B-physics potential of ATLAS: an update

The B-physics potential of the ATLAS experiment at LHC is described. Simulation results are shown for the measurement of sin 2β, with an emphasis on new tagging techniques. Other CP-violation measurements are described briefly. New limits are shown for the reach of the xs-measurement, resulting from increased statistics and improved fitting methods. Some rare decay modes of B-mesons can be easily seen in ATLAS. Analyses of channels B → μ+μ− (X) are presented here.