E-Dissertationen: Suche
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Quark-mass dependence of pion scattering amplitudes
(2022-07-11)
We analyze lattice-QCD data of the ππ → ππ P wave obtained at unphysical-high pion masses with the inverse-amplitude method at next-to-leading order and at next-to-next-to-leading order. We then extrapolate to the ...
Efficient sub-Doppler Transverse Laser Cooling of an Indium Atomic Beam
(2009-09-10)
Laser cooled atomic gases and atomic beams are widely studied samples in experimental research in atomic and optical physics. For the application of ultra cold gases as model systems for e.g. quantum many particle systems, ...
Puls NMR mit hyperpolarisierten Protonen in Metallen
(2004)
Protonen Puls NMR ist als vielseitige Methode in der Festkörperphysik, Chemie, Biologie und Medizin etabliert. Um das elektromagnetische Signal eines freien Induktionszerfalls (FID) zu detektieren, werden bei der NMR ca. ...
Search for top-quark-pair associated Higgs production with tau leptons using the ATLAS detector at the LHC
(2019-03-20)
The search for Higgs boson production in association with a pair of top quarks in multilepton final states is presented. Seven final states defined by the number and flavour of charged leptons are analysed in the data set ......
Entstehungsdynamik und Phaseneigenschaften von Weißlicht-Superkontinua aus gezogenen Glasfasern
(2008)
In dieser Arbeit werden Resultate aus Untersuchungen zur Entstehungsdynamik von breitbandigen Lichtkontinua aus nichtlinearen Glasfasern vorgestellt. Die Fasern werden durch die Verjüngung eines Stücks einer herkömmlichen ...
Pulsar Scintillation and Interstellar Lenses
(2024-01-29)
The radio emission of pulsars is scattered within the interstellar medium due to variations of the electron column density. Pulsars are very compact sources of pulsed radiation and, thus, emit spatially coherent radiation ...
High-energy processes in low-mass protostars – an X-ray to radio multi-wavelength perspective
(2007)
High-energy processes in protostars remain poorly understood. Only after the recently finished Chandra Orion Ultra-deep Project (COUP), statistically significant information on X-ray emission from Young Stellar Objects ...
The decay of the γp system into the pπ0η final state
(2004)
Photoproduction of mesons provides an excellent tool for accessing properties of baryon resonances. Most existing data sets on baryon resonances have been measured in \pi N scattering experiments; photoproduction experiments ...
From meson-baryon scattering to meson photoproduction
(2013-01-17)
In the present work we investigate the properties of the lowest baryon resonances. The starting point of our analyses is the low-energy effective theory of quantum chromodynamics, called chiral perturbation theory. As such ......
Entwicklung, Aufbau und Test eines neuen Auslesesystems für den Crystal-Barrel-Detektor zur Messung photoinduzierter Reaktionen an ELSA
(2000)
Nachdem Ende 1996 das Crystal-Barrel-Experiment am LEAR eingestellt wurde, begannen die Arbeiten zum Neuaufbau in Bonn. Dort sind im Rahmen des CB-ELSA-Experiments Messungen zur Photo- und Elektroproduktion am Proton und ...
