one-loop corrections for the process ee → tt̄ [2,3,4]; for the latter an, agreement up to 11 digits with FeynArts and the other results is found. The version of SANC that we describe here is capable of automatically computing the decay rates and the distributions for the decays Z(H, W )→ ff̄ in the one-loop approximation.