L. Schlüter
A5079305032- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Muon and positron interactions and applications
- Adolescent and Pediatric Healthcare
- Radiation Detection and Scintillator Technologies
- Maternal Mental Health During Pregnancy and Postpartum
- Global Maternal and Child Health
- Particle Detector Development and Performance
- Noncommutative and Quantum Gravity Theories
- Particle accelerators and beam dynamics
Lawrence Berkeley National Laboratory
2024-2025
Max Planck Institute for Physics
2019-2025
Technical University of Munich
2019-2022
Bernhard Nocht Institute for Tropical Medicine
2013
We report on the data set, handling, and detailed analysis techniques of first neutrino-mass measurement by Karlsruhe Tritium Neutrino (KATRIN) experiment, which probes absolute scale via $\beta$-decay kinematics molecular tritium. The source is highly pure, cryogenic T$_2$ gas. $\beta$ electrons are guided along magnetic field lines toward a high-resolution, integrating spectrometer for energy analysis. A silicon detector counts above threshold spectrometer, so that scan thresholds produces...
We present the results of light sterile neutrino search from second KATRIN measurement campaign in 2019. Approaching nominal activity, $3.76 \times 10^6$ tritium $\beta$-electrons are analyzed an energy window extending down to $40\,$eV below endpoint at $E_0 = 18.57\,$keV. consider $3\nu+1$ framework with three active and one flavor. The analysis is sensitive a fourth mass eigenstate $m_4^2\lesssim1600\,$eV$^2$ active-to-sterile mixing $|U_{e4}|^2 \gtrsim 6 10^{-3}$. As no sterile-neutrino...
In low-income countries, perinatal depression is common, but longitudinal data on its influence child health are rare. We examined the association between maternal and febrile illness in children. There were 654 mother/child dyads Ghana Côte d'Ivoire that enrolled a prospective birth cohort 2010–2011 underwent 2-years of follow up. Mothers for using Patient Health Questionnaire module antepartum 3 12 months postpartum. The hazard children depressed nondepressed mothers was estimated...
Abstract We report the results of second measurement campaign Karlsruhe Tritium Neutrino (KATRIN) experiment. KATRIN probes effective electron anti-neutrino mass, m ν , via a high-precision tritium β-decay spectrum close to its endpoint at 18.6 keV. In physics run presented here, source activity was increased by factor 3.8 and background reduced 25% with respect first campaign. A sensitivity on 0.7 eV/c 2 90% confidence level (CL) reached. This is sub-eV from direct neutrino-mass The best...
Some extensions of the Standard Model Particle Physics allow for Lorentz invariance and Charge-Parity-Time (CPT)-invariance violations. In neutrino sector strong constraints have been set by neutrino-oscillation time-of-flight experiments. However, some Lorentz-invariance-violating parameters are not accessible via these probes. this work, we focus on $(a_{\text{of}}^{(3)})_{00}$, $(a_{\text{of}}^{(3)})_{10}$ $(a_{\text{of}}^{(3)})_{11}$ which would manifest themselves in a non-isotropic...
The Karlsruhe Tritium Neutrino (KATRIN) experiment aims at measuring the effective electron neutrino mass with a sensitivity of 0.2 eV/c2, i.e., improving on previous measurements by an order magnitude. data taking KATRIN commenced in early 2019, and after only few weeks recording, analysis these showed success KATRIN, known limit factor about two. This very much could be ascribed to fact that most system components met, or even surpassed, required specifications during long-term operation....
Abstract The KATRIN experiment aims to measure the effective electron antineutrino mass $$m_{\overline{\nu }_e}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>m</mml:mi><mml:msub><mml:mover><mml:mi>ν</mml:mi><mml:mo>¯</mml:mo></mml:mover><mml:mi>e</mml:mi></mml:msub></mml:msub></mml:math> with a sensitivity of $${0.2}\,{\hbox {eV}/\hbox {c}^2}$$ xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mrow><mml:mn>0.2</mml:mn></mml:mrow><mml:mspace...
Abstract The KATRIN (Karlsruhe Tritium Neutrino) experiment is designed to determine the effective mass of electron anti-neutrino with an unprecedented sensitivity 0.2 eV/c 2 (90% C.L.) in a direct and model-independent way. β-decay electrons, emitted high-luminosity molecular source, are analyzed MAC-E filter. squared inferred from fit integral spectrum energy window close tritium endpoint. In this work, we report on analysis first four-week science run spring 2019. Considering statistical...
Neutrinos sind die häufigsten Materieteilchen im Universum. Aber viele ihrer Eigenschaften wie ihre Masse bis heute unbekannt. Das Karlsruhe Tritium Neutrino Experiment (KATRIN) stellt nun neuen Ergebnisse der aufwendigsten Massenbestimmung Geschichte vor: leichter als 0,8 eV, was weniger einem Fünfhunderttausendstel Elektronenmasse entspricht.