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First Glimpses at Higgs' face

The 8 TeV LHC Higgs search data just released indicates the existence of a scalar resonance with mass ~ 125 GeV. We examine the implications of the data reported by ATLAS, CMS and the Tevatron collaborations on understanding the properties of this scalar by performing joint fits on its couplings to...

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Detalles Bibliográficos
Autores principales: Espinosa, J.R., Grojean, C., Muhlleitner, M., Trott, M.
Lenguaje:eng
Publicado: 2012
Materias:
Acceso en línea:https://dx.doi.org/10.1007/JHEP12(2012)045
http://cds.cern.ch/record/1460766
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author Espinosa, J.R.
Grojean, C.
Muhlleitner, M.
Trott, M.
author_facet Espinosa, J.R.
Grojean, C.
Muhlleitner, M.
Trott, M.
author_sort Espinosa, J.R.
collection CERN
description The 8 TeV LHC Higgs search data just released indicates the existence of a scalar resonance with mass ~ 125 GeV. We examine the implications of the data reported by ATLAS, CMS and the Tevatron collaborations on understanding the properties of this scalar by performing joint fits on its couplings to other Standard Model particles. We discuss and characterize to what degree this resonance has the properties of the Standard Model (SM) Higgs, and consider what implications can be extracted for New Physics in a (mostly) model-independent fashion. We find that, if the Higgs couplings to fermions and weak vector bosons are allowed to differ from their standard values, the SM is ~ 2 sigma from the best fit point to current data. Fitting to a possible invisible decay branching ratio, we find BR_{inv} = 0.05\pm 0.32\ (95% C.L.) We also discuss and develop some ways of using the data in order to bound or rule out models which modify significantly the properties of this scalar resonance and apply these techniques to the global current data set.
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institution Organización Europea para la Investigación Nuclear
language eng
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spelling cern-14607662019-09-30T06:29:59Zdoi:10.1007/JHEP12(2012)045http://cds.cern.ch/record/1460766engEspinosa, J.R.Grojean, C.Muhlleitner, M.Trott, M.First Glimpses at Higgs' faceParticle Physics - PhenomenologyThe 8 TeV LHC Higgs search data just released indicates the existence of a scalar resonance with mass ~ 125 GeV. We examine the implications of the data reported by ATLAS, CMS and the Tevatron collaborations on understanding the properties of this scalar by performing joint fits on its couplings to other Standard Model particles. We discuss and characterize to what degree this resonance has the properties of the Standard Model (SM) Higgs, and consider what implications can be extracted for New Physics in a (mostly) model-independent fashion. We find that, if the Higgs couplings to fermions and weak vector bosons are allowed to differ from their standard values, the SM is ~ 2 sigma from the best fit point to current data. Fitting to a possible invisible decay branching ratio, we find BR_{inv} = 0.05\pm 0.32\ (95% C.L.) We also discuss and develop some ways of using the data in order to bound or rule out models which modify significantly the properties of this scalar resonance and apply these techniques to the global current data set.The 8 TeV LHC Higgs search data just released indicates the existence of a scalar resonance with mass ~ 125 GeV. We examine the implications of the data reported by ATLAS, CMS and the Tevatron collaborations on understanding the properties of this scalar by performing joint fits on its couplings to other Standard Model particles. We discuss and characterize to what degree this resonance has the properties of the Standard Model (SM) Higgs, and consider what implications can be extracted for New Physics in a (mostly) model-independent fashion. We find that, if the Higgs couplings to fermions and weak vector bosons are allowed to differ from their standard values, the SM is ~ 2 sigma from the best fit point to current data. Fitting to a possible invisible decay branching ratio, we find BR_{inv} = 0.05\pm 0.32\ (95% C.L.) We also discuss and develop some ways of using the data in order to bound or rule out models which modify significantly the properties of this scalar resonance and apply these techniques to the global current data set.CERN-PH-TH-2012-200arXiv:1207.1717CERN-PH-TH-2012-200oai:cds.cern.ch:14607662012-07-09
spellingShingle Particle Physics - Phenomenology
Espinosa, J.R.
Grojean, C.
Muhlleitner, M.
Trott, M.
First Glimpses at Higgs' face
title First Glimpses at Higgs' face
title_full First Glimpses at Higgs' face
title_fullStr First Glimpses at Higgs' face
title_full_unstemmed First Glimpses at Higgs' face
title_short First Glimpses at Higgs' face
title_sort first glimpses at higgs' face
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1007/JHEP12(2012)045
http://cds.cern.ch/record/1460766
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