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
Publicado: 2011
Materias:
Beyond standard model
Technicolor and composite models
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11266708_v2011_n5_p_Alvarez
http://hdl.handle.net/20.500.12110/paper_11266708_v2011_n5_p_Alvarez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_11266708_v2011_n5_p_Alvarez
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spelling paper:paper_11266708_v2011_n5_p_Alvarez2023-06-08T16:08:13Z A composite Higgs model analysis of forward-backward asymmetries in the production of tops at Tevatron and bottoms at LEP and SLC Beyond standard model Technicolor and composite models 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 t̄t cross section. It also predicts non-universal corrections of the Z-couplings to the light quarks of order 0.001. © SISSA 2011. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11266708_v2011_n5_p_Alvarez http://hdl.handle.net/20.500.12110/paper_11266708_v2011_n5_p_Alvarez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Beyond standard model
Technicolor and composite models
spellingShingle Beyond standard model
Technicolor and composite models
A composite Higgs model analysis of forward-backward asymmetries in the production of tops at Tevatron and bottoms at LEP and SLC
topic_facet Beyond standard model
Technicolor and composite models
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 t̄t cross section. It also predicts non-universal corrections of the Z-couplings to the light quarks of order 0.001. © SISSA 2011.
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 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11266708_v2011_n5_p_Alvarez
http://hdl.handle.net/20.500.12110/paper_11266708_v2011_n5_p_Alvarez
_version_ 1768541951145017344

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