Vector-like quarks with a scalar triplet

We study a minimal extension to the Standard Model with an additional real scalar triplet, σ, and a single vector-like quark, T. This class of models appear naturally in extensions of the Littlest Higgs model that incorporate dark matter without the need of T-parity. We assume the limit that the tri...

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Autores principales: Coluccio Leskow, E., Martin, T.A.W., de la Puente, A.
Formato: JOUR
Materias:
Direct collider constraints
Electroweak precision constraints
Naturalness
Scalar triplets
Top partner
Vector-like quark
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03702693_v743_n_p366_ColuccioLeskow
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_03702693_v743_n_p366_ColuccioLeskow
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spelling todo:paper_03702693_v743_n_p366_ColuccioLeskow2023-10-03T15:29:38Z Vector-like quarks with a scalar triplet Coluccio Leskow, E. Martin, T.A.W. de la Puente, A. Direct collider constraints Electroweak precision constraints Naturalness Scalar triplets Top partner Vector-like quark We study a minimal extension to the Standard Model with an additional real scalar triplet, σ, and a single vector-like quark, T. This class of models appear naturally in extensions of the Littlest Higgs model that incorporate dark matter without the need of T-parity. We assume the limit that the triplet does not develop a vacuum expectation value and that all dimension five operators coupling the triplet to Standard Model fields and the vector-like quarks are characterized by the scale Λ at which we expect new physics to arise. We introduce new non-renormalizable interactions between the new scalar sector and fermion sector that allow mixing between the Standard Model third generation up-type quark and the vector-like quark in a way that leads to the cancellation of the leading quadratic divergences to the one-loop corrections from the top quark to the mass of the Higgs boson. Within this framework, new decay modes of the vector-like quark to the real scalar triplet and SM particles arise and bring forth an opportunity to probe this model with existing and future LHC data. We contrast constraints from direct colliders searches with low energy precision measurements and find that heavy vector-like top quarks with a mass as low as 650 GeV are consistent with current experimental constraints in models where new physics arises at scales below 2 TeV. © 2015 The Authors. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03702693_v743_n_p366_ColuccioLeskow
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Direct collider constraints
Electroweak precision constraints
Naturalness
Scalar triplets
Top partner
Vector-like quark
spellingShingle Direct collider constraints
Electroweak precision constraints
Naturalness
Scalar triplets
Top partner
Vector-like quark
Coluccio Leskow, E.
Martin, T.A.W.
de la Puente, A.
Vector-like quarks with a scalar triplet
topic_facet Direct collider constraints
Electroweak precision constraints
Naturalness
Scalar triplets
Top partner
Vector-like quark
description We study a minimal extension to the Standard Model with an additional real scalar triplet, σ, and a single vector-like quark, T. This class of models appear naturally in extensions of the Littlest Higgs model that incorporate dark matter without the need of T-parity. We assume the limit that the triplet does not develop a vacuum expectation value and that all dimension five operators coupling the triplet to Standard Model fields and the vector-like quarks are characterized by the scale Λ at which we expect new physics to arise. We introduce new non-renormalizable interactions between the new scalar sector and fermion sector that allow mixing between the Standard Model third generation up-type quark and the vector-like quark in a way that leads to the cancellation of the leading quadratic divergences to the one-loop corrections from the top quark to the mass of the Higgs boson. Within this framework, new decay modes of the vector-like quark to the real scalar triplet and SM particles arise and bring forth an opportunity to probe this model with existing and future LHC data. We contrast constraints from direct colliders searches with low energy precision measurements and find that heavy vector-like top quarks with a mass as low as 650 GeV are consistent with current experimental constraints in models where new physics arises at scales below 2 TeV. © 2015 The Authors.
format JOUR
author Coluccio Leskow, E.
Martin, T.A.W.
de la Puente, A.
author_facet Coluccio Leskow, E.
Martin, T.A.W.
de la Puente, A.
author_sort Coluccio Leskow, E.
title Vector-like quarks with a scalar triplet
title_short Vector-like quarks with a scalar triplet
title_full Vector-like quarks with a scalar triplet
title_fullStr Vector-like quarks with a scalar triplet
title_full_unstemmed Vector-like quarks with a scalar triplet
title_sort vector-like quarks with a scalar triplet
url http://hdl.handle.net/20.500.12110/paper_03702693_v743_n_p366_ColuccioLeskow
work_keys_str_mv AT coluccioleskowe vectorlikequarkswithascalartriplet
AT martintaw vectorlikequarkswithascalartriplet
AT delapuentea vectorlikequarkswithascalartriplet
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