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Energy dependence of the transverse momentum distributions of charged particles in pp collisions measured by ALICE

Alme, Johan; Erdal, Hege Austrheim; Helstrup, Håvard; Hetland, Kristin Fanebust; Kileng, Bjarte; Altinpinar, Sedat; Djuvsland, Øystein; Fehlker, Dominik; Haaland, Øystein Senneset; Huang, Meidana; Langøy, Rune; Lien, Jørgen; Lønne, Per-Ivar; Nystrand, Joakim; Rehman, Attiq ur; Røed, Ketil; Røhrich, Dieter; Skjerdal, Kyrre; Ullaland, Kjetil; Wagner, Boris; Yang, Shiming; Bätzing, Paul Christoph; Dordic, Olja; Eyyubova, Gyulnara; Lindal, Svein; Løvhøiden, Gunnar; Milosevic, Jovan; Nilsson, Mads Stormo; Qvigstad, Henrik; Richter, Matthias; Skaali, Toralf Bernhard; Tveter, Trine Spedstad; Wikne, Jon Christopher; Abelev, Betty; Adam, Jaroslav; Adamová, Dagmar; Adare, Andrew Marshall; Aggarwal, Madan M.; Aglieri Rinella, Gianluca; Agocs, Andreas Gabor; Agostinelli, Andrea; Ahammed, Zubayer; Ahmad, Nazeer; Ahmad Masoodi, Arshar; Ahn, Sang Un; Ajaz, Muhammad; Akindinov, Alexander; Aleksandrov, Dimitry; Alessandro, Bruno; Alici, Andrea; ALICE Collaboration
Journal article, Peer reviewed
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http://hdl.handle.net/11250/2471089
Issue date
2013
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Original version
European Physical Journal C (2013) 73:2662 (12)   10.1140/epjc/s10052-013-2662-9
Abstract
Differential cross sections of charged particles in inelastic pp collisions as a function of pT have been measured at √s = 0.9, 2.76 and 7 TeV at the LHC. The pT spectra are compared to NLO-pQCD calculations. Though the differential cross section for an individual √s cannot be described by NLO-pQCD, the relative increase of cross section with √s is in agreement with NLO-pQCD. Based on these measurements and observations, procedures are discussed to construct pp reference spectra at √s = 2.76 and 5.02 TeV up to pT = 50 GeV/c as required for the calculation of the nuclear modification factor in nucleus–nucleus and proton–nucleus collisions.
Journal
European Physical Journal C
Copyright
© CERN for the benefit of the ALICE collaboration 2013. This article is published with open access at Springerlink.com

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