Measurement of the υ(1S), υ(2S), and υ(3S) polarizations in pp collisions at √s=7 TeV
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
27/05/2014
27/05/2014
20/02/2013
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Resumo |
The polarizations of the υ(1S), υ(2S), and υ(3S) mesons are measured in proton-proton collisions at √s=7 TeV, using a data sample of υ(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 λ™, λφ, and λ, as well as the frame-invariant quantity λ, are presented as a function of the υ(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 is seen in the explored kinematic region. © 2013 CERN. |
Identificador |
http://dx.doi.org/10.1103/PhysRevLett.110.081802 Physical Review Letters, v. 110, n. 8, 2013. 0031-9007 1079-7114 http://hdl.handle.net/11449/74615 10.1103/PhysRevLett.110.081802 WOS:000315141600005 2-s2.0-84874159070 2-s2.0-84874159070.pdf |
Idioma(s) |
eng |
Relação |
Physical Review Letters |
Direitos |
closedAccess |
Palavras-Chave | #Data sample #Integrated luminosity #Longitudinal polarization #Polarization parameters #Proton proton collisions #Transverse momenta #Angular distribution #Tellurium compounds #Polarization |
Tipo |
info:eu-repo/semantics/article |