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Measurement of psi (2S) polarisation in pp collisions at root s=7 TeV
- Published in: The European Physical Journal C, vol. 74, num. 5, p. 2872
- New York: Springer, 2014
The polarisation of prompt mesons is measured by performing an angular analysis of decays using proton-proton collision data, corresponding to an integrated luminosity of 1.0, collected by the LHCb detector at a centre-of-mass energy of 7 TeV. The polarisation is measured in bins of transverse momentum and rapidity in the kinematic region and , and is compared to theoretical models. No significant polarisation is observed.