Books

This thesis presents a search for supersymmetry using 138 fb−1 of proton-proton collisionat center-of-mass energy of √s = 13 TeV. The data was collected by the CMS detectorat the LHC at CERN in 2016–2018. [...]

In High-Energy Physics, detailed and time-consuming simulations are neededto describe particle showers in calorimeters. These particle showers arerecorded as energy deposits (hits) in the cells of the detector. [...]

This thesis addresses key challenges in modern particle physics by contributing to threecritical areas: the development of particle detectors, their calibration and the analysis ofdata collected in particle physics experiments. Contributions to these areas are presentedin the context of the Compact Muon Solenoid (CMS) experiment at the Large HadronCollider (LHC).The first part of this work focuses on the development and characterization of a temperaturetest system (Burn-in) for silicon modules, essential components of the CMS OuterTracker Upgrade, a central part of the preparation of CMS for the forthcoming High LuminosityLHC running [...]

The development of ultra-low emittance storage rings, such as the e+/e- Future CircularCollider (FCC-ee) with a circumference of about 90 km, aims to achieve unprecedentedluminosity and beam size. One significant challenge is correcting the optics, which becomesincreasingly difficult as we target lower emittances [...]

Nach ihrer Erschaffung genießt Nelly, das astrophysikalische Neutrino, alles, was sie im Universum sieht. Doch der Weltraum kann einsam sein [...]

It is a fundamental problem in photon science that at X-ray energies, the oscillation frequency of the electromagnetic field is so high that a detector cannot measure the phase of an interacting object. This ‘phase problem’ also occurs in measurements of an object’s atomic-level properties using recoilless nuclear resonant scattering (NRS) of pulsed synchrotron radiation, which is based on the Mössbauer effect.In this thesis, we demonstrate how to use a ptychographic scanning technique to perform computational phase retrieval for an object in the energy domain via overlapping NRS measurements in the time domain. [...]

Compact high-brightness electron beam sources are advantageous for industrial, medicaland scientific applications. Laser-plasma acceleration has the potential to meet thisneed, as it can provide acceleration fields that are orders of magnitude higher than inclassical linear accelerators based on modern radio-frequency technology, allowing formuch smaller accelerators. [...]

This thesis investigates the optimization of a Transition-Edge Sensor (TES) for the Any Light Particle Search II (ALPS II) experiment. The ALPS II experiment searches for axions and axion-like particles, which are predicted by several beyond-standard model theories and are good candidates for dark matter. [...]

There is an ever-increasing demand for structural metals with higher strength. Metals can be strengthened by reducing grain size in their microstructure, but ductility is also concomitantly reduced. [...]

Double parton scattering (DPS) is a mechanism in which two hard parton-levelprocesses take place in a single hadron-hadron collision. This can yield importantcontributions to search processes at the LHC, a prominent channel being like-sign leptonpair production via the production of two W bosons of equal charge in a double Drell-Yan process.The factorization theorems allow to write the DPDs cross-section in terms ofperturbatively computable hard scattering part, and non-perturbative objects calleddouble parton distributions (DPDs), which contain a lot of new information abouthadron structure at the quantum level, such as correlations between partons inpolarization, color, and momentum.In this thesis, we describe transverse-momentum dependence in the process ofproduction of two W bosons in proton-proton collision via double parton scattering.This requires so-called transverse momentum-dependent double parton distributions(DTMDs). [...]