Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC

We present a phenomenological analysis of the recent Tevatron results on the tt̄ forward-backward asymmetry and invariant-mass spectrum assuming a new contribution from an s-channel gluon resonance with a mass in the range from 700 to 2500GeV. In contrast to most of the previous works, this analysis...

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Detalles Bibliográficos
Autores principales:	Álvarez, E., Rold, L.D., Vietto, J.I.S., Szynkman, A.
Formato:	JOUR
Materias:	Heavy Quark Physics Quark Masses and SM Parameters Standard Mode Technicolor and Composite Models
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_11266708_v2011_n9_p_Alvarez
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_11266708_v2011_n9_p_Alvarez
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spelling	todo:paper_11266708_v2011_n9_p_Alvarez2023-10-03T16:06:49Z Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC Álvarez, E. Rold, L.D. Vietto, J.I.S. Szynkman, A. Heavy Quark Physics Quark Masses and SM Parameters Standard Mode Technicolor and Composite Models We present a phenomenological analysis of the recent Tevatron results on the tt̄ forward-backward asymmetry and invariant-mass spectrum assuming a new contribution from an s-channel gluon resonance with a mass in the range from 700 to 2500GeV. In contrast to most of the previous works, this analysis shows that for masses below ∼ 1TeV resonant New Physics could accommodate the experimental data. In general, we find that axial-like couplings are preferred for light and top quark couplings, and that only top quark couples strongly to New Physics. We find that composite model scenarios arise naturally from only phenomenological analyses of the experimental results. We show that our results are compatible with recent LHC limits in dijet and tt̄ production, and find some tension for large resonance mass ∼ 2.5 TeV. We indicate as best observables for discriminating a relatively light new gluon a better resolution in CDF forward-backward asymmetry, as well as the tt̄ charge asymmetry and invariant-mass spectrum at the LHC. © SISSA 2011. Fil:Szynkman, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_11266708_v2011_n9_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	Heavy Quark Physics Quark Masses and SM Parameters Standard Mode Technicolor and Composite Models
spellingShingle	Heavy Quark Physics Quark Masses and SM Parameters Standard Mode Technicolor and Composite Models Álvarez, E. Rold, L.D. Vietto, J.I.S. Szynkman, A. Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC
topic_facet	Heavy Quark Physics Quark Masses and SM Parameters Standard Mode Technicolor and Composite Models
description	We present a phenomenological analysis of the recent Tevatron results on the tt̄ forward-backward asymmetry and invariant-mass spectrum assuming a new contribution from an s-channel gluon resonance with a mass in the range from 700 to 2500GeV. In contrast to most of the previous works, this analysis shows that for masses below ∼ 1TeV resonant New Physics could accommodate the experimental data. In general, we find that axial-like couplings are preferred for light and top quark couplings, and that only top quark couples strongly to New Physics. We find that composite model scenarios arise naturally from only phenomenological analyses of the experimental results. We show that our results are compatible with recent LHC limits in dijet and tt̄ production, and find some tension for large resonance mass ∼ 2.5 TeV. We indicate as best observables for discriminating a relatively light new gluon a better resolution in CDF forward-backward asymmetry, as well as the tt̄ charge asymmetry and invariant-mass spectrum at the LHC. © SISSA 2011.
format	JOUR
author	Álvarez, E. Rold, L.D. Vietto, J.I.S. Szynkman, A.
author_facet	Álvarez, E. Rold, L.D. Vietto, J.I.S. Szynkman, A.
author_sort	Álvarez, E.
title	Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC
title_short	Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC
title_full	Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC
title_fullStr	Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC
title_full_unstemmed	Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC
title_sort	phenomenology of a light gluon resonance in top-physics at tevatron and lhc
url	http://hdl.handle.net/20.500.12110/paper_11266708_v2011_n9_p_Alvarez
work_keys_str_mv	AT alvareze phenomenologyofalightgluonresonanceintopphysicsattevatronandlhc AT roldld phenomenologyofalightgluonresonanceintopphysicsattevatronandlhc AT viettojis phenomenologyofalightgluonresonanceintopphysicsattevatronandlhc AT szynkmana phenomenologyofalightgluonresonanceintopphysicsattevatronandlhc
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Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC

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