Publications (56)
Deeply virtual Compton scattering cross section at high Bjorken
F. Georges, M. N. H. Rashad, A. Stefanko +159
We report high-precision measurements of the Deeply Virtual Compton Scattering (DVCS) cross section at high values of the Bjorken variable . DVCS is sensitive to the Generaliz…
Moments of the neutron structure function at intermediate
P. Solvignon, N. Liyanage, J. -P. Chen +59
We present new experimental results of the He spin structure function in the resonance region at values between 1.2 and 3.0 (GeV/c). Spin dependent moments of t…
d(e,e'p) Studies of Exclusive Deuteron Electro-Disintegration
W. U. Boeglin, P. Ambrozewicz, K. Aniol +67
The d(e,e'p) cross section was measured at momentum transfers 0.8, 2.1 and 3.5 covering a wide range of proton kinematics at each setting that made it po…
Separated Response Functions in Exclusive, Forward Electroproduction on Deuterium
G. M. Huber, H. P. Blok, C. Butuceanu +86
Background: Measurements of forward exclusive meson production at different squared four-momenta of the exchanged virtual photon, , and at different four-momentum transfer, t,…
Precision Rosenbluth measurement of the proton elastic form factors
I. A. Qattan, J. Arrington, R. E. Segel +49
We report the results of a new Rosenbluth measurement of the proton form factors at Q^2 values of 2.64, 3.20 and 4.10 GeV^2. Cross sections were determined by detecting the recoili…
Deuteron Electro-Disintegration at Very High Missing Momenta
W. U. Boeglin, M. K. Jones, K. Aniol +26
We propose to measure the D(e,e'p) cross section at (GeV/c) and for missing momenta ranging from GeV/c to GeV/c expanding t…
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…
Backward-angle Exclusive pi0 Production above the Resonance Region
W. B. Li, G. M. Huber, J. R. Stevens +59
The proposed measurement is a dedicated study of the exclusive electroproduction process,1H(e,e'p)pi0, in the backward-angle regime (u-channel process) above the resonance region.…
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…
Double Spin Asymmetries of Inclusive Hadron Electroproductions from a Transversely Polarized Target
The Jefferson Lab Hall A Collaboration, Y. X. Zhao, K. Allada +114
We report the measurement of beam-target double-spin asymmetries () in the inclusive production of identified hadrons, +$~^3\text{He}^{\uparrow}\rightarrow h…
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.
Measurement of the Neutron Radius of 208Pb Through Parity-Violation in Electron Scattering
S. Abrahamyan, Z. Ahmed, H. Albataineh +132
We report the first measurement of the parity-violating asymmetry A_PV in the elastic scattering of polarized electrons from 208Pb. A_PV is sensitive to the radius of the neutron d…
Quark-Hadron Duality in Neutron (3He) Spin Structure
P. Solvignon, N. Liyanage, J. -P. Chen +59
We present experimental results of the first high-precision test of quark-hadron duality in the spin-structure function g_1 of the neutron and He using a polarized 3He target i…
Separated Response Function Ratios in Exclusive, Forward pi^{+/-} Electroproduction
G. M. Huber, H. P. Blok, C. Butuceanu +85
The study of exclusive electroproduction on the nucleon, including separation of the various structure functions, is of interest for a number of reasons. The ratio $R_L=…
Unique Access to u-Channel Physics: Exclusive Backward-Angle Omega Meson Electroproduction
W. B. Li, G. M. Huber, H. P. Blok +53
Backward-angle meson electroproduction above the resonance region, which was previously ignored, is anticipated to offer unique access to the three quark plus sea component of the…
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-…
Backward-angle electroproduction of mesons off protons at and
T. Akiyama, P. Bydžovský, T. Gogami +83
The electroproduction of mesons from a target at , and $\cos θ^{\text{CM}}_{γ^{*}η'} \app…
Measurement of the Target-Normal Single-Spin Asymmetry in Deep-Inelastic Scattering from the Reaction
J. Katich, X. Qian, Y. X. Zhao +113
We report the first measurement of the target-normal single-spin asymmetry in deep-inelastic scattering from the inclusive reaction He on a pola…
The cross-section measurement for the reaction
K. N. Suzuki, T. Gogami, B. Pandey +80
The small binding energy of the hypertrition leads to predictions of non-existence of bound hypernuclei for isotriplet three-body systems such as . However, invariant mass sp…
Quasielastic 12C(e,e'p) Reaction at High Momentum Transfer
J. H. Morrison, H. Baghaei, W. Bertozzi +22
We measured the 12C(e,e'p) cross section as a function of missing energy in parallel kinematics for (q,w) = (970 MeV/c, 330 MeV) and (990 MeV/c, 475 MeV). At w=475 MeV, at the maxi…
Inclusive studies of two- and three-nucleon short-range correlations in H and He
S. Li, S. N. Santiesteban, J. Arrington +113
Inclusive electron scattering at carefully chosen kinematics can isolate scattering from the high-momentum nucleons in short-range correlations (SRCs). SRCs are produced by the har…
Probing few-body nuclear dynamics via 3H and 3He (e,e'p)pn cross-section measurements
R. Cruz-Torres, D. Nguyen, F. Hauenstein +125
We report the first measurement of the \eep three-body breakup reaction cross sections in helium-3 (He) and tritium (H) at large momentum transfer ($\langle Q^2 \rangle \ap…
New Measurements of the Beam-Normal Single Spin Asymmetry in Elastic Electron Scattering Over a Range of Spin-0 Nuclei
PREX, CREX Collaborations, : +104
We report precision determinations of the beam normal single spin asymmetries () in the elastic scattering of 0.95 and 2.18~GeV electrons off C, Ca, Ca, a…
Accurate Determination of the Neutron Skin Thickness of Pb through Parity-Violation in Electron Scattering
D. Adhikari, H. Albataineh, D. Androic +98
We report a precision measurement of the parity-violating asymmetry in the elastic scattering of longitudinally polarized electrons from Pb. We measure $A_{PV}=550…
Exclusive electroproduction off the proton from low to high -t
S. Basnet, G. M. Huber, W. B. Li +49
Background: Measurements of exclusive meson production are a useful tool in the study of hadronic structure. In particular, one can discern the relevant degrees of freedom at diffe…
Hall A Annual Report 2012
S. Riordan, C. Keppel, K. Aniol +46
Report over the experimental activities in Hall A at Thomas Jefferson National Accelerator Facility.
New Measurements of the Transverse Beam Asymmetry for Elastic Electron Scattering from Selected Nuclei
The HAPPEX, PREX Collaborations, : +195
We have measured the beam-normal single-spin asymmetry in the elastic scattering of 1-3 GeV transversely polarized electrons from H and for the first time from He, $^…
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, $^…
Revealing the short-range structure of the "mirror nuclei" H and He
S. Li, R. Cruz-Torres, N. Santiesteban +113
When protons and neutrons (nucleons) are bound into atomic nuclei, they are close enough together to feel significant attraction, or repulsion, from the strong, short-distance part…
Measurement of the 12C(e,e'p)11B Two-Body Breakup Reaction at High Missing Momentum Values
P. Monaghan, R. Shneor, R. Subedi +81
The five-fold differential cross section for the 12C(e,e'p)11B reaction was determined over a missing momentum range of 200-400 MeV/c, in a kinematics regime with Bjorken x > 1 and…
Charged pion form factor between Q^2=0.60 and 2.45 GeV^2. II. Determination of, and results for, the pion form factor
G. M. Huber, H. P. Blok, T. Horn +83
The charged pion form factor, Fpi(Q^2), is an important quantity which can be used to advance our knowledge of hadronic structure. However, the extraction of Fpi from data requires…
Separated Kaon Electroproduction Cross Section and the Kaon Form Factor from 6 GeV JLab Data
M. Carmignotto, S. Ali, K. Aniol +57
The () reaction was studied as a function of the Mandelstam variable using data from the E01-004 (FPI-2) and E93-018 experiments that were carried o…
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…
Single Spin Asymmetries in Charged Kaon Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized Target
Y. X. Zhao, Y. Wang, K. Allada +113
We report the first measurement of target single spin asymmetries of charged kaons produced in semi-inclusive deep inelastic scattering of electrons off a transversely polarized $^…
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…
Measurement of the Nucleon Structure Function Ratio by the Jefferson Lab MARATHON Tritium/Helium-3 Deep Inelastic Scattering Experiment
MARATHON Collaboration, D. Abrams, H. Albataineh +129
The ratio of the nucleon structure functions, , is determined by the MARATHON experiment from measurements of deep inelastic scattering of electrons from H a…
Beam-Target Double Spin Asymmetry A_LT in Charged Pion Production from Deep Inelastic Scattering on a Transversely Polarized He-3 Target at 1.4<Q^2<2.7 GeV^2
J. Huang, K. Allada, C. Dutta +112
We report the first measurement of the double-spin asymmetry for charged pion electroproduction in semi\nobreakdash-inclusive deep\nobreakdash-inelastic electron scatterin…
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…
Hall A Annual Report 2014
M. M. Dalton, E. Chudakov, J. Gomez +20
Report of the experimental activities in Hall A at Thomas Jefferson National Accelerator Facility during 2013.
Determination of the Charged Pion Form Factor at Q2=1.60 and 2.45 (GeV/c)2
Fpi2 collaboration, T. Horn, K. Aniol +51
The H(e,e'pi+)n cross section was measured at four-momentum transfers of Q2=1.60 and 2.45 GeV2 at an invariant mass of the photon nucleon system of W=2.22 GeV. The charged pion for…
A novel measurement of the neutron magnetic form factor from A=3 mirror nuclei
S. N. Santiesteban, S. Li, D. Abrams +103
The electromagnetic form factors of the proton and neutron encode information on the spatial structure of their charge and magnetization distributions. While measurements of the pr…
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…
First measurement of unpolarized SIDIS cross section and cross section ratios from a He target
X. Yan, K. Allada, K. Aniol +114
The unpolarized semi-inclusive deep-inelastic scattering (SIDIS) differential cross sections in He() have been measured for the first time in Jefferson…
Electroproduction of the Lambda/Sigma^0 hyperons at Q^2~0.5 (GeV/c)^2 at forward angles
K. Okuyama, K. Itabashi, S. Nagao +83
In 2018, the E12-17-003 experiment was conducted at the Thomas Jefferson National Accelerator Facility (JLab) to explore the possible existence of an nnLambda state in the reconstr…
Probing Cold Dense Nuclear Matter
R. Subedi, R. Shneor, P. Monaghan +62
The protons and neutrons in a nucleus can form strongly correlated nucleon pairs. Scattering experiments, where a proton is knocked-out of the nucleus with high momentum transfer a…
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…
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 precisel…
Single Spin Asymmetries in Charged Pion Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized He Target
X. Qian, K. Allada, C. Dutta +112
We report the first measurement of target single spin asymmetries in the semi-inclusive reaction on a transversely polarized target. The experiment, conducted…
Charged pion form factor between =0.60 and 2.45 GeV. I. Measurements of the cross section for the H() reaction
H. P. Blok, T. Horn, G. M. Huber +84
Cross sections for the reaction H() were measured in Hall C at Thomas Jefferson National Accelerator Facility (JLab) using the CEBAF high-intensity, continous el…
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…
A Search for the LHCb Charmed 'Pentaquark' using Photo-Production of at Threshold in Hall C at Jefferson Lab
Z. -E. Meziani, S. Joosten, M. Paolone +56
We propose to measure the photo-production cross section of near threshold, in search of the recently observed LHCb hidden-charm resonances (4380) and (4450) consi…
Deep exclusive electroproduction of at high in the quark valence regime
The Jefferson Lab Hall A Collaboration, M. Dlamini, B. Karki +159
We report measurements of the exclusive neutral pion electroproduction cross section off protons at large values of (0.36, 0.48 and 0.60) and (3.1 to 8.4 GeV) obtai…
High precision measurements of the proton elastic electromagnetic form factors and their ratio at = 0.50, 2.64, 3.20, and 4.10 GeV
I. A. Qattan, J. Arrington, K. Aniol +37
The advent of high-intensity, high-polarization electron beams led to significantly improved measurements of the ratio of the proton's charge to electric form factors, GEp/GMp. How…
Measurement of pretzelosity asymmetry of charged pion production in Semi-Inclusive Deep Inelastic Scattering on a polarized He target
Y. Zhang, X. Qian, K. Allada +112
An experiment to measure single-spin asymmetries in semi-inclusive production of charged pions in deep-inelastic scattering on a transversely polarized He target was performed…
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…
Single Spin Asymmetries of Inclusive Hadrons Produced in Electron Scattering from a Transversely Polarized He Target
K. Allada, Y. X. Zhao, K. Aniol +113
We report the first measurement of target single-spin asymmetries (A) in the inclusive hadron production reaction, +, using a transv…