Transverse Momentum Distribution and Nuclear Modification Factor of Charged Particles in p + Pb Collisions at √SNN = 5.02 TeV.

The polarizations of the Y(1S), Y(2S), and Y(3S) mesons are measured in protonproton collisions at √s = 7 TeV, using a data sample of Y(nS) → μ+μ- decays collected by the CMS experiment, corresponding to an integrated luminosity of 4.9 fb-1. The dimuon decay angular distributions are analyzed in three different polarization frames. The polarization parameters λϑ, λφ and λϑφ, as well as the frame-invariant quantity ̃λ, are presented as a function of the Y(nS) transverse momentum between 10 and 50 GeV, in the rapidity ranges ∣y∣ < 0.6 and 0.6 < ∣y∣ < 1.2. No evidence of large transverse or longitudinal polarizations has been seen in the explored kinematic region. [ABSTRACT FROM AUTHOR]