The Impact of Inner Detector Misalignments on Selected Physics

Many physics analyses at ATLAS are dependent on the delivery of high quality tracking performance from the Inner Detector. This performance can be substantially degraded by misalignments of the Inner Detector modules which are not corrected for by the alignment procedure. In this note we show results from a number of studies into the impact of misalignments of the Inner Detector on physics and performance. Both random and global systematic misalignments of the Inner Detector are used in these studies. Their impact on Z->mumu reconstruction using Inner Detector tracks, B-physics observables and Tau identification and rejection performance are investigated.