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

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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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Autor principal: Szynkman, Alejandro Andrés
Publicado: 2011
Materias:
Heavy Quark Physics
Quark Masses and SM Parameters
Standard Mode
Technicolor and Composite Models
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11266708_v2011_n9_p_Alvarez
http://hdl.handle.net/20.500.12110/paper_11266708_v2011_n9_p_Alvarez
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_11266708_v2011_n9_p_Alvarez2023-06-08T16:08:14Z Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC Szynkman, Alejandro Andrés 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. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11266708_v2011_n9_p_Alvarez 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
Szynkman, Alejandro Andrés
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.
author Szynkman, Alejandro Andrés
author_facet Szynkman, Alejandro Andrés
author_sort Szynkman, Alejandro Andrés
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
publishDate 2011
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11266708_v2011_n9_p_Alvarez
http://hdl.handle.net/20.500.12110/paper_11266708_v2011_n9_p_Alvarez
work_keys_str_mv AT szynkmanalejandroandres phenomenologyofalightgluonresonanceintopphysicsattevatronandlhc
_version_ 1768544004373217280

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