Richard Wilson
A5112580199- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- International Law and Human Rights
- Legal Education and Practice Innovations
- Global Peace and Security Dynamics
- Nuclear Physics and Applications
- Particle Accelerators and Free-Electron Lasers
- Dark Matter and Cosmic Phenomena
- Nuclear physics research studies
- Atomic and Subatomic Physics Research
- Torture, Ethics, and Law
- Artificial Intelligence in Law
- Comparative and International Law Studies
- Atomic and Molecular Physics
- Muon and positron interactions and applications
- Particle accelerators and beam dynamics
- Human Rights and Development
- International Law and Aviation
- Neutrino Physics Research
- Nuclear and radioactivity studies
- Medical Malpractice and Liability Issues
- Radiomics and Machine Learning in Medical Imaging
- Historical and Contemporary Political Dynamics
- Cancer, Lipids, and Metabolism
Towson University
2024
Oxford University Press (United Kingdom)
2023
Queen's University Belfast
2023
Belfast City Hospital
2023
University of Ulster
2023
Missouri University of Science and Technology
2023
Center for Cancer Research
2023
University of California, Riverside
2021
MetroHealth
2021
Cleveland FES Center
2021
The charge and magnetic form factors, G/sub E/(q/sup 2/) M/(q/ sup 2/), are discussed with emphasis on their use in electron-nucleon experiments. Electron-proton scattering proton-antiproton annihllation the appropriate factors. Neutron factors also given. (R.E.U.)
Abstract Here the influence of annealing on operational efficiency all‐polymer solar cells based blends polymers poly(3‐hexylthiophene) (P3HT) and poly((9,9‐dioctylfluorene)‐2,7‐diyl‐alt‐[4,7‐bis(3‐hexylthiophen‐5‐yl)‐2,1,3‐benzothiadiazole]‐2′,2″‐diyl) (F8TBT) is investigated. Annealing completed devices found to result in an increase power conversion from 0.14 1.20%, while films prior top electrode deposition increases device only 0.19% due a lowering open‐circuit voltage short‐circuit...
The authors report efficient photovoltaic diodes which use poly((9,9-dioctylfluorene)-2,7-diyl-alt-[4,7-bis(3-hexylthien-5-yl)-2,1,3-benzothiadiazole]-2′,2″-diyl) (F8TBT) both as electron acceptor, in blends with poly(3-hexylthiophene), and hole (6,6)-phenyl C61-butyric acid methyl ester. In cases external quantum efficiencies of over 25% are achieved, a power conversion efficiency 1.8% under simulated sunlight for optimized F8TBT/poly(3-hexylthiophene) devices. ambipolar nature F8TBT is...
The proton and deuteron structure functions F2p F2d are measured in inelastic muon scattering with an average beam energy of 470 GeV. data were taken at Fermilab experiment E665 during 1991 1992 using liquid hydrogen deuterium targets. F2 measurements reported the range 0.0008<x<0.6 0.2<Q2<75 GeV2. These first precise low x Q2 data. In high where they overlap from NMC, two agreement. also DESY HERA data, there is a smooth connection between sets. At consistent QCD-evolved leading twist...
We report the first evidence of charmless semileptonic decays B mesons. In momentum interval 2.4–2.6 GeV/c where background from b→clν is negligible, average measured b→ueν and b→uμν partial branching ratios ΔBub(2.4,2.6) =(1.8±0.4±0.3)×10−4. Inclusion data 2.2–2.4 GeV/c, lepton yield dominated by b→clν, gives ΔBub(2.2,2.6) =(3.3±0.8±0.8)×10−4. ‖Vub/Vcb‖ depends on theoretical model b→ulν decay approximately 0.1.Received 8 November 1989DOI:https://doi.org/10.1103/PhysRevLett.64.16©1990...
We have measured the total cross section for electron-positron annihilation into three or more hadrons, with at least two charged particles in final state. The measurement was made a center-of-mass energy of 4 GeV $2\ensuremath{\pi}\ensuremath{-}\mathrm{s}\mathrm{r}$ nonmagnetic detector. With 88 events detected, we obtain model-independent lower limit on hadron production 9.6 \ifmmode\pm\else\textpm\fi{} 1.4 nb; calculation detection efficiency based invariant phase-space pions leads to 26...
We report thin-film morphology studies of inkjet-printed single-droplet organic transistors (OTFTs) using angle-dependent polarized Raman spectroscopy. show this to be an effective technique determine the degree molecular order as well spatially resolve orientation conjugated backbones 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-Pentacene) molecules. The addition insulating polymer, polystyrene (PS), does not disrupt π-π stacking TIPS-Pentacene Blending in fact improves uniformity and...
The polarization and differential cross section of 146-Mev protons elastically scattered by deuterons have been measured in the center-of-mass angular range from 3.9\ifmmode^\circ\else\textdegree\fi{} to 170\ifmmode^\circ\else\textdegree\fi{}. A description liquid deuterium target detection apparatus which permitted measurement elastic events over these angles is given. At small proton was energy analyzed; at large recoil partner proton, deuteron, identified analyzed. Although resolution...
Across Guatemala, Mayan peoples are struggling to recover from decades of cataclysmic upheaval--religious conversions, civil war, displacement, military repression. Richard Wilson carried out long-term research with Q'eqchi'-speaking Mayas in the province Alta Verapaz ascertain how these events affected social organization and identity. He finds that their rituals fertility healing--abandoned 1970s during Catholic Protestant evangelizations--have been reinvented by an ethnic revivalist...
We have measured ${B}^{0}$B${\ifmmode\bar\else\textasciimacron\fi{}}^{0}$ mixing by observing like-sign dilepton events in \ensuremath{\Upsilon}(4S) decay. Assuming that the semileptonic branching fractions of charged and neutral B mesons are equal decays to ${B}^{+}$${B}^{\mathrm{\ensuremath{-}}}$ 55% time 45% time, we measure parameter r be 0.19\ifmmode\pm\else\textpm\fi{}0.06\ifmmode\pm\else\textpm\fi{}0.06, where first error is statistical second systematic.
A fourth state in the upsilon energy region has been seen ${e}^{+}{e}^{\ensuremath{-}}$ collisions at Cornell Electron Storage Ring. resonance is observed with a mass 1112\ifmmode\pm\else\textpm\fi{}5 MeV above lowest state. The 9.6-MeV rms width greater than 4.6-MeV resolution of beams. characteristics new make it likely candidate for $4^{3}S$ $b\overline{b}$ system, lying threshold production $B$ mesons.
We have used the momentum spectrum of leptons produced in semileptonic $B$-meson decays to set a 90%-confidence-level upper limit on $\frac{\ensuremath{\Gamma}(b\ensuremath{\rightarrow}\mathrm{ul}\ensuremath{\nu})}{\ensuremath{\Gamma}(b\ensuremath{\rightarrow}\mathrm{cl}\ensuremath{\nu})}$ 4%. also measure branching fractions $B$ meson be (12.0\ifmmode\pm\else\textpm\fi{}0.7\ifmmode\pm\else\textpm\fi{}0.5)% for electrons and (10.8\ifmmode\pm\else\textpm\fi{}0.6\ifmmode\pm\else\textpm\fi{}1.0)% muons.
Three narrow resonances have been observed in ${e}^{+}{e}^{\ensuremath{-}}$ annihilation into hadrons at total energies between 9.4 and 10.4 GeV. Measurements of mass spacing ratios lepton pair widths support the interpretation these "$\ensuremath{\Upsilon}$" states as lowest triplet-$S$ levels $b\overline{b}$ quark-antiquark system.
Elastic electron-proton scattering cross sections were measured at backward angles (80\ifmmode^\circ\else\textdegree\fi{}-90\ifmmode^\circ\else\textdegree\fi{}) in the laboratory for four-momentum transfers between 7 ${\mathrm{F}}^{\ensuremath{-}2}$ and 45 ${\mathrm{F}}^{\ensuremath{-}2}$. Experimental errors range from 3.1% to 5.3%, including a systematic error estimated be 1.9% added quadrature. Electric magnetic form factors are computed all recent data this ${q}^{2}$ range, with...
Measurements of the ${e}^{+}{e}^{\ensuremath{-}}$ cross section above $B\overline{B}$ threshold are reported. Structures observed which could be $\ensuremath{\Upsilon}(5S)$ and $\ensuremath{\Upsilon}(6S)$ resonances. The masses widths given compared with various potential-model predictions. Average charged multiplicities inclusive lepton yields also presented.
$B$-meson decays to final states consisting of a ${D}^{0}$ or ${D}^{*\ifmmode\pm\else\textpm\fi{}}$ and one two charged pions have been observed. The charged-$B$ mass is 5270.8 \ifmmode\pm\else\textpm\fi{} 2.3 2.0 MeV the neutral-$B$ 5274.2 1.9 MeV.
All available elastic electron-proton and quasielastic electron-neutron cross sections are analyzed assuming one-photon exchange. The model in which the form factors caused entirely by vector mesons is discussed. A good fit cannot be obtained $\ensuremath{\rho}$, $\ensuremath{\omega}$, $\ensuremath{\varphi}$ alone. An acceptable with an additional ${\ensuremath{\rho}}^{\ensuremath{'}}$ meson Possible connections $\mathrm{pp}$ scattering also
Measurements have been made of the polarization and differential cross section in elastic $p\ensuremath{-}\ensuremath{\alpha}$ scattering at 147 66 Mev, laboratory angular ranges 2\ifmmode^\circ\else\textdegree\fi{}-165\ifmmode^\circ\else\textdegree\fi{} 10\ifmmode^\circ\else\textdegree\fi{}-45\ifmmode^\circ\else\textdegree\fi{}, respectively. These compared with recent calculations which relate amplitudes to nucleon-nucleon results. Because these take into account variation amplitudes,...
The depolarization in proton-proton scattering at 142 Mev was measured angles from 6\ifmmode^\circ\else\textdegree\fi{} to 40\ifmmode^\circ\else\textdegree\fi{} the laboratory system.The measurements were made by a 67% polarized proton beam first off liquid hydrogen target, then carbon (or lithium) analyzer. scattered protons detected plastic scintillation counters, and asymmetries last each angle. angular dependence of determined this work similar that 315 other workers. data disagree with...