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Measurement of [psi](2S) meson production in pp collisions at √s = 7 TeV

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The differential cross-section for the inclusive production of ψ(2S) mesons in pp collisions at $\sqrt{s}=7\ \mbox{TeV}$has been measured with the LHCb detector. The data sample corresponds to an integrated luminosity of 36 pb−1. The ψ(2S) mesons are reconstructed in the decay channels ψ(2S)→μ+μ− an...

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Main Authors: Aaij, Roel (Author) , Bachmann, Sebastian (Author) , Bien, Alexander (Author) , Dordei, Francesca (Author) , Eisele, Franz (Author) , Färber, Christian (Author) , Hansmann-Menzemer, Stephanie (Author) , Jäger, Andreas (Author) , Kreplin, Katharina (Author) , Krocker, Georg Alexander (Author) , Linn, Christian (Author) , Marks, Jörg (Author) , Meißner, Marco (Author) , Seyfert, Paul (Author) , Tilburg, Jeroen van (Author) , Uwer, Ulrich (Author) , Wandernoth, Sebastian (Author) , Wiedner, Dirk (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 10 August 2012
In: The European physical journal. C, Particles and fields
Year: 2012, Volume: 72, Issue: 8
ISSN:1434-6052
DOI:10.1140/epjc/s10052-012-2100-4
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjc/s10052-012-2100-4
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Author Notes:The LHCb Collaboration*
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Summary:The differential cross-section for the inclusive production of ψ(2S) mesons in pp collisions at $\sqrt{s}=7\ \mbox{TeV}$has been measured with the LHCb detector. The data sample corresponds to an integrated luminosity of 36 pb−1. The ψ(2S) mesons are reconstructed in the decay channels ψ(2S)→μ+μ− and ψ(2S)→J/ψπ+π−, with the J/ψ meson decaying into two muons. Results are presented both for promptly produced ψ(2S) mesons and for those originating from b-hadron decays. In the kinematic range pT(ψ(2S))≤16 GeV/c and 2<y(ψ(2S))≤4.5 we measure where the last uncertainty on the prompt cross-section is due to the unknown ψ(2S) polarization. Recent QCD calculations are found to be in good agreement with our measurements. Combining the present result with the LHCb J/ψ measurements we determine the inclusive branching fraction where the last uncertainty is due to the $\mathcal{B}(b \rightarrow J/\psi X)$, $\mathcal{B}(J/\psi\rightarrow\mu^{+} \mu^{-})$and $\mathcal{B}(\psi(2S) \rightarrow e^{+} e^{-})$branching fraction uncertainties.
Item Description:The LHCb Collaboration: R. Aaij, S. Bachmann, A. Bien, F. Dordei, F. Eisele, C. Färber, S. Hansmann-Menzemer, A. Jaeger, K. Kreplin, G. Krocker, C. Linn, J. Marks, M. Meissner, P. Seyfert, J. van Tilburg, U. Uwer, S. Wandernoth, D. Wiedner, A. Zhelezov und zahlreiche weitere
Im Titel wird "psi" als griechischer Buchstabe dargestellt
Das s im Titel steht unter dem Wurzelzeichen
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Physical Description:Online Resource
ISSN:1434-6052
DOI:10.1140/epjc/s10052-012-2100-4

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