A5002638918- Particle physics theoretical and experimental studies
- Nuclear physics research studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Quantum, superfluid, helium dynamics
- Particle accelerators and beam dynamics
- Particle Detector Development and Performance
- Superconducting Materials and Applications
- Atomic and Molecular Physics
- Cold Atom Physics and Bose-Einstein Condensates
- Particle Accelerators and Free-Electron Lasers
- Neutrino Physics Research
- Advanced Chemical Physics Studies
- Dark Matter and Cosmic Phenomena
- Advanced NMR Techniques and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Computational Physics and Python Applications
- Medical Imaging Techniques and Applications
- Astronomical and nuclear sciences
- Photocathodes and Microchannel Plates
- Muon and positron interactions and applications
- Electron and X-Ray Spectroscopy Techniques
- Pulsars and Gravitational Waves Research
Thomas Jefferson National Accelerator Facility
2015-2024
University of Virginia
2016-2024
University of Tennessee at Knoxville
2024
Istituto Nazionale di Fisica Nucleare, Sezione di Genova
2024
Virginia Tech
2022-2023
Al-Zaytoonah University of Jordan
2023
Shandong University
2023
Massachusetts Institute of Technology
2020-2022
National Superconducting Cyclotron Laboratory
2022
Hue University
2020-2022
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...
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...
The success of the ambitious programs both long- and short-baseline neutrino-oscillation experiments employing liquid-argon time-projection chambers will greatly rely on precision with which weak response argon nucleus can be estimated. In E12-14-012 experiment at Jefferson Lab Hall A, we have studied properties by scattering a high-quality electron beam off high-pressure gaseous target. Here, present measured $^{40}$Ar$(e,e^{\prime})$ double differential cross section incident energy...
Quasielastic $^{12}$C$(e,e'p)$ scattering was measured at space-like 4-momentum transfer squared $Q^2$~=~8, 9.4, 11.4, and 14.2 (GeV/c)$^2$, the highest ever achieved to date. Nuclear transparency for this reaction extracted by comparing yield that expected from a plane-wave impulse approximation calculation without any final state interactions. The consistent with no $Q^2$ dependence, up proton momenta of 8.5~GeV/c, ruling out quantum chromodynamics effect color scales in exclusive...
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...
Recent advancements in Metastability Exchange Optical Pumping (MEOP) techniques have enabled the investigation of ³He nuclear spin polarization under high magnetic fields and varying gas pressures. At Jefferson Lab, we are employing MEOP nuclei at pressures using a fillable cell ranging from 2 to 5 T. The current development focuses on creating double-cell, cryogenic polarized target for CLAS12 Hall B JLab, featuring central solenoid that generates field 5T. We will present progress...
The E12-14-012 experiment, performed in Jefferson Lab Hall A, has measured the (e,e'p) cross section parallel kinematics using a natural titanium target. Here, we report full results of analysis data set corresponding to beam energy 2.2 GeV, and spanning missing momentum range 15 <= pm 250 MeV/c 12 Em 80 MeV. reduced been with ~7% accuracy as function both energy. We compared our Monte Carlo simulations model spectral including effects final state interactions. overall agreement between is...
We report the first measurement of (e,e′p) three-body breakup reaction cross sections in helium-3 (3He) and tritium (3H) at large momentum transfer [⟨Q2⟩≈1.9 (GeV/c)2] xB>1 kinematics, where section should be sensitive to quasielastic (QE) scattering from single nucleons. The data cover missing momenta 40≤pmiss≤500 MeV/c that, QE limit with no rescattering, equals initial probed nucleon. measured are compared state-of-the-art ab initio calculations. Overall good agreement, within ±20%, is...
We report the first measurement of $(e,e'p)$ reaction cross-section ratios for Helium-3 ($^3$He), Tritium ($^3$H), and Deuterium ($d$). The covered a missing momentum range $40 \le p_{miss} 550$ MeV$/c$, at large transfer ($\langle Q^2 \rangle \approx 1.9$ (GeV$/c$)$^2$) $x_B>1$, which minimized contributions from non quasi-elastic (QE) mechanisms. data is compared with plane-wave impulse approximation (PWIA) calculations using realistic spectral functions distributions. measured...
The E12-14-012 experiment performed at Jefferson Lab Hall A has collected inclusive electron-scattering data for different targets the kinematics corresponding to beam energy 2.222 GeV and scattering angle 15.54 deg. Here we present a comprehensive analysis of compare double-differential cross sections electrons, extracted using solid (aluminum, carbon, titanium) closed argon-gas cell. extend over broad range transfer, where quasielastic interaction, Delta-resonance excitation, inelastic...
The E12-14-012 experiment, performed in Jefferson Lab Hall A, has collected exclusive electron-scattering data (e,e$^\prime$p) parallel kinematics using natural argon and titanium targets. Here, we report the first results of analysis set corresponding to beam energy 2,222 MeV, electron scattering angle 21.5 deg, proton emission -50 deg. differential cross sections, measured with $\sim$4% uncertainty, have been studied as a function missing momentum, compared Monte Carlo simulations,...
A mass spectroscopy experiment with a pair of nearly identical high-resolution spectrometers and tritium target was performed in Hall at Jefferson Lab. Utilizing the (e,e′K+) reaction, enhancements, which may correspond to possible Λnn resonance ΣNN states, were observed an energy resolution about 1.21 MeV (σ), although greater statistics are needed make definitive identifications. An experimentally measured state provide unique constraint determining Λn interaction, for no scattering data...
Short-range correlations (SRCs) have been identified as being responsible for the high-momentum tail of nucleon momentum distribution, $n(k)$. Hard, short-range interactions pairs generate and imprint a universal character on $n(k)$ all nuclei at large momentum. Triple coincidence experiments shown strong dominance $np$ pairs, but these measurements involve final-state interactions. This paper presents results from Jefferson Lab experiment E08014 which measured inclusive electron scattering...
The spin structure function of the neutron is traditionally determined by measuring asymmetry inclusive electron deep inelastic scattering (DIS) off polarized3He nuclei. In such experiments, nuclear effects can lead to large model dependencies in interpretation experimental data. Here we study feasibility suppressing tagging both spectator protons process DIS neutrons in3He at forthcoming Electron-Ion Collider (EIC). This allows reconstructing momentum struck ensure it was nearly rest...
$^{2}\mathrm{H}(e,e'p)n$ cross sections have been measured at 4-momentum transfers of $Q^{2} = 4.5 \pm 0.5$ (GeV/c)$^{2}$ over a range neutron recoil momenta, $p_{\mathrm{r}}$, reaching up to $\sim1.0$ GeV/c. The data were obtained fixed angles $\theta_{nq} 35^\circ$, $45^\circ$ and $75^{\circ}$ with respect the 3-momentum transfer $\vec q$. new agree well previous which reached $p_{\mathrm{r}}\sim500$ MeV/c. At 35^\circ$ $45^\circ$, final state interactions (FSI), meson exchange currents...
We present new data probing short-range correlations (SRCs) in nuclei through the measurement of electron scattering off high-momentum nucleons nuclei. The inclusive $^{4}\mathrm{He}/^{3}\mathrm{He}$ cross section ratio is observed to be both $x$ and ${Q}^{2}$ independent for $1.5<x<2$, confirming dominance two-nucleon correlations. For $x>2$, our support hypothesis that a previous claim three-nucleon correlation was an artifact caused by limited resolution measurement. While 3N-SRCs appear...
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 used two high resolution spectrometers for electron detection, a cryogenic target system which included low-activity tritium cell. data analysis novel technique exploiting mirror symmetry nuclei, essentially eliminates many theoretical uncertainties extraction...
The nuclear dependence of the inclusive inelastic electron scattering cross section (the EMC effect) has been measured for first time in $^{10}$B and $^{11}$B. Previous measurements effect $A \leq 12$ nuclei showed an unexpected dependence; $^{11}$B were to explore this region more detail. Results are presented $^9$Be, $^{10}$B, $^{11}$B, $^{12}$C at incident beam energy 10.6~GeV. boron isotopes was found be similar that $^9$Be $^{12}$C, yielding almost no range $A=4-12$. This represents...
The electromagnetic form factors of the proton and neutron encode information on spatial structure their charge magnetization distributions. While measurements are relatively straightforward, lack a free target makes neutron’s more challenging sensitive to experimental or model-dependent uncertainties. Various experiments have attempted extract from scattering in deuterium, with different techniques providing different, sometimes large, systematic We present results novel measurement...
The small binding energy of the hypertrition leads to predictions non-existence bound hypernuclei for isotriplet three-body systems such as $nn\Lambda$. However, invariant mass spectroscopy at GSI has reported events that may be interpreted $nn\Lambda$ state. state was sought by missing-mass via $(e,e'K^+)$ reaction Jefferson Lab's experimental Hall A. present experiment higher sensitivity $nn\Lambda$-state investigation in terms better precision a factor about three. analysis shown this...
We report on a search for bound di-neutron by comparing electron-induced proton-knockout $(e,e'p)$ measurements from Helium-3 ($^3$He) and Tritium ($^3$H). The were performed at Jefferson Lab Hall A with 4.326 GeV electron beam, kinematics of large momentum transfer $Q^2 \approx 1.9$ (GeV/$c$)$^2$ $x_B>1$, to minimize contributions non quasi-elastic (QE) reaction mechanisms. Analyzing the measured $^3$He missing mass ($M_{miss}$) energy ($E_{miss}$) distributions, we can distinguish two-body...
An Electron-Ion Collider (EIC) with center-of-mass energies sqrt(s_{eN}) ~ 20-100 GeV and luminosity L 10^{34} cm^{-2} s^{-1} would offer new opportunities to study heavy quark production in high-energy electron or photon scattering on protons nuclei. We report about an R&D project exploring the feasibility of direct measurements nuclear gluon densities at large x (gluonic EMC effect, antishadowing) using open charm EIC. describe rates angle-momentum distributions discuss methods...