Browsing Fakultät für Physik (inkl. GAUSS) by Advisor "Quadt, Arnulf Prof. Dr."
Now showing items 1-20 of 41
-
A Top Quark Mass Measurement Using the R32 Stabilized Variable with the ATLAS Detector
(2012-08-31)This thesis presents one of the first measurements of the top quark mass at the ATLAS experiment, one of the four large experiments located along the LHC. First discovered in 1995 at the Tevatron experiments CDF and D0, ... -
Calibration of the ATLAS B-tagger and the search for the $t\overline{t}H(H\rightarrow b\overline{b})$ process at $\sqrt{s}$ = 13 TeV with the ATLAS experiment at the LHC
(2019-04-24)Top quarks and Higgs bosons are the heaviest particles in the Standard Model of particle physics and are the subject of many analyses performed with the ATLAS experiment at the LHC at CERN. The Higgs boson was discovered ... -
Cross-section measurements of top-quark pair production in association with a hard photon at 13 TeV with the ATLAS detector
(2020-08-25)25 years after the top quark's discovery, the Large Hadron Collider at CERN produces proton-proton collision data on unprecedented scales at unprecedented energies – and has heralded an era of top-quark precision measurements. ... -
Data intensive ATLAS workflows in the Cloud
(2018-06-06)Large physics experiments, such as ATLAS, have participating physicists and institutes all over the Globe. Nowadays, physics analyses are performed on data that is stored thousands of kilometres away. This is possible due ... -
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 ... -
Development of Pixel Module Assembly Processes for the Phase 2 Upgrade of the ATLAS Detector and Test Beam Measurements with Diamond Pixel Detectors
(2020-02-25)One of the most powerful machines to study particle physics is the Large Hadron Collider (LHC). Starting in 2024, it will be upgraded to the High Luminosity-LHC (HL-LHC) to deliver even more data to measure with high ... -
Development of the detector readout for the ATLAS Phase II ITk pixel detector
(2025-01-23)During the HL-LHC upgrade, a high luminosity upgrade takes place, where the instantaneous luminosity will reach 7.5 × 10^(34) cm^(−2)s^(−1) in Run 4. The current inner detector of the ATLAS experiment will be replaced by ... -
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, ... -
Direct measurement of the top-quark decay width with the ATLAS detector
(2019-07-10)The top quark is the heaviest known elementary particle. Due to its large mass, the top quark decays before it forms bound states. This makes the top quark a unique particle in the Standard Model. Precise measurements of ... -
Direct Top Quark Decay Width Measurement in the tt Lepton+Jets Channel at 8 TeV with the ATLAS Experiment
(2017-11-09)The top quark t plays an essential role in the field of elementary particle physics - in particular due to its exceptional properties comprising a large mass, which approximately equals the mass of a tungsten atom, and an ... -
Fiducial cross-section measurements of the production of a prompt photon in association with a top-quark pair at $\sqrt{s}=13$ TeV with the ATLAS detector at the LHC
(2018-11-23)The cross sections for top-quark pair production in association with a photon are measured in a fiducial volume with the ATLAS detector at a centre-of-mass energy of 13 TeV. Results are presented using proton-proton collision ... -
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 ... -
Legacy cross-section measurements of the $t\bar{t}Z$ production process in the trileptonic final state at $\sqrt{s}=13\,$TeV with the ATLAS detector
(2024-01-31)After three years of data-taking during the second run of the LHC at CERN, Geneva, Switzerland, the ATLAS detector has recorded its most extensive proton-proton collision data set to date, allowing for a wide range of ... -
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 ... -
Measurement of the $W$ Boson Polarisation in $t\bar{t}$ Dilepton Events at $\sqrt{s}=8$ TeV with the ATLAS Detector
(2019-10-18)A measurement of the $W$ boson polarisation in top quark decays is presented. The top anti-top pairs were produced at a centre of mass energy of $\sqrt{s}=8$ \tev \ using proton-proton collisions at the LHC. The data sample ... -
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 ... -
Measurement of the charge asymmetry in top quark pair production in in pp collision data at √s = 7 TeV using the ATLAS detector
(2012-03-22)A measurement of the charge asymmetry in the production of top quark pairs in the semileptonic decay channel has been performed. A dataset corresponding to an integrated luminosity of 1.04 fb-1, btained at a centre-of-mass ... -
Measurement of the Higgs Boson Production Cross Section in Hadronic Final States in 13 TeV Proton-Proton Collisions with the ATLAS Detector
(2019-01-04)The couplings of the Standard Model Higgs boson to fermions provide valuable insights into the nature of electroweak symmetry breaking in the Yukawa sector. This thesis summarises the measurement of the Higgs boson ... -
Measurement of the Higgs boson production in the H → ττ → τlepτhad decay channel at √s = 13 TeV with the ATLAS detector at the LHC
(2019-06-14)This thesis presents a measurement of the Standard Model Higgs boson production in the H → ττ decay with particular emphasis on the final state in which one tau decays hadronically and the other one decays leptonically, ... -
Measurement of the inclusive <i>tγ</i> cross section at √<i>s</i> = 7 TeV with the ATLAS detector
(2012-06-12)A first measurement of the ttγ cross section in pp collisions at the LHC using 1.04 fb-1 of data taken with the ATLAS detector is presented. A total of 122 candidate events were identified in the single electron and single ...