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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Autores principales: | , , , , , |
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Formato: | Articulo |
Lenguaje: | Inglés |
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2011
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Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/84731 |
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I19-R120-10915-84731 |
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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 |
work_keys_str_mv |
AT kiersken usingtbbctosearchfornewphysics AT knightontal usingtbbctosearchfornewphysics AT londondavid usingtbbctosearchfornewphysics AT russellmatthew usingtbbctosearchfornewphysics AT szynkmanalejandroandres usingtbbctosearchfornewphysics AT websterkari usingtbbctosearchfornewphysics |
bdutipo_str |
Repositorios |
_version_ |
1764820489145942016 |