Ph.D. Theses

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2018-04-19
14:12
OpenAccess [PUBDB-2018-01793] Book/Dissertation / PhD Thesis
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Beyond the SM searches at the LHC: Little Higgs models and Effective Field Theory
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS, 117 pp. (2018) [10.3204/PUBDB-2018-01793] = Dissertation, Universität Hamburg, 2018  GO
In this thesis, we discuss two different approaches to physics beyond the Standard Model.First, we study a model-independent Effective Field Theory formalism. In particular, wefocus on bosonic CP-even six-dimensional operators. [...]
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2018-04-03
12:31
OpenAccess [PUBDB-2018-01615] Book/Report/Dissertation / PhD Thesis

On magnesium-containing implants for bone applications
[I-20130475 EC]
372 pp. (2016) [10.3204/PUBDB-2018-01615] = Dissertation, Malmö University, 2016  GO
The biomedical technologies for bone application are employed in millions of patients every year to restore function and aesthetics following trauma, diseases and congenital deformities. They achieved significant advancements in the last decades and have resulted in the development of implants that function for long periods of time. [...]
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2018-03-12
12:35
OpenAccess [PUBDB-2018-01450] Dissertation / PhD Thesis

Non-perturbative investigation of current correlators in twisted mass lattice QCD
Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 209 pp. (2013) [10.18452/16770] = Dissertation, Humboldt-Universität zu Berlin, 2013  GO
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2018-03-12
12:28
OpenAccess [PUBDB-2018-01449] Dissertation / PhD Thesis
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Chiral description and physical limit of pseudoscalar decay constants with four dynamical quarks and applicability of quasi-Monte Carlo for lattice systems
Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 107 pp. (2014) [10.18452/17244] = Dissertation, Humboldt-Universität zu Berlin, 2014  GO
In dieser Arbeit werden Massen und Zerfallskonstanten von pseudoskalaren Mesonen, insbes. dem Pion und dem D-s-Meson, im Rahmen der Quantenchromodynamik (QCD) berechnet [...]
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2018-03-12
11:18
OpenAccess [PUBDB-2018-01447] Dissertation / PhD Thesis
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Investigations of chiral symmetry breaking and topological aspects of lattice QCD
Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 198 pp. (2013) [10.18452/16890] = Dissertation, Humboldt-Universität zu Berlin, 2013  GO
Die spontane Brechung der chiralen Symmetrie ist ein faszinierendes Phenomän der QCD mit fundamentalen phänomenologischen Implikationen. Die Brechung der chiral Symmetrie ist beispielsweise verantwortlich für die niedrige Masse der Pionen, welche die effektiven Goldstone Boson der spontan gebrochene Symmetrie sind [...]
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2018-03-06
14:12
OpenAccess [PUBDB-2018-01381] Book/Report/Dissertation / PhD Thesis
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Acceleration of laser-injected electron beams in an electron-beam driven plasma wakefield accelerator
[DESY-THESIS-2018-006]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY THESIS, 135 pp. (2018) [10.3204/PUBDB-2018-01381] = Dissertation, Universität Hamburg, 2018  GO
Plasma wakefields deliver accelerating fields that are approximately a 100 times higher thanthose in conventional radiofrequency or even superconducting radiofrequency cavities. Thisopens a transformative path towards novel, compact and potentially ubiquitous accelerators.These prospects, and the increasing demand for electron accelerator beamtime for various applicationsin natural, material and life sciences, motivate the research and development on novelplasma-based accelerator concepts. [...]
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2018-03-05
17:41
OpenAccess [PUBDB-2018-01379] Dissertation / PhD Thesis
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Design Study for Generating Sub-femtosecond to Femtosecond Electron Bunches for Advanced Accelerator Development at SINBAD
171 pp. (2017) [10.3204/PUBDB-2018-01379] = Dissertation, University of Hamburg, 2017  GO
The SINBAD (Short INnovative Bunches and Accelerators at DESY) project is adedicated, long-term accelerator research and development (R&D) facility currentlyunder construction at the DESY Hamburg campus, aiming to provide an infrastructurefor developing several types of novel high-gradient accelerators. The research presented in this thesis addresses the design of the magnetic lattice as well as the modeling and simulations of ultra-short electron bunch generation at the ARES (Accelerator Research Experiment at SINBAD) linac, which is the core of the SINBAD facility. [...]
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2018-02-20
15:01
OpenAccess [PUBDB-2018-01266] Book/Report/Dissertation / PhD Thesis
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Measurement of $Z$-boson production cross sections at √s = 13 TeV and $t\bar{t}$ to $Z$-boson cross-section ratios with the ATLAS detector at the LHC
[DESY-THESIS-2018-004]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS, 196 pp. (2018) [10.3204/PUBDB-2018-01266] = Dissertation, Universität Hamburg, 2018  GO
The measurement of $Z$-boson production cross sections in $pp$ collisions at centre-of-mass energy of √s = 13 TeV is presented. Results are based on data corresponding to an integrated luminosity of 3.16 fb$^{-1}$ recorded with the ATLAS detector in 2015 at the LHC operating with the 25 ns bunch spacing configuration. [...]
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2018-02-13
14:50
OpenAccess [PUBDB-2018-01172] Dissertation / PhD Thesis
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Measurement of the fiducial differential Higgs cross-section with respect to pT using the diphoton decay channel atps = 8TeV with ATLAS
191 pp. (2018) [10.3204/PUBDB-2018-01172] = Dissertation, University of Hamburg, 2017  GO
AbstractThis thesis presents a measurement of the fiducial differential cross-section with respect to pT of Higgs boson production, using the diphoton decay channel. Theanalysis uses 20:3 fb-1 of proton-proton collision data at a centre-of-mass energy of 8TeV taken with the ATLAS detector in the year 2012. [...]
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2018-02-07
16:03
OpenAccess [PUBDB-2018-01119] Book/Report/Dissertation / PhD Thesis
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Stability and Performance Studies of the PITZ Photoelectron Gun
[DESY-THESIS-2018-003]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS, 163 pp. (2018) [10.3204/PUBDB-2018-01119] = Dissertation, Universität Hamburg, 2017  GO
The invention of free electron lasers (FELs) opened new opportunities for the investigation of natural phenomena. However, the operation of a FEL requires high energy, high peak current electron beams with very small transverse emittance which causes extreme requirements for the corresponding electron sources. [...]
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