Search for a heavy resonance decaying to a top quark and a vector-like top quark at s√=13 TeV

CMS Collaboration; A. M. Sirunyan; A Tumasyan

doi:10.1007/JHEP09(2017)053

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Search for a heavy resonance decaying to a top quark and a vector-like top quark at s√=13 TeV

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Search for a heavy resonance decaying to a top quark and a vector-like top quark at s√=13 TeV

CMS Collaboration, A. M. Sirunyan and A Tumasyan

Journal of high energy physics : JHEP, Vol.2017, 53

09/13/2017

DOI: 10.1007/JHEP09(2017)053

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Abstract

A search is presented for massive spin-1 Z′ resonances decaying to a top quark and a heavy vector-like top quark partner T. The search is based on a 2.6 fb−1 sample of proton-proton collisions at 13 TeV collected with the CMS detector at the LHC. The analysis is optimized for final states in which the T quark decays to a W boson and a bottom quark. The focus is on all-jet final states in which both the W boson and the top quark decay into quarks that evolve into jets. The decay products of the top quark and of the W boson are assumed to be highly Lorentz-boosted and cannot be reconstructed as separate jets, but are instead reconstructed as merged, wide jets. Techniques for the identification of jet substructure and jet flavour are used to distinguish signal from background events. Several models for Z′ bosons decaying to T quarks are excluded at 95% confidence level, with upper limits on the cross section ranging from 0.13 to 10 pb, depending on the chosen hypotheses. This is the first search for a neutral spin-1 heavy resonance decaying to a top quark and a vector-like T quark in the all-hadronic final state.

Beyond Standard Model

Hadron-Hadron scattering (experiments)

Top physics

Details

Title: Subtitle: Search for a heavy resonance decaying to a top quark and a vector-like top quark at s√=13 TeV
Creators: CMS Collaboration (Institution)
A. M. Sirunyan - A. Alikhanyan National Laboratory
A Tumasyan - A. Alikhanyan National Laboratory
Contributors: B. Bilki (Contributor) - University of Iowa
W Clarida (Contributor) - University of Iowa
Kamuran Dilsiz (Contributor) - University of Iowa, Physics and Astronomy
S. Durgut (Contributor) - University of Iowa
R. P. Gandrajula (Contributor) - University of Iowa
M. Haytmyradov (Contributor) - University of Iowa
V Khristenko (Contributor) - University of Iowa
J-P Merlo (Contributor) - University of Iowa
H Mermerkaya (Contributor) - University of Iowa
Alexi Mestvirishvili (Contributor) - University of Iowa, Physics and Astronomy
A. Moeller (Contributor) - University of Iowa
Jane M Nachtman (Contributor) - University of Iowa, Physics and Astronomy
Hasan Ogul (Contributor) - University of Iowa, Physics and Astronomy
Yasar Onel (Contributor) - University of Iowa, Physics and Astronomy
F. Ozok (Contributor) - University of Iowa
Aldo Penzo (Contributor) - University of Iowa, Physics and Astronomy
C. Snyder (Contributor) - University of Iowa
E. Tiras (Contributor) - University of Iowa
James W Wetzel (Contributor) - University of Iowa, Physics and Astronomy
Kai Yi (Contributor) - University of Iowa, Physics and Astronomy
Resource Type: Journal article
Publication Details: Journal of high energy physics : JHEP, Vol.2017, 53
DOI: 10.1007/JHEP09(2017)053
ISSN: 1126-6708
eISSN: 1029-8479
Publisher: Springer
Language: English
Date published: 09/13/2017
Academic Unit: Physics and Astronomy
Record Identifier: 9984439155102771

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