A5069324261- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Advanced Radiotherapy Techniques
- Radiation Therapy and Dosimetry
- Radiation Detection and Scintillator Technologies
- Superconducting Materials and Applications
- Computational Physics and Python Applications
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Radiation Effects in Electronics
- Radiation Dose and Imaging
- Cosmology and Gravitation Theories
- Advanced X-ray and CT Imaging
- Particle accelerators and beam dynamics
- Gas Sensing Nanomaterials and Sensors
- Solar and Space Plasma Dynamics
- Plasma Diagnostics and Applications
- Advanced Algorithms and Applications
- Environmental Impact and Sustainability
- CCD and CMOS Imaging Sensors
Mindanao State University – Iligan Institute of Technology
2001-2024
Florida Atlantic University
2012-2014
Mindanao State University
2007-2014
University of Bucharest
2012
Regional Cancer Center
2012
Rutgers, The State University of New Jersey
1990-1992
University of the Philippines System
1990-1992
Louisiana State University Agricultural Center
1989
Louisiana State University System
1989
Louisiana State University
1988-1989
We present the general properties of multihadron final states produced by e+e− annihilation at center-of-mass energies from 52 to 57 GeV in AMY detector KEK collider TRISTAN. Global shape, inclusive charged-particle, and particle-flow distributions are presented. Our measurements compared with QCD+fragmentation models that use either leading-logarithmic parton-shower evolution or QCD matrix elements parton level, string cluster fragmentation for hadronization.Received 20 November...
The ratio $R$ of the cross section for ${e}^{+}{e}^{\ensuremath{-}}$ annihilation into hadronic final states to QED muon-pair production is measured be 4.34\ifmmode\pm\else\textpm\fi{}0.45\ifmmode\pm\else\textpm\fi{}0.30 and 4.23\ifmmode\pm\else\textpm\fi{}0.20\ifmmode\pm\else\textpm\fi{}0.21 at c.m. energies 50 52 GeV, respectively. From these values an analysis event shapes we deduce a 95%-confidence-level upper limit rate new heavy charge $+\frac{2}{3}e$ or $\ensuremath{-}\frac{1}{3}e$...
We present evidence for the non-Abelian nature of QCD from a study multijet events produced in ${e}^{+}$${e}^{\mathrm{\ensuremath{-}}}$ annihilations \ensuremath{\surd}s =50 to 57 GeV AMY detector at KEK storage ring TRISTAN. A comparison three-jet event fraction TRISTAN DESY PETRA shows that coupling strength ${\ensuremath{\alpha}}_{s}$ decreases with increasing ${Q}^{2}$. In addition, measurements angular distributions four-jet show triple-gluon vertex.
We present the charged-particle multiplicity distributions for ${e}^{+}{e}^{\ensuremath{-}}$ annihilation at center-of-mass energies from 50 to 61.4 GeV. The results are based on a data sample corresponding total integrated luminosity of 30 ${\mathrm{pb}}^{\ensuremath{-}1}$ obtained with AMY detector KEK storage ring TRISTAN. deviate significantly modified Poisson and pair distributions, but follow Koba-Nielsen-Olesen scaling well reproduced by LUND parton-shower model.
Three-jet events produced in ${e}^{+}$${e}^{\mathrm{\ensuremath{-}}}$ annihilations are used to provide comparisons between quark and gluon jets. Differences quark-induced gluon-induced jets observed. Quark tend have a more tightly collimated structure than jets, which is reflected the concentration of larger fraction jet's energy near jet axis.
The total cross section for e+e− annihilation into hadrons has been measured CM energies ranging from 50 to 57 GeV. We fit the predictions of standard model these measurements and those at lower energies. mass Z0 boson, MZ, QCD scale parameter, ΛMS, are derived fit. results MZ=88.6−1.8+2.0 GeV/c2, ΛMS=0.15−0.11+0.16
Multihadronic ${e}^{+}{e}^{\ensuremath{-}}$ annihilation events containing final-state leptons have been investigated with a 4.7-${\mathrm{pb}}^{\ensuremath{-}1}$ data sample at c.m. energies of 50 and 52 GeV. The number low-thrust ($T\ensuremath{\le}0.8$) isolated is consistent the expectation standard model five quark flavors. Limits on production new quarks are reported.
The ratio $R$ of the total cross section for ${e}^{+}{e}^{\ensuremath{-}}$ annihilation into hadrons to lowest-order QED ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ has been measured center-of-mass energies ranging from 50 61.4 GeV. If we allow an overall shift ---4.9%, about 1.5 times our estimated normalization error, results are consistent with standard-model predictions.
In Monte Carlo simulations, the fine-tuning of linac beam parameters to produce a good match between simulated and measured dose profiles is lengthy, time-consuming resource-intensive process. The objective this study utilize results gamma-index analysis toolkit embedded inside windows-based PRIMO software package yield truncated photon process.Using version 0.1.5.1307, Varian Clinac 2100 at two nominal energy configurations 6 MV 10 for varying number histories from 106 more than 108....
By studying ${e}^{+}$${e}^{\mathrm{\ensuremath{-}}}$ annihilations in the center-of-mass energy range between 50 and 60.8 GeV, we have established a 95%-confidence-level lower limit on mass of fourth-generation charge -(1/3 quark b' 27.2 GeV. In contrast with all previous searches, this has been obtained through consideration decay processes b'\ensuremath{\rightarrow}b\ensuremath{\gamma} b'\ensuremath{\rightarrow}bg aswell as...
Using 123 multihadronic inclusive muon-production ${e}^{+}$${e}^{\mathrm{\ensuremath{-}}}$ annihilation events at an average c.m. energy of 55.2 GeV, we extracted the forward-backward charge asymmetry ${e}^{+}$${e}^{\mathrm{\ensuremath{-}}}$\ensuremath{\rightarrow}bb\ifmmode\bar\else\textasciimacron\fi{} process and R ratio for bb\ifmmode\bar\else\textasciimacron\fi{} production. We used analysis method in which behavior c quark lighter quarks is assumed, with only that b left indeterminate....
The forward-backward asymmetry of quarks produced in ${e}^{+}$${e}^{\mathrm{\ensuremath{-}}}$ annihilations, summed over all flavors, is measured at \ensuremath{\surd}s between 50 and 60.8 GeV. Methods determining the charge direction jet pairs are discussed. found to agree with five-flavor standard model.
A search for pair production of fourth-generation sequential leptons in ${e}^{+}{e}^{\ensuremath{-}}$ annihilation at a center-of-mass energy $\sqrt{s}=56$ GeV is reported. Event topologies corresponding to the cases where one particle decays leptonically while other hadronically as well those both particles decay were explored. We set 95%-confidence-level lower limit 27.6 GeV/${\mathit{c}}^{2}$ mass lepton.
A search for unstable heavy neutral leptons has been made at center-of-mass energies from 50 to 60.8 GeV with the AMY detector KEK Storage ring TRISTAN. The are assumed decay via mixing electrons and muons. Events two were searched for. No evidence their existence was found. Limits in mass range \ensuremath{\le}28.1 GeV/${c}^{2}$ mixing-parameter...