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  • “School of Particles”

     
    Paper   IPM / Particles / 11880
       School of Particles and Accelerator
      Title: Charged particle transverse momentum spectra in pp collisions at p sqrt(s) = 0.9 and 7 TeV
      Author(s):
    1 . Hessamadin Arfaei
    2 . Hamed Bakhshiansohi
    3 . Seyed Mohsen Etesami
    4 . Ali Fahim
    5 . Majid Hashemi
    6 . Abideh Jafari
    7 . Mohsen Khakzad
    8 . A Mohammadi
    9 . Mojtaba Mohammadi Najafabadi
    10 . Saeid Paktinat Mehdiabadi
    11 . Batool Safarzadeh
    12 . Maryam Zeinali
      Status: Published
      Journal: JHEP
      No.: 086
      Vol.: 1108
      Year: 2011
      Supported by: IPM
      Abstract:
    The charged particle transverse momentum (pT) spectra are presented for pp collisions at aqrt(s) = 0.9 and 7 TeV. The data samples were collected with the CMS detector at the LHC and correspond to integrated luminosities of 231 mb1 and 2.96 pb(-1), respectively. Calorimeter-based high- ransverse-energy triggers are employed to enhance the statistical reach of the high-pT measurements. The results are compared with both leading-order QCD and with an empirical scaling of measurements at different collision energies using the scaling variable xT  2pT/ps over the pT range up to 200 GeV/c. Using a combination of xT scaling and direct interpolation at fixed pT,a reference transverse momentum spectrum at sqrt(s) = 2.76 TeV is constructed, which can be used for studying high-pT particle suppression in the dense QCD medium produced in heavy-ion collisions at that centre-of-mass energy

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