Search for pair production of excited top quarks in the lepton + jets final state

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2018) Search for pair production of excited top quarks in the lepton + jets final state. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 0370-2693. pp. 349-370. ISSN 0370-2693

	PDF - Published Version Restricted to Repository staff only Download (1MB) | Request a copy
	PDF (Scopus) - Supplemental Material Restricted to Repository staff only Download (557kB) | Request a copy

Abstract

A search is performed for the pair production of spin-3/2 excited top quarks, each decaying to a top quark and a gluon. The search uses the data collected with the CMS detector from proton–proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb−1. Events are selected by requiring an isolated muon or electron, an imbalance in the transverse momentum, and at least six jets of which exactly two must be compatible with originating from the fragmentation of a bottom quark. No significant excess over the standard model predictions is found. A lower limit of 1.2 TeV is set at 95% confidence level on the mass of the spin-3/2 excited top quark in an extension of the Randall–Sundrum model, assuming a 100% branching fraction of its decay into a top quark and a gluon. These are the best limits to date in a search for excited top quarks and the first at 13 TeV.

Item Type:	Article (Journal)
Additional Information:	7861/65586
Uncontrolled Keywords:	CMS; Physics; Beyond two generations; Excited top quark
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:	09 Aug 2018 15:58
Last Modified:	09 Aug 2018 15:58
URI:	http://irep.iium.edu.my/id/eprint/65586

Actions (login required)

View Item