Performance of the ATLAS b-tagging Algorithms

The ability to identify jets stemming from the fragmentation and hadronization of b quarks is important for the high-pT physics program of ATLAS: top physics, Higgs boson searches and studies, new phenomena. After an overview of the reconstruction of the key ingredients for b-tagging, the tagging techniques are described. The performance of b-tagging algorithms is then detailed, as well as the impact on performance of several factors and new promising directions. Finally, expected performance in the first data and the anticipated uncertainty with which it can be measured are briefly discussed.