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Coluccio Leskow, E.; Martin, T.A.W.; de la Puente, A. "Vector-like quarks with a scalar triplet" (2015) Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 743:366-376
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Abstract:

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.

Registro:

Documento: Artículo
Título:Vector-like quarks with a scalar triplet
Autor:Coluccio Leskow, E.; Martin, T.A.W.; de la Puente, A.
Filiación:CONICET, IFIBA, Departamento de Física, FCEyN, Universidad de Buenos Aires, Ciudad Universitaria, Pab. 1, Ciudad de Buenos Aires, 1428, Argentina
TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada
Palabras clave:Direct collider constraints; Electroweak precision constraints; Naturalness; Scalar triplets; Top partner; Vector-like quark
Año:2015
Volumen:743
Página de inicio:366
Página de fin:376
DOI: http://dx.doi.org/10.1016/j.physletb.2015.02.071
Título revista:Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Título revista abreviado:Phys Lett Sect B Nucl Elem Part High-Energy Phys
ISSN:03702693
CODEN:PYLBA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v743_n_p366_ColuccioLeskow

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Citas:

---------- APA ----------
Coluccio Leskow, E., Martin, T.A.W. & de la Puente, A. (2015) . Vector-like quarks with a scalar triplet. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 743, 366-376.
http://dx.doi.org/10.1016/j.physletb.2015.02.071
---------- CHICAGO ----------
Coluccio Leskow, E., Martin, T.A.W., de la Puente, A. "Vector-like quarks with a scalar triplet" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 743 (2015) : 366-376.
http://dx.doi.org/10.1016/j.physletb.2015.02.071
---------- MLA ----------
Coluccio Leskow, E., Martin, T.A.W., de la Puente, A. "Vector-like quarks with a scalar triplet" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 743, 2015, pp. 366-376.
http://dx.doi.org/10.1016/j.physletb.2015.02.071
---------- VANCOUVER ----------
Coluccio Leskow, E., Martin, T.A.W., de la Puente, A. Vector-like quarks with a scalar triplet. Phys Lett Sect B Nucl Elem Part High-Energy Phys. 2015;743:366-376.
http://dx.doi.org/10.1016/j.physletb.2015.02.071