Graviton resonance phenomenology and a pseudo-Nambu-Goldstone boson Higgs at the LHC

We present an effective description of a spin two massive state and a pseudo-Nambu-Goldstone boson Higgs in a two site model. Using this framework, we model the spin-two state as a massive graviton and we study its phenomenology at the LHC. We find that a reduced set of parameters can describe the m...

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Detalles Bibliográficos
Autores principales: Alvarez, Ezequiel, Da Rold, Leandro, Mazzitelli, Javier Sebastián, Szynkman, Alejandro Andrés
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2017
Materias:
Física
LHC
Graviton resonance
Composite models
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/98134
https://ri.conicet.gov.ar/11336/63220
http://link.aps.org/doi/10.1103/PhysRevD.95.115012
https://arxiv.org/abs/1610.08451
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-98134
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
LHC
Graviton resonance
Composite models
spellingShingle Física
LHC
Graviton resonance
Composite models
Alvarez, Ezequiel
Da Rold, Leandro
Mazzitelli, Javier Sebastián
Szynkman, Alejandro Andrés
Graviton resonance phenomenology and a pseudo-Nambu-Goldstone boson Higgs at the LHC
topic_facet Física
LHC
Graviton resonance
Composite models
description We present an effective description of a spin two massive state and a pseudo-Nambu-Goldstone boson Higgs in a two site model. Using this framework, we model the spin-two state as a massive graviton and we study its phenomenology at the LHC. We find that a reduced set of parameters can describe the most important features of this scenario. We address the question of which channel is the most sensitive to detect this graviton. Instead of designing search strategies to estimate the significance in each channel, we compare the ratio of our theoretical predictions to the limits set by available experimental searches for all the decay channels and as a function of the free parameters in the model. We discuss the phenomenological details contained in the outcome of this simple procedure. The results indicate that, for the studied masses between 0.5 and 3 TeV, the channels to look for such a graviton resonance are mainly ZZ, WW, and γγ. This is the case even though top and bottom quarks dominate the branching ratios, since their experimental sensitivity is not as good as the one of the electroweak gauge bosons. We find that as the graviton mass increases, the ZZ and WW channels become more important because of its relatively better enhancement over background, mainly due to fat jet techniques. We determine the region of the parameter space that has already been excluded and the reach for the LHC next stages. We also estimate the size of the loop-induced contributions to the production and decay of the graviton, and show in which region of the parameter space their effects are relevant for our analysis.
format Articulo
Preprint
author Alvarez, Ezequiel
Da Rold, Leandro
Mazzitelli, Javier Sebastián
Szynkman, Alejandro Andrés
author_facet Alvarez, Ezequiel
Da Rold, Leandro
Mazzitelli, Javier Sebastián
Szynkman, Alejandro Andrés
author_sort Alvarez, Ezequiel
title Graviton resonance phenomenology and a pseudo-Nambu-Goldstone boson Higgs at the LHC
title_short Graviton resonance phenomenology and a pseudo-Nambu-Goldstone boson Higgs at the LHC
title_full Graviton resonance phenomenology and a pseudo-Nambu-Goldstone boson Higgs at the LHC
title_fullStr Graviton resonance phenomenology and a pseudo-Nambu-Goldstone boson Higgs at the LHC
title_full_unstemmed Graviton resonance phenomenology and a pseudo-Nambu-Goldstone boson Higgs at the LHC
title_sort graviton resonance phenomenology and a pseudo-nambu-goldstone boson higgs at the lhc
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/98134
https://ri.conicet.gov.ar/11336/63220
http://link.aps.org/doi/10.1103/PhysRevD.95.115012
https://arxiv.org/abs/1610.08451
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