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J/[psi] polarization in collisions at √s=7  TeV

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The ALICE Collaboration has studied J/ψ production in pp collisions at √s=7 TeV at the LHC through its muon pair decay. The polar and azimuthal angle distributions of the decay muons were measured, and results on the J/ψ polarization parameters λθ and λϕ were obtained. The study was performed in the...

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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) , Radomski, Sylwester (Author) , Reygers, Klaus (Author) , Schicker, Rainer (Author) , Schweda, Kai (Author) , Stachel, Johanna (Author) , Ulrich, Joachim (Author) , Vallero, Sara (Author) , Wang, Yifei (Author) , Wiechula, Jens (Author) , Zimmermann, Alice (Author)
Corporate Author: ALICE (Author)
Format: Article (Journal)
Language:English
Published: 23 February 2012
In: Physical review letters
Year: 2012, Volume: 108, Issue: 8
ISSN:1079-7114
DOI:10.1103/PhysRevLett.108.082001
Online Access:Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevLett.108.082001
Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.108.082001
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Author Notes:B. Abelev et al.* (ALICE Collaboration)
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Summary:The ALICE Collaboration has studied J/ψ production in pp collisions at √s=7 TeV at the LHC through its muon pair decay. The polar and azimuthal angle distributions of the decay muons were measured, and results on the J/ψ polarization parameters λθ and λϕ were obtained. The study was performed in the kinematic region 2.5<y<4, 2<pt<8 GeV/c, in the helicity and Collins-Soper reference frames. In both frames, the polarization parameters are compatible with zero, within uncertainties.
Item Description: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, S. Radomski, K. Reygers, R. Schicker, K. Schweda, J. Stachel, J. Ulrich, S. Vallero, Y. Wang, J. Wiechula, A. Zimmermann [und weitere] (ALICE Collaboration)
Im Titel wird "psi" als griechischer Buchstabe dargestellt
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Physical Description:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.108.082001

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