A5014516351- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- Muon and positron interactions and applications
- Cosmology and Gravitation Theories
- Particle accelerators and beam dynamics
- Radiation Detection and Scintillator Technologies
- COVID-19 epidemiological studies
- Particle Accelerators and Free-Electron Lasers
- Nuclear physics research studies
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Black Holes and Theoretical Physics
- SARS-CoV-2 and COVID-19 Research
- Data-Driven Disease Surveillance
- COVID-19 Pandemic Impacts
- Advanced X-ray and CT Imaging
- Distributed and Parallel Computing Systems
- Vaccine Coverage and Hesitancy
- Superconducting Materials and Applications
University of Victoria
2014-2023
TRIUMF
2013-2022
U.S. National Science Foundation
2021
Expedition (United Kingdom)
2021
University of Virginia
2021
Virginia Department of Health
2021
Tokyo Metropolitan University
2021
Duke University
2018
University of Colorado Boulder
1988-2018
Boston University
2013-2018
This biennial Review summarizes much of particle physics. Using data from previous editions, plus 2658 new measurements 644 papers, we list, evaluate, and average measured properties gauge bosons, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as Higgs heavy neutrinos, supersymmetric particles. All the search limits are listed in Summary Tables. also give numerous tables, figures, formulae, reviews topics Standard Model, detectors, probability,...
The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for pair-produced charged Higgs bosons in the framework of Two Doublet Models (2HDMs). data experiments been statistically combined. results are interpreted within 2HDM Type I II benchmark scenarios. No significant excess has observed when compared to Standard Model background prediction, combined exclude large regions model parameter space. Charged with mass below 80 \({\rm GeV}/c^{2}\) (Type scenario) or 72.5 scenario,...
After a period of rapidly declining U.S. COVID-19 incidence during January-March 2021, increases occurred in several jurisdictions (1,2) despite the rapid rollout large-scale vaccination program. This increase coincided with spread more transmissible variants SARS-CoV-2, virus that causes COVID-19, including B.1.1.7 (1,3) and relaxation prevention strategies such as those for businesses, gatherings, educational activities. To provide long-term projections potential trends cases,...
This biennial Review summarizes much of Particle Physics. Using data from previous editions, plus 2205 new measurements 667 papers, we list, evaluate, and average measured properties gauge bosons, leptons, quarks, mesons, baryons. We also summarize searches for hypothetical particles such as Higgs heavy neutrinos, supersymmetric particles. All the particle search limits are listed in Summary Tables. give numerous tables, figures, formulae, reviews topics Standard Model, detectors,...
Our ability to forecast epidemics far into the future is constrained by many complexities of disease systems. Realistic longer-term projections may, however, be possible under well-defined scenarios that specify state critical epidemic drivers. Since December 2020, U.S. COVID-19 Scenario Modeling Hub (SMH) has convened multiple modeling teams make months ahead SARS-CoV-2 burden, totaling nearly 1.8 million national and state-level projections. Here, we find SMH performance varied widely as a...
During the COVID-19 pandemic, forecasting trends to support planning and response was a priority for scientists decision makers alike. In United States, coordinated by large group of universities, companies, government entities led Centers Disease Control Prevention US Forecast Hub ( https://covid19forecasthub.org ). We evaluated approximately 9.7 million forecasts weekly state-level cases predictions 1–4 weeks into future submitted 24 teams from August 2020 December 2021. assessed coverage...
We present a new high-statistics measurement of the cross section for process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{e}^{+}{e}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ at center-of-mass energy 29 GeV invariant pion-pair masses $M({\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}})$ between 350 MeV/${\mathit{c}}^{2}$ and 1.6 GeV/${\mathit{c}}^{2}$. observe ${f}_{2}(1270)$ measure its radiative width to be...
We have measured the mass of Z boson to be 91.11±0.23 GeV/c2, and its width 1.61+0.60−0.43 GeV. If we constrain visible standard-model value, find partial invisible decay modes 0.62±0.23 GeV, corresponding 3.8±1.4 neutrino species.Received 24 July 1989DOI:https://doi.org/10.1103/PhysRevLett.63.724©1989 American Physical Society
Multihadronic e+e− annihilation events at a center-of-mass energy of 29 GeV have been studied with both the original (PEP 5) Mark II and upgraded detectors. Detector-corrected distributions from global shape analyses such as aplanarity, Q2-Q1, sphericity, thrust, minor value, oblateness, jet masses, inclusive charged-particle including x, rapidity, p⊥, particle flow are presented. These compared predictions various multihadron event models which use leading-logarithmic shower evolution or...
In Spring 2021, the highly transmissible SARS-CoV-2 Delta variant began to cause increases in cases, hospitalizations, and deaths parts of United States. At time, with slowed vaccination uptake, this novel was expected increase risk pandemic resurgence US summer fall 2021. As part COVID-19 Scenario Modeling Hub, an ensemble nine mechanistic models produced 6-month scenario projections for July-December 2021 These estimated substantial resurgences across resulting from more variant, projected...
The branching ratios for ${\ensuremath{\tau}}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\nu}}_{\ensuremath{\tau}}$ and ${\ensuremath{\tau}}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}(n{\ensuremath{\pi}}^{0}){\ensuremath{\nu}}_{\ensuremath{\tau}}$, $n>~1$, have been measured to be 0.078...
Hadronic event shape distributions from e+e− annihilation measured by the OPAL experiment at centre-of-mass energies between 91 GeV and 209 are used to determine strong coupling α S. The results based on QCD predictions complete next-to-next-to-leading order (NNLO), NNLO calculations matched resummed next-to-leading-log-approximation terms (NNLO + NLLA). combined result all variables is while NLLA completeness of with respect missing higher contributions, studied varying renormalization...
A search for stable and long-lived massive particles of electric charge |Q/e|=1 or fractional charges 2/3, 4/3, 5/3 is reported using data collected by the OPAL detector at LEP, centre-of-mass energies from 130 to 209 GeV. These are assumed be pair-produced in e+e− collisions not interact strongly. No evidence production these was observed. Model-independent upper limits on cross-section between 0.005 0.028 pb have been derived scalar spin-1/2 with ±1. Within framework Constrained Minimal...