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

The LHCb Collaboration

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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 < 15 GeV/c and 2.0 < y < 4.5, and is compared to theoretical models. No significant polarisation is observed.
Original languageEnglish
Article number2872
Number of pages12
JournalEuropean Physical Journal C
Issue number5
Publication statusPublished - 2014
Externally publishedYes

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