206 citations · 713 across the 38 of their papers we have counts for
29 papers · 1 filter
A New Low Measurement of the Proton's Spin Structure Function from Longitudinal & Transverse Polarized Data
D. Ruth, R. Zielinski, C. Gu +94
The proton's spin structure has proven to be far more complicated than was originally believed, and has been the subject of a number of experimental investigations. %Early measurem…
Near-Threshold J/ Photoproduction and the Gluonic Gravitational Form Factors of the Proton
007 Collaboration, S. Joosten, Z. -E. Meziani +56
We report on the measurement of the two-dimensional differential cross section for near-threshold J/ photoproduction from the J/-007 experiment in Hall C at Jeffers…
Threshold Photoproduction as a Probe of Nuclear Gluon Structure
J. R. Pybus, D. Dutta, H. Gao +83
The nuclear EMC effect is the observation that quark distributions in bound nucleons experience significant modification at large relative to free nucleons. Despite decades of…
Measuring short-range correlations and quasi-elastic cross sections in A(e,e') at x>1 and modest Q
Y. P. Zhang, Z. H. Ye, D. Nguyen +96
We present results from the Jefferson Lab E08-014 experiment, investigating short-range correlations (SRC) through measurements of inclusive quasi-elastic scattering from H, $^…
Studying the Strangeness -Term in Hall C via Exclusive Electroproduction
H. T. Klest, S. Joosten, H. Szumila-Vance +56
We propose a measurement of exclusive electroproduction of mesons near threshold in Hall C. We will measure the |t|-dependence of the exclusive electroproduction cross sect…
The EMC Effect of Tritium and Helium-3 from the JLab MARATHON Experiment
D. Abrams, H. Albataineh, B. S. Aljawrneh +131
Measurements of the EMC effect in the tritium and helium-3 mirror nuclei are reported. The data were obtained by the MARATHON Jefferson Lab experiment, which performed deep inelast…
Quasielastic Asymmetry in the Threshold Region
M. Nycz, W. Armstrong, T. Averett +97
A measurement of the double-spin asymmetry from electron-He scattering in the threshold region of two- and three-body breakup of He was performed at Jefferson Lab, for…
Pion electroproduction measurements in the nucleon resonance region
R. Li, N. Sparveris, H. Atac +46
We report new pion electroproduction measurements in the resonance, utilizing the SHMS - HMS magnetic spectrometers of Hall C at Jefferson Lab. The data focus on a region…
The Proton Electromagnetic Generalized Polarizabilities
Nikos Sparveris
The electromagnetic polarizabilities are fundamental properties of the proton that characterize its response to an external EM field. The generalization of the EM polarizabilities…
Measured proton electromagnetic structure deviates from theoretical predictions
R. Li, N. Sparveris, H. Atac +44
The visible world is founded on the proton, the only composite building block of matter that is stable in nature. Consequently, understanding the formation of matter relies on expl…
Determining the Proton's Gluonic Gravitational Form Factors
B. Duran, Z. -E. Meziani, S. Joosten +52
The proton is one of the main building blocks of all visible matter in the universe. Among its intrinsic properties are its electric charge, mass, and spin. These emerge from the c…
The Proton Spin Structure Function and Generalized Polarizabilities in the Strong QCD Regime
D. Ruth, R. Zielinski, C. Gu +94
The strong interaction is not well understood at low energy, or for interactions with low momentum transfer , but one of the clearest insights we have comes from Chiral Pertur…
Form Factors and Two-Photon Exchange in High-Energy Elastic Electron-Proton Scattering
M. E. Christy, T. Gautam, L. Ou +167
We present new precision measurements of the elastic electron-proton scattering cross section for momentum transfer (Q) up to 15.75~\gevsq. Combined with existing data, these p…
Novel observation of isospin structure of short-range correlations in calcium isotopes
D. Nguyen, Z. Ye, P. Aguilera +101
Short Range Correlations (SRCs) have been identified as being responsible for the high momentum tail of the nucleon momentum distribution, n(k). Hard, short-range interactions of n…
Probing few-body nuclear dynamics via 3H and 3He (e,e'p)pn cross-section measurements
R. Cruz-Torres, D. Nguyen, F. Hauenstein +125
We report the first measurement of the \eep three-body breakup reaction cross sections in helium-3 (He) and tritium (H) at large momentum transfer ($\langle Q^2 \rangle \ap…
Probing for high momentum protons in He via the reaction
S. Iqbal, F. Benmokhtar, M. Ivanov +107
Experimental cross sections for the reaction up to a missing momentum of 0.632 GeV/ at and =2(GeV/) are reported. The data are compared to…
Comparing proton momentum distributions in and 3 nuclei via H H and He measurements
R. Cruz-Torres, S. Li, F. Hauenstein +125
We report the first measurement of the reaction cross-section ratios for Helium-3 (He), Tritium (H), and Deuterium (). The measurement covered a missing moment…
Search for three-nucleon short-range correlations in light nuclei
Z. Ye, P. Solvignon, D. Nguyen +100
We present new data probing short-range correlations (SRCs) in nuclei through the measurement of electron scattering off high-momentum nucleons in nuclei. The inclusive 4He/3He cro…
JLab Measurements of the 3He Form Factors at Large Momentum Transfers
A. Camsonne, A. T. Katramatou, M. Olson +66
The charge and magnetic form factors, FC and FM, of 3He have been extracted in the kinematic range 25 fm-2 < Q2 < 61 fm-2 from elastic electron scattering by detecting 3He recoil n…
Electroexcitation of the at low momentum transfer
A. Blomberg, D. Anez, N. Sparveris +92
We report on new p measurements at the resonance at the low momentum transfer region. The mesonic cloud dynamics is predicted to be dominant an…
A precision measurement of the () reaction at threshold
K. Chirapatpimol, M. H. Shabestari, R. A. Lindgren +91
New results are reported from a measurement of electroproduction near threshold using the reaction. The experiment was designed to determine precisely…
Hall A Annual Report 2013
M. M. Dalton, K. Allada, K. Aniol +27
Report over the experimental activities in Hall A at Thomas Jefferson National Accelerator Facility during 2013.
Probing the Repulsive Core of the Nucleon-Nucleon Interaction via the 4He(e,e'pN) Triple-Coincidence Reaction
I. Korover N. Muangma, O. Hen, R. Shneor +115
We studied simultaneously the 4He(e,e'p), 4He(e,e'pp), and 4He(e,e'pn) reactions at Q^2=2 [GeV/c]2 and x_B>1, for a (e,e'p) missing-momentum range of 400 to 830 MeV/c. The knocked-…
JLab Measurement of the He Charge Form Factor at Large Momentum Transfers
A. Camsonne, A. T. Katramatou, M. Olson +66
The charge form factor of $^$4He has been extracted in the range 29 fm fm from elastic electron scattering, detecting He nuclei and electrons in…