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dc.contributor.authorChatrchyan, S.A.
dc.contributor.authorKhachatryan, Vladimir A.
dc.contributor.authorSirunyan, A.M.
dc.contributor.authorTumasyan, A.R.
dc.contributor.authorBaarmand, Marc M.
dc.contributor.authorDorney, B.
dc.contributor.authorHohlmann, Marcus
dc.contributor.authorKalakhety, Himali
dc.contributor.authorVodopiyanov, Igor
dc.contributor.authorYumiceva, Francisco
dc.date.accessioned2013-12-09T20:57:14Z
dc.date.available2013-12-09T20:57:14Z
dc.date.issued2013-02-20
dc.identifier.citationChatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Aguilo, E., . . . Swanson, J. (2013). Measurement of the Y(1S), Y(2S), and Y(3S) polarizations in pp collisions at √s=7 TeV. Physical Review Letters, 110(8)en_US
dc.identifier.urihttp://hdl.handle.net/11141/191
dc.description.abstractThe polarizations of the Y(1S), Y(2S), and Y(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.en_US
dc.language.isoen_USen_US
dc.rightsThis published article is available in accordance with the publisher's policy. It may be subject to U.S. copyright law.en_US
dc.rights.urihttp://publish.aps.org/authors/transfer-of-copyright-agreementen_US
dc.titleMeasurement of the Y(1S), Y(2S), and Y(3S) polarizations in pp collisions at √s=7 TeVen_US
dc.typeArticleen_US
dc.identifier.doi10.1103/PhysRevLett.110.081802


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