Using t→bb̄c to search for new physics

We consider new-physics (NP) contributions to the decay t→bb̄c. We parametrize the NP couplings by an effective Lagrangian consisting of 10 Lorentz structures. We show that the presence of NP can be detected through the measurement of the partial width. A partial identification of the NP can be achi...

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Detalles Bibliográficos
Autores principales: Kiers, Ken, Knighton, Tal, London, David, Russell, Matthew, Szynkman, Alejandro Andrés, Webster, Kari
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Física
Ciencias Exactas
flavor changing neutral current
New physics
Nueva física
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84731
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84731
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Ciencias Exactas
flavor changing neutral current
New physics
Nueva física
spellingShingle Física
Ciencias Exactas
flavor changing neutral current
New physics
Nueva física
Kiers, Ken
Knighton, Tal
London, David
Russell, Matthew
Szynkman, Alejandro Andrés
Webster, Kari
Using t→bb̄c to search for new physics
topic_facet Física
Ciencias Exactas
flavor changing neutral current
New physics
Nueva física
description We consider new-physics (NP) contributions to the decay t→bb̄c. We parametrize the NP couplings by an effective Lagrangian consisting of 10 Lorentz structures. We show that the presence of NP can be detected through the measurement of the partial width. A partial identification of the NP can be achieved through the measurements of a forward-backward-like asymmetry, a top-quark-spin-dependent asymmetry, the partial-rate asymmetry, and a triple-product asymmetry. These observables, which vanish in the standard model, can all take values in the 10%-20% range in the presence of NP. Since |V tbVcb|VtsVcs|, most of our results also hold, with small changes, for t→ss̄c.
format Articulo
Articulo
author Kiers, Ken
Knighton, Tal
London, David
Russell, Matthew
Szynkman, Alejandro Andrés
Webster, Kari
author_facet Kiers, Ken
Knighton, Tal
London, David
Russell, Matthew
Szynkman, Alejandro Andrés
Webster, Kari
author_sort Kiers, Ken
title Using t→bb̄c to search for new physics
title_short Using t→bb̄c to search for new physics
title_full Using t→bb̄c to search for new physics
title_fullStr Using t→bb̄c to search for new physics
title_full_unstemmed Using t→bb̄c to search for new physics
title_sort using t→bb̄c to search for new physics
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/84731
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AT szynkmanalejandroandres usingtbbctosearchfornewphysics
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bdutipo_str Repositorios
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