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Measurement of psi (2S) polarisation in pp collisions at root s=7 TeV

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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-ofmass 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.

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Società Italiana di Fisica & Springer Verlag

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European Physical Journal C, 2014, vol. 74, num. 5, p. 2872

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cc-by (c) Camboni, Alessandro et al., 2014

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Articles publicats en revistes (Física Quàntica i Astrofísica)

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Large Hadron Collider (France and Switzerland)

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Measurement of psi (2S) polarisation in pp collisions at root s=7 TeV