Measurement of ψ(2S) polarisation in pp collisions at √s = 7 TeV

LHCb Collaboration

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Abstract

The polarisation of prompt ψ(2S) mesons is measured by performing an angular analysis of ψ(2S)→μ+μ− decays using proton-proton collision data, corresponding to an integrated luminosity of 1.0 fb −1 , collected by the LHCb detector at a centre-of-mass energy of 7 TeV. The polarisation is measured in bins of transverse momentum pT and rapidity y in the kinematic region 3.5<pT<15GeV/c and 2.0<y<4.5 , and is compared to theoretical models. No significant polarisation is observed.
Original languageEnglish
Article number2872
JournalEuropean Physical Journal C
Volume74
Issue number5
DOIs
Publication statusPublished - 20 May 2014

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