A composite Higgs model analysis of forward-backward asymmetries in the production of tops at Tevatron and bottoms at LEP and SLC

We perform a joint analysis of the prediction of composite Higgs models for the discrepancies of the forward-backward asymmetries of top and bottom quarks at Tevatron and LEP+SLC, respectively. We build a two sector model which can be thought as an effective low energy description of 5D warped model...

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Detalles Bibliográficos
Autores principales: Alvarez, Ezequiel, Da Rold, Leandro, Szynkman, Alejandro Andrés
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2011
Materias:
Física
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/132506
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-132506
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
spellingShingle Física
Alvarez, Ezequiel
Da Rold, Leandro
Szynkman, Alejandro Andrés
A composite Higgs model analysis of forward-backward asymmetries in the production of tops at Tevatron and bottoms at LEP and SLC
topic_facet Física
description We perform a joint analysis of the prediction of composite Higgs models for the discrepancies of the forward-backward asymmetries of top and bottom quarks at Tevatron and LEP+SLC, respectively. We build a two sector model which can be thought as an effective low energy description of 5D warped models and choose the quantum numbers of the fermionic resonances to protect the Z-couplings of the partially composite Standard Model light quarks. We analyze the cross section, forward-backward asymmetry and invariant mass distribution of the top anti-top production at Tevatron, as well as the bottom forward-backward asymmetry and the Z-branching fraction into b-quarks at LEP and SLC, for the two sector model. In the region of the parameter space that naturally leads to the Standard Model spectrum and solves the bottom anomaly, the model improves the top forward-backward asymmetry, giving a prediction of up to 10%, and predicts a small decrease of the tt¯ cross section. It also predicts non-universal corrections of the Z-couplings to the light quarks of order 0.001.
format Articulo
Preprint
author Alvarez, Ezequiel
Da Rold, Leandro
Szynkman, Alejandro Andrés
author_facet Alvarez, Ezequiel
Da Rold, Leandro
Szynkman, Alejandro Andrés
author_sort Alvarez, Ezequiel
title A composite Higgs model analysis of forward-backward asymmetries in the production of tops at Tevatron and bottoms at LEP and SLC
title_short A composite Higgs model analysis of forward-backward asymmetries in the production of tops at Tevatron and bottoms at LEP and SLC
title_full A composite Higgs model analysis of forward-backward asymmetries in the production of tops at Tevatron and bottoms at LEP and SLC
title_fullStr A composite Higgs model analysis of forward-backward asymmetries in the production of tops at Tevatron and bottoms at LEP and SLC
title_full_unstemmed A composite Higgs model analysis of forward-backward asymmetries in the production of tops at Tevatron and bottoms at LEP and SLC
title_sort composite higgs model analysis of forward-backward asymmetries in the production of tops at tevatron and bottoms at lep and slc
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/132506
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