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ATLAS Theses

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2025-05-05
23:10
Measurement of differential cross-sections of the $t\bar{t}\gamma$ process with the ATLAS detector / Mondal, Buddhadeb
This thesis presents a measurement of the differential cross-sections of the associated production of a top quark pair and a photon ($t\bar{t}\gamma$) in proton-proton collisions at a center-of-mass energy of 13 TeV [...]
CERN-THESIS-2024-377 - 2024 - 213.


10.25819/ubsi/10622

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2025-04-22
16:43
Constraining Charge-Parity symmetry violation in the interactions of the Higgs and W bosons / Rosalino, Beatriz
The violation of charge and parity symmetry (CP) must have occurred in the early universe to explain the discrepancy between the hypothesis that particles and anti-particles were produced in equal numbers in the Big Bang, and the observation that the universe today is matter-dominated [...]
CERN-THESIS-2025-036 - 2025 - 86.


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2025-04-22
11:39
Study of a Kinematic Fit algorithm for the HH→bbγγ channel reconstruction in the ATLAS experiment at the LHC / Orlandini, Romano
The tri-linear Higgs self coupling is a physical quantity which represents a source of particular interest in the modern research since it allows to study the Higgs potential directly and test the validity of the Standard Model [...]
CERN-THESIS-2023-439 - 2023 - 89.


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2025-04-21
17:20
Measurement of Multi-Jet Ratios in the ATLAS Experiment / Farazpay, Zahra
This dissertation presents a comprehensive study of multi-jet cross-section ratios using proton-proton collision data collected by the ATLAS detector during Run 2 of the Large Hadron Collider (LHC) at a center-of-mass energy of √ s = 13TeV [...]
CERN-THESIS-2024-375 - 2024 - 148.


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2025-04-16
16:29
Measurement of top quark pair production in association with charm quarks at $\sqrt{s}=13\,$TeV with the ATLAS detector / Kingston, Matthew Kevin
The Large Hadron Collider at CERN has produced a uniquely large set of proton-proton collision data at never-before-seen energies since the beginning of its operation in 2010 [...]
CERN-THESIS-2025-034 - 232.


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2025-04-15
09:13
Search for Higgs boson pair production in the two photons plus two bottom quarks final state using partial Run-3 proton-proton collision data with the ATLAS detector / Montereali, Federico
A search for the Standard Model (SM) Higgs boson pair production in the $b\bar{b}\gamma\gamma$ final state is presented, using data from Run-II (2015–2018, $\sqrt{s}=13$ TeV, 140 fb$^{-1}$) and partial Run-III (2022–2023, $\sqrt{s}=13.6$ TeV, 59 fb$^{-1}$) collected with the ATLAS detector at th [...]
CERN-THESIS-2025-031 - 2025 - 175.


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2025-03-31
06:16
Search for the decay of the Higgs boson to charm quarks in p-p collisions at $\sqrt{s} = 13$ TeV in the LHC-ATLAS experiment / Wickremasinghe, Lakmin
This thesis describes the latest search on the Higgs boson decay to a charm and anti-charm quark pair ($H \rightarrow c\bar{c}$), where the Higgs boson is produced in association with a vector boson [...]
CERN-THESIS-2025-025 - 2025 - 254.


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2025-03-27
16:50
Observation of four top quarks production and EFT interpretations in the multi-lepton final state with the ATLAS Experiment / Sindhu, Sreelakshmi
The Standard Model has been remarkably successful in describing fundamental particles and their interactions [...]
CERN-THESIS-2025-024 - 2024 - 164.


10.53846/goediss-11120

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2025-03-26
16:11
Searches for new physics in final states with multiple top quarks with the ATLAS detector and upgrade of the ATLAS tracking detector / Sitnikova, Elizaveta
The Standard Model's known limitations drive the search for new physics, a major focus of modern experimental particle physics [...]
CERN-THESIS-2025-021 - 2025 - 189.


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2025-03-24
17:50
Search for the decay of the Higgs boson to a Z boson and a long-lived axion-like particle decaying to two photons with the ATLAS Detector / Lamprinoudis, Georgios
The Standard Model of particle physics is one of the most successful theories, capable of describing a wide range of observed physical processes [...]
CERN-THESIS-2024-364 - 2025 - 169.


10.25358/openscience-11696

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