K. R. Schmidt-Sommerfeld
A5007059100- 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
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Computational Physics and Python Applications
- Radiation Detection and Scintillator Technologies
- Distributed and Parallel Computing Systems
- Astrophysics and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Medical Imaging Techniques and Applications
- Particle Accelerators and Free-Electron Lasers
- Structural Analysis of Composite Materials
- Nuclear physics research studies
- Atomic and Subatomic Physics Research
- Islamic Studies and History
- Eurasian Exchange Networks
- Particle accelerators and beam dynamics
- Statistical Distribution Estimation and Applications
- Advanced Data Storage Technologies
- Engineering and Materials Science Studies
- Big Data Technologies and Applications
- Image and Object Detection Techniques
Institut für Technische und Angewandte Physik (Germany)
2025
Max Planck Institute for Physics
2015-2024
Technical University of Munich
2014-2024
The University of Adelaide
2016-2021
Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata
2020
Max Planck Society
2019
Istituto Nazionale di Fisica Nucleare, Trento Institute for Fundamental Physics And Applications
2019
Slovak Academy of Sciences
2018
Institute of Physics of the Slovak Academy of Sciences
2018
Universitatea Națională de Știință și Tehnologie Politehnica București
2016
We report on the first measurement of $p\mathrm{\ensuremath{\Lambda}}$ and $pp$ correlations via femtoscopy method in $p$ + Nb reactions at $\sqrt{{s}_{\mathit{NN}}}=3.18\phantom{\rule{0.28em}{0ex}}\mathrm{GeV}$, studied with High Acceptance Di-Electron Spectrometer (HADES). By comparing experimental correlation function to model calculations, a source size for pairs...
We present the first observation of K^{-} and ϕ absorption within nuclear matter by means π^{-}-induced reactions on C W targets at an incident beam momentum 1.7 GeV/c studied with HADES SIS18/GSI. The double ratio (K^{-}/K^{+})_{W}/(K^{-}/K^{+})_{C} is found to be 0.319±0.009(stat)_{-0.012}^{+0.014}(syst) indicating a larger in heavier as compared lighter ones. measured ϕ/K^{-} ratios π^{-}+C π^{-}+W acceptance are equal 0.55±0.04(stat)_{-0.07}^{+0.06}(syst)...
Pion-induced reactions provide unique opportunities for an unambiguous description of baryonic resonances and their coupling channels by means a partial-wave analysis. Using the secondary pion beam at SIS18, two-pion production in second resonance region has been investigated to unravel role $N(1520){\frac{3}{2}}^{\ensuremath{-}}$resonance intermediate $\ensuremath{\rho}$-meson production. Results on exclusive with one (${\ensuremath{\pi}}^{\ensuremath{-}}p$) two pions...
Abstract Hadron production ( $$\pi ^\pm $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>±</mml:mo> </mml:msup> </mml:math> , proton, $$\Lambda <mml:mi>Λ</mml:mi> $$K_S^0$$ <mml:msubsup> <mml:mi>K</mml:mi> <mml:mi>S</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> $$K^\pm ) in ^- + \textrm{C}$$ <mml:mrow> <mml:mo>-</mml:mo> <mml:mo>+</mml:mo> <mml:mtext>C</mml:mtext> </mml:mrow> and \textrm{W}$$ <mml:mtext>W</mml:mtext> collisions is investigated...
The inclusive production of {\Lambda} hyperons in proton-proton collisions at $\sqrt{s}$ = 3.18 GeV was measured with HADES the GSI Helmholtzzentrum f\"ur Schwerionenforschung Darmstadt. experimental data are compared to a data-based model for individual exclusive channels same reaction. contributions intermediate resonances such as {\Sigma}(1385), {\Delta}++ or N* considered detail. In particular, result partial wave analysis is accounted abundant pK$^+${\Lambda} final state. Model and show...
The production of $\Sigma^{0}$ baryons in the nuclear reaction p (3.5 GeV) + Nb (corresponding to $\sqrt{s_{NN}}=3.18$ is studied with detector set-up HADES at GSI, Darmstadt. $\Sigma^{0}$s were identified via decay $\Sigma^{0} \rightarrow \Lambda \gamma$ subsequent decays $\Lambda \pi^{-}$ coincidence a $e^{+}e^{-}$ pair from either external ($\gamma e^{+} e^{-}$) or internal (Dalitz $\gamma^{*}\rightarrow gamma conversions. differential $\Sigma^0$ cross section integrated over acceptance,...
This work presents the analysis of performance RPC ToF wall HADES, located at GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt. The behavior detector is studied in Au+Au collisions 1.23 AGeV. A main characteristic that all active areas were designed to be electrically shielded order operate high occupancies chambers. Here we show achieved regarding efficiency and timing capabilities different this special design after applied offline corrections data. Also stability intrinsic time...
We present and discuss recent experimental activities of the HADES collaboration on open hidden strangeness production close or below elementary NN threshold. Special emphasis is put feed-down from ϕ mesons to antikaons, presence Ξ- excess in cold nuclear matter comparison statistical model rates p+p data. The implications for interpretation heavy-ion data are discussed as well.
In the ATLAS Muon Spectrometer, Monitored Drift Tube (MDT) chambers and sMDT with half of tube diameter MDTs are used for precision muon track reconstruction. The designed operation at high counting rates due to neutron gamma background irradiation expected HL-LHC future hadron colliders. existing MDT read-out electronics uses bipolar signal shaping which causes an undershoot opposite polarity same charge after a pulse. At short dead time sMDTs, pulses pile up on preceding leading reduction...
In the ATLAS Muon Spectrometer, Monitored Drift Tube (MDT) chambers and sMDT with half of tube diameter MDTs are used for precision muon track reconstruction. The designed operation at high counting rates due to neutron gamma background irradiation expected HL-LHC future hadron colliders. existing MDT read-out electronics uses bipolar signal shaping which causes an undershoot opposite polarity same charge after a pulse. At short dead time sMDTs, pulses pile up on preceding leading reduction...
First information on the timelike electromagnetic structure of baryons in second resonance region has been obtained from measurements invariant mass and angular distributions quasi-free reaction $\pi^- p \to nee$ at $\sqrt{s_{\pi^- p}}$ = 1.49 GeV with High Acceptance Di-Electron Spectrometer (HADES) detector GSI using pion beam impinging a CH$_2$ target. We find total cross section $\sigma (\pi^- nee) 2.97 \pm 0.07^{data} 0.21^{acc} 0.31^{\rm{Z}_{\rm{eff}}} \mu$b. Combined Partial Wave...
Single muon triggers are crucial for the physics programmes at hadron collider experiments. To be sensitive to electroweak processes, single with transverse momentum thresholds down 20 GeV and dimuon even lower required. In order keep rates of these an acceptable level have highly selective, i.e. they must small accidental trigger sharp turn-on curves. The systems LHC experiments future colliders like FCC-hh will use two chamber trigger, fast chambers RPCs coarse spatial resolution much...
Hadron production ($\pi^\pm$, proton, $\Lambda$, $K_S^0$, $K^\pm$) in $\pi^- + \mathrm{C}$ and \mathrm{W}$ collisions is investigated at an incident pion beam momentum of $1.7~\mathrm{GeV}/c$. This comprehensive set data measured with HADES SIS18/GSI significantly extends the existing world on hadron induced reactions provides a new reference for models that are commonly used interpretation heavy-ion collisions. The inclusive differential cross-sections compared state-of-the-art transport...
The Phase-II Upgrade of the ATLAS Muon Detector requires new electronics for readout MDT drift tubes. first processing stage, Amplifier-Shaper-Discriminator (ASD), determines performance crucial parameters like time resolution, gain uniformity, efficiency and noise rejection. An 8-channel ASD chip, using IBM 130 nm CMOS 8RF-DM technology, has been designed, produced tested. area chip is 2.2 × 2.9 square mm size. We present results detailed measurements as well a comparision with simulation...
In this paper we report on the investigation of baryonic resonance production in proton-proton collisions at kinetic energies 1.25 GeV and 3.5 GeV, based data measured with HADES. Exclusive channels npπ+ ppπ0 as well ppe+e− were studied simultaneously framework a one-boson exchange model. The cross sections determined from one-pion for Δ(1232) N(1440) (1.25 GeV) further Δ N* resonances up to 2 GeV/c2 data. energy also analysed within partial wave analysis together set several other...
We present the results of two-pion production in tagged quasi-free np collisions at a deutron incident beam energy 1.25 GeV/c measured with High-Acceptance Di-Electron Spectrometer (HADES) installed GSI. The specific acceptance HADES allowed for first time to obtain high-precision data on π+π− and π−π0 region corresponding large transverse momenta secondary particles. obtained differential cross section provide strong constraints mechanisms various baryon resonance contributions (∆∆,...
The goals of the ongoing and planned ATLAS muon detector upgrades are to increase acceptance for precision momentum measurement triggering improve rate capability chambers in high-background regions corresponding increasing LHC luminosity. Small-diameter Muon Drift Tube (sMDT) have been developed these purposes. With half drift-tube diameter current (MDT) with 30 mm drift tube otherwise unchanged operating parameters, sMDT share all advantages MDTs, but an about order magnitude higher can be...
The Monitored Drift Tube (MDT) chambers of the ATLAS muon spectrometer demonstrated that they provide very precise and robust tracking over large areas. Goals detector upgrades are to increase acceptance for precision momentum measurement triggering improve rate capability in high-background regions when LHC luminosity increases. Small-diameter Muon (sMDT) have been developed these purposes. With half drift-tube diameter MDT otherwise unchanged operating parameters, sMDT share advantages...
The goals of the ongoing and planned ATLAS muon detector upgrades are to increase acceptance for precision momentum measurement triggering improve rate capability chambers in high-background regions corresponding increasing LHC luminosity. Smalldiameter Muon Drift Tube (sMDT) have been developed these purposes. With half drift-tube diameter current (MDT) with 30 mm drift tube otherwise unchanged operating parameters, sMDT share all advantages MDTs, but an about order magnitude higher can be...