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 tt¯ 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 2500 GeV. In contrast to most of the previous works, this analysi...

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Detalles Bibliográficos
Autores principales: Alvarez, Ezequiel, Da Rold, Leandro, Sánchez Vietto, Juan Ignacio, Szynkman, Alejandro Andrés
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2011
Materias:
Física
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/132511
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-132511
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
Sánchez Vietto, Juan Ignacio
Szynkman, Alejandro Andrés
Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC
topic_facet Física
description We present a phenomenological analysis of the recent Tevatron results on the tt¯ 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 2500 GeV. In contrast to most of the previous works, this analysis shows that for masses below ∼ 1 TeV 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 tt¯ 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 tt¯ charge asymmetry and invariant-mass spectrum at the LHC.
format Articulo
Preprint
author Alvarez, Ezequiel
Da Rold, Leandro
Sánchez Vietto, Juan Ignacio
Szynkman, Alejandro Andrés
author_facet Alvarez, Ezequiel
Da Rold, Leandro
Sánchez Vietto, Juan Ignacio
Szynkman, Alejandro Andrés
author_sort Alvarez, Ezequiel
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 http://sedici.unlp.edu.ar/handle/10915/132511
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AT daroldleandro phenomenologyofalightgluonresonanceintopphysicsattevatronandlhc
AT sanchezviettojuanignacio phenomenologyofalightgluonresonanceintopphysicsattevatronandlhc
AT szynkmanalejandroandres phenomenologyofalightgluonresonanceintopphysicsattevatronandlhc
bdutipo_str Repositorios
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