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Search for flavor changing neutral currents in top quark decays in pp collisions at 7 TeV

2013-01-29Artigo científico Acesso aberto
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dc.contributor.authorCMS collaboration (2193 authors)
dc.contributor.authorHollar, Jonathan
dc.contributor.authorNayak, Aruna
dc.contributor.authorAlmeida, Nuno
dc.contributor.authorBargassa, Pedrame
dc.contributor.authorDavid Tinoco Mendes, Andre
dc.contributor.authorFaccioli, Pietro
dc.contributor.authorFerreira Parracho, Pedro Guilherme
dc.contributor.authorGallinaro, Michele
dc.contributor.authorSeixas, Joao
dc.contributor.authorVarela, Joao
dc.contributor.authorVischia, Pietro
dc.contributor.authorLloret Iglesias, Lara
dc.contributor.authorMusella, Pasquale
dc.contributor.authorRodrigues Antunes, Joao
dc.contributor.authorSilva, Pedro
dc.contributor.authorPela, Joao
dc.contributor.authorLeonardo, Nuno
dc.date.accessioned2019-02-03T20:42:30Z
dc.date.available2019-02-03T20:42:30Z
dc.date.issued2013-01-29
dc.date.updated2019-02-03T20:42:30Z
dc.description.abstractThe results of a search for flavor changing neutral currents in top quark decays t to Zq in events with a topology compatible with the decay chain t t-bar to Wb + Zq to ell nu b + ell ell q are presented. The search is performed with a data sample corresponding to an integrated luminosity of 5.0 inverse femtobarns of proton-proton collisions at a center-of-mass energy of 7 TeV, collected with the CMS detector at the LHC. The observed number of events agrees with the standard model prediction and no evidence for flavor changing neutral currents in top quark decays is found. A t to Zq branching fraction greater than 0.21% is excluded at the 95% confidence level.
dc.description.versionPeer Reviewed
dc.identifierPhys.Lett. B718 (2013) 1252-1272; DOI 10.1016/j.physletb.2012.12.045
dc.identifier.urihttp://dx.doi.org/10.1016/j.physletb.2012.12.045
dc.identifier.urihttp://hdl.handle.net/10400.26/26240
dc.language.isoeng
dc.titleSearch for flavor changing neutral currents in top quark decays in pp collisions at 7 TeV
dc.typejournal article
dspace.entity.typePublication
rcaap.rightsopenAccesspt
rcaap.typearticle

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LIP - AP - Física de Partículas e Astropartículas