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dc.contributor.authorAaltonen, T.-
dc.contributor.authorÁlvarez González, B.-
dc.contributor.authorCasal, Bruno-
dc.contributor.authorCuevas, Javier-
dc.contributor.authorGómez, G.-
dc.contributor.authorPalencia, Enrique-
dc.contributor.authorRodrigo, Teresa-
dc.contributor.authorRuiz Jimeno, Alberto-
dc.contributor.authorScodellaro, Luca-
dc.contributor.authorVila, Iván-
dc.contributor.authorVilar, Rocío-
dc.contributor.authorCDF Collaboration-
dc.date.accessioned2014-12-19T13:53:29Z-
dc.date.available2014-12-19T13:53:29Z-
dc.date.issued2012-
dc.identifierdoi: 10.1103/PhysRevLett.108.151802-
dc.identifierissn: 0031-9007-
dc.identifiere-issn: 1079-7114-
dc.identifier.citationPhysical Review Letters 108: 151802 (2012)-
dc.identifier.urihttp://hdl.handle.net/10261/108946-
dc.description.abstractThe angular distributions of muons from Υ(1S,2S,3S) →μ +μ - decays are measured using data from pp̄ collisions at √s=1.96TeV corresponding to an integrated luminosity of 6.7fb -1 and collected with the CDF II detector at the Fermilab Tevatron. This analysis is the first to report the full angular distributions as functions of transverse momentum p T for Υ mesons in both the Collins-Soper and s-channel helicity frames. This is also the first measurement of the spin alignment of Υ(3S) mesons. Within the kinematic range of Υ rapidity |y|<0.6 and p T up to 40GeV/c, the angular distributions are found to be nearly isotropic. © 2012 American Physical Society.-
dc.description.sponsorshipThis work was supported by the U.S. Department of Energy and National Science Foundation; the Italian Istituto Nazionale di Fisica Nucleare; the Ministry of Education, Culture, Sports, Science and Technology of Japan; the Natural Sciences and Engineering Research Council of Canada; the National Science Council of the Republic of China; the Swiss National Science Foundation; the A. P. Sloan Foundation; the Bundesministerium fÜr Bildung und Forschung, Germany; the Korean World Class University Program, the National Research Foundation of Korea; the Science and Technology Facilities Council and the Royal Society, United Kingdom; the Russian Foundation for Basic Research; the Ministerio de Ciencia e Innovación, and Programa Consolider-Ingenio 2010, Spain; the Slovak R&D Agency; the Academy of Finland; and the Australian Research Council (ARC).-
dc.publisherAmerican Physical Society-
dc.relation.isversionofPublisher's version-
dc.rightsopenAccess-
dc.titleMeasurements of the angular distributions of muons from Y decays in pp̄ collisions at √s = 1.96 TeV-
dc.typeartículo-
dc.identifier.doi10.1103/PhysRevLett.108.151802-
dc.relation.publisherversionhttp://dx.doi.org/10.1103/PhysRevLett.108.151802-
dc.date.updated2014-12-19T13:53:29Z-
dc.description.versionPeer Reviewed-
dc.language.rfc3066eng-
Appears in Collections:(IFCA) Artículos
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