A5003964878- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Medical Imaging Techniques and Applications
- Radiation Detection and Scintillator Technologies
- Advanced Data Compression Techniques
- Distributed and Parallel Computing Systems
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Advanced X-ray and CT Imaging
- Scientific Computing and Data Management
- Advanced Data Storage Technologies
- Digital Radiography and Breast Imaging
- Speech and Audio Processing
- Astrophysics and Cosmic Phenomena
- Multimedia Communication and Technology
- Speech Recognition and Synthesis
- Quantum Electrodynamics and Casimir Effect
- Data Visualization and Analytics
University of Bonn
2018-2025
Brandeis University
2023-2024
European Organization for Nuclear Research
2023
The University of Adelaide
2022
Max Planck Institute for Physics
2016-2020
HTW Berlin - University of Applied Sciences
2017
The CRESST experiment is a direct dark matter search which aims to measure interactions of potential particles in an earth-bound detector. With the current stage, CRESST-III, we focus on low energy threshold for increased sensitivity towards light particles. In this manuscript describe analysis one detector operated first run CRESST-III (05/2016-02/2018) achieving nuclear recoil 30.1eV. This result was obtained with 23.6g CaWO$_4$ crystal as cryogenic scintillating calorimeter setup at...
Models for light dark matter particles with masses below 1 GeV/c $$^2$$ are a natural and well-motivated alternative to so-far unobserved weakly interacting massive particles. Gram-scale cryogenic calorimeters provide the required detector performance detect these extend direct search program of CRESST. A prototype 0.5 g sapphire developed $$\nu $$ -cleus experiment has achieved an energy threshold $$E_{th}=(19.7\pm 0.9)$$ eV. This is one order magnitude lower than previous devices...
Abstract The CRESST experiment (Cryogenic Rare Even Search with Superconducting Thermometers), located at Laboratori Nazionali del Gran Sasso in Italy, searches for dark matter particles via their elastic scattering off nuclei a target material. consists of scintillating CaWO 4 crystals, which are operated as cryogenic calorimeters millikelvin temperatures. Each interaction the crystal produces phonon signal and light that is measured by second calorimeter. Since CRESST-II result 2015,...
$K^+\Lambda(1405)$ photoproduction has been studied at the BGOOD experiment via all neutral decay, $\Lambda(1405)\rightarrow\Sigma^0\pi^0$. The unique experimental setup allows both cross section and $\Lambda(1405)$ invariant mass distribution (line shape) to be measured over a broad $K^+$ polar angle range, extending extreme forward angles unattainable previous experiments. Evidence is provided for role of triangle singularity driven by $N^*(2030)$ resonance, which appears contribute...
The CRESST experiment uses cryogenic detectors based on transition-edge sensors to search for dark matter interactions. Each detector module consists of a scintillating CaWO $$_4$$ crystal and silicon-on-sapphire (SOS) light which operate in coincidence (phonon-light technique). 40-mm-diameter SOS disks (2 g mass) used the data taking campaign CRESST-II Phase 2 (2014–2016) reached absolute baseline resolutions $$\sigma =$$ 4–7 eV. This is best performance reported this size. Newly developed...
In Phase 2 of CRESST-II 18 detector modules were operated for about two years (July 2013 - August 2015). Together with this document we are publishing data from which have been used direct dark-matter searches. With these data-sets able to set world-leading limits on the cross section spin-independent elastic scattering dark matter particles off nuclei. We publish energies all events within acceptance regions addition, also electron-recoil band. This can be study interactions electrons...
Identifying the nature and origin of dark matter is one major challenges for modern astro particle physics. Direct dark-matter searches aim at an observation particles interacting within detectors. The focus several such on interactions with nuclei as provided e.g. by weakly massive particles. However, there a variety candidates favoring electrons rather than nuclei. One example are photons, i.e., long-lived vector kinetic mixing to standard-model photons. In this work we present constraints...
Abstract Cryogenic Rare Event Search with Superconducting Thermometers (CRESST) is a long-standing direct dark matter detection experiment cryogenic detectors located at the underground facility Laboratori Nazionali del Gran Sasso in Italy. CRESST-III, third generation of CRESST, was specifically designed to have world-leading sensitivity for low-mass (DM) (less than 2 GeV/ $$\hbox {c}^{2}$$ <mml:math...
We analyzed low-background data from the CRESST-II experiment with a total net exposure of 730 kg days to extract limits on double electron capture processes. established new for $^{40}$Ca $T_{1/2}^{2v2K}>9.9\times10^{21}$ y and $T_{1/2}^{0v2EC}>1.4\times10^{22}$ $^{180}$W T$_{1/2}^{2v2K}>3.1\times10^{19}$ $T_{1/2}^{0v2EC}>9.4\times10^{18}$ at 90% CL. Depending process, these values improve currently best by factor $\sim$1.4-30.
Abstract $$\gamma p \rightarrow K^{+} \Lambda $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>γ</mml:mi> <mml:mi>p</mml:mi> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:mi>Λ</mml:mi> </mml:mrow> </mml:math> differential cross sections and recoil polarisation data from threshold for extremely forward angles are presented. The measurements were performed at the BGOOD experiment ELSA, utilising high angular momentum...
We define a new modeling technique called "3D touch-and-drag," where users select vertices simply by approaching them. Operations are finished removing the 3D cursor (e.g., forefinger) from line or plane in space. These lines planes constrain operations, as is case when using widgets.
In this work, we want to highlight the potential of lithium as a target for spin-dependent dark matter search in cryogenic experiments, with special focus on low-mass region parameter space. We operated prototype detector module based $$\hbox {Li}_2\hbox {MoO}_4$$ crystal an above-ground laboratory. Despite high background environment, sets competitive limit interactions particles protons and neutrons masses between $$0.8~\hbox {GeV/c}^2$$ $$1.5~\hbox .
CRESST-II is a direct dark matter experiment that uses scintillating calorimeters to detect WIMP-induced nuclear scatter processes. Heat and light signals are read out with tungsten transition edge sensors (TESs) optimized toward their sensitivity non-thermal phonons. The usage of superconducting thin film structures (e.g., aluminum) serving as phonon collectors increase the collection area for this signal component an approach improve TES. performance depends on material properties quality...
Abstract Despite the multiple and convincing evidence of existence dark matter (DM) in our Universe, its detection is one most pressing questions particle physics. As today, there no unambiguous hint which could clarify nature DM. For these reasons, a huge experimental effort ongoing, trying to realize experiments can probe properties In particular, direct search are cover largest possible mass range, from few MeVs up TeVs. Particularly suited for sub-GeV region detectors containing light...
The γp→K+Σ0 differential cross section at extremely forward angles was measured the BGOOD experiment. A three-quarter drop in strength over a narrow range energy and strong dependence on polar angle of K+ centre-of-mass reaction is observed 1900 MeV. Residing close to multiple open hidden strangeness thresholds, structure appears consistent with meson-baryon threshold effects which may contribute mechanism.
Abstract In the current direct dark matter search landscape, leading experiments in sub-GeV mass region mostly rely on cryogenic techniques which employ crystalline targets. One attractive type of crystals for these is those containing lithium, due to fact that $$^7\hbox {Li}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mrow /><mml:mn>7</mml:mn></mml:msup><mml:mtext>Li</mml:mtext></mml:mrow></mml:math> an ideal candidate study spin-dependent...
Abstract In this work, a first cryogenic characterization of scintillating $$\hbox {LiAlO}_{2}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mtext>LiAlO</mml:mtext> <mml:mn>2</mml:mn> </mml:msub> </mml:math> single crystal is presented. The results achieved show that material holds great potential as target for direct dark matter search experiments. Three different detector modules obtained from one grown at the Leibniz-Institut für Kristallzüchtung (IKZ) have...
Since the discovery of Λ(1405), it remains poorly described by conventional constituent quark models, and is a candidate for having an “exotic” meson-baryon or “penta-quark” structure, similar to states recently reported in hidden charm sector. The Λ(1405) can be produced reaction γp K + Λ(1405). pure I=0 decay mode into Σ 0 π prohibited mass-overlapping Σ(1385). Combining large aperture forward magnetic spectrometer central BGO crystal calorimeter, BGO-OD experiment ideally suited measure...
Abstract A search for resonant absorption of solar axions by $$^{169}\mathrm {Tm}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mrow /><mml:mn>169</mml:mn></mml:msup><mml:mi>Tm</mml:mi></mml:mrow></mml:math> nuclei was carried out. newly developed approach involving low-background cryogenic bolometer based on $$\mathrm {Tm}_{3} \mathrm {Al}_{5} {O}_{12}$$...