Selected physics measurements for the lhcb experiment and the radiation monitoring system

The LHCb experiment at the Large Hadron Collider (LHC) is dedicated to studies of rare phenomena in b-and c -decays in order to precisely constrain the Standard Model parameters and search for beyond Standard Model signatures. The LHCb detector is fully installed and commissioned; first data from pp collisions are being experienced. Physics performance of the LHCb experiment in constraining Standard Model parameters is illustrated with the expected reach on the CKM angle measurements, B_d,s, mixing phases and the angle γ of unitarity triangle. New physics search in the b-sector is discussed at the examples of rare decays B_s→ μ ⁺ μ ^- and B→ K^*μ ⁺μ^-, as well as photon helicity studies in the B⁰ _s→φγ mode. Radiation level measurement for the silicon inner tracker operation and beam condition monitoring with the Radiation Monitoring System, developed at Kiev Institute for Nuclear Research, are discussed.