Search for pair production of vectorlike quarks in the fully hadronic final state

Sirunyan, A M; Tumasyan, A; Adam, W; Ambrogi, F; Adžić, Petar; others, and

doi:10.1103/PHYSREVD.100.072001

Title: Search for pair production of vectorlike quarks in the fully hadronic final state

Journal Article · Mon Jul 01 00:00:00 EDT 2019 · Physical Review D

DOI:https://doi.org/10.1103/PHYSREVD.100.072001· OSTI ID:22946936

Sirunyan, A M; Tumasyan, A; Adam, W; Ambrogi, F; Adžić, Petar; others, and

The results of two searches for pair production of vectorlike T or B quarks in fully hadronic final states are presented, using data from the CMS experiment at a center-of-mass energy of 13 TeV. The data were collected at the LHC during 2016 and correspond to an integrated luminosity of 35.9 fb-1. A cut-based analysis specifically targets the bW decay mode of the T quark and allows for the reconstruction of the T quark candidates. In a second analysis, a multiclassification algorithm, the 'boosted event shape tagger,' is deployed to label candidate jets as originating from top quarks, and W, Z, and H. Candidate events are categorized according to the multiplicities of identified jets, and the scalar sum of all observed jet momenta is used to discriminate signal events from the quantum chromodynamics multijet background. Both analyses probe all possible branching fraction combinations of the T and B quarks and set limits at 95% confidence level on their masses, ranging from 740 to 1370 GeV. These results represent a significant improvement relative to existing searches in the fully hadronic final state. © 2019 CERN.

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OSTI ID:: 22946936

Journal Information:: Physical Review D, Vol. 100, Issue 7; Other Information: OAI: vinar.vin.bg.ac.rs:123456789/8637; Country of input: Serbia; ISSN 2470-0010

Country of Publication:: United States

Language:: English

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Identification of heavy, energetic, hadronically decaying particles using machine-learning techniques Collaboration, Cms; Sirunyan, Albert M.; Tumasyan, Armen R. ETH Zurich https://doi.org/10.3929/ethz-b-000429003	text	January 2020

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