K. P. Schüler
A5029843742- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Advanced NMR Techniques and Applications
- Particle Accelerators and Free-Electron Lasers
- Particle Detector Development and Performance
- Muon and positron interactions and applications
- Superconducting Materials and Applications
- Dark Matter and Cosmic Phenomena
- Particle accelerators and beam dynamics
- Nuclear physics research studies
- Electron and X-Ray Spectroscopy Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Radiation Therapy and Dosimetry
- Radiation Detection and Scintillator Technologies
- Atomic and Molecular Physics
- Magnetic confinement fusion research
- Neutrino Physics Research
- Calibration and Measurement Techniques
- Photocathodes and Microchannel Plates
- Laser-Plasma Interactions and Diagnostics
Physikalisch-Technische Bundesanstalt
2023-2024
National Institute of Standards and Technology
2023
Material Measurement Laboratory
2023
Hamburg Institut (Germany)
2009-2016
University of the Basque Country
2014
Health and Education Research Management and Epidemiologic Services (United States)
2001-2014
Hermes Arzneimittel (Germany)
2001-2014
Ikerbasque
2014
Peking University
2003-2010
University of Regensburg
2001-2010
Spin-dependent asymmetries have been measured in inclusive deep-inelastic scattering of longitudinally polarized electrons by protons. Data were obtained at a angle 10\ifmmode^\circ\else\textdegree\fi{} and for incident energies 16.2 22.7 GeV, which cover the kinematic range $0.18<x<0.70$ $3.5<{Q}^{2}<10.0$ (${\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^{2}$. The present results provide test scaling Bjorken Ellis-Jaffe sum rules are compared with various models proton spin structure.
We report measurements of the asymmetry in deep inelastic scattering longitudinally polarized electrons by protons. The antiparallel-parallel asymmetries are positive and large agreement with predictions quark-parton models proton. A limit is obtained on parity nonconservation unpolarized nucleons.
We report new measurements of the asymmetry in deep-inelastic scattering longitudinally polarized electrons by protons kinematic range $2<~\ensuremath{\omega}<~10$, $1<~{Q}^{2}<~4$ ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^{2}$, and $2<~W<~4$ GeV. compare our results with Bjorken sum rule several theoretical models internal spin structure proton.
High energy photon colliders (γγ,γe) are based on e - linear where high photons produced using Compton scattering of laser light electrons just before the interaction point. This paper is a part Technical Design Report collider TESLA. 1 Physics program, possible parameters and some technical aspects at TESLA discussed.
We report on a new type of high-energy electron-proton scattering experiment in which longitudinally polarized electrons are scattered from protons. The asymmetry elastic at ${Q}^{2}=0.765$ ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^{2}$ was measured; our result agrees with the theoretical and determines sign $\frac{{G}_{E}}{{G}_{M}}$ to be positive.
Beam-helicity and beam-charge asymmetries in the hard exclusive leptoproduction of real photons from an unpolarised hydrogen target by a 27.6 GeV lepton beam are extracted HERMES data set 2006-2007 using missing-mass event selection technique. The asymmetry amplitudes this more precise than those earlier 1996-2005 previously analysed same manner HERMES. results two sets compatible with each other. Results these combined constitute most amplitude measurements made kinematic region
The ratio of cross sections for inelastic muon scattering on xenon and deuterium nuclei was measured at very low Bjorken x (0.000 02${\mathit{x}}_{\mathrm{Bj}}$0.25). data were taken Fermilab experiment E-665 with a 490 GeV/c beam incident liquid gaseous targets. Two largely independent analysis techniques gave statistically consistent results. xenon-to-deterium per-nucleon cross-section is constant approximately 0.7 ${\mathit{x}}_{\mathrm{Bj}}$ below 0.003.
The longitudinal polarization of the new Yale University-Stanford Linear Accelerator Center polarized-electron beam has been determined at laboratory energies between 6.47 and 19.40 GeV. Spin-dependent elastic electron-electron scattering (M\o{}ller scattering) found to be a practical technique for measurements high energies. results are consistent with energy angular dependence predicted by quantum electrodynamics an energy-independent 0.76\ifmmode\pm\else\textpm\fi{}0.03.
Nuclear transparencies measured in exclusive incoherent ${\mathrm{\ensuremath{\rho}}}^{0}$ meson production from hydrogen, deuterium, carbon, calcium, and lead muon-nucleus scattering are reported. The data were obtained with the E665 spectrometer using Fermilab Tevatron muon beam a mean energy of 470 GeV. Increases nuclear observed as virtuality photon increases, qualitative agreement expectations color transparency.
An experiment (E166) at the Stanford Linear Accelerator Center has demonstrated a scheme in which multi-GeV electron beam passed through helical undulator to generate multi-MeV, circularly polarized photons were then converted thin target produce positrons (and electrons) with longitudinal polarization above 80% 6 MeV. The results are agreement Geant4 simulations that include dominant polarization-dependent interactions of electrons, positrons, and matter.Received 8 March...
Results on forward charged hadrons in 490 GeV deep-inelastic muon scattering are presented. The transverse momenta, azimuthal asymmetry, and energy flow of events with four or more studied. range the invariant hadronic mass squared 300<W2<900 GeV2/c4 extends higher than previous experiments. Data compared to predictions Lund Monte Carlo model perturbative QCD simulated by matrix elements, parton showers, color dipole radiation. All QCD-based models consistent data while a without processes...
The ratio of the deuteron to proton structure functions is measured at very small Bjorken $x$ (down 1${0}^{--6}$) and for ${Q}^{2}>0.001$ Ge${\mathrm{V}}^{2}$ from scattering 470 GeV muons on liquid hydrogen deuterium targets. ${F}_{2}^{n}{/F}_{2}^{p}$ extracted these measurements found be constant, a value $0.935\ifmmode\pm\else\textpm\fi{}0.008\ifmmode\pm\else\textpm\fi{}0.034$, $x<0.01$. This result suggests presence nuclear shadowing effects in deuteron. dependence ${Q}^{2}$ also...