A5002996692- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Neutrino Physics Research
- Nuclear physics research studies
- Radiation Detection and Scintillator Technologies
- Medical Imaging Techniques and Applications
- Astrophysics and Cosmic Phenomena
- Nuclear reactor physics and engineering
- Atomic and Molecular Physics
- Atomic and Subatomic Physics Research
- Black Holes and Theoretical Physics
- Distributed and Parallel Computing Systems
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Quantum, superfluid, helium dynamics
- Nuclear Physics and Applications
- Advanced Chemical Physics Studies
- Particle accelerators and beam dynamics
- Ion-surface interactions and analysis
- Mass Spectrometry Techniques and Applications
Weizmann Institute of Science
2018-2024
University of California, Santa Cruz
2023-2024
Indian Institute of Technology Indore
2015-2024
National Central University
2019-2024
Institute for High Energy Physics
2023-2024
University of Geneva
2023-2024
Institute of Science and Technology
2023-2024
Institut National de Physique Nucléaire et de Physique des Particules
2022-2024
Ben-Gurion University of the Negev
2019-2024
Université Savoie Mont Blanc
2022-2024
The photoproduction of $\ensuremath{\omega}$ mesons on nuclei has been investigated using the Crystal Barrel/TAPS experiment at ELSA tagged photon facility in Bonn. aim is to study possible in-medium modifications meson via reaction $\ensuremath{\gamma}+A\ensuremath{\rightarrow}\ensuremath{\omega}+X\ensuremath{\rightarrow}{\ensuremath{\pi}}^{0}\ensuremath{\gamma}+{X}^{\ensuremath{'}}$. Results obtained for Nb are compared a reference measurement ${\mathrm{LH}}_{2}$ target. While recoiling,...
Exclusive and kinematically complete high-statistics measurements of quasifree polarized $\stackrel{\ensuremath{\rightarrow}}{n}p$ scattering have been performed in the energy region narrow resonancelike structure ${d}^{*}$ with $I({J}^{P})=0({3}^{+})$, $M\ensuremath{\approx}2380\text{ }\text{ }\mathrm{MeV}$, $\mathrm{\ensuremath{\Gamma}}\ensuremath{\approx}70\text{ }\mathrm{MeV}$ observed recently double-pionic fusion channels...
Total and differential cross sections for η η′photoproduction off the proton have been determined with CBELSA/TAPS detector photon energies between 0.85 2.55 GeV. The mesons are detected in their two neutral decay modes, η→γγ η→3π0→6γ, first time, cover full angular range cosθc.m. of meson. These new photoproduction data consistent earlier CB-ELSA results. η′ observed to π0π0η→6γ also extend coverage range.8 MoreReceived 8 September 2009DOI:https://doi.org/10.1103/PhysRevC.80.055202©2009...
Quasifree photoproduction of eta mesons off nucleons bound in the deuteron has been measured with CBELSA/TAPS detector for incident photon energies up to 2.5 GeV at Bonn ELSA accelerator. The have detected coincidence recoil protons and neutrons, which allows a detailed comparison quasifree n(gamma,eta)n p(gamma,eta)p reactions. excitation function production neutron shows pronounced bumplike structure W=1.68 (E{gamma} approximately 1 GeV), is absent proton.
The photoproduction of \eta'-mesons off different nuclei has been measured with the CBELSA/TAPS detector system for incident photon energies between 1500 - 2200 MeV. transparency ratio deduced and compared to theoretical calculations describing propagation in nuclei. comparison indicates a width \eta' -meson order \Gamma= 15-25 MeV at \rho =\rho_0 an average momentum p_{\eta'} = 1050 MeV/c, which \eta'-meson is produced nuclear rest frame. inelastic N cross section estimated be 3 10 mb....
New data on quasifree polarized neutron-proton scattering in the region of recently observed ${d}^{*}$ resonance structure are obtained by exclusive and kinematically complete high-statistics measurements with WASA at COSY. This paper details determination beam polarization, checks character process, all ${A}_{y}$ angular distributions new partial-wave analysis, which includes producing a pole ${}^{3}{D}_{3}\ensuremath{-}{}^{3}{G}_{3}$ coupled partial waves...
Exclusive measurements of the quasi-free $np \to np\pi^0\pi^0$ reaction have been performed by means $dp$ collisions at $T_d$ = 2.27 GeV using WASA detector setup COSY. Total and differential cross sections obtained covering energy region $\sqrt s$ (2.35 - 2.46) GeV, which includes ABC effect its associated $d^*(2380)$ resonance. Adding $d^*$ resonance amplitude to that for conventional processes leads a reasonable description data. The observed in total section is agreement with predictions...
Droplets that impact the surface of a deep liquid pool may form vertical jet after cavity formation event, provided they have sufficient energy. Depending on associated time scales and effect Rayleigh Plateau instability, this either continue to rise, or satellite droplets via necking. Collision these structures with second incoming droplet, ejected from same dispensing tip as first result in various lamellar patterns, depending conditions, giving rise mushroom umbrella structures. In...
We report the formation of H3+ by proton coagulation in methanol under impact low energy Ar(8+) projectiles. Our time-of-flight coincidence measurements with CH3OD establish that arises from intramolecular bond rearrangement methyl group. have performed ab initio quantum chemical calculations show preferred pathway for C-H3 cleavage. Fragmentation organic molecules like highly charged ions is suggested as an alternative mechanism outer space.
The importance of non-Watson-Crick base pairs in the three-dimensional structure RNA is now well established. and stability these noncanonical are, however, poorly understood. We have attempted to understand structural features 33 frequently occurring using density functional theory. These are three types, namely (i) those stabilized by two or more polar hydrogen bonds between bases, (ii) having one another C-H...O/N type interactions, (iii) H-bond bases involving sugars linked bases. found...
This report, prepared for the Community Planning Study - Snowmass 2013 summarizes theoretical motivations and experimental efforts to search baryon number violation, focussing on nucleon decay neutron-antineutron oscillations. Present future experiments using large underground detectors, as well planned oscillation with free neutron beams are highlighted.
The differential cross sections and unpolarized spin-density matrix elements for the reaction γp→pω were measured using CBELSA/TAPS experiment initial photon energies ranging from threshold to 2.5 GeV. These observables radiative decay of ω meson, ω→π0γ. cover full angular range show extent t-channel forward rise. overall shape distributions in are fair agreement with previous data. In addition, first time, a beam linearly-polarized tagged photons energy 1150 MeV 1650 was used extract...
Abstract We report on the first observation of electroluminescence amplification with a MicroStrip Plate immersed in liquid xenon. The liquid, induced by alpha-particles, was observed an intense non-uniform electric field vicinity 8-μm narrow anode strips interlaced wider cathode ones, deposited same side glass substrate. yield reached value (35.5 ± 2.6) VUV photons/electron. propose ways enhancing this response more appropriate microstructures towards their potential incorporation as...
Quasi-free photoproduction of $\eta '$ mesons off nucleons bound in the deuteron has been measured with combined Crystal Barrel - TAPS detector. The experiment was done at a tagged photon beam ELSA electron accelerator Bonn for incident energies from production threshold up to 2.5 GeV. '$-mesons have detected coincidence recoil protons and neutrons. quasi-free proton data are good agreement results free protons, indicating that nuclear effects no significant impact. neutrons provides first...
Exclusive and kinematically complete measurements of the double pionic fusion to ${}^{3}\mathrm{He}$ have been performed in energy region so-called ABC effect, which denotes a pronounced low-mass enhancement $\ensuremath{\pi}\ensuremath{\pi}$-invariant mass spectrum. The experiments were carried out with WASA detector setup at COSY (the cooler synchrotron Forschungszentrum J\"ulich). Similar observations basic $pn\ensuremath{\rightarrow}d{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0}$ reaction...
Here, we have investigated some physicochemical parameters to understand the molecular interactions by means of density (ρ) measurement, measurement viscosity (η), refractive index(nD) and conductance surface tension measurements between two significant aqueous ionic liquid solutions: benzyl trimethyl ammonium chloride (BTMAC) triethyl (BTEAC) in an l-methionine (amino acid) solution. The apparent molar volume (Φv), coefficient (B), refraction (RM) been used analyze interaction behavior...