H. Kolanoski
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Cosmology and Gravitation Theories
- Gamma-ray bursts and supernovae
- Computational Physics and Python Applications
- Radiation Detection and Scintillator Technologies
- Pulsars and Gravitational Waves Research
- Black Holes and Theoretical Physics
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Atomic and Subatomic Physics Research
- Medical Imaging Techniques and Applications
- Radio Wave Propagation Studies
- Distributed and Parallel Computing Systems
- Nuclear physics research studies
- Scientific Research and Discoveries
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Muon and positron interactions and applications
Humboldt-Universität zu Berlin
2016-2025
The University of Texas at Arlington
2018-2024
Lawrence Berkeley National Laboratory
2023-2024
University of Alaska Anchorage
2008-2024
Providence College
2008-2024
Clark Atlanta University
2012-2024
Southern University and Agricultural and Mechanical College
2006-2024
Deutsches Elektronen-Synchrotron DESY
1988-2024
TU Dortmund University
1992-2023
CEA Paris-Saclay
2023
The Crystal Ball detector at SPEAR has been used to investigate the decays ψ′→γγJψ, Jψ→(e+e− or μ+μ−) resulting from production of 8×105ψ′. From this selection data we measure branching ratios for processes ψ′→(η π0)Jψ and ψ′→γχ, χ→γJψ. An analysis angular correlations in latter process furnishes measurements χ(3.55) χ(3.51) spins multipole structure radiative transitions.Received 9 December 1981DOI:https://doi.org/10.1103/PhysRevD.25.2259©1982 American Physical Society
Evidence for a new resonance $\ensuremath{\theta}\ensuremath{\rightarrow}\ensuremath{\eta}\ensuremath{\eta}$ in the process $\frac{J}{\ensuremath{\psi}}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\eta}\ensuremath{\eta}$ is presented. The parameters of $\ensuremath{\theta}$ are $M=1640\ifmmode\pm\else\textpm\fi{}50$ MeV and $\ensuremath{\Gamma}={220}_{\ensuremath{-}70}^{+100}$ MeV. ${J}^{\mathrm{PC}}={2}^{++}$ preferred over ${0}^{++}$.
Results from a detailed study using the Crystal Ball detector at SLAC e+e− storage ring SPEAR of inclusive photon spectra 1.8×106 ψ’ and 2.2×106 J/ψ decays are presented. Radiative transitions to χ2,1,0 states observed with energies 126.0±0.2±4, 169.6±0.3±4, 258.4±0.4±4 MeV branching ratios B(ψ’→γχ2,1,0) =(8.0±0.5±0.7)%, (9.0±0.5±0.7)%, (9.9±0.5±0.8)%, respectively. Values for natural linewidths χ obtained: Γ(χ2,1,0)=0.8–4.9, <3.8, 13–21 MeV, respectively (90% C.L.). Improved values found...
From a partial-wave analysis of the $K\overline{K}\ensuremath{\pi}$ system in decay $\frac{J}{\ensuremath{\psi}}\ensuremath{\rightarrow}\ensuremath{\gamma}{K}^{+}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$, it is determined that quantum numbers resonance at 1440 MeV, previously identified as $E(1420)$, are ${J}^{\mathrm{PC}}={0}^{\ensuremath{-}+}$. This new particle has been named $\ensuremath{\iota}$.
We have developed dosemeters based on plastic scintillators for a variety of applications in radiation therapy. The consist basically tissue‐substituting scintillator probe, an optical fiber light guide, and photomultiplier tube. background generated the guide can be compensated by simultaneous measurement from blind fiber. Plastic combine several advantageous properties which render them superior to other dosemeter types many applications: minimal disturbance field because homogeneous...
A search has been made with the Crystal Ball Detector for axionlike particles in radiative $\frac{J}{\ensuremath{\Psi}}$ decays. An upper limit on branching ratio $B(\frac{J}{\ensuremath{\Psi}}\ensuremath{\rightarrow}\ensuremath{\gamma}+a)<1.4\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}$ (90% C.L.) is obtained. This result holds long-lived, noninteracting pseudoscalar or vector of mass less than 1 GeV. Thus, this experiment also places stringent limits existence other possible...
An ${{\ensuremath{\eta}}_{c}}^{\ensuremath{'}}$ candidate state is observed at a mass $M=3592\ifmmode\pm\else\textpm\fi{}5$ MeV and with natural linewidth $\ensuremath{\Gamma}<8$ (95% confidence level), by using the "crystal ball" NaI(Tl) detector Stanford Linear Accelerator Center (SPEAR). The evidence found in inclusive photon spectrum decays of ${\ensuremath{\psi}}^{\ensuremath{'}}(3684)$, where signal corresponding to radiative transition this branching ratio between 0.2% 1.3%...