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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Autores principales:	Álvarez, E., Roldb, L.D., Szynkmanc, A.
Formato:	JOUR
Materias:	Beyond standard model Technicolor and composite models
Acceso en línea:	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	todo:paper_11266708_v2011_n5_p_Alvarez
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spelling	todo:paper_11266708_v2011_n5_p_Alvarez2023-10-03T16:06:48Z A composite Higgs model analysis of forward-backward asymmetries in the production of tops at Tevatron and bottoms at LEP and SLC Álvarez, E. Roldb, L.D. Szynkmanc, A. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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 Álvarez, E. Roldb, L.D. Szynkmanc, A. 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.
format	JOUR
author	Álvarez, E. Roldb, L.D. Szynkmanc, A.
author_facet	Álvarez, E. Roldb, L.D. Szynkmanc, A.
author_sort	Álvarez, E.
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
url	http://hdl.handle.net/20.500.12110/paper_11266708_v2011_n5_p_Alvarez
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A composite Higgs model analysis of forward-backward asymmetries in the production of tops at Tevatron and bottoms at LEP and SLC

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