A5059491680- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Nuclear physics research studies
- Advanced Chemical Physics Studies
- Nuclear reactor physics and engineering
- Cold Atom Physics and Bose-Einstein Condensates
- Photocathodes and Microchannel Plates
- Atomic and Molecular Physics
- Pulsars and Gravitational Waves Research
- Geochemistry and Geologic Mapping
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Advanced NMR Techniques and Applications
- Particle Detector Development and Performance
- Urological Disorders and Treatments
- Neutrino Physics Research
- Computational Physics and Python Applications
New Mexico State University
2010-2024
Valparaiso University
2011-2014
The Evergreen State College
2013
Thomas Jefferson National Accelerator Facility
2010
Hebrew University of Jerusalem
1976
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 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"...
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...
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 $G_A^s(Q^2)$ at low $Q^2$ very well because there was no for $Q^2<0.45$ GeV$^2$. Our new includes first time...
The parity-violating (PV) asymmetry of inclusive π- production in electron scattering from a liquid deuterium target was measured at backward angles. measurement conducted as part the G0 experiment, beam energy 360 MeV. physics process dominating pion for these kinematics is quasifree photoproduction off neutron via Δ0 resonance. In context heavy-baryon chiral perturbation theory, this related to low-energy constant d(Δ)- that characterizes γNΔ coupling. Zhu et al. calculated model...
The total contribution of strange quarks to the intrinsic spin nucleon can be determined from a measurement strange-quark nucleon's elastic axial form factor. We have studied strangeness vector and factors nucleon, using all available electroweak scattering data. Specifically, we combine νp cross section data Brookhaven E734 experiment with ep quasi-elastic ed e-4He parity-violating asymmetry SAMPLE, HAPPEx, G0 PVA4 experiments. not only these at individual values momentum-transfer (Q2), as...
The total contribution of strange quarks to the intrinsic spin nucleon can be determined from a measurement strange-quark nucleon's elastic axial form factor. We have studied strangeness vector and factors nucleon, using electroweak scattering data. Specifically, we combine $\nu p$ $\bar{\nu} cross section data Brookhaven E734 experiment with $ep$ quasi-elastic $ed$ $e$-$^4$He parity-violating asymmetry SAMPLE, HAPPEx, G0 PVA4 experiments. not only these at individual values...
The parity-violating asymmetry arising from inelastic electron-nucleon scattering at backward angle (~95 degrees) near the Delta(1232) resonance has been measured using a hydrogen target. From this asymmetry, we extracted axial transition form factor G^A_{N\Delta}, function of Adler factors C^A_i. Though G^A_{N\Delta} previously studied charged current reactions, is first measurement weak neutral excitation Delta proton For Q^2 = 0.34 (GeV/c)^2 and W 1.18 GeV, was to be -33.4 \pm...
Second-order induction energies arising in the interaction between two hydrogen atoms have been calculated both for ground-state and a ground an excited (2s) state atom. The method employed is rapidly convergent variational procedure with explicitly two-centre basis functions. are very small at large internuclear separations, but they not completely negligible binding regions.
We have measured parity violating asymmetries in elastic electron-proton and quasi-elastic electrondeuteron scattering at backward electron angle. These measurements been done two momentum transfers : Q2 = 0.22 0.63 (GeV/c)2 . Together with our previous forward angle measurement [1], we can extract strange quark contributions to the electromagnetic form factors of nucleon, as well nucleon axial factor coming from neutral weak interaction. The results indicate a magnetic contribution close...