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Centrality dependence of charged particle production at large transverse momentum in Pb-Pb collisions at √sNN=2.76 TeV$h

The inclusive transverse momentum (pT) distributions of primary charged particles are measured in the pseudo-rapidity range |η|<0.8 as a function of event centrality in Pb-Pb collisions at sNN=2.76 TeV with ALICE at the LHC. The data are presented in the pT range 0.15<pT<50 GeV/c for nine c...

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Main Authors: Abelev, Betty (Author) , Angelov, Venelin (Author) , Busch, Oliver (Author) , Glässel, Peter (Author) , Grajcarek, Robert (Author) , Herrmann, Norbert (Author) , Klein, Jochen (Author) , Koch, Kathrin (Author) , Krawutschke, Tobias (Author) , Kweon, MinJung (Author) , Lohner, Daniel (Author) , Lu, Xianguo (Author) , Maire, Antonin (Author) , Mercado Pérez, Jorge (Author) , Oyama, Ken (Author) , Pachmayer, Yvonne C. (Author) , Reygers, Klaus (Author) , Schicker, Rainer (Author) , Stachel, Johanna (Author) , Stiller, Johannes Hendrik (Author) , Ulrich, Joachim (Author) , Vallero, Sara (Author) , Wang, Yifei (Author) , Windelband, Bernd (Author) , Zimmermann, Alice (Author)
Corporate Author: ALICE (Author)
Other Authors: Constantin, Paul (Other) , Schweda, Kai (Other)
Format: Article (Journal)
Language:English
Published: 31 January 2013
In: Physics letters
Year: 2013, Volume: 720, Issue: 1/3, Pages: 52-62
ISSN:1873-2445
DOI:10.1016/j.physletb.2013.01.051
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.physletb.2013.01.051
Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0370269313000920
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Summary:The inclusive transverse momentum (pT) distributions of primary charged particles are measured in the pseudo-rapidity range |η|<0.8 as a function of event centrality in Pb-Pb collisions at sNN=2.76 TeV with ALICE at the LHC. The data are presented in the pT range 0.15<pT<50 GeV/c for nine centrality intervals from 70-80% to 0-5%. The results in Pb-Pb are presented in terms of the nuclear modification factor RAA using a pp reference spectrum measured at the same collision energy. We observe that the suppression of high-pT particles strongly depends on event centrality. The yield is most suppressed in central collisions (0-5%) with RAA≈0.13 at pT=6-7 GeV/c. Above pT=7 GeV/c, there is a significant rise in the nuclear modification factor, which reaches RAA≈0.4 for pT>30 GeV/c. In peripheral collisions (70-80%), only moderate suppression (RAA=0.6-0.7) and a weak pT dependence is observed. The measured nuclear modification factors are compared to other measurements and model calculations.
Item Description:The ALICE collaboration: B. Abelev, V. Angelov, O. Busch, P. Constantin, P. Glässel, R. Grajcarek, N. Herrmann, J. Klein, K. Koch, T. Krawutschke, M.J. Kweon, D. Lohner, X.-G. Lu, A. Maire, J. Mercado-Pérez, K. Oyama, Y. Pachmayer, K. Reygers, R. Schicker, K. Schweda, J. Stachel, J.H. Stiller, J. Ulrich, S. Vallero, Y. Wang, B. Windelband, A. Zimmermann und weitere 958
Gesehen am 30.04.2021
Physical Description:Online Resource
ISSN:1873-2445
DOI:10.1016/j.physletb.2013.01.051

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