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Measurement of the cross-section ratio [sigma] ([chi]c2)/[sigma]([chi]c1) for prompt χc production at √s=7 TeV

The prompt production of the charmonium χc1 and χc2 mesons has been studied in proton-proton collisions at the Large Hadron Collider at a centre-of-mass energy of s=7 TeV. The χc mesons are identified through their decays χc→J/ψγ with J/ψ→μ+μ− using 36 pb−1 of data collected by the LHCb detector in...

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Main Authors: Aaij, Roel (Author) , Bachmann, Sebastian (Author) , Bien, Alexander (Author) , Deissenroth, Marc (Author) , Dordei, Francesca (Author) , Eisele, Franz (Author) , Färber, Christian (Author) , Hansmann-Menzemer, Stephanie (Author) , Holubyev, Kostya (Author) , Jäger, Andreas (Author) , Kreplin, Katharina (Author) , Krocker, Georg Alexander (Author) , Langenbruch, Christoph (Author) , Linn, Christian (Author) , Marks, Jörg (Author) , Meißner, Marco (Author) , Seyfert, Paul (Author) , Stahl, Sascha (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: 3 July 2012
In: Physics letters
Year: 2012, Volume: 714, Issue: 2, Pages: 215-223
ISSN:1873-2445
DOI:10.1016/j.physletb.2012.06.077
Online Access:Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1016/j.physletb.2012.06.077
Verlag, kostenfrei, Volltext: http://www.sciencedirect.com/science/article/pii/S037026931200737X
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Author Notes:R. Aaij, S. Bachmann, A. Bien, M. Deissenroth, F. Dordei, F. Eisele, C. Färber, S. Hansmann-Menzemer, K. Holubyev, A. Jaeger, K. Kreplin, G. Krocker, C. Langenbruch, C. Linn, J. Marks, M. Meissner, P. Seyfert, S. Stahl, J. van Tilburg, U. Uwer, S. Wandernoth, D. Wiedner, A. Zhelezov [und weitere] ; the LHCb collaboration
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Summary:The prompt production of the charmonium χc1 and χc2 mesons has been studied in proton-proton collisions at the Large Hadron Collider at a centre-of-mass energy of s=7 TeV. The χc mesons are identified through their decays χc→J/ψγ with J/ψ→μ+μ− using 36 pb−1 of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for the two χc spin states, σ(χc2)/σ(χc1), has been determined as a function of the J/ψ transverse momentum, pTJ/ψ, in the range from 2 to 15 GeV/c. The results are in agreement with the next-to-leading order non-relativistic QCD model at high pTJ/ψ and lie consistently above the pure leading-order colour-singlet prediction.
Item Description:Im Titel sind "sigma" und "chi" als griechische Buchstaben dargestellt
Gesehen am 13.07.2018
Physical Description:Online Resource
ISSN:1873-2445
DOI:10.1016/j.physletb.2012.06.077

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