A5050181409- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Nuclear physics research studies
- Particle Accelerators and Free-Electron Lasers
- High-Energy Particle Collisions Research
- Superconducting Materials and Applications
- Nuclear Physics and Applications
- Terahertz technology and applications
- Spectroscopy and Laser Applications
- Superconducting and THz Device Technology
- Geophysics and Gravity Measurements
- Atomic and Molecular Physics
- Securities Regulation and Market Practices
- Scientific Research and Discoveries
- Semiconductor Quantum Structures and Devices
- Parallel Computing and Optimization Techniques
- Plasmonic and Surface Plasmon Research
- Geomagnetism and Paleomagnetism Studies
- Physics of Superconductivity and Magnetism
- Electron and X-Ray Spectroscopy Techniques
- Particle accelerators and beam dynamics
- Advanced X-ray Imaging Techniques
- Distributed and Parallel Computing Systems
- Medical Imaging Techniques and Applications
- Gamma-ray bursts and supernovae
Lebanese University
2013-2022
Institut de Physique
1995-2008
Institut National de Physique Nucléaire et de Physique des Particules
1995-2008
We present new $\ensuremath{\Sigma}$ beam asymmetry data for $\ensuremath{\eta}$ meson photoproduction on the proton, using a novel tagged, laser backscattered, linearly polarized photon up to 1.1 GeV. The show large, positive asymmetries, at all incident energies. In addition ${S}_{11}(1535)$ and ${D}_{13}(1520)$ resonances necessary reproduce cross sections, ${P}_{13}(1720)$ ${D}_{15}(1675)$ ``four stars'' contribute observable, but cannot strong forward asymmetries measured energies...
The analysis of the γp→ηπ0p reaction has been performed using data from GRAAL experiment. total and differential cross sections beam asymmetry have obtained threshold up to 1.5 GeV energy. two resonances S11(1535) Δ(1700) are expected be excited in intermediate states this reaction. results used test predictions based on assumption that both dynamically generated meson-baryon interaction provided by chiral Lagrangians. term involving excitation, followed decay into ηΔ(1232), is found...
We present new break-up and coherent data for $\ensuremath{\eta}$ meson photoproduction on the deuteron, using a deuterium target tagged bremsstrahlung photons up to 1 GeV. The differential cross sections process were measured from threshold 800 MeV. They are much smaller than those previously reported. channel provides direct measurement of neutron proton section ratios. At ${S}_{11}(1535)$ resonance peak,...
The photoproduction of the omega meson has been studied at GRAAL from threshold up to a photon energy 1.5 GeV. differential cross sections and beam asymmetries have measured precisely all angles. total section is also obtained. Systematic enhancements large angles nonzero intermediate provide clear evidence for s- u-channel resonant processes. data are compared results hadron quark models.
Financial markets in Lebanon are constrained by government influence, Islamic financial principles, and some barriers to foreign participation. Productivity the Lebanese sector ranks below its occidental counterpart spite fact that regulatory, supervisory, accounting standards generally consistent with international norms. This paper aims give reasons recommendations of failure applying optimal management information system Sector. Our results show include among others systems it selves,...
Terahertz (THz) plasma oscillation in n + nn InGaAs vertical diodes is studied by using a numerical approach based on the hydrodynamic (HD) equations. The 1D HD model coupled to Poisson equation. We simulate diode response optical excitation of waves at room temperature. Our results clearly show presence 3D resonances THz frequency domain. selection appropriately shaped pulses helps realization detected frequency. investigation completed introducing stochastic perturbations according Langevin
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation B. Saghai, F. Tabakin, J. Ajaka, P. Hoffmann-Rothe; η-meson photoproduction dynamics missing resonances. AIP Conf. Proc. 20 May 1997; 412 (1): 567–569. https://doi.org/10.1063/1.54349 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search...
We use a hydrodynamic model self-consistently coupled to 1D Poisson solver simulate the excitation by optical beating as well electrical perturbation of plasma waves in n <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">+</sup> nn InGaAs diodes at room temperature. calculate electric field response and velocity carriers middle diode regions. Our results show clearly presence three-dimensional resonances terahertz frequency domain for two region...
Since 1996 the GRAAL experiment is running at ESRF, using a linearly polarized photon beam produced by backscattering laser on electron in storage ring. A liquid hydrogen target and large acceptance detector are used. All sizeable photoproduction reactions measured analyzed. We present results of η meson, one two pions, ω photoproduction, which partly published or still preliminary. Predictions fits these data theoretical models given.