# Charged particle transverse momentum spectra in pp collisions at sqrt(s) = 0.9 and 7 TeV

7 CMS
IP2I Lyon - Institut de Physique des 2 Infinis de Lyon
Abstract : The charged particle transverse momentum (pT) spectra are presented for pp collisions at sqrt(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 inverse microbarns and 2.96 inverse picobarns, respectively. Calorimeter-based high-transverse-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 = 2 pT/sqrt(s) 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.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00587101
Contributor : Dominique Girod <>
Submitted on : Tuesday, April 19, 2011 - 2:20:09 PM
Last modification on : Wednesday, January 6, 2021 - 6:44:02 PM

### Citation

S. Chatrchyan, D. Sillou, M. Besancon, S. Choudhury, M. Dejardin, et al.. Charged particle transverse momentum spectra in pp collisions at sqrt(s) = 0.9 and 7 TeV. Journal of High Energy Physics, Springer, 2011, 8, pp.086. ⟨10.1007/JHEP08(2011)086⟩. ⟨in2p3-00587101⟩

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