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Energy Dependence of the Transverse Momentum Distributions of Charged Particles in pp Collisions Measured by ALICE

Abstract : Differential cross sections of charged particles in inelastic pp collisions as a function of p_T have been measured at sqrt(s) = 0.9, 2.76 and 7 TeV at the LHC. The p_T spectra are compared to NLO-pQCD calculations. Though the differential cross section for an individual sqrt(s) cannot be described by NLO-pQCD, the relative increase of cross section with sqrt(s) is in agreement with NLO-pQCD. Based on these measurements and observations, procedures are discussed to construct pp reference spectra at sqrt(s) = 2.76 and 5.02 TeV up to p_T = 50 GeV/c as required for the calculation of the nuclear modification factor in nucleus-nucleus and proton-nucleus collisions.
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http://hal.in2p3.fr/in2p3-00841160
Contributor : Sylvie Flores <>
Submitted on : Thursday, July 4, 2013 - 7:36:56 AM
Last modification on : Thursday, November 19, 2020 - 12:58:50 PM

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B. Abelev, Laurent Aphecetche, Y.W. Baek, A. Baldisseri, V. Barret, et al.. Energy Dependence of the Transverse Momentum Distributions of Charged Particles in pp Collisions Measured by ALICE. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2013, 73, pp.2662. ⟨10.1140/epjc/s10052-013-2662-9⟩. ⟨in2p3-00841160⟩

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