Search for a heavy resonance decaying to a top quark and a vector-like top quark in the lepton + jets final state in pp collisions at √s = 13 TeV s = 13 TeV
Name
Sirunyan2019_Article_SearchForAHeavyResonanceDecayi.pdf
Description
Published version
Size
1.05 MB
Format
Adobe PDF
Checksum (MD5)
4e41a981590b542bf03d3392165eaa11
Author(s)
The CMS Collaboration
Date Issued
2019
Journal
The European Physical Journal C - Particles and Fields
Publisher
Springer Science and Business Media LLC
Version
Final published version
Abstract
© 2019, CERN for the benefit of the CMS Collaboration. 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 p p 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 T decay modes to a top quark and a Higgs or Z boson (T → H t , Z t). The event selection makes use of resolved and merged top quark decay products, as well as decays of boosted Higgs bosons and Z and W 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 ′ → t T , T → H t , Z t , W b are presented for various combinations of the Z ′ resonance mass and the vector-like T quark mass. These results represent the most stringent limits to date for the decay mode Z ′ → t T → t H t. 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1140/epjc/s10052-019-6688-5
