A5065722110- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Cosmology and Gravitation Theories
- Superconducting and THz Device Technology
- Physics of Superconductivity and Magnetism
- Nuclear Physics and Applications
- Nuclear physics research studies
- Scientific Research and Discoveries
- Astrophysical Phenomena and Observations
- Muon and positron interactions and applications
- Computational Physics and Python Applications
- Advanced Thermodynamics and Statistical Mechanics
- Radiation Therapy and Dosimetry
- Quantum Mechanics and Applications
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Advanced Semiconductor Detectors and Materials
- CCD and CMOS Imaging Sensors
- Superconducting Materials and Applications
- Quantum Chromodynamics and Particle Interactions
University of Tübingen
2015-2024
Institute of High Energy Physics
2017-2023
TU Wien
2017-2023
Institute of Experimental Physics of the Slovak Academy of Sciences
2023
University of Zurich
2018
Max Planck Institute for Physics
2000-2017
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso
2000-2017
Excellence Cluster Universe
2016-2017
Technical University of Munich
1993-2017
University of Oxford
2003-2017
The CRESST-II cryogenic Dark Matter search, aiming at detection of WIMPs via elastic scattering off nuclei in CaWO4 crystals, completed 730 kg days data taking 2011. We present the collected with eight detector modules, each a two-channel readout; one for phonon signal and other coincidently produced scintillation light. former provides precise measure energy deposited by an interaction, ratio light to can be used discriminate different types interacting particles thus distinguish possible...
Neutrinoless double beta decay is a process that violates lepton number conservation. It predicted to occur in extensions of the standard model particle physics. This Letter reports results from phase I Germanium Detector Array (GERDA) experiment at Gran Sasso Laboratory (Italy) searching for neutrinoless isotope $^{76}\mathrm{Ge}$. Data considered present analysis have been collected between November 2011 and May 2013 with total exposure 21.6 kg yr. A blind performed. The background index...
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...
The CRESST-II experiment uses cryogenic detectors to search for nuclear recoil events induced by the elastic scattering of dark matter particles in CaWO$_4$ crystals. Given low energy threshold our combination with light target nuclei, mass can be probed high sensitivity. In this letter we present results from data a single detector module corresponding 52 kg live days. A blind analysis is carried out. With an recoils 307 eV substantially enhance sensitivity matter. Thereby, extend reach...
The GERmanium Detector Array (GERDA) experiment searched for the lepton-number-violating neutrinoless double-$\beta$ ($0\nu\beta\beta$) decay of $^{76}$Ge, whose discovery would have far-reaching implications in cosmology and particle physics. By operating bare germanium diodes, enriched an active liquid argon shield, GERDA achieved unprecedently low background index $5.2\times10^{-4}$ counts/(keV$\cdot$kg$\cdot$yr) signal region met design goal to collect exposure 100 kg$\cdot$yr a...
The GERDA experiment searches for the lepton-number-violating neutrinoless double-β decay of ^{76}Ge (^{76}Ge→^{76}Se+2e^{-}) operating bare Ge diodes with an enriched fraction in liquid argon. exposure broad-energy germanium type (BEGe) detectors is increased threefold respect to our previous data release. BEGe feature excellent background suppression from analysis time profile detector signals. In window a level 1.0_{-0.4}^{+0.6}×10^{-3} counts/(keV kg yr) has been achieved; if normalized...
The CRESST-II cryogenic dark matter search aims for the detection of WIMPs via elastic scattering off nuclei in CaWO $$_4$$ crystals. We present results from a low-threshold analysis single upgraded detector module. This module efficiently vetoes low energy backgrounds induced by $$\alpha $$ -decays on inner surfaces detector. With an exposure 29.35 kg live days collected 2013 we set limit spin-independent WIMP-nucleon which probes new region parameter space WIMP masses below 3 GeV/c $$^2$$...
The Gerda collaboration is performing a search for neutrinoless double beta decay of 76Ge with the eponymous detector. experiment has been installed and commissioned at Laboratori Nazionali del Gran Sasso started operation in November 2011. design, construction first operational results are described, along detailed information from R&D phase.
The observation of neutrinoless double-beta decay (0${\nu}{\beta}{\beta}$) would show that lepton number is violated, reveal neutrinos are Majorana particles, and provide information on neutrino mass. A discovery-capable experiment covering the inverted ordering region, with effective masses 15 - 50 meV, will require a tonne-scale excellent energy resolution extremely low backgrounds, at level $\sim$0.1 count /(FWHM$\cdot$t$\cdot$yr) in region signal. current generation $^{76}$Ge experiments...
The Cryogenic Dark Matter Search (CDMS) employs Ge and Si detectors to search for weakly interacting massive particles (WIMPs) via their elastic-scattering interactions with nuclei while discriminating against of background particles. CDMS data, accounting the neutron background, give limits on spin-independent WIMP-nucleon cross section that exclude unexplored parameter space above 10 GeV/c2 WIMP mass and, at >75% C.L., entire 3sigma allowed region signal reported by DAMA experiment.
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...
A discovery that neutrinos are not the usual Dirac but Majorana fermions, i.e. identical to their antiparticles, would be a manifestation of new physics with profound implications for particle and cosmology. generate neutrinoless double-$\beta$ ($0\nu\beta\beta$) decay, matter-creating process without balancing emission antimatter. So far, 0$\nu\beta\beta$ decay has eluded detection. The GERDA collaboration searches $0\nu\beta\beta$ $^{76}$Ge by operating bare germanium detectors in an...
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,...
We present limits on the spin-independent interaction cross section of dark matter particles with silicon nuclei, derived from data taken a cryogenic calorimeter 0.35 g target mass operated in CRESST-III experiment. A baseline nuclear recoil energy resolution (1.36±0.05) eVnr, currently lowest reported for macroscopic particle detectors, and corresponding threshold (10.0±0.2) eVnr have been achieved, improving sensitivity to light masses below 160 MeV/c2 by factor up 20 compared previous...
A search for neutrinoless $\beta\beta$ decay processes accompanied with Majoron emission has been performed using data collected during Phase I of the GERmanium Detector Array (GERDA) experiment at Laboratori Nazionali del Gran Sasso INFN (Italy). Processes spectral indices n = 1, 2, 3, 7 were searched for. No signals found and lower limits order 10$^{23}$ yr on their half-lives derived, yielding substantially improved results compared to previous experiments $^{76}$Ge. new result half-life...
The GERmanium Detector Array (GERDA) experiment at the Gran Sasso underground laboratory (LNGS) of INFN is searching for neutrinoless double beta decay 76Ge. signature signal a monoenergetic peak 2039 keV, Q-value decay, Q_bb. To avoid bias in search, present analysis does not consider all those events, that fall 40 keV wide region centered around main parameters needed are described. A background model was developed to describe observed energy spectrum. contains several contributions,...
The GERDA experiment located at the LNGS searches for neutrinoless double beta (0\nu\beta\beta) decay of ^{76}Ge using germanium diodes as source and detector. In Phase I eight semi-coaxial five BEGe type detectors have been deployed. latter is used in this field research first time. All are made from material with enriched fraction. experimental sensitivity can be improved by analyzing pulse shape detector signals aim to reject background events. This paper documents algorithms developed...
The Double Chooz collaboration presents a measurement of the neutrino mixing angle θ 13 using reactor $$ \overline{\nu_{\mathrm{e}}} observed via inverse beta decay reaction in which neutron is captured on hydrogen. This based 462.72 live days data, approximately twice as much data previous such analysis, collected with detector positioned at an average distance 1050 m from two cores. Several novel techniques have been developed to achieve significant reductions backgrounds and systematic...
The GERDA collaboration is performing a sensitive search for neutrinoless double beta decay of $^{76}$Ge at the INFN Laboratori Nazionali del Gran Sasso, Italy. upgrade experiment from Phase I to II has been concluded in December 2015. first data release shows that goal suppress background by one order magnitude compared achieved. thus will remain background-free up its design exposure (100 kg yr). It reach thereby half-life sensitivity more than 10$^{26}$ yr within 3 years collection. This...
The GERmanium Detector Array (Gerda) at the Gran Sasso Underground Laboratory (LNGS) searches for neutrinoless double beta decay ( $$0\nu \beta $$ ) of $$^{76}$$ Ge. Germanium detectors made material with an enriched Ge fraction act simultaneously as sources and this decay. During Phase I theexperiment mainly refurbished semi-coaxial from former experiments were used. For upcoming II, 30 new broad energy germanium (BEGe)-type produced. A subgroup these has already been deployed in Gerda...