The S parameter for a Light Composite Higgs: a Dispersion Relation Approach

We derive a dispersion relation for the S parameter in the SO(5)/SO(4) Minimal Composite Higgs model. This generalizes the Peskin-Takeuchi formula to the case when a light Higgs boson is present in the spectrum. Our result combines an IR effect due to the reduction in the Higgs boson couplings with...

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Detalles Bibliográficos
Autores principales: Orgogozo, Axel, Rychkov, Slava
Lenguaje:eng
Publicado: 2012
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1007/JHEP06(2013)014
http://cds.cern.ch/record/1495967
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author Orgogozo, Axel
Rychkov, Slava
author_facet Orgogozo, Axel
Rychkov, Slava
author_sort Orgogozo, Axel
collection CERN
description We derive a dispersion relation for the S parameter in the SO(5)/SO(4) Minimal Composite Higgs model. This generalizes the Peskin-Takeuchi formula to the case when a light Higgs boson is present in the spectrum. Our result combines an IR effect due to the reduction in the Higgs boson couplings with a UV contribution from the strong sector. It also includes a finite matching term, achieving a very good relative accuracy O(m_h/m_\rho). We apply our formula in several toy examples, modeling the UV spectral density via Vector Meson Dominance.
id cern-1495967
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2012
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spelling cern-14959672023-03-14T19:37:53Zdoi:10.1007/JHEP06(2013)014http://cds.cern.ch/record/1495967engOrgogozo, AxelRychkov, SlavaThe S parameter for a Light Composite Higgs: a Dispersion Relation ApproachParticle Physics - PhenomenologyWe derive a dispersion relation for the S parameter in the SO(5)/SO(4) Minimal Composite Higgs model. This generalizes the Peskin-Takeuchi formula to the case when a light Higgs boson is present in the spectrum. Our result combines an IR effect due to the reduction in the Higgs boson couplings with a UV contribution from the strong sector. It also includes a finite matching term, achieving a very good relative accuracy O(m_h/m_\rho). We apply our formula in several toy examples, modeling the UV spectral density via Vector Meson Dominance.We derive a dispersion relation for the S parameter in the SO(5)/SO(4) Minimal Composite Higgs model. This generalizes the Peskin-Takeuchi formula to the case when a light Higgs boson is present in the spectrum. Our result combines an IR effect due to the reduction in the Higgs boson couplings with a UV contribution from the strong sector. It also includes a finite matching term, achieving a very good relative accuracy O(m ( )h( ) /m ( )ρ( )). We apply our formula in several toy examples, modeling the UV spectral density via Vector Meson Dominance.We derive a dispersion relation for the S parameter in the SO(5)/SO(4) Minimal Composite Higgs model. This generalizes the Peskin-Takeuchi formula to the case when a light Higgs boson is present in the spectrum. Our result combines an IR effect due to the reduction in the Higgs boson couplings with a UV contribution from the strong sector. It also includes a finite matching term, achieving a very good relative accuracy O(m_h/m_\rho). We apply our formula in several toy examples, modeling the UV spectral density via Vector Meson Dominance.arXiv:1211.5543LPTENS-12-35CERN-PH-TH-2012-324LPTENS-12-35CERN-PH-TH-2012-324oai:cds.cern.ch:14959672012-11-26
spellingShingle Particle Physics - Phenomenology
Orgogozo, Axel
Rychkov, Slava
The S parameter for a Light Composite Higgs: a Dispersion Relation Approach
title The S parameter for a Light Composite Higgs: a Dispersion Relation Approach
title_full The S parameter for a Light Composite Higgs: a Dispersion Relation Approach
title_fullStr The S parameter for a Light Composite Higgs: a Dispersion Relation Approach
title_full_unstemmed The S parameter for a Light Composite Higgs: a Dispersion Relation Approach
title_short The S parameter for a Light Composite Higgs: a Dispersion Relation Approach
title_sort s parameter for a light composite higgs: a dispersion relation approach
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1007/JHEP06(2013)014
http://cds.cern.ch/record/1495967
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AT rychkovslava thesparameterforalightcompositehiggsadispersionrelationapproach
AT orgogozoaxel sparameterforalightcompositehiggsadispersionrelationapproach
AT rychkovslava sparameterforalightcompositehiggsadispersionrelationapproach

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