Search for new physics in the B-sector at the LHC

A set of key measurements of B decays which have the potential to uncover New Physics at the LHC is discussed. Together with the general purpose detectors ATLAS and CMS, the LHCb detector, which is devoted to B physics, can study these effects precisely. Due to the large bb cross section at 14 TeV, LHCb has access to 10^12 B meson decays per year. This allows significant measurements of even very rare B decays and, in particular, the precision study of the B_s system.