T. Weiler
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View article: Flipped Quartification: Product Group Unification with Leptoquarks
Flipped Quartification: Product Group Unification with Leptoquarks Open
The quartification model is an SU(3)4 extension with a bi-fundamental fermion sector of the well-known SU(3)3 bi-fundamentalfication model. An alternative “flipped” version of the quartification model is obtained by rearrangement of the pa…
View article: Ultra-fast Consolidator Machine Development – Individualized Mass Production of Thermoplastic Tailored Blanks based on Laser-assisted Tape Placement with in-situ Consolidation
Ultra-fast Consolidator Machine Development – Individualized Mass Production of Thermoplastic Tailored Blanks based on Laser-assisted Tape Placement with in-situ Consolidation Open
The new UItra-Fast Consolidator Machine development offers both high flexibility and mass production of tailored thermoplastic laminates with reduced scrap. The machine system can be configurated to achieve fully consolidated multi-layer l…
View article: Neutrinos as a probe of the Universe
Neutrinos as a probe of the Universe Open
A brief essay on how studying neutrinos can help us to better understand the Universe.
View article: Oscillations of sterile neutrinos from dark matter decay eliminates the IceCube-Fermi tension
Oscillations of sterile neutrinos from dark matter decay eliminates the IceCube-Fermi tension Open
IceCube has observed a flux of cosmic neutrinos, with a “bump” in the energy range 10 ≲ E/TeV≲100 that creates a 3σ tension with γ-ray data from the Fermi satellite. This has been interpreted as evidence for a population of hidden cosmic-r…
View article: Theoretical Investigations in Elementary Particle Physics and Cosmological Physics
Theoretical Investigations in Elementary Particle Physics and Cosmological Physics Open
The goals of this project were to improve our understanding of the fundamental constituents of the universe, at both the smallest and largest scales. At the smallest scales, we examined the masses and mixings of neutrinos, to understand an…
View article: Radial self-stabilizing reluctance magnetic bearing
Radial self-stabilizing reluctance magnetic bearing Open
A novel design for a minimum loss reluctance magnetic bearing, with only one active control loop, will be presented in this paper. On the basis of extensive numerical simulations, the suitability of the bearing concept for machine tools an…
View article: Flipped Quartification and a composite $b$-quark
Flipped Quartification and a composite $b$-quark Open
An alternative "flipped" version of the quartification model is obtained by rearrangement of the particle assignments. The model has two standard (trinification) families and one flipped quartification family. An interesting phenomenologic…
View article: Migdal effect and photon bremsstrahlung in effective field theories of dark matter direct detection and coherent elastic neutrino-nucleus scattering
Migdal effect and photon bremsstrahlung in effective field theories of dark matter direct detection and coherent elastic neutrino-nucleus scattering Open
Dark matter direct detection experiments have limited sensitivity to light dark matter (below a few GeV), due to the challenges of lowering energy thresholds for the detection of nuclear recoil to below $\\mathcal{O}$(keV). While impressiv…
View article: The Pros and Cons of Beyond Standard Model Interpretations of ANITA Events
The Pros and Cons of Beyond Standard Model Interpretations of ANITA Events Open
The Antarctic Impulsive Transient Antenna (ANITA) experiment has observed two air shower events with energy $\\sim 500~{\\rm PeV}$ emerging from the Earth with exit angles $\\sim 30^\\circ$ above the horizon. As was immediately noted by th…
View article: The pros and cons of beyond standard model interpretations of ANITA events
The pros and cons of beyond standard model interpretations of ANITA events Open
The Antarctic Impulsive Transient Antenna (ANITA) experiment has observed two air shower events with energy $\sim 500~{\rm PeV}$ emerging from the Earth with exit angles $\sim 30^\circ$ above the horizon. As was immediately noted by the AN…
View article: Thermischer Skineffekt beim Laserunterstützten Tapelegen von thermoplastischen Faserverbundkunststoffen
Thermischer Skineffekt beim Laserunterstützten Tapelegen von thermoplastischen Faserverbundkunststoffen Open
The thesis at hand presents thermal models to predict the temperature development in laser-assisted thermoplastic tape placement processes. A focus is placed on the time-dependent through-thickness temperature distribution at increased spe…
View article: Sterile Neutrinos with Altered Dispersion Relations as an Explanation\n for Neutrino Anomalies
Sterile Neutrinos with Altered Dispersion Relations as an Explanation\n for Neutrino Anomalies Open
Recently the MiniBooNE Collaboration has confirmed its anomalous excess in\n(anti)muon- to (anti)electron-neutrino oscillation data. Combined with\nlong-standing results from the LSND experiment this amounts to a 6.1 sigma\nevidence for ne…
View article: Sterile Neutrinos with Altered Dispersion Relations as an Explanation for the MiniBooNE, LSND, Gallium and Reactor Anomalies
Sterile Neutrinos with Altered Dispersion Relations as an Explanation for the MiniBooNE, LSND, Gallium and Reactor Anomalies Open
Recently the MiniBooNE Collaboration has reported an anomalous excess in muon to electron (anti-)neutrino oscillation data. Combined with long-standing results from the LSND experiment this amounts to a 6.1 sigma evidence for new physics b…
View article: Sterile Neutrinos with Altered Dispersion Relations as an Explanation for Neutrino Anomalies
Sterile Neutrinos with Altered Dispersion Relations as an Explanation for Neutrino Anomalies Open
Recently the MiniBooNE Collaboration has confirmed its anomalous excess in (anti)muon- to (anti)electron-neutrino oscillation data. Combined with long-standing results from the LSND experiment this amounts to a 6.1 sigma evidence for new p…
View article: A large-scale framework for storage, access and analysis of time series data in the manufacturing domain
A large-scale framework for storage, access and analysis of time series data in the manufacturing domain Open
Time series data from machining process monitoring promises to be a rich resource for optimization applications. Limited data access, however restricts the number of potential applications significantly. Semantic technologies such as ontol…
View article: Enhancing dark matter annihilation rates with dark bremsstrahlung
Enhancing dark matter annihilation rates with dark bremsstrahlung Open
Many dark matter interaction types lead to annihilation processes which suffer from p-wave suppression or helicity suppression, rendering them subdominant to unsuppressed s-wave processes. Here we demonstrate that the natural inclusion of …
View article: Evidence for a break in the spectrum of astrophysical neutrinos
Evidence for a break in the spectrum of astrophysical neutrinos Open
The announcement by the IceCube Collaboration of the observation of 53 astrophysical neutrino candidates in the energy range 0.03 \alt E_\nu/PeV \alt 2 has been greeted with a great deal of justified excitement. Herein we provide fits of s…
View article: Strange fireball as an explanation of the muon excess in Auger data
Strange fireball as an explanation of the muon excess in Auger data Open
We argue that ultrahigh energy cosmic ray collisions in the Earth atmosphere\ncan probe the strange quark density of the nucleon. These collisions have\ncenter-of-mass energies \\agt 10^{4.6} A GeV, where A \\geq 14 is the nuclear\nbaryon …
View article: Suppression of cosmological sterile neutrino production by altered dispersion relations
Suppression of cosmological sterile neutrino production by altered dispersion relations Open
Big Bang Nucleosynthesis imposes stringent bounds on light sterile neutrinos\nmixing with the active flavors. Here we discuss how altered dispersion\nrelations can weaken such bounds and allow compatibility of new sterile\nneutrino degrees…
View article: Erratum: IceCube neutrinos, decaying dark matter, and the Hubble constant [Phys. Rev. D<b>92</b>, 061301(R) (2015)]
Erratum: IceCube neutrinos, decaying dark matter, and the Hubble constant [Phys. Rev. D<b>92</b>, 061301(R) (2015)] Open
Cosmological parameters deduced from the Planck measurements of anisotropies\nin the cosmic microwave background are at some tension with direct astronomical\nmeasurements of various parameters at low redshifts. Very recently, it has been\…
View article: The excess radio background and fast radio transients
The excess radio background and fast radio transients Open
In the last few years ARCADE 2, combined with older experiments, has detected\nan additional radio background, measured as a temperature and ranging in\nfrequency from 22 MHz to 10 GHz, not accounted for by known radio sources and\nthe cos…
View article: Dark matter at the LHC: Effective field theories and gauge invariance
Dark matter at the LHC: Effective field theories and gauge invariance Open
Effective field theory (EFT) formulations of dark matter interactions have\nproven to be a convenient and popular way to quantify LHC bounds on dark\nmatter. However, some of the non-renormalizable EFT operators considered do not\nrespect …
View article: IceCube neutrinos, decaying dark matter, and the Hubble constant
IceCube neutrinos, decaying dark matter, and the Hubble constant Open
Reference [1] was revised after our paper was published. The dark-matter decay width required to reconcile the tension in the determination of the Hubble constant was reduced by 2 orders of magnitude.
View article: Majorana dark matter through the Higgs portal under the vacuum stability lamppost
Majorana dark matter through the Higgs portal under the vacuum stability lamppost Open
We study the vacuum stability of a minimal Higgs portal model in which the standard model (SM) particle spectrum is extended to include one complex scalar field and one Dirac fermion. These new fields are singlets under the SM gauge group …
View article: Aspects of the flavor triangle for cosmic neutrino propagation
Aspects of the flavor triangle for cosmic neutrino propagation Open
Over cosmic distances, astrophysical neutrino oscillations average out to a\nclassical flavor propagation matrix $\\mathscr{P}$. Thus, flavor ratios injected\nat the cosmic source $W_e,W_\\mu,W_\\tau$ evolve to flavor ratios at Earthly\nde…
View article: Evidence for an energy-invariant “edge” in proton-proton scattering at very high energies
Evidence for an energy-invariant “edge” in proton-proton scattering at very high energies Open
Accurate fits to $pp$ and $\bar pp$ cross section data up to Tevatron energies, incorporating the constraints imposed by analyticity and unitarity, successfully predict the results of recent LHC and cosmic ray measurements, and suggest tha…