Hochschulschrift
Search for Higgs bosons with b-jets in the final state in proton-proton collisions with the ATLAS experiment
Zusammenfassung: This thesis discusses searches for Higgs bosons in decays with b-quark jets in the final state in data from proton-proton collisions taken with the ATLAS detector at the Large Hadron Collider (LHC).First, a search for the Standard Model (SM) Higgs boson in the associated production with a vector boson and the decay to b-quarks, VH(bb), is presented. It is based on the data recorded during Run 1 of the LHC at a center-of-mass energy of sqrt(s) = 8 TeV, corresponding to an integrated luminosity of 20.3/fb. Other SM processes yield backgrounds with cross sections much larger than for the expected Higgs boson signal. Their contribution is efficiently separated from the signal using Boosted Decision Trees (BDT). The signal contribution is estimated using a profile likelihood fit of the BDT output distributions.The signal strength with respect to the SM expectation is measured to be 0.65+0.43-0.40, corresponding to an observed (expected) significance of 1.7 (2.5) standard deviations. In combination with the analysis performed using the data taken at sqrt(s) = 7 TeV the signal strength is measured to be 0.51+0.40-0.37, corresponding to an observed (expected) significance of 1.4 (2.6) standard deviations.Additionally, a sensitivity estimate of the SM Higgs boson produced in gluon-fusion and decaying to two b quarks, gg->H->bb, is presented. This feasibility study is based on the data taken at sqrt(s) = 8 TeV. The expected statistical significance has been estimated to be 0.7 standard deviations from a likelihood ratio based on the dijet mass.The second analysis presented in this thesis is a search for decays of the Higgs boson to Beyond Standard Model (BSM) particles that are invisible to the ATLAS detector. The search has been performed in the associated production with a hadronically decaying vector boson, V(qq)H(inv). Also this analysis is based on the data taken at sqrt(s) = 8 TeV.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Notes
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Albert-Ludwigs-Universität Freiburg, Dissertation, 2016
- Classification
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Physik
- Keyword
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Physik
Elementarteilchenphysik
LHC
ATLAS
Higgs-Teilchen
b-Quark
- Event
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Veröffentlichung
- (where)
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Freiburg
- (who)
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Universität
- (when)
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2016
- Creator
- Contributor
- DOI
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10.6094/UNIFR/11321
- URN
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urn:nbn:de:bsz:25-freidok-113210
- Rights
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Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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14.08.2025, 10:46 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Object type
- Hochschulschrift
Associated
- Büscher, Daniel
- Jakobs, Karl
- Universität
Time of origin
- 2016
Other Objects (12)
Search for standard model H->tau+tau- decays in the Lepton-Hadron final state in proton-proton collisions with the ATLAS detector at the LHC : = Suche nach Standardmodell H->tau^+tau^- Zerfällen im Lepton-Hadron Endzustand in Proton-Proton Kollisionen mit dem ATLAS Detektor am LHC
Search for Neutral MSSM Higgs Bosons Decaying to tau_had tau_had in sqrt(s) : = 7 TeV Proton-Proton Collisions with the ATLAS Detector = Suche nach neutralen MSSM Higgs-Bosonen im tau_had tau_had Zerfallskanal in sqrt(s) = 7 TeV Proton-Proton-Kollisionen mit dem ATLAS Detektor
Search for the Standard Model Higgs boson in the H → W+W- → l+νl-ν̄+decay mode in proton-proton collisions at √s=7 TeV and √s=8 TeV with the ATLAS experiment
Measurement of the W->enu and Z/gamma* → ee Production Cross-Sections in Proton-Proton Collisions at √s=7 TeV with the ATLAS Experiment : = Messung der W->enu und Z/gamma* → ee Produktionswirkungsquerschnitte in Proton-Proton-Kollisionen bei einer Schwerpunktsenergie von √s=7 TeV mit dem ATLAS-Experiment
First measurement of the Z/gamma*->tautau cross section in proton-proton collisions at sqrt(s) : = 7 TeV with the ATLAS experiment at the LHC = Erste Messung des Z/gamma*->tautau Wirkungsquerschnittes in Proton-Proton-Kollisionen bei einer Schwerpunktsenergie von sqrt(s)=7 TeV mit dem ATLAS-Experiment am LHC
Observation and measurement of the electroweak W+W+jj process in proton-proton collisions at [square root]s : = 13 TeV with the ATLAS detector = Observation and measurement of the electroweak W^(pm)W^(pm)jj process in proton-proton collisions at [square root]s = 13 TeV with the ATLAS detector
Untersuchung der Produktionseigenschaften der W- und Z-Bosonen in pp-Kollisionen und Vergleich mit QCD-Modellen
Dielectron production in proton-proton collisions with ALICE
Dielectron production in proton-proton collisions with ALICE
A Measurement of W Boson pair production in pp collisions at sqrt(s)=8 TeV with the ATLAS experiment
Search for heavy lepton resonances decaying to a Z Boson and a lepton in proton-proton at [radical]s : = 8 TeV with the ATLAS detector and investigations of radiation tolerant silicon strip detectors for the high-luminosity LHC upgrade of the ATLAS inner detector
Triple Higgs boson production at a 100 TeV proton-proton collider
Search for standard model H->tau+tau- decays in the Lepton-Hadron final state in proton-proton collisions with the ATLAS detector at the LHC : = Suche nach Standardmodell H->tau^+tau^- Zerfällen im Lepton-Hadron Endzustand in Proton-Proton Kollisionen mit dem ATLAS Detektor am LHC
Search for Neutral MSSM Higgs Bosons Decaying to tau_had tau_had in sqrt(s) : = 7 TeV Proton-Proton Collisions with the ATLAS Detector = Suche nach neutralen MSSM Higgs-Bosonen im tau_had tau_had Zerfallskanal in sqrt(s) = 7 TeV Proton-Proton-Kollisionen mit dem ATLAS Detektor
Search for the Standard Model Higgs boson in the H → W+W- → l+νl-ν̄+decay mode in proton-proton collisions at √s=7 TeV and √s=8 TeV with the ATLAS experiment
Measurement of the W->enu and Z/gamma* → ee Production Cross-Sections in Proton-Proton Collisions at √s=7 TeV with the ATLAS Experiment : = Messung der W->enu und Z/gamma* → ee Produktionswirkungsquerschnitte in Proton-Proton-Kollisionen bei einer Schwerpunktsenergie von √s=7 TeV mit dem ATLAS-Experiment
First measurement of the Z/gamma*->tautau cross section in proton-proton collisions at sqrt(s) : = 7 TeV with the ATLAS experiment at the LHC = Erste Messung des Z/gamma*->tautau Wirkungsquerschnittes in Proton-Proton-Kollisionen bei einer Schwerpunktsenergie von sqrt(s)=7 TeV mit dem ATLAS-Experiment am LHC
Observation and measurement of the electroweak W+W+jj process in proton-proton collisions at [square root]s : = 13 TeV with the ATLAS detector = Observation and measurement of the electroweak W^(pm)W^(pm)jj process in proton-proton collisions at [square root]s = 13 TeV with the ATLAS detector
Untersuchung der Produktionseigenschaften der W- und Z-Bosonen in pp-Kollisionen und Vergleich mit QCD-Modellen
Dielectron production in proton-proton collisions with ALICE
Dielectron production in proton-proton collisions with ALICE
A Measurement of W Boson pair production in pp collisions at sqrt(s)=8 TeV with the ATLAS experiment
Search for heavy lepton resonances decaying to a Z Boson and a lepton in proton-proton at [radical]s : = 8 TeV with the ATLAS detector and investigations of radiation tolerant silicon strip detectors for the high-luminosity LHC upgrade of the ATLAS inner detector
Triple Higgs boson production at a 100 TeV proton-proton collider
Search for standard model H->tau+tau- decays in the Lepton-Hadron final state in proton-proton collisions with the ATLAS detector at the LHC : = Suche nach Standardmodell H->tau^+tau^- Zerfällen im Lepton-Hadron Endzustand in Proton-Proton Kollisionen mit dem ATLAS Detektor am LHC
Search for Neutral MSSM Higgs Bosons Decaying to tau_had tau_had in sqrt(s) : = 7 TeV Proton-Proton Collisions with the ATLAS Detector = Suche nach neutralen MSSM Higgs-Bosonen im tau_had tau_had Zerfallskanal in sqrt(s) = 7 TeV Proton-Proton-Kollisionen mit dem ATLAS Detektor
Search for the Standard Model Higgs boson in the H → W+W- → l+νl-ν̄+decay mode in proton-proton collisions at √s=7 TeV and √s=8 TeV with the ATLAS experiment
Measurement of the W->enu and Z/gamma* → ee Production Cross-Sections in Proton-Proton Collisions at √s=7 TeV with the ATLAS Experiment : = Messung der W->enu und Z/gamma* → ee Produktionswirkungsquerschnitte in Proton-Proton-Kollisionen bei einer Schwerpunktsenergie von √s=7 TeV mit dem ATLAS-Experiment
First measurement of the Z/gamma*->tautau cross section in proton-proton collisions at sqrt(s) : = 7 TeV with the ATLAS experiment at the LHC = Erste Messung des Z/gamma*->tautau Wirkungsquerschnittes in Proton-Proton-Kollisionen bei einer Schwerpunktsenergie von sqrt(s)=7 TeV mit dem ATLAS-Experiment am LHC
Observation and measurement of the electroweak W+W+jj process in proton-proton collisions at [square root]s : = 13 TeV with the ATLAS detector = Observation and measurement of the electroweak W^(pm)W^(pm)jj process in proton-proton collisions at [square root]s = 13 TeV with the ATLAS detector
Untersuchung der Produktionseigenschaften der W- und Z-Bosonen in pp-Kollisionen und Vergleich mit QCD-Modellen
Dielectron production in proton-proton collisions with ALICE
Dielectron production in proton-proton collisions with ALICE
A Measurement of W Boson pair production in pp collisions at sqrt(s)=8 TeV with the ATLAS experiment
Search for heavy lepton resonances decaying to a Z Boson and a lepton in proton-proton at [radical]s : = 8 TeV with the ATLAS detector and investigations of radiation tolerant silicon strip detectors for the high-luminosity LHC upgrade of the ATLAS inner detector