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

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2017) Search for a heavy resonance decaying to a top quark and a vector-like top quark at √s=13 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 775. pp. 315-337. ISSN 0370-2693

	PDF (The CMS Collaboration) - Published Version Restricted to Repository staff only Download (1MB) | Request a copy
	PDF (scopus) - Supplemental Material Restricted to Repository staff only Download (560kB) | Request a copy

Abstract

A search is presented for massive spin-1 Z0 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 Z0 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

Item Type:	Article (Journal)
Additional Information:	7861/63056
Uncontrolled Keywords:	Beyond Standard Model, Hadron-Hadron scattering (experiments), Top physics
Subjects:	Q Science > Q Science (General) Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science Kulliyyah of Science > Department of Physics
Depositing User:	Dr Mohd Adli MD Ali
Date Deposited:	05 Nov 2018 11:07
Last Modified:	05 Nov 2018 11:07
URI:	http://irep.iium.edu.my/id/eprint/63056

Actions (login required)

View Item