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Production of K[ast](892)0 and [phi](1020) in pp collisions at √s=7 TeV

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The production of K∗(892)0 and ϕ(1020) in pp collisions at s√=7 TeVs=7 TeV\sqrt{s}=7~\mathrm{TeV} was measured by the ALICE experiment at the LHC. The yields and the transverse momentum spectra d2 N/dydp T at midrapidity |y|<0.5 in the range 0<p T<6 GeV/c for K∗(892)0 and 0.4<p T<6 Ge...

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Main Authors: Abelev, Betty (Author) , Angelov, Venelin (Author) , Busch, Oliver (Author) , Glässel, Peter (Author) , Grajcarek, Robert (Author) , Herrmann, Norbert (Author) , Krawutschke, Tobias (Author) , Kweon, MinJung (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) , Stiller, Johannes Hendrik (Author) , Vallero, Sara (Author) , Wang, Yifei (Author) , Wiechula, Jens (Author) , Zelnicek, Pierre (Author) , Zimmermann, Alice (Author)
Corporate Author: ALICE (Author)
Format: Article (Journal)
Language:English
Published: 30 October 2012
In: The European physical journal. C, Particles and fields
Year: 2012, Volume: 72, Issue: 10
ISSN:1434-6052
DOI:10.1140/epjc/s10052-012-2183-y
Online Access:Verlag, Volltext: http://dx.doi.org/10.1140/epjc/s10052-012-2183-y
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Author Notes:the ALICE Collaboration*
Description
Summary:The production of K∗(892)0 and ϕ(1020) in pp collisions at s√=7 TeVs=7 TeV\sqrt{s}=7~\mathrm{TeV} was measured by the ALICE experiment at the LHC. The yields and the transverse momentum spectra d2 N/dydp T at midrapidity |y|<0.5 in the range 0<p T<6 GeV/c for K∗(892)0 and 0.4<p T<6 GeV/c for ϕ(1020) are reported and compared to model predictions. Using the yield of pions, kaons, and Ω baryons measured previously by ALICE at s√=7 TeVs=7 TeV\sqrt{s}=7\ \mathrm{TeV}, the ratios K∗/K−, ϕ/K∗, ϕ/K−, ϕ/π −, and (Ω+Ω¯¯¯¯)/ϕ(Ω+Ω¯)/ϕ(\Omega + \overline{\Omega })/\phi are presented. The values of the K∗/K−, ϕ/K∗ and ϕ/K− ratios are similar to those found at lower centre-of-mass energies. In contrast, the ϕ/π − ratio, which has been observed to increase with energy, seems to saturate above 200 GeV. The (Ω+Ω¯¯¯¯)/ϕ(Ω+Ω¯)/ϕ(\Omega + \overline {\Omega })/\phi ratio in the p T range 1-5 GeV/c is found to be in good agreement with the prediction of the HIJING/BB¯¯¯¯HIJING/BB¯\mathrm{HIJING}/\mathrm{B}\overline{\mathrm{B}} v2.0 model with a strong colour field.
Item Description:Im Titel werden "ast" und "phi" als griechische Buchstaben dargestellt
Im Titel sind "*" und "0" hochgestellt
The ALICE Collaboration: B. Abelev, V. Anguelov, O. Busch, P. Glässel, R.Grajcarek, N. Herrmann, T. Krawutschke, M.J. Kweon, D. Lohner, X.-G. Lu, J. Mercado Pérez, K. Oyama, Y. Pachmayer, K. Reygers, R. Schicker, K. Schweda, J. Stachel, J.H. Stiller, S. Vallero, Y. Wang, J. Wiechula, P. Zelnicek, A. Zimmermann [und weitere]
Gesehen am 12.11.2018
Physical Description:Online Resource
ISSN:1434-6052
DOI:10.1140/epjc/s10052-012-2183-y

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