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research article
Measurement of psi (2S) polarisation in pp collisions at root s=7 TeV
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.
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10-1140_epjc_s10052-014-2872-9.pdf
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578.64 KB
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