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 < 15 GeV/c and 2.0 < y < 4.5, and is compared to theoretical models. No significant polarisation is observed.
Original language | English |
---|---|
Article number | 2872 |
Number of pages | 12 |
Journal | European Physical Journal C |
Volume | 74 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2014 |
Externally published | Yes |