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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
Showing 1 to 10 of 25 (0.02 seconds)| 1 |
A search for the Standard Model Higgs boson via its decay to tau leptons and W bosons at the ATLAS detectorBoddy, Christopher January 2013 (has links)
Understanding the origin or Electroweak symmetry breaking within the Standard Model was a key motivation for the construction of the Large Hadron Collider (LHC) experiment at CERN. This thesis presents a search for evidence of Higgs boson production in the 4.7 fb−1 of collision data recorded at a centre-of-mass energy of 7 TeV at the ATLAS detector during 2011. This search is focused on signal events in which a Higgs boson is produced in the mass range 100 < mH < 180 GeV/c2 and subsequently decays to a pair of W bosons or a pair of tau leptons to final states with one hadronically decaying tau lepton and one light lepton. After an event selection criteria has been applied, the number of events in this data sample is consistent with the total background estimate and an upper limit is placed on the SM Higgs boson production rate at 95% confidence level. In addition, the prospects for measuring the SM Higgs coupling strength to tau leptons with the associated Higgs production channels and the full LHC dataset are also presented.
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Lead tungstate crystal electromagnetic calorimeter in CMS at the large Hadron collider and consequences for physics performanceGraham, Douglas Jonathan January 1998 (has links)
No description available.
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Evaluation of the LHCb RICH detectors and a measurement of the CKM angle #gamma#Rademacker, Jonas January 2001 (has links)
No description available.
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Search for neutral Higgs bosons decaying into the leptonic-hadronic di-tau final state in the Minimal Supersymmetric Standard Model with the ATLAS detectorFriedrich, Felix 27 October 2017 (has links)
A search for the neutral Higgs bosons predicted by the Minimal Supersymmetric Standard Model (MSSM) is presented. The analysis is performed on data from proton-proton collisions at a centre-of-mass energy of sqrt{s}=8 TeV at the Large Hadron Collider recorded by the ATLAS detector. The data were collected in 2012, correspond to an integrated luminosity of 20.3 fb-1 and represent the full 8 TeV dataset. This search is performed in the tau-tau final state, with one tau lepton decaying leptonically and the other hadronically. The analysis is optimized in three categories, addressing low-mass Higgs bosons which are accompanied by a bottom quark induced jet or not and high-mass Higgs bosons. No deviations from Standard Model predictions are observed, and therefore no evidences of new Higgs bosons are found. Exclusion limits are set on the cross-section times branching fraction of the Higgs bosons and for parameters m_A and tan{beta} of MSSM benchmark scenarios. / In dieser Arbeit wird die Suche nach neutralen Higgs-Bosonen im Rahmen des Minimalen Supersymmetrischen Standardmodells (MSSM) vorgestellt. Die Analyse basiert auf dem kompletten Datensatz von Proton-Proton-Kollisionen des Large Hadron Colliders, LHC, die mit dem ATLAS-Detektor bei einer Schwerpunktsenergie von sqrt{s}=8 TeV im Jahr 2012 aufgenommen wurden. Die Daten entsprechen einer Luminosität 20.3 fb-1. Die Suche fokussiert auf den Tau-Tau Endzustand, wobei ein Tau-Lepton hadronisch zerfällt und das andere leptonisch, entweder in ein Elektron oder in ein Muon. Die Analyse wurde in drei Kategorien optimiert, um sowohl für Higgs-Bosonen im niedrigen Massenbereich von 90-200 GeV als auch im hohen Massenbereich von 200 GeV bis 1 TeV sensitiv zu sein. Der niedrige Massenbereich wurde dabei in zwei Unterkategorien geteilt, entsprechend der Anwesenheit bzw. Abwesenheit von zusätzlichen, durch b-Quarks induzierten Jets, um die Empfindlichkeit für spezielle Higgs-Boson-Produktionsmodi zu erhöhen. Im Rahmen dieser Analyse wurden keine Hinweise auf neue Higgs-Bosonen gefunden und daher Ausschlussgrenzen auf den Wirkungsquerschnitt x Verzweigungsverhältnis gesetzt. Ebenfalls wurden die Resultate in MSSM-Benchmark-Szenarien interpretiert.
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Studies of the electromagnetic calorimeter and direct photon production at the CMS detectorReid, Elspeth Catriona January 1999 (has links)
No description available.
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The IEEE 1355 Standard : developments, performance and application in high energy physicsHaas, Stefan January 1998 (has links)
No description available.
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Semiconductor detectors for the inner tracker of the ATLAS experiment at CERNMorgan, Debbie January 1998 (has links)
No description available.
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Analogue readout and signal processing for micro strip gas chambers of the compact muon solenoid at LHCSciacca, Francesco G. P. January 1999 (has links)
No description available.
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b quark tagging performance and Higgs detection via top production using the ATLAS detectorPickford, Andrew Norman January 2001 (has links)
No description available.
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Detector development for ATLAS and supersymmetry physics studiesGrewal, Anishinder Singh January 1999 (has links)
No description available.
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