Search for the H → b¯b decay mode of the Standard Model Higgs boson in associated production with a vector boson in proton-proton collisions at √s = 8 TeV with the ATLAS experiment
Search for the H → b¯b decay mode of the Standard Model Higgs boson in associated production with a vector boson in proton-proton collisions at √s = 8 TeV with the ATLAS experiment
dc.contributor.advisor | Wermes, Norbert | |
dc.contributor.author | Therhaag, Jan | |
dc.date.accessioned | 2020-04-19T22:37:34Z | |
dc.date.available | 2020-04-19T22:37:34Z | |
dc.date.issued | 11.06.2014 | |
dc.identifier.uri | https://hdl.handle.net/20.500.11811/6100 | |
dc.description.abstract | In this thesis, a search for the H→b¯b decay mode of the Standard Model Higgs boson in associated production with a vector boson is presented. The search is based on the entire data-set recorded by the ATLAS experiment in 2012 amounting to 20.3fb-1 of data. A novel search strategy based on a machine learning approach using boosted decision trees and a variable set constructed from Lorentz invariant quantities is introduced. No significant excess above the Standard Model background expectation is observed. For a Higgs boson mass of mH=125GeV, the expected upper limit on the Higgs boson production cross section assuming the absence of signal is 2.06×σSM, while the observed limit is 3.15×σSM. This excess corresponds to a local significance of 1.1 standard deviations. The ratio of the measured signal strength to the Standard Model expectation is μ=1.40±0.95. | |
dc.language.iso | eng | |
dc.rights | In Copyright | |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | |
dc.subject | Teilchenphysik | |
dc.subject | Higgs | |
dc.subject | ATLAS | |
dc.subject | Hbb | |
dc.subject | multivariate Methoden | |
dc.subject | particle physics | |
dc.subject | associated production | |
dc.subject | multivariate analysis | |
dc.subject | TMVA | |
dc.subject.ddc | 530 Physik | |
dc.title | Search for the H → b¯b decay mode of the Standard Model Higgs boson in associated production with a vector boson in proton-proton collisions at √s = 8 TeV with the ATLAS experiment | |
dc.type | Dissertation oder Habilitation | |
dc.publisher.name | Universitäts- und Landesbibliothek Bonn | |
dc.publisher.location | Bonn | |
dc.rights.accessRights | openAccess | |
dc.identifier.urn | https://nbn-resolving.org/urn:nbn:de:hbz:5n-36319 | |
ulbbn.pubtype | Erstveröffentlichung | |
ulbbnediss.affiliation.name | Rheinische Friedrich-Wilhelms-Universität Bonn | |
ulbbnediss.affiliation.location | Bonn | |
ulbbnediss.thesis.level | Dissertation | |
ulbbnediss.dissID | 3631 | |
ulbbnediss.date.accepted | 14.03.2014 | |
ulbbnediss.institute | Mathematisch-Naturwissenschaftliche Fakultät : Fachgruppe Physik/Astronomie / Physikalisches Institut (PI) | |
ulbbnediss.fakultaet | Mathematisch-Naturwissenschaftliche Fakultät | |
dc.contributor.coReferee | Desch, Klaus |
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