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Simultaneous alignment and Lorentz angle calibration in the CMS silicon tracker using Millepede II
Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP 2013)
The CMS silicon tracker consists of 25 684 sensors that provide measurements of trajectories of charged particles that are used by almost every physics analysis performed by CMS. In order to achieve high measurement precision, the positions and orientations of all sensors have to be determined very accurately. This is achieved by track-based alignment using the global fit approach of the Millepede II program. This approach is capable of determining about 200 000 parameters simultaneously. Thedoi:10.22323/1.180.0074 fatcat:g2uio2ecejekdjgrn6tfdxchy4