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  • “School of Particles”

     
    Paper   IPM / Particles / 11517
       School of Particles and Accelerator
      Title: CMS Tracking Performance Results from Early LHC Operation
      Author(s):
    1 . Hessamaddin Arfaei
    2 . Hamed Bakhshiansohi
    3 . Ali Fahim
    4 . Majid Hashemi
    5 . Abideh Jafari
    6 . Mojtaba Mohammadi Najafabadi
    7 . Saeid Paktinat
    8 . Batool Safarzadeh
    9 . Maryam Zeinali
      Status: Published
      Journal: Eur. Phys. J. C
      Vol.: 70
      Year: 2010
      Pages: 1165-1192
      Supported by: IPM
      Abstract:
    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.

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