CMS tracking performance results from early LHC operation

• Main Authors: CMS Collaboration (Author), Alver, Burak Han (Contributor), Bauer, Gerry P (Contributor), Bendavid, Joshua L. (Contributor), Busza, Wit (Contributor), Butz, Erik M. (Contributor), Cali, Ivan Amos (Contributor), Chan, Matthew Hans (Contributor), D'Enterria, David (Contributor), Everaerts, Pieter Bruno Bart (Contributor), Gomez-Ceballos, Guillelmo (Contributor), Goncharov, Maxim (Contributor), Hahn, Kristian Allan (Contributor), Harris, Philip Coleman (Contributor), Kim, Yongsun (Contributor), Klute, Markus (Contributor), Lee, Yen-Jie (Contributor), Li, Wei (Contributor), Loizides, Constantinos (Contributor), Luckey Jr, P David (Contributor), Ma, Teng (Contributor), Nahn, Steven (Contributor), Paus, Christoph M. E. (Contributor), Roland, Christof E (Contributor), Roland, Gunther M (Contributor), Rudolph, Matthew Scott (Contributor), Stephans, George S. F. (Contributor), Sumorok, Konstanty C (Contributor), Sung, Kevin Kai Hong (Contributor), Wenger, Edward Allen (Contributor), Wyslouch, Boleslaw (Contributor), Xie, Si (Contributor), Yang, Ming (Contributor), Yilmaz, Yetkin (Contributor), Yoon, A. S. (Contributor), Zanetti, Marco (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Physics (Contributor), Massachusetts Institute of Technology. Laboratory for Nuclear Science (Contributor)
• Format: Article
• Language: English
• Published: Springer-Verlag, 2018-06-20T17:49:54Z.
• Subjects: Article
• Online Access: Get fulltext

The first LHC pp collisions at centre-of-mass energies of 0.9 and 2.36 TeV were recorded by the CMS detector in December 2009. The trajectories of charged particles produced in the collisions were reconstructed using the all-silicon Tracker and their momenta were measured in the 3.8 T axial magnetic field. Results from the Tracker commissioning are presented including studies of timing, efficiency, signal-to-noise, resolution, and ionization energy. Reconstructed tracks are used to benchmark the performance in terms of track and vertex resolutions, reconstruction of decays, estimation of ionization energy loss, as well as identification of photon conversions, nuclear interactions, and heavy-flavour decays.