A5053089865- Particle physics theoretical and experimental studies
- Nuclear physics research studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Atomic and Molecular Physics
- Particle Detector Development and Performance
- Particle accelerators and beam dynamics
- Radiation Detection and Scintillator Technologies
- Advanced Chemical Physics Studies
- Nuclear Physics and Applications
- Particle Accelerators and Free-Electron Lasers
- Computational Physics and Python Applications
- Distributed and Parallel Computing Systems
- High-pressure geophysics and materials
- Astronomical and nuclear sciences
- Laser-Plasma Interactions and Diagnostics
- Pulsars and Gravitational Waves Research
- Elasticity and Wave Propagation
- Quantum, superfluid, helium dynamics
- Elasticity and Material Modeling
- Radiation Therapy and Dosimetry
- Thermodynamic and Structural Properties of Metals and Alloys
- Gaussian Processes and Bayesian Inference
- Medical Imaging Techniques and Applications
- Cold Fusion and Nuclear Reactions
University of California, Riverside
2023-2024
Duke University
2024
Tribhuvan University
2023
Ohio University
2020-2022
Massachusetts Institute of Technology
2019
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...
Abstract Score based generative models are a new class of that have been shown to accurately generate high dimensional calorimeter datasets. Recent advances in used images with 3D voxels represent and model complex showers. Point clouds, however, likely more natural representation showers, particularly calorimeters granularity. clouds preserve all the information original simulation, naturally deal sparse datasets, can be implemented compact data files. In this work, two state-of-the-art...
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...
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...
We outline the physics opportunities provided by Electron Ion Collider (EIC). These include study of parton structure nucleon and nuclei, onset gluon saturation, production jets heavy flavor, hadron spectroscopy tests fundamental symmetries. review present status future challenges in EIC theory that have to be addressed order realize this ambitious impactful program, including how engage a diverse inclusive workforce. In address these many-fold challenges, we propose coordinated effort...
Abstract One of the key design choices any sampling calorimeter is how fine to make longitudinal and transverse segmentation. To inform this choice, we study impact segmentation on energy reconstruction. ensure that trends are due entirely hardware not a sub-optimal use segmentation, deploy deep neural networks perform These all available information by representing as point cloud. demonstrate our approach, simulate detector similar forward system intended for in ePIC detector, which will...
We report precision determinations of the beam-normal single spin asymmetries (A_{n}) in elastic scattering 0.95 and 2.18 GeV electrons off ^{12}C, ^{40}Ca, ^{48}Ca, ^{208}Pb at very forward angles where most detailed theoretical calculations have been performed. The first measurements A_{n} for ^{40}Ca ^{48}Ca are found to be similar that consistent with expectations thus demonstrating validity nuclei Z≤20. also two new momentum transfers (Q^{2}) extending previous measurement. Our data...
We present new precision measurements of the elastic electron-proton scattering cross section for momentum transfer (Q^{2}) up to 15.75 (GeV/c)^{2}. Combined with existing data, these provide an improved extraction proton magnetic form factor at high Q^{2} and double range over which a longitudinal or transverse separation can be performed. The difference between our results polarization data agrees that observed lower attributed hard two-photon exchange (TPE) effects, extending 8...
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...
We report measurements of the exclusive neutral pion electroproduction cross section off protons at large values x_{B} (0.36, 0.48, and 0.60) Q^{2} (3.1 to 8.4 GeV^{2}) obtained from Jefferson Lab Hall A experiment E12-06-014. The corresponding structure functions dσ_{T}/dt+εdσ_{L}/dt, dσ_{TT}/dt, dσ_{LT}/dt, dσ_{LT^{'}}/dt are extracted as a function proton momentum transfer t-t_{min}. results suggest amplitude for transversely polarized virtual photons continues dominate throughout this...
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...
A measurement of the double-spin asymmetry from electron-$^{3}$He scattering in threshold region two- and three-body breakup $^{3}$He was performed at Jefferson Lab, for Q$^{2}$ values 0.1 0.2 (GeV/$c$)$^{2}$. The results this serve as a stringent test our understanding few-body systems. When compared with calculations plane wave impulse approximation Faddeev theory, we found that calculations, which use modern nuclear potentials prescriptions meson-exchange currents, demonstrate an overall...
In our quest to understand the nature of dark matter and discover its non-gravitational interactions with ordinary matter, we propose an experiment using a \pbo ~calorimeter search for or set new limits on production rate i) hidden sector particles in $3 - 60$ MeV mass range via their $e^+e^-$ decay (or $\gamma\gamma$ limited tracking), ii) hypothetical X17 particle, claimed multiple recent experiments. The these is motivated by models candidates introduced account variety experimental...
In this study, we investigate the Klein-Nishina differential cross-section equation for total and extend it to calculate molecular compounds Al2O3, PbO, Fe2O3. Our findings reveal that of these is significantly larger, with values 5 times greater than atomic cross-section. Furthermore, determine Fe2O3 73, 132, 118 electronic cross-section, respectively, while 15, 66, 24 greater. At low energy levels ranging from 1-5 MeV, entire molecular, atomic, dominates due Compton scattering. However, as...