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 ; rapidity y in the kinematic region 3.5 < pT < 15 GeV/c ; 2.0 < y < 4.5, ; is compared to theoretical models. No significant polarisation is observed. © 2014 CERN for the benefit of the LHCb collaboration.
Measurement of ψ(2S) polarisation in pp collisions at √s = 7 TeV
PALANO, Antimo;PAPPAGALLO, MARCO IGNAZIO;
2014-01-01
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 ; rapidity y in the kinematic region 3.5 < pT < 15 GeV/c ; 2.0 < y < 4.5, ; is compared to theoretical models. No significant polarisation is observed. © 2014 CERN for the benefit of the LHCb collaboration.File in questo prodotto:
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