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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2015
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v743_n_p366_ColuccioLeskow http://hdl.handle.net/20.500.12110/paper_03702693_v743_n_p366_ColuccioLeskow |
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paper:paper_03702693_v743_n_p366_ColuccioLeskow2023-06-08T15:37:18Z Vector-like quarks with a scalar triplet 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. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v743_n_p366_ColuccioLeskow 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 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. |
| 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 |
| publishDate |
2015 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v743_n_p366_ColuccioLeskow http://hdl.handle.net/20.500.12110/paper_03702693_v743_n_p366_ColuccioLeskow |
| _version_ |
1768546543236808704 |