Algorithms for the Identification of b-Quark Jets with First Data at CMS

This thesis is related to the CMS experiment at the Large Hadron Collider at CERN. The impact of a misaligned silicon tracking detector on the performance of b-quark-jet identification algorithms is studied. The development of a new algorithm which relies on the reconstruction of a secondary decay vertex inside the examined jet and which is almost insensitive to the degree of misalignment is discussed. Thus it is optimised for the initial data taking phase at the experiment.