“School of Particles And Accelerator”
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| Paper IPM / Particles And Accelerator / 11880 |
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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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