F. Hauenstein
A5064191513- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Nuclear physics research studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Dark Matter and Cosmic Phenomena
- Atomic and Molecular Physics
- Advanced NMR Techniques and Applications
- Nuclear Physics and Applications
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Neutrino Physics Research
- Quantum, superfluid, helium dynamics
- X-ray Spectroscopy and Fluorescence Analysis
- Superconducting Materials and Applications
- Radiation Detection and Scintillator Technologies
- Nuclear reactor physics and engineering
- Medical Imaging Techniques and Applications
- Advanced Chemical Physics Studies
- Astronomical and nuclear sciences
- Scientific Research and Discoveries
- Computational Physics and Python Applications
- Electromagnetic Compatibility and Noise Suppression
- Generative Adversarial Networks and Image Synthesis
Thomas Jefferson National Accelerator Facility
2022-2025
Old Dominion University
2018-2024
Dominion University College
2024
Université Paris-Saclay
2024
Institut de Recherche sur les Lois Fondamentales de l'Univers
2024
CEA Paris-Saclay
2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2024
Campbell Collaboration
2023
Duquesne University
2020-2023
Argonne National Laboratory
2023
We report a precision measurement of the parity-violating asymmetry $A_{PV}$ in elastic scattering longitudinally polarized electrons from $^{208}$Pb. measure $A_{PV}=550\pm 16 {\rm (stat)}\pm 8\ (syst)}$ parts per billion, leading to an extraction neutral weak form factor $F_W(Q^2 = 0.00616\ GeV}^2) 0.368 \pm 0.013$. Combined with our previous measurement, extracted neutron skin thickness is $R_n-R_p=0.283 0.071$~fm. The result also yields first significant direct interior density...
We report a precise measurement of the parity-violating (PV) asymmetry A_{PV} in elastic scattering longitudinally polarized electrons from ^{48}Ca. measure A_{PV}=2668±106(stat)±40(syst) parts per billion, leading to an extraction neutral weak form factor F_{W}(q=0.8733 fm^{-1})=0.1304±0.0052(stat)±0.0020(syst) and charge minus F_{ch}-F_{W}=0.0277±0.0055. The resulting neutron skin thickness R_{n}-R_{p}=0.121±0.026(exp)±0.024(model) fm is relatively thin yet consistent with many model...
Exclusive and kinematically complete high-statistics measurements of quasifree polarized $\stackrel{\ensuremath{\rightarrow}}{n}p$ scattering have been performed in the energy region narrow resonancelike structure ${d}^{*}$ with $I({J}^{P})=0({3}^{+})$, $M\ensuremath{\approx}2380\text{ }\text{ }\mathrm{MeV}$, $\mathrm{\ensuremath{\Gamma}}\ensuremath{\approx}70\text{ }\mathrm{MeV}$ observed recently double-pionic fusion channels...
We measured the triple coincidence A(e,e'np) and A(e,e'pp) reactions on carbon, aluminum, iron, lead targets at Q2 > 1.5 (GeV/c)2, xB 1.1 missing momentum 400 MeV/c. This was first direct measurement of both proton-proton (pp) neutron-proton (np) short-range correlated (SRC) pair knockout from heavy asymmetric nuclei. For all nuclei, average to reduced cross-section ratio is about 6%, in agreement with previous indirect measurements. Correcting for Single-Charge Exchange effects decreased...
We apply generative adversarial network (GAN) technology to build an event generator that simulates particle production in electron-proton scattering is free of theoretical assumptions about underlying dynamics. The difficulty efficiently training a GAN simulator lies learning the complicated patterns distributions particles physical properties. develop selects set transformed features from momenta can be generated easily by generator, and uses these produce augmented improve sensitivity...
The ratio of the nucleon F_{2} structure functions, F_{2}^{n}/F_{2}^{p}, is determined by MARATHON experiment from measurements deep inelastic scattering electrons ^{3}H and ^{3}He nuclei. was performed in Hall A Facility Jefferson Lab using two high-resolution spectrometers for electron detection, a cryogenic target system which included low-activity tritium cell. data analysis used novel technique exploiting mirror symmetry nuclei, essentially eliminates many theoretical uncertainties...
Exclusive measurements of the quasifree $pn\ensuremath{\rightarrow}pp{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{\ensuremath{-}}$ reaction have been performed by means $pd$ collisions at ${T}_{p}$ $=$ 1.2 GeV using wide angle shower apparatus (WASA) detector setup cooler synchrotron COSY (Institut f\"ur Kernphysik, J\"ulich). Total and differential cross sections obtained covering energy region $\sqrt{s}$ (2.35--2.46) GeV, which includes ABC effect its associated resonance structure. No...
New data on quasifree polarized neutron-proton scattering in the region of recently observed ${d}^{*}$ resonance structure are obtained by exclusive and kinematically complete high-statistics measurements with WASA at COSY. This paper details determination beam polarization, checks character process, all ${A}_{y}$ angular distributions new partial-wave analysis, which includes producing a pole ${}^{3}{D}_{3}\ensuremath{-}{}^{3}{G}_{3}$ coupled partial waves...
Exclusive measurements of the quasi-free $np \to np\pi^0\pi^0$ reaction have been performed by means $dp$ collisions at $T_d$ = 2.27 GeV using WASA detector setup COSY. Total and differential cross sections obtained covering energy region $\sqrt s$ (2.35 - 2.46) GeV, which includes ABC effect its associated $d^*(2380)$ resonance. Adding $d^*$ resonance amplitude to that for conventional processes leads a reasonable description data. The observed in total section is agreement with predictions...
An exclusive measurement of the excitation function for dd->3Heppi- reaction was performed at Cooler Synchrotron COSY-Juelich with WASA-at-COSY detection system. The data were taken during a slow acceleration beam from 2.185 GeV/c to 2.400 crossing kinematic threshold eta meson production in dd->4He-eta 2.336 GeV/c. corresponding excess energy respect 4He-eta system varied -51.4MeV 22MeV. integrated luminosity experiment determined using dd->3Hen reaction. shape examined. No signal bound...
Short-range correlated (SRC) nucleon pairs are a vital part of the nucleus, accounting for almost all nucleons with momentum greater than Fermi (${k}_{F}$). A fundamental characteristic SRC is having large relative momenta as compared to ${k}_{F}$, and smaller center mass (c.m.) which indicates small separation distance between in pair. Determining c.m. distribution essential understanding their formation process. We report here on extraction motion proton-proton ($pp$) carbon and, first...
High-momentum configurations of nucleon pairs at short-distance are probed using measurements the $^{12}$C$(e,e'p)$ and $^{12}$C$(e,e'pN)$ reactions (where $N$ is either $n$ or $p$), high-$Q^2$ $x_B>1.1$. The data span a missing-momentum range 300--1000 MeV/c predominantly sensitive to transition region strong nuclear interaction from Tensor Scalar interaction. well reproduced by theoretical calculations Generalized Contact Formalism with both chiral phenomenological nucleon-nucleon...
We report high-precision measurements of the deeply virtual Compton scattering (DVCS) cross section at high values Bjorken variable x_{B}. DVCS is sensitive to generalized parton distributions nucleon, which provide a three-dimensional description its internal constituents. Using exact analytic expression for all possible polarization states initial and final electron state photon, we present first experimental extraction four helicity-conserving form factors (CFFs) nucleon as function...
The E12-14-012 experiment, performed in Jefferson Lab Hall A, has measured the $(e, e'p)$ cross section parallel kinematics using a natural argon target. Here, we report full results of analysis data set corresponding to beam energy 2.222 GeV, and spanning missing momentum range $15 \lesssim p_m 300$ MeV/c $12 E_m 80$ MeV. reduced section, determined as function $p_m$ $E_m$ with $\approx$4\% accuracy, been fitted Monte Carlo simulations involving model spectral including effects final state...
Measurements of the polarization observables <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:mi mathvariant="normal">Σ</a:mi><a:mo>,</a:mo><a:mi mathvariant="bold">P</a:mi><a:mo>,</a:mo><a:mi mathvariant="bold">T</a:mi><a:mo>,</a:mo><a:msub><a:mi mathvariant="bold">O</a:mi><a:mi mathvariant="bold">x</a:mi></a:msub><a:mo>,</a:mo><a:msub><a:mi mathvariant="bold">z</a:mi></a:msub></a:mrow></a:math> for reaction <i:math...
To probe CP violation in the leptonic sector using GeV energy neutrino beams current and future experiments argon detectors, precise models of complex underlying antineutrino interactions are needed. The E12-14-012 experiment at Jefferson Lab Hall A was designed to perform a combined analysis inclusive exclusive electron scatterings on both ($N = 22$) titanium ($Z nuclei beams. measurement nucleus provides essential information understand scattering argon, large contribution which comes from...