S. F. Pate
A5105526460- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- Nuclear reactor physics and engineering
- Astrophysics and Cosmic Phenomena
- Superconducting Materials and Applications
- Radiation Detection and Scintillator Technologies
- Particle Accelerators and Free-Electron Lasers
- Nuclear Physics and Applications
- Particle accelerators and beam dynamics
- Quantum, superfluid, helium dynamics
- Muon and positron interactions and applications
- Cold Atom Physics and Bose-Einstein Condensates
- Computational Physics and Python Applications
- Radiation Therapy and Dosimetry
- Atmospheric Ozone and Climate
- Advanced NMR Techniques and Applications
- Statistical Methods and Bayesian Inference
- Spectroscopy and Laser Applications
- Radioactive Decay and Measurement Techniques
New Mexico State University
2015-2024
Colorado State University
2023-2024
University of Cincinnati
2023-2024
Nankai University
2024
Louisiana State University
2024
PHENIX laboratory
2003-2023
Abilene Christian University
2003-2023
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
2023
Banaras Hindu University
1998-2023
Augustana University
2014-2023
We have measured parity-violating asymmetries in elastic electron-proton scattering over the range of momentum transfers 0.12 < or =Q2 =1.0 GeV2. These asymmetries, arising from interference electromagnetic and neutral weak interactions, are sensitive to strange-quark contributions currents proton. The measurements were made at Jefferson Laboratory using a toroidal spectrometer detect recoiling protons liquid hydrogen target. results indicate nonzero, Q2 dependent, provide new information...
We report on precision measurements of the elastic cross section for electron-proton scattering performed in Hall C at Jefferson Lab. The were made 28 distinct kinematic settings covering a range momentum transfer $0.4<{Q}^{2}<5.5\phantom{\rule{0.3em}{0ex}}{(\mathrm{GeV}∕c)}^{2}$. These represent significant contribution to world's data set ${Q}^{2}$ range, where large discrepancy currently exists between ratio electric magnetic proton form factors extracted from previous and that recently...
We have measured parity-violating asymmetries in elastic electron-proton and quasielastic electron-deuteron scattering at ${Q}^{2}=0.22$ $0.63\text{ }\text{ }{\mathrm{GeV}}^{2}$. They are sensitive to strange quark contributions currents the nucleon axial-vector current. The results indicate of $\ensuremath{\lesssim}10%$ charge magnetic form factors these four-momentum transfers. also present first measurement anapole moment effects current
We present several studies of convolutional neural networks applied to data coming from the MicroBooNE detector, a liquid argon time projection chamber (LArTPC). The algorithms studied include classification single particle images, localization and neutrino interactions in an image, detection simulated event overlaid with cosmic ray backgrounds taken real detector data. These demonstrate potential for identification or on interactions. also address technical issues that arise when applying...
In this document the PHENIX collaboration proposes a major upgrade to detector at Relativistic Heavy Ion Collider. This upgrade, sPHENIX, enables an extremely rich jet and beauty quarkonia physics program addressing fundamental questions about nature of strongly coupled quark-gluon plasma (QGP), discovered experimentally RHIC be perfect fluid. The startling dynamics QGP on fluid-like length scales is emergent property quantum chromodynamics (QCD), seemingly implicit in Lagrangian but...
The total cross section for the reaction pp\ensuremath{\rightarrow}pp${\mathrm{\ensuremath{\pi}}}^{0}$ was measured at nine center-of-mass energies from 1.5 to 23 MeV above threshold. experiment carried out with Indiana Cooler, a recently constructed storage ring. experimental advantages of an electron-cooled proton beam were utilized. data cover energy range where only lowest possible angular momentum state contributes in exit channel. dependence is not compatible that predicted by models...
The first measurements of the differential cross section for d(gamma,p)n reaction up to 4.0 GeV were performed at Continuous Electron Beam Accelerator Facility (CEBAF) Jefferson Lab. We report sections proton center-of-mass angles 36, 52, 69 and 89 degrees. These results are in reasonable agreement with previous lower energy. degree data show constituent-counting-rule behavior photon 36 52 disagree counting rule behavior. quantum chromodynamics (QCD) model nuclear reactions involving reduced...
We present a global fit of neutral-current elastic (NCE) neutrino-scattering data and parity-violating electron-scattering (PVES) with the goal determining strange quark contribution to vector axial form factors proton. Previous fits this included from variety PVES experiments (PVA4, HAPPEx, G0, SAMPLE) NCE neutrino anti-neutrino BNL E734. These did not constrain strangeness factor <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"...
The first measurements of the d(gamma,p)n differential cross section at forward angles and photon energies above 4 GeV were performed Thomas Jefferson National Accelerator Facility (JLab). results indicate evidence an angular dependent scaling threshold. Results straight theta(cm) = 37 degrees are consistent with constituent counting rules for E(gamma) greater, similar GeV, while those 70 1.5 GeV.
A new method of obtaining the strange form factors nucleon is presented, in which forward-angle parity-violating e-->p elastic scattering data are combined with nup and nu;p to extract all three factors: electric, magnetic, axial (G(s)(E), G(s)(M), G(s)(A)). In this Letter, from Brookhaven E734 experiment Jefferson Laboratory HAPPEX obtain two distinct solutions for at Q(2)=0.5 GeV2. More generally, combining neutrino existing upcoming will yield Q2 0.45-1.05 Measurement G(s)(A) crucial...
We have measured the beam-normal single-spin asymmetry in elastic scattering of transversely polarized 3 GeV electrons from unpolarized protons at Q2=0.15, 0.25 (GeV/c)2. The results are inconsistent with calculations solely using nucleon intermediate state and generally agree significant inelastic hadronic contributions. A(n) provides a direct probe imaginary component 2gamma exchange amplitude, complete description which is important interpretation data precision electron-scattering experiments.
We have measured the beam-normal single-spin asymmetries in elastic scattering of transversely polarized electrons from proton, and performed first measurement quasielastic on deuteron, at backward angles (lab angle 108°) for Q² = 0.22 GeV²/c² 0.63 beam energies 362 687 MeV, respectively. The asymmetry arises due to imaginary part interference two-photon exchange amplitude with that single-photon exchange. Results proton are consistent a model calculation which includes inelastic...
The PHENIX collaboration presents a concept for major upgrade to the detector at Relativistic Heavy Ion Collider (RHIC). This upgrade, referred as sPHENIX, brings exciting new capability RHIC program by opening and important channels experimental investigation utilizing fully luminosity of recently upgraded facility. sPHENIX enables compelling jet physics that will address fundamental questions about nature strongly coupled quark-gluon plasma discovered experimentally be perfect fluid....
The strange quark contribution to the vector and axial form factors of nucleon has been determined for momentum transfers in range $0.45<{Q}^{2}<1.0$ GeV${}^{2}$. results are obtained via a combined analysis forward-scattering, parity-violating elastic $\stackrel{\ensuremath{\rightarrow}}{e}p$ asymmetry data from G0 HAPPEx experiments at Jefferson Lab $\ensuremath{\nu}p$- $\overline{\ensuremath{\nu}}p$-scattering Experiment 734 Brookhaven National Laboratory. asymmetries measured scattering...
We report on a detailed study of longitudinal strength in the nucleon resonance region, presenting new results from inclusive electron-proton cross sections measured at Jefferson Lab Hall C four-momentum transfer range $0.2<{Q}^{2}<5.5\phantom{\rule{4pt}{0ex}}{\mathrm{GeV}}^{2}$. The data have been used to accurately perform 167 Rosenbluth-type longitudinal/transverse separations. precision $R={\ensuremath{\sigma}}_{L}/{\ensuremath{\sigma}}_{T}$ are presented here, along with first separate...
We report measurements of spin correlations and analyzing powers in He→3(p→, 2p) pn) quasielastic scattering as a function momentum transfer missing at 197 MeV using polarized internal target the Indiana University Cyclotron Facility Cooler Ring. At sufficiently high we find observables are good agreement with free p−n observables, therefore that He→3 can serve neutron target. The extracted polarizations nucleons low consistent Faddeev calculations.Received 18 August...
The differential cross section for pp\ensuremath{\rightarrow}pp\ensuremath{\gamma} has been measured at an average bombarding energy of 294 MeV and proton laboratory angles between 5\ifmmode^\circ\else\textdegree\fi{} 12\ifmmode^\circ\else\textdegree\fi{}. absolute normalization the data is based on concurrent measurement pp elastic scattering. experiment carried out with Indiana University Cyclotron Facility Cooler Ring using internal gas jet target in electron-cooled beam. cover a region...
We report the first measurement of analyzing powers and spin correlation parameters using a storage ring with both beam internal target polarized. Spin observables were measured for elastic scattering 45 198 MeV protons from polarized $^{3}\mathrm{He}$ nuclei in new laser-pumped gas at Indiana University Cyclotron Facility Cooler Ring. Scattered recoil detected coincidence large acceptance plastic scintillators silicon detectors. The internal-target technique demonstrated this experiment has...
This paper presents the physics case for a new high-energy, ultra-high statistics neutrino scattering experiment, NuSOnG (Neutrino Scattering on Glass). experiment uses Tevatron-based beam to obtain over an order of magnitude higher than presently available purely weak processes ν μ + e - → and . A sample Deep Inelastic events which is two orders larger past samples will also be obtained. As result, unique among present planned experiments its ability probe couplings Beyond Standard Model...
We have measured the $\mathrm{pd}$ elastic scattering with an electron-cooled beam of a proton storage ring and internal jet target operated HD gas. The accurately known H/D ratio is used to transfer precision existing $\mathrm{pp}$ data cross sections. Measurements were performed for energies between 200 300 MeV in angular range $11\ifmmode^\circ\else\textdegree\fi{}<~{\ensuremath{\Theta}}_{\mathrm{c}.\mathrm{m}.}<~ 29\ifmmode^\circ\else\textdegree\fi{}.$ results are compared...