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Abstract: A search is presented for a heavy spin-1 resonance Z? decaying to a top quark and a vector-like top quark partner T in the lepton + jets final state. The search is performed using a data set of pp pp collisions at a centre-of-mass energy of 13TeV corresponding to an integrated luminosity of 35.9fb?1 as recorded by the CMS experiment at the CERN LHC in the year 2016. The analysis is optimised for final states arising from the TT decay modes to a top quark and a Higgs or Z boson (T?Ht,Zt). The event selection makes use of resolved and merged top quark decay products, as well as decays of boosted Higgs bosons and ZZ and WW bosons using jet substructure techniques. No significant deviation from the standard model background expectation is observed. Exclusion limits on the product of the cross section and branching fraction for Z??tT,T?Ht,Zt,Wb are presented for various combinations of the Z? resonance mass and the vector-like TT quark mass. These results represent the most stringent limits to date for the decay mode Z??tT?tHt. In a benchmark model with extra dimensions, invoking a heavy spin-1 resonance G?, masses of the G? between 1.5 and 2.3TeV and between 2.0 and 2.4TeV are excluded for T masses of 1.2 and 1.5TeV, respectively.
Fuente: Eur. Phys. J. C 79, 208 (2019)
Editorial: Springer New York LLC
Fecha de publicación: 01/03/2019
Nº de páginas: 32
Tipo de publicación: Artículo de Revista
DOI: 10.1140/epjc/s10052-019-6688-5
ISSN: 1434-6044,1434-6052
Url de la publicación: https://doi.org/10.1140/epjc/s10052-019-6688-5
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SIRUNYAN, A. M.
JOSE IBAN CABRILLO BARTOLOME
ALICIA CALDERON TAZON
BARBARA CHAZIN QUERO
JORGE DUARTE CAMPDERROS
MARCOS FERNANDEZ GARCIA
PEDRO JOSE FERNANDEZ MANTECA
ANDREA GARCIA ALONSO
JUAN GARCIA FERRERO
GERVASIO GOMEZ GRAMUGLIO
MARIA AMPARO LOPEZ VIRTO
JESUS MARCO DE LUCAS
CELSO MARTINEZ RIVERO
PABLO MARTINEZ RUIZ DEL ARBOL
FRANCISCO MATORRAS WEINIG
JONATAN PIEDRA GOMEZ
CEDRIC GERALD PRIEELS
MARIA TERESA RODRIGO ANORO
ALBERTO RUIZ JIMENO
LUCA SCODELLARO
NICOLO TREVISANI
IVAN VILA ALVAREZ
ROCIO VILAR CORTABITARTE
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