The identification of high transverse momentum top quarks is an essential ingredient of many searches for new physics. This thesis presents, for the first time, the performance of shower deconstruction, a new top-tagging algorithm, using data collected with the ATLAS detector at…
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In this work we examine the dynamics of one-dimensional systems. We present a continuum approach to the construction of the non-equilibrium Keldysh functional integral and derive a relation between the classical and quantum fields of the Keldysh formalism and the occupation of a…
Turbulent transport in magnetized plasmas is one of the fundamental issues in fusion plasma physics. It is recognized that the interactions between zonal flows(ZFs) and micro-scale drift wave turbulence can influence plasma transport in both Tokamaks and Stellarators. These inte…
The basic building blocks of all biomembranes are lipid molecules, which self-assemble to form a very thin and stable barrier, where a variety of proteins can be incorporated into its structure. These two-dimensional systems exhibit a plethora of physical phenomena, which are an…
A search was performed for the Λ\(_b\)\(^0\)→Λ\(^0\)η’ and Λ\(_b\)\(^0\)→Λ\(^0\)η decays with the LHCb experiment. The full dataset recorded by LHCb in 2011 and 2012 is used, corresponding to 1.0fb\(^-\)\(^1\) of proton-proton collision data collected at a centre of mass energy …
Modern electron microscopes are fitted with ever larger charge-coupled device (CCD) cameras capable of faster acquisition rates which in turn drives a concomitant increase in the bandwidth of data that is being collected and the amount of information in our datasets. At the same…
Spectral-domain optical coherence tomography (SD-OCT) is a type of non-destructive imaging technique that is capable of resolving the inner structure of a sample with micrometre spatial resolution. SD-OCT is based on low coherence interferometry. It utilises a spectrometer to gr…
Iris biometrics is widely regarded as a reliable and accurate method for personal identification and the continuing advancements in the field have resulted in the technology being widely adopted in recent years and implemented in many different scenarios. Current typical iris bi…
This thesis presents a measurement of the cross-section for the produc- tion of a Higgs boson in association with a W boson. Where the Higgs boson decays to a pair of b-quarks and the W boson decays leptonically to a electron-neutrino pair or muon-neutrino pair. The measurements…
In this thesis a measurement of the total decay width of the top quark, Г\(_{top}\) is presented using selected semi-leptonic \({t¯t}\) event candidates, recorded from protonproton collisions at a centre-of-mass energy of \(\sqrt{s}\) = 8 TeV with the ATLAS experiment at CERN in…
Magnetic Resonance Spectroscopic Imaging (MRSI) is a functional MRI technique allowing non-invasive biochemical mapping of the brain. MRSI is advantageous for characterising many neurological conditions; however, its clinical application is limited by lengthy scan time and low s…
Segregation to crystalline interfaces has been considered in terms of its effect on the thermodynamic interfacial energies. The experimental evidence for segregation was reviewed and its effects on interfacial energies and mechanical properties discussed with particular referenc…
The Large Hadron Collider (LHC) is a proton-proton collider that has achieved a world high centre of mass energy. The protons are collided at four distinct detectors. One such is the ATLAS, a large general purpose detector aimed at a multitude of physics analyses. At the start o…
ALPHA is one of the experiments at CERN's Antiproton Decelerator dedicated for antihydrogen studies. A unique Silicon Vertex Detector (SVD) has been designed and built to surround the ALPHA neutral atom trap, its principle purpose to monitor the experiment. The SVD is main diagn…
This thesis concerns molecules with potential uses for information storage on the atomic scale. Density functional theory (DFT) calculations are used to study the molecules in depth, to further understand their properties and to ascertain whether they are suited to such applicat…
High spin states in 156Ho have been populated through the 124Sn( 37 Cl, 5n)156Ho reaction at 177MeV as part of an experiment performed at the ATLAS facility of Argonne National Laboratory. A high statistics, high-fold γ-ray coincidence data set was collected with the GAMMASPHERE…
This thesis describes the search for new heavy neutral gauge bosons decaying into di-electron pairs, focussing on the Z′SSM boson described by the Sequential Standard Model. The analysis uses 20.3fb−1 of pp collisions at √s = 8TeV recorded with the ATLAS detector during the 2012…
The development of the plastic electronics industry has drawn great interest and inspired technology innovations in a broad area. This has stimulated the rapid development of flexible circuitry manufacturing technologies, including advances in conductive inks, printing technolog…
Fusion-evaporation reactions have been used to populate excited states in 173Au and 173Pt, and expand the level schemes for these nuclei. Transitions feeding the π −1 (s1/2) state in 173Au have been discovered for the first time. No collective behaviour was observed in 173Au eit…