The top quark right coupling in the tbW-vertex View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2015-12-26

AUTHORS

Gabriel A. González-Sprinberg, Jordi Vidal

ABSTRACT

The most general parametrization of the tbW vertex includes a right coupling VR\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$V_R$$\end{document} that is zero at tree level in the standard model. This quantity may be measured at the Large Hadron Collider where the physics of the top decay is currently investigated. This coupling is present in new physics models at tree level and/or through radiative corrections, so its measurement can be sensitive to non-standard physics. In this paper we compute the leading electroweak and QCD contributions to the top VR\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$V_R$$\end{document} coupling in the standard model. This value is the starting point in order to separate the standard model effects and, then, search for new physics. We also propose observables that can be addressed at the LHC in order to measure this coupling. These observables are defined in such a way that they do not receive tree level contributions from the standard model and are directly proportional to the right coupling. Bounds on new physics models can be obtained through the measurements of these observables. More... »

PAGES

615

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1140/epjc/s10052-015-3844-4

DOI

http://dx.doi.org/10.1140/epjc/s10052-015-3844-4

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1007172537


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