Browsing Naturwissenschaften, Mathematik und Informatik by Referee "Quadt, Arnulf Prof. Dr."
Now showing items 21-40 of 46
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Search for the Standard Model Higgs boson produced in association with a pair of top quarks and decaying into a bb-pair in the single lepton channel at √s = 13 TeV with the ATLAS experiment at the LHC
(2017-07-05)This thesis presents a search for Standard Model Higgs boson produced in association with top quark pairs, ttH. The analysis uses 13.2 fb-1 of pp collision data at √s = 13 TeV collected in 2015 and 2016 ... -
Measurement of the W Boson Helicity Fractions in Top/anit-Top Events at 8 TeV in the Lepton + Jets Channel with the ATLAS Detector
(2017-04-28)Precise measurements of the properties of the top quark allow for testing the Standard Model (SM) and can be used to constrain new physics models. The top quark is predicted in the SM to decay almost exclusively to a W ... -
Aspects of QCD uncertainties and fast QCD predictions for high-energy collider experiments
(2016-12-20)We address the issue of how to provide accurate perturbative QCD predictions along with their theory uncertainties in a systematic and fast way using Monte-Carlo event generators, considering that state-of-the-art calculations ... -
HappyFace as a monitoring tool for the ATLAS experiment
(2016-10-24)The importance of monitoring on HEP grid computing systems is growing due to a significant increase in their complexity. Computer scientists and administrators have been studying and building effective ways to gather ... -
Detector Development for the High Luminosity Large Hadron Collider
(2016-08-18)To maximise the discovery potential of the Large Hadron Collider, it will be upgraded to the High Luminosity Large Hadron Collider in 2024. New detector challenges arise from the higher instantaneous luminosity and the ... -
Search for the Standard Model Higgs boson produced in association with a pair of top quarks and decaying into a bb-pair in the single lepton channel at sqrt{s} = 8 TeV with the ATLAS experiment at the LHC
(2016-08-18)This thesis focuses on the search for the Standard Model Higgs boson produced in association with a pair of top quarks, ttH, using 20.3 fb-1 of pp collision data at sqrt{s} = 8 TeV, collected with the ATLAS detector at the ... -
Monitoring and Optimization of ATLAS Tier 2 Center GoeGrid
(2016-02-26)The demand on computational and storage resources is growing along with the amount of infor- mation that needs to be processed and preserved. In order to ease the provisioning of the digital services to the growing number ... -
Radiation Hard 3D Diamond Sensors for Vertex Detectors at HL-LHC
(2016-02-12)Diamond is a good candidate to replace silicon as sensor material in the innermost layer of a tracking detector at HL-LHC, due to its high radiation tolerance. After particle fluences of $10^{16}\,{\rm protons/cm^2}$, ... -
Search for the Standard Model Higgs boson produced in association with tt and decaying into bb at 8 TeV with the ATLAS detector using the Matrix Element Method
(2015-11-02)A search for the Standard Model Higgs boson produced in association with a pair of top quarks (ttH) is presented. The analysis uses 20.3 fb−1 of pp collision data at √s = 8 TeV, collected with the ATLAS detector at the ... -
Search for Supersymmetry in Trilepton Final States with the DØ Experiment
(2015-10-27)A search for supersymmetry in the trilepton final state is performed using the full dataset of the DØ experiment. The analyzed data amounts to an integrated luminosity of ∫ℒ = 9.7 fb⁻¹ of pp̅ collisions, produced at √s ... -
Measurement of the associated production of a vector boson (W, Z) and top quark pair in the opposite sign dilepton channel with pp collisions at √s = 8 TeV with the ATLAS detector
(2015-01-08)The heaviest known elementary particle predicted by the Standard Model (SM), the top quark, was discovered in 1995 by the CDF and D0 collaborations. The large top quark mass translates into a coupling to the Higgs boson ... -
Development and validation of a model for the response of the Belle II vertex detector
(2014-11-06)The future super flavour factory SuperKEKB with its detector system Belle II offers precision physics measurements to test the Standard Model or probe undiscovered phenomena. The physics goals of Belle II require a very ... -
Monitoring Radiation Damage in the ATLAS Pixel Detector
(2014-11-05)Radiation hardness is one of the most important features of the ATLAS pixel detector in order to ensure a good performance and a long lifetime. Monitoring of radiation damage is crucial in order to assess and predict the ... -
Measurement of Spin Correlations in Top/Anti-Top Events from pp Collisions at sqrt(s) = 7 TeV in the Lepton+Jets Final State with the ATLAS Detector
(2014-09-25)The top quark decays before it hadronises. Before its spin state can be changed in a process of strong interaction, it is directly transferred to the top quark decay products. The top quark spin can be deduced by studying ... -
Testbeam Measurements with Pixel Sensors for the ATLAS Insertable b-Layer Project
(2014-07-04)During the current long machine shutdown of the Large Hadron Collider (LHC) at CERN (Geneva), the innermost part of the ATLAS experiment, the pixel detector, is upgraded. The existing ATLAS pixel system is equipped with ... -
Measurement of the W-boson Polarisation in Top-Quark Decays with the ATLAS Detector
(2013-09-20)A measurement of the W-boson polarisation in top-quark decays is presented. The top-antitop events were produced in proton-proton collisions at a centre-of-mass energy of sqrt{s} = 7 TeV at the LHC. The data set corresponds ... -
Physics with Jets in Association with a Z Boson in pp-collisions with the ATLAS Detector at the Large Hadron Collider
(2013-09-16)This thesis presents the measurements of the production cross section of jets in association with a Z boson in pp-collisions at √s = 7 TeV with an integrated luminosity of ∫Ldt = 36 pb−1 and ∫Ldt = 4.6 fb−1 recorded ... -
Search for Supersymmetry in Final States with Leptons with the ATLAS Detector at the Large Hadron Collider
(2013-07-17)After a short review of the Standard Model of Elementary Particle Physics and its minimal supersymmetric extension, the MSSM, a global analysis of two highly simplified supersymmetric models, the CMSSM and the NUHM1 is ... -
Assessing and Improving Interoperability of Distributed Systems
(2013-02-12)Achieving interoperability of distributed systems offers means for the development of new and innovative business solutions. Interoperability allows the combination of existing services provided on different systems, into ... -
Development of the readout for the IBL Upgrade Project of the ATLAS Pixel Detector
(2012-12-05)The LHC luminosity is upgraded in several phases until 2022. The resulting higher occupancy degrades the detector performance of the current Pixel Detector. To provide a good performance during the LHC luminosity upgrade, ...