The polarisation of prompt ψ ( 2 S ) mesons is measured by performing an angular analysis of ψ ( 2 S ) → 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 p T and rapidity y in the kinematic region 3.5 < p T < 15 GeV / c and 2.0 < y < 4.5 , and is compared to theoretical models. No significant polarisation is observed.

Measurement of ψ(2S) polarisation in pp collisions at √s = 7 TeV

ANDREOTTI, Mirco;BALDINI, Wander;BOZZI, Concezio;CALABRESE, Roberto;CORVO, Marco;FIORE, Marco;FIORINI, Massimiliano;LUPPI, Eleonora;MANZALI, Matteo;SAVRIE', Mauro;TELLARINI, Giulia;TOMASSETTI, Luca;
2014

Abstract

The polarisation of prompt ψ ( 2 S ) mesons is measured by performing an angular analysis of ψ ( 2 S ) → 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 p T and rapidity y in the kinematic region 3.5 < p T < 15 GeV / c and 2.0 < y < 4.5 , and is compared to theoretical models. No significant polarisation is observed.
2014
R., Aaij; B., Adeva; M., Adinolfi; A., Affolder; Z., Ajaltouni; J., Albrecht; F., Alessio; M., Alexander; S., Ali; G., Alkhazov; P., Alvarez Cartelle;...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2085812
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