Ruth Pöttgen
A5108166861- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- Dark Matter and Cosmic Phenomena
- Quantum Chromodynamics and Particle Interactions
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Cosmology and Gravitation Theories
- Distributed and Parallel Computing Systems
- Neutrino Physics Research
- Advanced Data Storage Technologies
- Medical Imaging Techniques and Applications
- Radiation Therapy and Dosimetry
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Scientific Computing and Data Management
- Superconducting Materials and Applications
- Big Data Technologies and Applications
- Particle Accelerators and Free-Electron Lasers
- Black Holes and Theoretical Physics
- Rare-earth and actinide compounds
- Hydrogen Storage and Materials
- Iron-based superconductors research
- Photocathodes and Microchannel Plates
Lund University
2020-2025
Laboratoire d’Annecy de Physique des Particules
2024
Université Savoie Mont Blanc
2023
Institut National de Physique Nucléaire et de Physique des Particules
2023
Centre National de la Recherche Scientifique
2007-2023
University of British Columbia
2023
Stockholm University
2016-2017
European Organization for Nuclear Research
2013-2015
University of Copenhagen
2015
Institute of Particle Physics
2015
The ATLAS Collaboration has measured the inclusive production of $Z$ bosons via their decays into electron and muon pairs in $p+$Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV Large Hadron Collider. measurements are made using data corresponding to integrated luminosities 29.4 nb$^{-1}$ 28.1 for $Z \rightarrow ee$ \mu\mu$, respectively. results from two channels consistent combined obtain a cross section times \ell\ell$ branching ratio, over rapidity region $|y^{*}_{Z}|<3.5$, 139.8 $\pm$ 4.8...
Particle physics today faces the challenge of explaining mystery dark matter, origin matter over anti-matter in Universe, neutrino masses, apparent fine-tuning electro-weak scale, and many other aspects fundamental physics. Perhaps most striking frontier to emerge search for answers involves new at mass scales comparable familiar below GeV-scale, or even radically below, down sub-eV scales, with very feeble interaction strength. New theoretical ideas address questions predict such feebly...
The constituents of dark matter are still unknown, and the viable possibilities span a vast range masses. physics community has established searching for sub-GeV as high priority identified accelerator-based experiments an essential facet this search strategy. A key goal program is testing broad idea thermally produced through designed to directly produce particles. most sensitive way production light use primary electron beam it in fixed-target collisions. Light Dark Matter eXperiment...
We study baryon number violation in R-parity violating supersymmetry with focus on ΔB = 2 processes which allow neutron-anti-neutron (n − $$ \overline{n} ) oscillations. provide prospects for going beyond the present limits by means of a new search n The motivation is recently proposed oscillation experiment at European Spallation Source Lund, projected to be able improve current bound transition probability quasi-free regime three orders magnitude. consider various giving rise and extract...
A bstract Fixed-target experiments using primary electron beams can be powerful discovery tools for light dark matter in the sub-GeV mass range. The Light Dark Matter eXperiment (LDMX) is designed to measure missing momentum high-rate fixed-target reactions with beam energies of 4 GeV 16 GeV. prerequisite achieving several important sensitivity milestones capability efficiently reject backgrounds associated few-GeV bremsstrahlung, by twelve orders magnitude, while maintaining high efficiency...
Three spare modules of the ATLAS Tile Calorimeter were exposed to test beams from Super Proton Synchrotron accelerator at CERN in 2017. The measurements energy response and resolution detector positive pions kaons protons with range 16 30 GeV are reported. results have uncertainties few percent. They compared predictions Geant4-based simulation program used estimate proton-proton events Large Hadron Collider. determinations obtained using experimental simulated data agree within uncertainties.
The ATLAS experiment is located at the European Center for Nuclear Research (CERN) in Switzerland. It designed to observe collisions Large Hadron Collider (LHC): world's largest and highest-energy particle accelerator. Event triggering Data Acquisition one of extraordinary challenges faced by detectors high luminosity LHC collider upgrade. During 2011, reached instantaneous luminosities 4 × 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
A bstract The Light Dark Matter eXperiment (LDMX) is an electron-beam fixed-target experiment designed to achieve comprehensive model independent sensitivity dark matter particles in the sub-GeV mass region. An upgrade LCLS-II accelerator will increase beam energy available LDMX from 4 8 GeV. Using detailed GEANT4-based simulations, we investigate effect of increased on capabilities separate signal and background, demonstrate that veto methodology developed for GeV successfully rejects...
The ternary gallides Ce(Rh1-xIrx)Ga with x = 0, 0.54, and 1 were synthesized from the elements by arc-melting. structures of these intermediate valence compounds investigated on basis powder single-crystal X-ray diffractometer data: TiNiSi type, Pnma, a 688.2(2), b 439.6(1), c 788.9(1) pm, wR2 0.0493, 563 F2 values, 20 variable parameters for CeRhGa; 685.5(1), 436.0(1), 782.7(1) 0.0685, 21 Ce(Rh0.46Ir0.54)Ga; 690.1(1), 436.6(1) 785.2(2) 0.0810, 562 CeIrGa. rhodium (or iridium) gallium atoms...
The ATLAS Level-1 Central Trigger Processor (CTP) combines information from calorimeter and muon trigger processors as well other sources makes the final Accept (L1A) decision. Due to increasing luminosity of LHC growing demands physics monitoring placed on system, current CTP has reached its design limits. Therefore in order provide some margin for future operation, will be upgraded during shutdown 2013/14.
The increased energy and luminosity of the LHC in run-2 data taking period requires a more selective trigger menu order to satisfy physics goals ATLAS. Therefore electronics central system is upgraded allow for larger variety sophisticated criteria. In addition, software controlling processor (CTP) has been redesigned CTP accommodate three freely configurable separately operating sets sub detectors, each independently using almost full functionality hardware. This new approach its...
The Central Trigger Processor (CTP) is the final stage of ATLAS first level trigger system which reduces collision rate 40 MHz to a Level-1 event 100 kHz. An upgrade CTP currently underway significantly increase number inputs and combinations, allowing additional flexibility for menu. We present hardware FPGA firmware newly designed core module (CTPCORE+) CTP, as well results from used early software prototyping based on commercial evaluation boards. First test result CTPCORE+ will also be shown.
Particle physics experiments rely extensively on computing and data services, making e-infrastructure an integral part of the research collaboration. Constructing operating distributed can however be challenging for a smaller-scale The Light Dark Matter eXperiment (LDMX) is planned small-scale accelerator-based experiment to search dark matter in sub-GeV mass region. Finalizing design detector relies Monte-Carlo simulation expected processes. A pilot project was proposed better utilize...