Abstract
This Report summarises the alignment strategy of the CMS detector. Track reconstruction in the silicon tracker and muon chambers is briefly described. We then present the different sources of alignment information, in particular alignment algorithms using reconstructed tracks.
Highlights
The performance of track reconstruction is intimately related to the alignment of the tracking devices
Only track-based alignment will allow to achieve the ultimate alignment of the two tracking systems of CMS: the silicon tracker and the external muon chambers, presented below
The barrel region is separated into an outer part (TOB), and inner part (TIB) and the pixel barrel layers (TPB) closest to the beam
Summary
The performance of track reconstruction is intimately related to the alignment of the tracking devices. A precise knowledge of the position of the various sensitive volumes is, crucial to obtain ultimate resolution on track parameters. Only track-based alignment will allow to achieve the ultimate alignment of the two tracking systems of CMS: the silicon tracker and the external muon chambers, presented below. Combining this information, together with various samples of reconstructed tracks, defines the alignment strategy of CMS. (More details can be found in [1].) The alignment strategy is presented in Section 3. (More details can be found in [1].)
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