Pion, kaon, and proton production in central Pb-pb collisions at √sNN=2.76 TeV
In this Letter we report the first results on π±, K±, p, and ¯p production at midrapidity (|y|<0.5) in central Pb-Pb collisions at √sNN=2.76 TeV, measured by the ALICE experiment at the LHC. The pT distributions and yields are compared to previous results at √sNN=200 GeV and expectations from hyd...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
18 December 2012
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| In: |
Physical review letters
Year: 2012, Jahrgang: 109, Heft: 25 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.109.252301 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevLett.109.252301 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.109.252301 
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| Verfasserangaben: | B. Abelev et al.* (ALICE Collaboration) |
MARC
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| 245 | 1 | 0 | |a Pion, kaon, and proton production in central Pb-pb collisions at √sNN=2.76 TeV |c B. Abelev et al.* (ALICE Collaboration) |
| 246 | 3 | 0 | |a sqrt (s_NN) |
| 246 | 3 | 3 | |a Pion, kaon, and proton production in central Pb-pb collisions at square root s NN = 2.76 TeV |
| 264 | 1 | |c 18 December 2012 | |
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| 500 | |a Im Titel steht der Ausdruck "sNN" unter dem Wurzelsymbol, "NN" ist dabei tiefgestellt | ||
| 500 | |a B. Abelev, O. Busch, H. Engel, P. Glässel, R. Grajcarek, N. Herrmann, T. Krawutschke, M.J. Kweon, C. Lara, D. Lohner, J. Mercado Pérez, K. Oyama, Y. Pachmayer, K. Reygers, R. Schicker, K. Schweda, J. Stachel, J. Ulrich, S. Vallero, J. Wiechula, B. Windelband, P. Zelnicek, A. Zimmermann [und weitere] | ||
| 500 | |a Gesehen am 30.11.2018 | ||
| 520 | |a In this Letter we report the first results on π±, K±, p, and ¯p production at midrapidity (|y|<0.5) in central Pb-Pb collisions at √sNN=2.76 TeV, measured by the ALICE experiment at the LHC. The pT distributions and yields are compared to previous results at √sNN=200 GeV and expectations from hydrodynamic and thermal models. The spectral shapes indicate a strong increase of the radial flow velocity with √sNN, which in hydrodynamic models is expected as a consequence of the increasing particle density. While the K/π ratio is in line with predictions from the thermal model, the p/π ratio is found to be lower by a factor of about 1.5. This deviation from thermal model expectations is still to be understood. | ||
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