# Publications

### Probing lepton number violating interactions in rare kaon decays

We investigate the possibility to probe lepton number violating (LNV) operators in the rare kaon decay $K \to \pi \nu\nu$. Performing …

### A frequentist analysis of three right-handed neutrinos with GAMBIT

The extension of the Standard Model by right-handed neutrinos can not only explain the active neutrino masses via the seesaw mechanism, …

### Dark Matter bound-state formation at higher order: a non-equilibrium quantum field theory approach

The formation of meta-stable dark matter bound states in coannihilating scenarios could efficiently occur through the scattering with a …

### SUSY-QCD corrected and Sommerfeld enhanced stau annihilation into heavy quarks with scheme and scale uncertainties

We investigate stau-antistau annihilation into heavy quarks in the phenomenological Minimal Supersymmetric Standard Model within the …

### Confronting minimal freeze-in models with the LHC

We present a class of dark matter models, in which the dark matter particle is a feebly interacting massive particle (FIMP) produced …

### Squark-pair annihilation into quarks at next-to-leading order

The Minimal Supersymmetric Standard Model (MSSM) is under intense scrutiny at the LHC and in dark matter searches. Interestingly, …

### Combined collider constraints on neutralinos and charginos

Searches for supersymmetric electroweakinos have entered a crucial phase, as the integrated luminosity of the Large Hadron Collider is …

### Higgs-mediated bound states in dark-matter models

It has been recently demonstrated that the 125 GeV Higgs boson can mediate a long-range force between TeV-scale particles, that can …

### LHC-friendly minimal freeze-in models

We propose simple freeze-in models where the observed dark matter abundance is explained via the decay of an electrically charged …

### Radiative bound-state formation in unbroken perturbative non-Abelian theories and implications for dark matter

We compute the cross-sections for the radiative capture of non-relativistic particles into bound states, in unbroken perturbative …

### Higgs Enhancement for the Dark Matter Relic Density

We consider the long-range effect of the Higgs on the density of thermal-relic dark matter. While the electroweak gauge boson and gluon …

### Les Houches 2017: Physics at TeV Colliders New Physics Working Group Report

We present the activities of the New Physics' working group for the Physics at TeV Colliders’ workshop (Les Houches, France, …

### Probing Leptogenesis

The focus of this chapter lies on the possible experimental tests of leptogenesis scenarios. We consider both leptogenesis generated …

### Neutrinoless Double Beta Decay and the Baryon Asymmetry of the Universe

We discuss the impact of the observation of neutrinoless double beta decay on the washout of lepton number in the early universe. …

### The Di-Photon Excess in a Perturbative SUSY Model

We show that a 750 GeV di-photon excess as reported by the ATLAS and CMS experiments can be reproduced by the Minimal Dirac Gaugino …

### Predicting the neutralino relic density in the MSSM more precisely

The dark matter relic density being a powerful observable to constrain models of new physics, the recent experimental progress calls …

### Theoretical uncertainty of the supersymmetric dark matter relic density from scheme and scale variations

For particle physics observables at colliders such as the LHC at CERN, it has been common practice for many decades to estimate the …

### Precision predictions for supersymmetric dark matter

The dark matter relic density has been measured by Planck and its predecessors with an accuracy of about 2%. We present theoretical …

### Precise Prediction of the Dark Matter Relic Density within the MSSM

With the latest Planck results the dark matter relic density is determined to an unprecedented precision. In order to reduce current …

### Interplay of gaugino (co)annihilation processes in the context of a precise relic density calculation

The latest Planck data allow one to determine the dark matter relic density with previously unparalleled precision. In order to achieve …

### Impact of Neutrinoless Double Beta Decay on Models of Baryogenesis

Interactions that manifest themselves as lepton number violating processes at low energies in combination with sphaleron transitions …

### Falsifying High-Scale Baryogenesis with Neutrinoless Double Beta Decay and Lepton Flavor Violation

Interactions that manifest themselves as lepton number violating processes at low energies in combination with sphaleron transitions …

### SUSY-QCD corrections to stop annihilation into electroweak final states including Coulomb enhancement effects

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### One-loop corrections to neutralino-stop coannihilation revisited

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### Neutrinoless Double Beta Decay and High-Scale Baryogenesis

The constraints on baryogenesis models obtained from an observation of neutrinoless double beta decay are discussed. The lepton number …

### Lepton Number Violation and the Baryon Asymmetry of the Universe

Neutrinoless double beta decay, lepton number violating collider processes and the Baryon Asymmetry of the Universe (BAU) are …

### Flipped GUT Inflation

We analyse the prospects for constructing hybrid models of inflation that provide a dynamical realisation of the apparent closeness …

### Falsifying High-Scale Leptogenesis at the LHC

Measuring a non-zero value for the cross section of any lepton number violating (LNV) process would put a strong lower limit on the …

### Impact of Lepton Number Violation at the LHC on Models of Leptogenesis

The discovery of lepton number violation (LNV) at the LHC would have profound consequences for the viability of high-scale leptogenesis …

### Supersymmetric QCD Corrections and Phenomenological Studies in Relation to Coannihilation of Dark Matter

In this thesis, we assume a minimal supersymmetric extension of the Standard Model (MSSM) with conserved R -parity such that the …

### Neutralino-stop coannihilation into electroweak gauge and Higgs bosons at one loop

We compute the full O(alpha_s) supersymmetric QCD corrections for neutralino-stop co-annihilation into electroweak gauge and Higgs …

### Impact of SUSY-QCD corrections on neutralino-stop co-annihilation and the neutralino relic density

We have calculated the full O(alpha_s) supersymmetric QCD corrections to neutralino-stop co-annihilation into electroweak vector and …