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Search for New Light Higgs Bosons in Boosted Tau Final States with the CMS Experiment

In this dissertation, I present a search for non-standard decays of a Standard Model-likeHiggs boson to pairs of light bosons, as predicted in models with extended Higgs sectors.In two Higgs doublet models, including the next-to-minimal supersymmetric standardmodel, the Higgs boson can decay into a...

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Autor principal: Ricci-Tam, Francesca
Lenguaje:eng
Publicado: 2016
Materias:
Acceso en línea:http://cds.cern.ch/record/2137267
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author Ricci-Tam, Francesca
author_facet Ricci-Tam, Francesca
author_sort Ricci-Tam, Francesca
collection CERN
description In this dissertation, I present a search for non-standard decays of a Standard Model-likeHiggs boson to pairs of light bosons, as predicted in models with extended Higgs sectors.In two Higgs doublet models, including the next-to-minimal supersymmetric standardmodel, the Higgs boson can decay into a pair of light pseudoscalars a.In this search, the gluon fusion, W and Z associated Higgs, and vector boson fusionproduction channels for the Higgs are all considered, and the decay H →aa with a → τ τis reconstructed from the tau decay products. The final state is characterized by oneisolated high pT muon plus at least one highly boosted pair of taus, of which one of thetaus is required to decay to a muon.Using 19.7 fb−1 of 8 TeV center of mass pp collision data recorded by the CompactMuon Solenoid experiment at the Large Hadron Collider, a counting experiment is performed in a region of high di-tau invariant mass. We have found no excess of events abovethe Standard Model backgrounds, and the observed data is used to set upper limits on thebranching ratio Br(H →aa)Br2 (a → τ τ ). These results are equally applicable to decaysof the SM-like Higgs boson to a pair of light scalars h.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2016
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spelling cern-21478622019-09-30T06:29:59Zhttp://cds.cern.ch/record/2137267engRicci-Tam, FrancescaSearch for New Light Higgs Bosons in Boosted Tau Final States with the CMS ExperimentParticle Physics - ExperimentDetectors and Experimental TechniquesIn this dissertation, I present a search for non-standard decays of a Standard Model-likeHiggs boson to pairs of light bosons, as predicted in models with extended Higgs sectors.In two Higgs doublet models, including the next-to-minimal supersymmetric standardmodel, the Higgs boson can decay into a pair of light pseudoscalars a.In this search, the gluon fusion, W and Z associated Higgs, and vector boson fusionproduction channels for the Higgs are all considered, and the decay H →aa with a → τ τis reconstructed from the tau decay products. The final state is characterized by oneisolated high pT muon plus at least one highly boosted pair of taus, of which one of thetaus is required to decay to a muon.Using 19.7 fb−1 of 8 TeV center of mass pp collision data recorded by the CompactMuon Solenoid experiment at the Large Hadron Collider, a counting experiment is performed in a region of high di-tau invariant mass. We have found no excess of events abovethe Standard Model backgrounds, and the observed data is used to set upper limits on thebranching ratio Br(H →aa)Br2 (a → τ τ ). These results are equally applicable to decaysof the SM-like Higgs boson to a pair of light scalars h.CERN-THESIS-2016-012CMS-TS-2016-005oai:cds.cern.ch:21478622016-03-07T23:12:48Z
spellingShingle Particle Physics - Experiment
Detectors and Experimental Techniques
Ricci-Tam, Francesca
Search for New Light Higgs Bosons in Boosted Tau Final States with the CMS Experiment
title Search for New Light Higgs Bosons in Boosted Tau Final States with the CMS Experiment
title_full Search for New Light Higgs Bosons in Boosted Tau Final States with the CMS Experiment
title_fullStr Search for New Light Higgs Bosons in Boosted Tau Final States with the CMS Experiment
title_full_unstemmed Search for New Light Higgs Bosons in Boosted Tau Final States with the CMS Experiment
title_short Search for New Light Higgs Bosons in Boosted Tau Final States with the CMS Experiment
title_sort search for new light higgs bosons in boosted tau final states with the cms experiment
topic Particle Physics - Experiment
Detectors and Experimental Techniques
url http://cds.cern.ch/record/2137267
work_keys_str_mv AT riccitamfrancesca searchfornewlighthiggsbosonsinboostedtaufinalstateswiththecmsexperiment