ϒ(nS) polarizations versus particle multiplicity in pp collisions at √{ s} = 7 TeV
The polarizations of the ϒ (1 S) , ϒ (2 S) , and ϒ (3 S) mesons are measured as a function of the charged particle multiplicity in proton-proton collisions at √{ s} = 7 TeV. The measurements are performed with a dimuon data sample collected in 2011 by the CMS experiment, corresponding to an integrated luminosity of 4.9 fb-1. The results are
Khachatryan, V. et al.
Fecha de publicación:
10
2016