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Charged particle transverse momentum spectra in pp collisions at (raiz de)s = 0.9 7 TeV

AutorCMS Collaboration
Palabras claveHadron-Hadron Scattering
Fecha de publicación2011
EditorSpringer
CitaciónJournal of High Energy Physics (8): 086 (2011)
ResumenThe charged particle transverse momentum (pT) spectra are presented for pp collisions at ps = 0:9 and 7TeV. 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-pT measurements. The results are compared with leading and next-toleading order QCD and with an empirical scaling of measurements at di erent 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 xed pT, a reference transverse momentum spectrum at ps = 2:76TeV 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.
Descripción39 páginas, 7 figuras, 2 tablas.-- Open Access: This article is distributed under the terms of the Creative Commons Attribution Noncommercial License.
Versión del editorhttp://dx.doi.org/10.1007/JHEP08(2011)086
URIhttp://hdl.handle.net/10261/45865
DOI10.1007/JHEP08(2011)086
ISSN1029-8479
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