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Strange particle production in proton–proton collisions at √s=0.9 TeV with ALICE at the LHC

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The production of mesons containing strange quarks (K0S, φ) and both singly and doubly strange baryons (Λ, Λ¯¯¯¯, and Ξ−+Ξ¯¯¯¯+) are measured at mid-rapidity in pp collisions at s√ = 0.9 TeV with the ALICE experiment at the LHC. The results are obtained from the analysis of about 250 k minimum bias...

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Main Authors: Aamodt, Kenneth (Author) , Angelov, Venelin (Author) , Busch, Oliver (Author) , Glässel, Peter (Author) , Grajcarek, Robert (Author) , Herrmann, Norbert (Author) , Klein, Jochen (Author) , Lohner, Daniel (Author) , Lu, Xianguo (Author) , Mercado Pérez, Jorge (Author) , Oyama, Ken (Author) , Pachmayer, Yvonne C. (Author) , Reygers, Klaus (Author) , Schicker, Rainer (Author) , Schweda, Kai (Author) , Stachel, Johanna (Author) , Vallero, Sara (Author) , Windelband, Bernd (Author)
Corporate Author: ALICE (Author)
Format: Article (Journal)
Language:English
Published: 30 March 2011
In: The European physical journal. C, Particles and fields
Year: 2011, Volume: 71, Issue: 3, Pages: 1-24
ISSN:1434-6052
DOI:10.1140/epjc/s10052-011-1594-5
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjc/s10052-011-1594-5
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Author Notes:The ALICE Collaboration*
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Summary:The production of mesons containing strange quarks (K0S, φ) and both singly and doubly strange baryons (Λ, Λ¯¯¯¯, and Ξ−+Ξ¯¯¯¯+) are measured at mid-rapidity in pp collisions at s√ = 0.9 TeV with the ALICE experiment at the LHC. The results are obtained from the analysis of about 250 k minimum bias events recorded in 2009. Measurements of yields (dN/dy) and transverse momentum spectra at mid-rapidity for inelastic pp collisions are presented. For mesons, we report yields (〈dN/dy〉) of 0.184±0.002(stat.)±0.006(syst.) for K0S and 0.021±0.004(stat.)±0.003(syst.) for φ. For baryons, we find 〈dN/dy〉=0.048±0.001(stat.)±0.004(syst.) for Λ, 0.047±0.002(stat.)±0.005(syst.) for Λ¯¯¯¯ and 0.0101±0.0020(stat.)±0.0009(syst.) for Ξ−+Ξ¯¯¯¯+. The results are also compared with predictions for identified particle spectra from QCD-inspired models and provide a baseline for comparisons with both future pp measurements at higher energies and heavy-ion collisions.
Item Description:*The ALICE Collaboration: K. Aamodt, V. Anguelov, O. Busch, P. Glässel, R. Grajcarek, N. Herrmann, J. Klein, D. Lohner, X.G. Lu, J. Mercado Perez, K. Oyama, Y. Pachmayer, K. Reygers, R. Schicker, J. Stachel, S. Vallero, B. Windelband [und sehr viele weitere Personen]
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Physical Description:Online Resource
ISSN:1434-6052
DOI:10.1140/epjc/s10052-011-1594-5

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