E-Dissertationen: Browsing E-Dissertationen by Author "Hammer, Hans-Werner"
Now showing items 1-14 of 14
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Antisymmetrisation in a Jacobi coordinate based no-core shell model approach
Liebig, Susanna (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 ... -
Breitbandige Feedback-Systeme zur Dämpfung kohärenter Strahlinstabilitäten am Stretcherring ELSA
Roth, André (2013-01-09)Für zukünftige Hadronenphysik-Experimente an der Bonner Elektronen-Stretcher-Anlage ELSA wird eine Erhöhung der Intensität des extrahierten Elektronenstrahls angestrebt. Die dazu im ELSA Stretcherring erforderliche Speicherung ... -
Dispersion-theoretical analysis of the nucleon electromagnetic form factors
Belushkin, Maxim (2007)The structure of the proton and the neutron is of fundamental importance for the study of the strong interaction dynamics over a wide range of momentum transfers. The nucleon form factors encode information on the internal ... -
Effective Field Theory for Halo Nuclei
Hagen, Philipp Robert (2014-03-07)We investigate properties of two- and three-body halo systems using effective field theory. If the two-particle scattering length <i>a</i> in such a system is large compared to the typical range of the interaction <i>R</i>, ... -
Effective quantum theories with short- and long-range forces
König, Sebastian (2013-10-28)At low energies, nonrelativistic quantum systems are essentially governed by their wave functions at large distances. For this reason, it is possible to describe a wide range of phenomena with short- or even finite-range ... -
Efimov Effect in Pionless Effective Field Theory and its Application to Hadronic Molecules
Wilbring, Erik (2016-02-12)In the past years various new hadronic states were discovered in the charm and bottom meson sector by experiments like Belle, BES and Babar. Many of these states fit into the conventional charmonium or bottomonium spectrum, ... -
Few-body physics in a Finite Volume
Kreuzer, Simon (2010-11-03)In this work, three-body bound states were studied in finite volume using an Effective Field Theory framework. The finite volumes under consideration are cubic volumes with periodic boundary conditions. The Effective Field ... -
Few-Body Physics in Quantum Gases
Helfrich, Kerstin (2011-10-25)Few-body effects play an important role for the understanding of ultracold quantum gases. We make use of an effective field theory approach to investigate various aspects of universal few-body physics close to a Feshbach ... -
Few-Body Systems in a Shell-Model Approach
Tölle, Simon (2014-03-14)In this thesis, I introduce and compare an implementation of two different shell models for physical systems consisting of multiple identical bosons. <br /> In the main part, the shell model is used to study the energy ... -
Inferring complex networks from time series of dynamical systems: Pitfalls, misinterpretations, and possible solutions
Bialonski, Stephan (2012-07-26)Understanding the dynamics of spatially extended systems represents a challenge in diverse scientific disciplines, ranging from physics and mathematics to the earth and climate sciences or the neurosciences. This challenge ... -
Low-energy scattering on the lattice
Bour Bour, Shahin (2014-06-24)In this thesis we present precision benchmark calculations for two-component fermions in the unitarity limit using an ab initio method, namely Hamiltonian lattice formalism. We calculate the ground state energy for unpolarized ... -
Neutral Pion Electroproduction off Light Nuclei in Chiral Perturbation Theory
Lenkewitz, Mark (2013-12-12)Threshold pion electroproduction on tri-nucleon systems is investigated in the framework of baryon Chiral Perturbation Theory (ChPT) at next-to-leading one-loop order O(q<sup>4</sup>) in the chiral expansion. To this order ... -
Precision calculations for the low-energy dynamics of pions and nucleons
Hoferichter, Martin (2012-07-18)QCD is strongly coupled at long distances and therefore non-perturbative methods are required to understand its low-energy properties, e.g. to answer such basic questions as of the origin of the nucleon mass. In this thesis ... -
Three-Body Halo Nuclei in an Effective Theory Framework
Canham, David L. (2009-07-02)The universal properties and structure of halo nuclei composed of two neutrons (<i>2n</i>) and a core are investigated within an effective quantum mechanics framework. We construct an effective interaction potential that ...