Mathematisch-Naturwissenschaftliche Fakultät: Suche
Anzeige der Dokumente 11-20 von 61
From galaxies to the cosmic web and back: the interplay of different scales in galaxy formation and cosmic reionization
(2020-10-08)
The evolution of the Universe is primarily governed by gravity, that triggers the development of a complex web-like distribution of galaxies. The latter are embedded in larger structures, called haloes, mainly composed by ...
Accumulation and Clearing of Ions in Circular Electron Accelerators
(2020-09-02)
Modern sychrotron light sources have to provide stable storage for electron beams with high charge densities to make brilliant synchrotron radiation available to users. Since requirements on the brilliance of the radiation ...
From star formation to regional distribution: Influences on the embedded cluster mass function
(2021-07-02)
In this work we study the embedded cluster mass function (ECMF), meaning the mass distribution
function of embedded clusters. Embedded clusters are fully or partially enclosed in interstellar gas,
dust and molecular ...
Three Pion Scattering at Maximal Isospin from Lattice QCD at Physical Mass
(2021-01-07)
In this work the scattering of two pions in $I = 2$ and three pions in $I = 3$ is analyzed with lattice QCD. The process is computed on three Wilson clover twisted mass ensembles generated by the ETMC with total momentum ...
Messung von Polarisationsobservablen in der 2π0-Photoproduktion mit dem Crystal-Barrel/TAPS-Experiment
(2021-03-17)
Die Theorie der starken Wechselwirkung ist im Energiebereich ihrer Bindungszustände, der Mesonen und Baryonen, nicht störungstheoretisch behandelbar. Durch die Untersuchung des Anregungsspektrums der Baryonen kann ein ......
Measurements of q2 moments of inclusive B → Xcℓν decays toward an alternative determination of |Vcb|
(2021-12-06)
This thesis presents the first measurement of the first to the fourth moments of the four-momentum transfer squared q2 spectrum for inclusive B → Xcℓν decays, where ℓ = e, μ. The determination of these ......
The structure of massive star-forming clumps
(2021-11-25)
Among many other critical questions in astrophysics, the high-mass star formation process is a matter of heated debate; so far a comprehensive understanding is lacking. Star formation takes place in cold molecular clouds. ...
Quantum Simulation of the Bilayer Hubbard Model Using Ultracold Atoms
(2021-09-15)
In this thesis, experiments performed in a quantum simulator for the two-dimensional and an extended Hubbard model are presented. The lowest two hyperfine states of fermionic potassium atoms are used to realise the model’s ...
Testing models of galaxy formation and evolution with galaxy-galaxy-galaxy lensing
(2021-03-29)
Explaining the formation and evolution of galaxies is a fundamental issue in modern astronomy. Several competing models try to explain how galaxies form and predict the relationship between galaxies and dark matter. A ...
Quantum simulation of strongly-correlated two-dimensional fermions in optical lattices
(2020-05-12)
In this thesis, I present the experimental realisation of the two-dimensional Hubbard model with ultracold fermionic Potassium-40 atoms in optical lattices. By tuning the dimensionality, kinetic and interaction in the ...