B. S. Schlimme
A5030091407- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Radiation Detection and Scintillator Technologies
- Nuclear physics research studies
- Particle Detector Development and Performance
- Nuclear Physics and Applications
- High-Energy Particle Collisions Research
- Atomic and Molecular Physics
- Atomic and Subatomic Physics Research
- Dark Matter and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- Advanced NMR Techniques and Applications
- Photocathodes and Microchannel Plates
- X-ray Spectroscopy and Fluorescence Analysis
- Electron and X-Ray Spectroscopy Techniques
- Advanced Chemical Physics Studies
- Medical Imaging Techniques and Applications
- Particle accelerators and beam dynamics
- Quantum, superfluid, helium dynamics
- High-pressure geophysics and materials
- Radiation Therapy and Dosimetry
- Neutrino Physics Research
- Solar and Space Plasma Dynamics
- Advanced Frequency and Time Standards
- Crystallography and Radiation Phenomena
Johannes Gutenberg University Mainz
2015-2024
Tel Aviv University
2019-2020
Jožef Stefan Institute
2020
GSI Helmholtz Centre for Heavy Ion Research
2016-2018
Friedrich-Alexander-Universität Erlangen-Nürnberg
2018
Helmholtz Institute Mainz
2016
Max Planck Institute for Nuclear Physics
2013
New precise results of a measurement the elastic electron-proton scattering cross section performed at Mainz Microtron MAMI are presented. About 1400 sections were measured with negative four-momentum transfers squared up to Q^2=1 (GeV/c)^2 statistical errors below 0.2%. The electric and magnetic form factors proton extracted by fits large variety factor models directly sections. show some features scale pion cloud. charge radii determined be r_E=0.879(5)(stat.)(4)(syst.)(2)(model)(4)(group)...
This paper describes a precise measurement of electron scattering off the proton at momentum transfers $0.003\ensuremath{\lesssim}{Q}^{2}\ensuremath{\lesssim}1$ ${\mathrm{GeV}}^{2}$. The average point-to-point error cross sections in this experiment is $\ensuremath{\sim}0.37%$. These data are used for coherent new analysis together with all world unpolarized and polarized from very smallest to highest so far measured. extracted electric magnetic form factors provide insight into their exact...
A massive, but light, Abelian U(1) gauge boson is a well-motivated possible signature of physics beyond the standard model particle physics. In this Letter, search for signal such in electron-positron pair production at spectrometer setup A1 Collaboration Mainz Microtron described. Exclusion limits mass range 40 MeV/c2 to 300 MeV/c2, with sensitivity squared mixing parameter as little ε2=8×10−7 are presented. large fraction space has been excluded where discrepancy measured anomalous...
A new exclusion limit for the electromagnetic production of a light $U(1)$ gauge boson ${\ensuremath{\gamma}}^{\ensuremath{'}}$ decaying to ${e}^{+}{e}^{\ensuremath{-}}$ was determined by A1 Collaboration at Mainz Microtron. Such bosons appear in several extensions standard model and are also discussed as candidates interaction dark matter with matter. In electron scattering from heavy nucleus, existing limits narrow state coupling were reduced nearly an order magnitude range lepton pair...
At the Mainz Microtron MAMI, first high-resolution pion spectroscopy from decays of strange systems was performed by electron scattering off a (9)Be target in order to study Λ binding energy light hypernuclei. Positively charged kaons were detected short-orbit spectrometer with broad momentum acceptance at 0° forward angles respect beam, efficiently tagging production strangeness nucleus. Coincidentally, negatively decay pions two independent spectrometers. About 10(3) pionic weak...
We perform a systematic study of the α-particle excitation from its ground state 0_{1}^{+} to 0_{2}^{+} resonance. The so-called monopole transition form factor is investigated via an electron scattering experiment in broad Q^{2} range (from 0.5 5.0 fm^{-2}). precision new data dramatically supersedes that older sets data, each covering only portion range. allow determination two coefficients low-momentum expansion, leading puzzle. By confronting state-of-the-art theoretical calculations, we...
We report on a new experimental method based initial-state radiation (ISR) in e–p scattering, which exploits the radiative tail of elastic peak to study properties electromagnetic processes and extract proton charge form factor (GEp) at extremely small Q2. The ISR technique was implemented an experiment three-spectrometer facility Mainz Microtron (MAMI). This led precise validation corrections far away from line provided first measurements GEp for 0.001≤Q2≤0.004(GeV/c)2.
Abstract We report on a comprehensive reinterpretation of the existing cross-section data for elastic electron-proton scattering obtained by initial-state radiation technique, resulting in significantly improved accuracy extracted proton charge radius. By refining external energy corrections we have achieved an outstanding description radiative tail, essential detailed investigation finite-size effects measured cross sections. This development, together with novel framework determining...
For the first time neutron-rich hydrogen isotope $\rm ^{6}H$ was produced in an electron scattering experiment reaction ^{7}Li(e,~e'p\pi^{+})^{6}H$ using spectrometer facility of A1 Collaboration at Mainz Microtron accelerator. By measuring triple coincidence between scattered electron, proton, and $\pi^{+}$, missing mass spectrum obtained. A clear peak above $^3$H+n+n+n energy threshold seen resulting a ground state $2.3\pm0.5({\rm stat.})\pm0.4({\rm syst.})$ MeV with width $1.9\pm1.0({\rm...
A measurement of beam helicity asymmetries in the reaction 3He(e,e'n)pp has been performed at Mainz Microtron quasielastic kinematics order to determine electric magnetic form factor ratio neutron, GEn/GMn, a four momentum transfer Q2 = 1.58 GeV2. Longitudinally polarized electrons were scattered on highly 3He gas target. The detected with high-resolution spectrometer, and ejected neutrons dedicated neutron detector composed scintillator bars. To reduce systematic errors data taken for...
A Reply to the Comment by J. Arrington.Received 22 June 2011DOI:https://doi.org/10.1103/PhysRevLett.107.119102© 2011 American Physical Society
The PANDA detector at the international accelerator Facility for Antiproton and Ion Research in Europe (FAIR) addresses fundamental questions of hadron physics. Experiments concerning charmonium spectroscopy, search hybrids glueballs interaction hidden open charm particles with nucleons nuclei will be performed antiproton beams impinging on hydrogen or nuclear targets. Cooled allow precision scan resonances formation experiments. momentum range beam between 1.5 GeV/c 15 tests predictions by...
The P̄ANDA experiment at FAIR will use DIRC detectors for the separation of hadrons. compactness detector requires image planes these to be placed inside magnetic field solenoid. Due this and other boundary conditions MCP-PMTs were identified as only suitable photon sensors. Until recently major obstacle an application in high rate experiments like serious aging problems which led damage photo-cathode a fast declining quantum efficiency integrated anode charge (IAC) increased. With new...
We report on the first ${Q}^{2}$-dependent measurement of beam-normal single spin asymmetry ${A}_{n}$ in elastic scattering 570 MeV vertically polarized electrons off $^{12}\mathrm{C}$. cover ${Q}^{2}$ range between 0.02 and $0.05\text{ }\text{ }{\mathrm{GeV}}^{2}/{c}^{2}$ determine at four different values. The experimental results are compared to a theoretical calculation that relates imaginary part two-photon exchange amplitude. result emphasizes behavior given by ratio Compton charge...
The helicity-dependent recoil proton polarizations ${P}_{x}^{\ensuremath{'}}$ and ${P}_{z}^{\ensuremath{'}}$ as well the helicity-independent component ${P}_{y}$ have been measured in $p(\stackrel{\ensuremath{\rightarrow}}{e},{e}^{\ensuremath{'}}\stackrel{\ensuremath{\rightarrow}}{p}){\ensuremath{\pi}}^{0}$ reaction at four-momentum transfer ${Q}^{2}\ensuremath{\simeq}0.1\text{ }\text{ }{\mathrm{GeV}}^{2}$, center-of-mass emission angle...
Cross-section measurements of the exclusive p(e, e′K +)Λ, Σ 0electroproduction reactions have been performed at Mainz Microtron MAMI in A1 spectrometer facility using for first time KAOS kaon detection. These processes were studied a kinematical region not covered by any previous experiment. The nucleon was probed its third-resonance with virtual photons low four-momenta, Q 2 = 0.030–0.055 (GeV/c)2. data indicate smooth transition Q2 from photoproduction to electroproduction cross-sections....