Catherine Jones
A5068367011- Quantum Chromodynamics and Particle Interactions
- Atomic and Subatomic Physics Research
- Particle physics theoretical and experimental studies
- Quantum, superfluid, helium dynamics
- Nuclear physics research studies
- High-Energy Particle Collisions Research
- Advanced NMR Techniques and Applications
- Advanced Aircraft Design and Technologies
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- HVDC Systems and Fault Protection
- Advanced Battery Technologies Research
- Black Holes and Theoretical Physics
- Cold Atom Physics and Bose-Einstein Condensates
- Microgrid Control and Optimization
- Scientific Research and Discoveries
- Real-time simulation and control systems
- Radiation Effects in Electronics
- Particle Accelerators and Free-Electron Lasers
- Quantum chaos and dynamical systems
- Electrical Fault Detection and Protection
- Smart Materials for Construction
- Smart Grid Energy Management
- Superconducting Materials and Applications
- Advanced Chemical Physics Studies
University of Strathclyde
2014-2024
University of Cambridge
2023
British Columbia Children's Hospital
2023
University of British Columbia
2023
Tulane University
2022
American Nephrology Nurses Association
2022
University of St Andrews
2021
Stanford Synchrotron Radiation Lightsource
1966-2018
Stanford University
1966-2018
SLAC National Accelerator Laboratory
1966-2018
The HERMES experiment is collecting data on inclusive and semi-inclusive deep inelastic scattering of polarised positrons from targets H, D, 3He. These give information the spin structure nucleon. This paper describes forward angle spectrometer built for this purpose. includes numerous tracking chambers (micro-strip gas chambers, drift proportional chambers) in front behind a 1.3 T.m magnetic field, as well an extensive set detectors particle identification (a lead-glass calorimeter,...
Results are reported from the HERMES experiment at HERA on a measurement of neutron spin structure function $g_1^n(x,Q^2)$ in deep inelastic scattering using 27.5 GeV longitudinally polarized positrons incident $^3$He internal gas target. The data cover kinematic range $0.023
We present measurements of the ratio proton elastic electromagnetic form factors, μpGEp/GMp. The Jefferson Lab Hall A Focal Plane Polarimeter was used to determine longitudinal and transverse components recoil polarization in ep scattering; these is proportional two factors. These data reproduce observation Jones et al. [Phys. Rev. Lett. 84, 1398 (2000)], that factor decreases significantly from unity above Q2=1GeV2.Received 29 May 2001DOI:https://doi.org/10.1103/PhysRevC.64.038202©2001...
Following Mueller, we relate, through a generalized optical theorem, the single-particle production spectrum to discontinuity in six-line amplitude. Assuming only analyticity of amplitude its angular momenta, obtain general expression for behavior near phase-space boundary. To study asymptotic limit appropriate this region, make use analytic continuation complex helicities.
Turbine-engine-driven distributed electrical aircraft power systems [also referred to as turboelectric propulsion (TeDP)] are proposed for providing thrust future with superconducting components operating at 77 K, in order performance and emission targets be met. The proposal of such presents a radical change from current state-of-the-art aeroelectrical systems. Central the development architecture design trades which must consider system functionality performance, robustness, fault...
We have measured the transverse asymmetry ${A}_{{T}^{\ensuremath{'}}}$ in ${}^{3}\stackrel{\ensuremath{\rightarrow}}{\mathrm{He}}(\stackrel{\ensuremath{\rightarrow}}{e}{,e}^{\ensuremath{'}})$ quasielastic scattering Hall A at Jefferson Laboratory with high precision for ${Q}^{2}$ values from 0.1 to $0.6(\mathrm{GeV}/c{)}^{2}$. The neutron magnetic form factor ${G}_{M}^{n}$ was extracted based on Faddeev calculations ${Q}^{2}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.1$ and...
Pinning the tail: The post-translational methylation of proteins governs important biochemical pathways, including many involved in gene regulation and cancer. We report here on ability well known p-sulfonatocalix[4]arene to bind strongly trimethyllysine with good selectivity over all other cationic side chains (see figure), post-translationally methylated Arg. also find that it binds site selectively low μM affinity Lys(Me3) residue a representative histone tail peptide. Detailed facts...
We examine the constraints imposed on Regge-cut discontinuities by elastic unitarity. find that must be singular at their endpoints, and, contrary to published examples, vanish there. give particular attention "wrong-signature" negative integer angular momenta in spinless problem. There, one Regge cut exactly mask unitarity cut; its discontinuity contains a pole momentum. Our results modify usual expression for contribution of high-energy scattering crossed channels.
The seventh phase of this longitudinal study investigated whether children born through third-party assisted reproduction experienced psychological problems, or difficulties in their relationship with mothers, early adulthood.The impact disclosure biological origins, and quality mother-child relationships from age 3 onward, were also examined.Sixty-five families, including 22 surrogacy 17 egg donation 26 sperm compared 52 unassisted conception families when the aged 20.Less than half mothers...
The violation of mirror symmetry in the weak force provides a powerful tool to study internal structure proton. Experimental results have been obtained that address role strange quarks generating nuclear magnetism. measurement reported here an unambiguous constraint on quark contributions proton's magnetic moment through electron-proton interaction. We also report evidence for existence parity-violating electromagnetic effect known as anapole is not yet well understood theoretically, but it...
We have measured the proton recoil polarization in $^{4}\mathrm{H}\mathrm{e}(\stackrel{\ensuremath{\rightarrow}}{e}\text{ },{e}^{\ensuremath{'}}\stackrel{\ensuremath{\rightarrow}}{p})^{4}\mathrm{H}$ reaction at ${Q}^{2}=0.5$, 1.0, 1.6, and $2.6\text{ }(\mathrm{G}\mathrm{e}\mathrm{V}/c{)}^{2}$. The ratio of transfer coefficients differs from a fully relativistic calculation, favoring inclusion medium modification form factors predicted by quark-meson coupling model. In addition, induced...
We report a new measurement of the parity-violating asymmetry in elastic electron scattering from proton at backward angles. This is sensitive to strange magnetic form factor as well electroweak axial radiative corrections. The A = -4.92+/-0.61+/-0.73 ppm provides significant constraint on these quantities. implications for are discussed context theoretical estimates
We report a measurement of the asymmetry in spin-dependent quasielastic scattering longitudinally polarized electrons from He3 target. The neutron magnetic form factor GMn has been extracted measured based on recent PWIA calculations using spectral functions. Our determination at Q2=0.19 (GeV/c)2 agrees with dipole parametrization. This experiment represents first electron scattering.DOI:https://doi.org/10.1103/PhysRevC.50.R546©1994 American Physical Society
We report on a new measurement of the parity-violating asymmetry in quasielastic electron scattering from deuteron at backward angles Q2=0.038 (GeV/c)2. This quantity provides determination neutral weak axial vector form factor nucleon, which can potentially receive large electroweak corrections. The measured A=-3.51+/-0.57 (stat)+/-0.58 (syst) ppm is consistent with theoretical predictions. also updated results previous experiment Q2=0.091 (GeV/c)2, are
A detailed set of "bootstrap" equations is formulated for zero-spin "external" particles based on a combination the $\frac{N}{D}$ method with superposition top-ranking Regge poles in all three reactions four-line connected part. The contribution from each pole arises distinct strip Mandelstam representation so that double counting avoided. Only real values $l$ $l<~1$ need be considered bootstrap calculation. amplitude emerging our meromorphic right-half plane, and approach high-energy...
By means of the $\frac{N}{D}$ equations, analytically continued in complex angular momentum, we consider details mechanism by which cuts angular-momentum plane eliminate Gribov-Pomeranchuk singularities. The implications two-body unitarity requirement are investigated. A fixed $l$-plane pole signatured partial-wave amplitude is shown to exist where first singularity would be expected absence cuts. It also this case that moving (Regge) poles not asymptotic position pole.
We report the first measurement of vector analyzing power in inclusive transversely polarized elastic electron-proton scattering at Q2=0.1(GeV/c)2 and large angles. This quantity must vanish single virtual photon exchange, plane-wave impulse approximation for this reaction, can therefore provide information on two exchange amplitudes electromagnetic interactions with hadronic systems. The observable we have measured is driven by imaginary part amplitude, side which simply Compton amplitude...
Developments in spin-polarized internal targets for storage rings have permitted measurements of 197 MeV polarized protons scattering from vector deuterons. This work presents the polarization observables Ay, iT11, and Cy,y proton-deuteron elastic scattering. When compared to calculations with without three-nucleon forces, provide further evidence that forces make a contribution observables. indicates three-body derived static nuclear properties appear be crucial description dynamical...
We report the results from a systematic study of quasielastic $(e,{e}^{\ensuremath{'}}p)$ reaction on $^{12}\mathrm{C},\phantom{\rule{0.5em}{0ex}}^{56}\mathrm{Fe}$, and $^{197}\mathrm{Au}$ performed at Jefferson Lab. have measured nuclear transparency extracted spectral functions (corrected for radiation) over ${Q}^{2}$ range $0.64--3.25\phantom{\rule{0.5em}{0ex}}{(\text{GeV}∕c)}^{2}$ all three nuclei. In addition, we separated longitudinal transverse 0.64...
The ( ${e,e}^{\ensuremath{'}}p$) reaction was studied on targets of C, Fe, and Au at momentum transfers squared ${Q}^{2}$ 0.6, 1.3, 1.8, $3.3{\mathrm{GeV}}^{2}$ in a region kinematics dominated by quasifree electron-proton scattering. Missing energy missing distributions are reasonably well described plane wave impulse approximation calculations with $A$ dependent corrections that measure the attenuation final state protons.
Within the frame of European project "Microgrids" several test set-ups have been installed or enlarged at different laboratories. Three them are presented in this contribution: a specially designed single phase system NTUA with agent control software, DeMoTec ISET, which is general site for DER and flywheel rig, by University Manchester. These three sites allow tests components, strategies storage technologies. Though contribution aimed presentation facilities themselves, some results included
A high precision measurement of the transverse spin-dependent asymmetry ${A}_{{T}^{\ensuremath{'}}}$ in ${}^{3}\mathrm{He}\ensuremath{\rightarrow}(\stackrel{\ensuremath{\rightarrow}}{e}{,e}^{\ensuremath{'}})$ quasielastic scattering was performed Hall at Jefferson Lab values squared four-momentum transfer, ${Q}^{2},$ between 0.1 and 0.6 $(\mathrm{G}\mathrm{e}\mathrm{V}/{c)}^{2}.$ is sensitive to neutron magnetic form factor, ${G}_{M}^{n}.$ Values ${G}_{M}^{n}$ ${Q}^{2}=0.1$...