Charged particle transverse momentum spectra in pp collisions at √s = 0:9 and 7 TeV
Journal
Journal of High Energy Physics
Journal Volume
2011
Journal Issue
8
Date Issued
2011
Abstract
The charged particle transverse momentum (p T ) spectra are presented for pp collisions at 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 b -1 and 2.96 pb -1 , respectively. Calorimeter-based high-transverse-energy triggers are employed to enhance the statistical reach of the high-p T measurements. The results are compared with leading and next-toleading order QCD and with an empirical scaling of measurements at different collision energies using the scaling variable x T 2p T / s over the p T range up to 200 GeV/c. Using a combination of x T scaling and direct interpolation at fixed p T , a reference transverse momentum spectrum at s = 2.76 TeV is constructed, which can be used for studying high-p T particle suppression in the dense QCD medium produced in heavy-ion collisions at that centre-of-mass energy.
SDGs
Type
journal article