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Abstract: Spin correlations and polarization in the top quark–antiquark system are measured using dilepton final states produced in pp collisions at the LHC at vs = 7 TeV. The data correspond to an integrated luminosity of 5.0 fb-1 collected with the CMS detector. The measurements are performed using events with two oppositely charged leptons (electrons or muons), a significant imbalance in transverse momentum, and two or more jets, where at least one of the jets is identified as originating from a b quark. The spin correlations and polarization are measured through asymmetries in angular distributions of the two selected leptons, unfolded to the parton level. All measurements are found to be in agreement with predictions of the standard model.
Fuente: Phys. Rev. Lett. Vol. 112, Num. 18, Pag. 182001 (2014)
Editorial: American Physical Society
Fecha de publicación: 01/05/2014
Nº de páginas: 16
Tipo de publicación: Artículo de Revista
DOI: 10.1103/PhysRevLett.112.182001
ISSN: 0031-9007,1079-7114
Proyecto español: FPA2014-55295-C3-1-R
Url de la publicación: https://doi.org/10.1103/PhysRevLett.112.182001
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CHATRCHYAN, SERGUEI
JAVIER ANDRES BROCHERO CIFUENTES
JOSE IBAN CABRILLO BARTOLOME
ALICIA CALDERON TAZON
SHANHUEI CHUANG
JORGE DUARTE CAMPDERROS
MARCOS FERNANDEZ GARCIA
GERVASIO GOMEZ GRAMUGLIO
FRANCISCO JAVIER GONZALEZ SANCHEZ
ALBERTO GRAZIANO
MARIA AMPARO LOPEZ VIRTO
JESUS MARCO DE LUCAS
RAFAEL JOSE MARCO DE LUCAS
CELSO MARTINEZ RIVERO
FRANCISCO MATORRAS WEINIG
FRANCISCA JAVIELA MUÑOZ SANCHEZ
JONATAN PIEDRA GOMEZ
MARIA TERESA RODRIGO ANORO
ANA YAIZA RODRIGUEZ MARRERO
ALBERTO RUIZ JIMENO
LUCA SCODELLARO
IVAN VILA ALVAREZ
ROCIO VILAR CORTABITARTE
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