Electroweak top couplings, partial compositeness, and top partner

Brown, S., Englert, C. , Galler, P. and Stylianou, P. (2020) Electroweak top couplings, partial compositeness, and top partner. Physical Review D, 102(7), 075021. (doi: 10.1103/PhysRevD.102.075021)

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Partial top quark compositeness is a crucial aspect of theories with strong electroweak symmetry breaking. Together with the heavy top partners that lift the top quark mass to its observed value, these theories predict correlated modifications of the top quark’s electroweak couplings. Associated measurements therefore provide direct constraints on the ultraviolet structure of the underlying hypercolour dynamics. In this paper we employ a minimal version of top compositeness to discuss how measurements related to the top’s electroweak gauge interactions can inform the potential composite nature of the TeV scale. In doing so, we identify the dominant factors that limit the BSM sensitivity. Extrapolating to a future 100 TeV hadron collider, we demonstrate that top quark measurements performed at highest precision can provide additional information to resonance search by performing a representative resonant top partner search that specifically targets the correlated resonant electroweak top partner signatures.

Item Type:Articles
Additional Information:Funded by SCOAP3.
Glasgow Author(s) Enlighten ID:Galler, Dr Peter and Brown, Stephen and Stylianou, Mr Panagiotis and Englert, Professor Christoph
Authors: Brown, S., Englert, C., Galler, P., and Stylianou, P.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review D
Publisher:American Physical Society
ISSN (Online):2470-0029
Copyright Holders:Copyright © 2020 American Physical Society
First Published:First published in Physical Review D 102:075021
Publisher Policy:Reproduced under a Creative Commons Licence
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
173809Phenomenology from Lattice QCD and Collider PhysicsChristine DaviesScience and Technology Facilities Council (STFC)ST/P000746/1P&S - Physics & Astronomy
308821STFC Glasgow 2019 DTPMartin HendryScience and Technology Facilities Council (STFC)ST/T506102/1P&S - Physics & Astronomy