Estamos realizando la búsqueda. Por favor, espere...
1551
37
171
26547
4223
2557
339
Abstract: A search is performed for the production of heavy resonances decaying into top-antitop quark pairs in proton-proton collisions at s=8 TeV. Data used for the analyses were collected with the CMS detector and correspond to an integrated luminosity of 19.7 fb-1. The search is performed using events with three different final states, defined by the number of leptons (electrons and muons) from the tt¯?WbWb decay. The analyses are optimized for reconstruction of top quarks with high Lorentz boosts, where jet substructure techniques are used to enhance the sensitivity. Results are presented for all channels and a combination is performed. No significant excess of events relative to the expected yield from standard model processes is observed. Upper limits on the production cross section of heavy resonances decaying to tt¯ are calculated. A narrow leptophobic topcolor Z? resonance with a mass below 2.4 TeV is excluded at 95% confidence level. Limits are also derived for a broad Z? resonance with a 10% width relative to the resonance mass, and a Kaluza-Klein excitation of the gluon in the Randall-Sundrum model. These are the most stringent limits to date on heavy resonances decaying into top-antitop quark pairs.
Fuente: Phys. Rev. D, Vol. 93, Num. 1, Pag. 012001 (2016)
Editorial: American Physical Society
Fecha de publicación: 01/01/2016
Nº de páginas: 35
Tipo de publicación: Artículo de Revista
DOI: 10.1103/PhysRevD.93.012001
ISSN: 1550-7998,1550-2368,2470-0010,2470-0029
Url de la publicación: https://doi.org/10.1103/PhysRevD.93.012001
Leer publicación
KHACHATRYAN, VLADIMIR
JAVIER ANDRES BROCHERO CIFUENTES
JOSE IBAN CABRILLO BARTOLOME
ALICIA CALDERON TAZON
JUAN RAMON CASTIÑEIRAS DE SAA
JORGE DUARTE CAMPDERROS
MARCOS FERNANDEZ GARCIA
GERVASIO GOMEZ GRAMUGLIO
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
Volver