E-Dissertationen: Search
Now showing items 11-20 of 48
Search for Supersymmetry in final states with jets, missing transverse momentum and at least one τ lepton with the ATLAS Experiment
(2013-07-12)
The first search for Supersymmetry (SUSY) in final states with at least one τ lepton, two or more jets and large missing transverse energy based on proton-proton collisions recorded with the ATLAS detector at the LHC is ......
Spin and Flavour dependent Interactions within a Quark Model for Baryons
(2013-06-14)
Within the framework of a relativistic covariant quark model the effects of two novel quark interactions on the light-flavoured baryon mass spectra as well as on a multitude of observables, such as electroweak form factors, ...
Matching the heterotic string on orbifolds and their resolutions
(2013-08-21)
We study the symmetry breaking mechanism under which a 6d orbifold compactification of the 10d heterotic string turns into a smooth Calabi--Yau compactification. This process is naturally required to preserve N=1 supersymmetry ...
Punktdefekte in Verbindungshalbleitern untersucht mit der gestörten Winkelkorrelation
(2013-05-29)
Die Dissertation befasst sich mit der Charakterisierung von dotierten Halbleitern, im Speziellen mit AlN, GaN, deren ternäres Verbindungssystem AlGaN und ZnO. Diese Halbleiter mit Wurtzitstruktur finden bereits eine breite ...
Extraction of Fragmentation Functions from Charged Kaon and Pion Production at COMPASS
(2013-12-16)
Quark helicity distributions can be accessed by measuring spin asymmetries in polarised deep-inelastic scattering, but for a full flavour separation the precise knowledge of quark fragmentation functions is essential. Those ...
Single atom interferometers and Bloch oscillations in quantum walks
(2013-05-22)
The deliberate coherent manipulation of a single atom's spin and position in an optical lattice has great potential as a primitive for future quantum simulators. This thesis investigates position control on ultracold Caesium ...
AFM-Untersuchungen auf Elektrodenoberflächen
(2013-07-10)
In der vorliegenden Arbeit wurde eine Analyse der Reibung an Elektroden in Elektrolyten durchgeführt. Dabei wurde das Verhalten der reibenden Körper bei unterschiedlicher Normalkraft und Krümmung (Rauhigkeit) des Kontaktes ...
Antisymmetrisation in a Jacobi coordinate based no-core shell model approach
(2013-06-13)
The theory of the strong interaction, Quantum Chromodynamics (QCD), provides the generally accepted description of strongly interacting processes. Due to the confinement of the fundamental degrees of freedom of QCD, the ...
Multivariate methods and the search for single top-quark production in association with a W boson in ATLAS
(2013-05-28)
This thesis describes three machine learning algorithms that can be used for physics analyses. The first is a density estimator that was derived from the Green’s function identity of the Laplace operator and is capable of ......
Numerical Renormalization Group Studies of the Partially Broken SU(3) Kondo Model
(2013-05-29)
The two-channel Kondo (2CK) effect with its exotic ground state properties has remained difficult to realize in physical systems. At low energies, a quantum impurity with orbital degree of freedom, like a proton bound in ...