Probing Cold Dense Nuclear Matter (2009)
Subedi, R., Shneor, R., Monaghan, P., Anderson, B. D., Aniol, K., Annand, J., ...
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 and high missing...
Neutral Pion Electroproduction in the Resonance Region at High $Q^2$ (2009)
Villano, A. N., Stoler, P., Bosted, P. E., Connell, S. H., Dalton, M. M., Jones, M. K., ...
The process $ep \to e^{\prime}p^{\prime}\pi^0$ has been measured at $Q^2$ = 6.4 and 7.7 GeV/c$^2$)$^2$ in Jefferson Lab's Hall C. Unpolarized differential cross sections are reported in the virtual...
New measurements of the EMC effect in very light nuclei (2009)
Seely, J., Daniel, A., Gaskell, D., Arrington, J., Fomin, N., Solvignon, P., ...
New Jefferson Lab data are presented on the nuclear dependence of the inclusive cross section from 2H, 3He, 4He, 9Be and 12C for 0.3
Blok, H. P., Horn, T., Huber, G. M., Beise, E. J., Gaskell, D., Mack, D. J., ...
Cross sections for the reaction ${^1}$H($e,e'\pi^+$)$n$ were measured in Hall C at Thomas Jefferson National Accelerator Facility (JLab) using the CEBAF high-intensity, continous electron beam in...
Huber, G. M., Blok, H. P., Horn, T., Beise, E. J., Gaskell, D., Mack, D. J., ...
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 a model of the...
Search for Sub-threshold Photoproduction of J/Psi Mesons (2008)
Bosted, P., Dunne, J., Lee, C. A., Junnarkar, P., Arrington, J., Asaturyan, R., ...
A search was made for sub-threshold $J/\psi$ production from a carbon target using a mixed real and quasi-real Bremsstrahlung photon beam with an endpoint energy of 5.76 GeV. No events were observed,...
Neutron Structure Functions (2008)
Arrington, J., Coester, F., Holt, R. J., Lee, T. -S. H.
Neutron structure functions can be extracted from proton and deuteron data and a representation of the deuteron structure. This procedure does not require DIS approximations or quark structure...
Electroproduction of Eta Mesons in the S11(1535) Resonance Region at High Momentum Transfer (2008)
Dalton, M. M., Adams, G. S., Ahmidouch, A., Angelescu, T., Arrington, J., Asaturyan, R., ...
The differential cross-section for the process p(e,e'p)eta has been measured at Q2 ~ 5.7 and 7.0 (GeV/c)2 for centre-of-mass energies from threshold to 1.8 GeV, encompassing the S11(1535) resonance,...
Transverse momentum dependence of semi-inclusive pion production (2007)
Mkrtchyan, H., Bosted, P. E., Adams, G. S., Ahmidouch, A., Angelescu, T., Arrington, J., ...
Cross sections for semi-inclusive electroproduction of charged pions ($\pi^{\pm}$) from both proton and deuteron targets were measured for $0.2
Quasifree Lambda, Sigma^0, and Sigma^- electroproduction from 1,2H, 3,4He, and carbon (2007)
Dohrmann, F., Ahmidouch, A., Armstrong, C. S., Arrington, J., Asaturyan, R., Avery, S., ...
Kaon electroproduction from light nuclei and hydrogen, using 1H, 2H, 3He, 4He, and Carbon targets has been measured at Jefferson Laboratory. The quasifree angular distributions of Lambda and Sigma...
Global analysis of proton elastic form factor data with two-photon exchange corrections (2007)
Arrington, J., Melnitchouk, W., Tjon, J. A.
We use the world's data on elastic electron--proton scattering and calculations of two-photon exchange effects to extract corrected values of the proton's electric and magnetic form factors over the...
Jiang, X., Arrington, J., Benmokhtar, F., Camsonne, A., Chen, J. P., Choi, S., ...
We measured the angular dependence of the three recoil proton polarization components in two-body photodisintegration of the deuteron at a photon energy of 2 GeV. These new data provide a benchmark...
Precision Measurements of the Nucleon Strange Form Factors at Q^2 ~0.1 GeV^2 (2007)
Acha, A., Aniol, K.A., Armstrong, D.S., Arrington, J., Averett, T., Bailey, S., ...
We report new measurements of the parity-violating asymmetry A_PV in elastic scattering of 3 GeV electrons off hydrogen and 4He targets with ~6.0 degrees. The 4He result is A_PV = (+6.40 +/- 0.23...
Investigation of proton-proton short-range correlations via the $^{12}$C(e,e'pp) reaction (2007)
Shneor, R., Monaghan, P., Subedi, R., D. Anderson, B., Aniol, K., Annand, J., ...
We investigated simultaneously the 12C(e,e'p) and 12C(e,e'pp) reactions at Q2 = 2 [GeV/c]2, x_B = 1.2, and in an (e,e'p) missing-momentum range from 300 to 600 MeV/c. At these kinematics, with a...
Precision Rosenbluth measurement of the proton elastic form factors (2007)
Qattan, I. A., Arrington, J., Segel, R. E., Zheng, X., Aniol, K., Baker, O. K., ...
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 recoiling proton in...
Angular dependence of recoil proton polarization in high-energy \gamma d \to p n (2007)
Jiang, X., Arrington, J., Benmokhtar, F., Camsonne, A., Chen, J. P., Choi, S., ...
We measured the angular dependence of the three recoil proton polarization components in two-body photodisintegration of the deuteron at a photon energy of 2 GeV. These new data provide a benchmark...
New Measurements of the EMC Effect in Few-Body Nuclei (2007)
Measurements of the EMC effect show that the quark distributions in nuclei are not simply the sum of the quark distributions of the constituent nucleons. However, interpretation of the EMC effect is...
Measurement of nuclear transparency for the A(e,e 'pi(+)) reaction (2007)
CLASIE, B, QIAN, X, ARRINGTON, J, ASATURYAN, R, BENMOKHTAR, F, BOEGLIN, W, ...
Nucleon electromagnetic form factors (2006)
Arrington, J., Roberts, C. D., Zanotti, J. M.
Elastic electromagnetic nucleon form factors have long provided vital information about the structure and composition of these most basic elements of nuclear physics. The form factors are a...
A Search for Sigma^0_5, N^0_5 and Theta^++ Pentaquark States (2006)
Qiang, Y., Annand, J., Arrington, J., Azimov, Ya. I., Bertozzi, W., Cates, G., ...
A high-resolution (sigma_instr. = 1.5 MeV) search for narrow states (Gamma < 10 MeV) with masses of M_x approx 1500-1850 MeV in ep -> e'K^+ X, e'K^- X and e' pi^+ X electroproduction at small angles...
Determination of the pion charge form factor for Q^2=0.60-1.60 GeV^2 (2006)
Blok, H. P., Huber, G. M., Abbott, D., Anklin, H., Armstrong, C., ...
The data analysis for the reaction H(e,e' pi^+)n, which was used to determine values for the charged pion form factor Fpi for values of Q^2=0.6-1.6 GeV^2, has been repeated with careful inspection of...
Determination of the Charged Pion Form Factor at Q2=1.60 and 2.45 (GeV/c)2 (2006)
Aniol, K., Arrington, J., Barrett, B., Beise, E. J., Blok, H. P., ...
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 form factor (F_pi) was...
A new parameterization of the nucleon elastic form factors (2006)
Bradford, R., Bodek, A., Budd, H., Arrington, J.
The nucleon elastic form factors are generally interpreted as a mapping of the charge and magnetic current distributions of the proton and neutron. New high Q^2 measurements have opened up...
Tvaskis, V., Arrington, J., Christy, M. E., Ent, R., Keppel, C. E., Liang, Y., ...
The effects of two-photon exchange corrections, suggested to explain the difference between measurements of the proton elastic electromagnetic form factors using the polarization transfer and...
Moments of nuclear and nucleon structure functions at low Q^2 and the momentum sum rule (2005)
Niculescu, I., Arrington, J., Ent, R., Keppel, C. E.
New nuclear structure function data from Jefferson Lab covering the higher x and lower Q^2 regime make it possible to extract the higher order F_2 moments for iron and deuterium at low four-momentum...
Vector and Axial Form Factors Applied to Neutrino Quasielastic Scattering (2004)
Budd, H., Bodek, A., Arrington, J.
We calculate the quasielastic cross sections for neutrino scattering on nucleons using up to date fits to the nucleon elastic electromagnetic form factors GEp, GEn, GMp, GMn, and weak form factors....
Precision Rosenbluth measurement of the proton elastic form factors (2004)
Qattan, I. A., Arrington, J., Segel, R. E., Zheng, X., Aniol, K., Baker, O. K., ...
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 recoiling proton in...
Extraction of two-photon contributions to the proton form factors (2004)
Significant discrepancies have been observed between proton form factors as measured by Rosenbluth separation and polarization transfer techniques. There are indications that this difference may be...
Arrington, J., Dmitriev, V. F., Holt, R. J., Nikolenko, D. M., Rachek, I. A., Shestakov, Yu. V., ...
It has been suggested that two-photon exchange corrections could explain the discrepancy between Rosenbluth extractions of the proton form factors and recent polarization transfer measurements. We...
Basic instrumentation for Hall A at Jefferson Lab (2004)
Alcorn, J., Anderson, B.D., Aniol, K.A., Annand, J.R.M., Auerbach, L., Arrington, J., ...
Basic instrumentation for Hall A at Jefferson Lab (2004)
Alcorn, J., Anderson, B.D., Aniol, K.A., Annand, J.R.M., Auerbach, L., Arrington, J., ...
Basic instrumentation for Hall A at Jefferson Lab (2004)
Alcorn, J., Anderson, B.D., Aniol, K.A., Annand, J.R.M., Auerbach, L., Arrington, J., ...
The instrumentation in Hall A at the Thomas Jefferson National Accelerator Facility was designed to study electro-and photo- induced reactions at very high luminosity and good momentum and angular...
New measurement of G_E/G_M for the proton (2003)
Recent polarization transfer measurements of the proton form factors disagree with previous Rosenbluth extractions. In addition to providing insight into the proton structure, the form factors also...
The comparison of positron-proton and electron-proton elastic scattering cross sections is a sensitive test for the presence of two-photon exchange contributions. Thirty years ago, positron data were...
Implications of the discrepancy between proton form factor measurements (2003)
Recent polarization transfer measurements of the proton electromagnetic form factors yield very different results from previous Rosenbluth extractions. This inconsistency implies uncertainties in our...
Modeling Neutrino Quasielastic Cross Sections on Nucleons and Nuclei (2003)
Bodek, A., Budd, H., Arrington, J.
We calculate the total and differential quasielastic cross sections for neutrino and antineutrino scattering on nucleons using up to date fits to the nucleon elastic electromagnetic form factors...
Modeling Quasi-elastic Form Factors for Electron and Neutrino Scattering (2003)
Budd, H., Bodek, A., Arrington, J.
We calculate the total and differential quasielastic cross sections for neutrino and antineutrino scattering on nucleons using up to date fits to the nucleon elastic electromagnetic form factors...
Low-Q scaling, duality, and the EMC effect (2003)
Arrington, J., Ent, R., Keppel, C. E., Mammei, J., Niculescu, I.
High energy lepton scattering has been the primary tool for mapping out the quark distributions of nucleons and nuclei. Data on the proton and deuteron have shown that there is a fundamental...
Inclusive electron scattering from nuclei at low momentum transfer (corresponding to x>1) and moderate Q^2 is dominated by quasifree scattering from nucleons. In the impulse approximation, the cross...
How well do we know the electromagnetic form factors of the proton? (2003)
Several experiments have extracted proton electromagnetic form factors from elastic cross section measurements using the Rosenbluth technique. Global analyses of these measurements indicate...
Do Ordinary Nuclei Contain Exotic States of Matter? (2003)
The strongly repulsive core of the short-range nucleon-nucleon interaction leads to the existence of high-momentum nucleons in nuclei. Inclusive electron scattering can be used to probe these...
Mohring, R.M., Abbott, D., Ahmidouch, A., Amatuni, T.A., Ambrozewicz, P., Angelescu, T., ...
We report measurements of cross sections for the reaction p(e,e'K)Y, for both the Lambda and Sigma_0 hyperon states, at an invariant mass of W=1.84 GeV and four-momentum transfers 0.5
Mohring, R.M., Abbott, D., Ahmidouch, A., Amatuni, T.A., Ambrozewicz, P., Angelescu, T., ...
We report measurements of cross sections for the reaction p(e,e'K)Y, for both the Lambda and Sigma_0 hyperon states, at an invariant mass of W=1.84 GeV and four-momentum transfers 0.5
Mohring, R.M., Abbott, D., Ahmidouch, A., Amatuni, T.A., Ambrozewicz, P., Angelescu, T., ...
We report measurements of cross sections for the reaction p(e,e'K)Y, for both the Lambda and Sigma_0 hyperon states, at an invariant mass of W=1.84 GeV and four-momentum transfers 0.5
Mohring, R.M., Abbott, D., Ahmidouch, A., Amatuni, T.A., Ambrozewicz, P., Angelescu, T., ...
We report measurements of cross sections for the reaction p(e,e'K)Y, for both the Lambda and Sigma_0 hyperon states, at an invariant mass of W=1.84 GeV and four-momentum transfers 0.5
Mohring, R.M., Abbott, D., Ahmidouch, A., Amatuni, T.A., Ambrozewicz, P., Angelescu, T., ...
We report measurements of cross sections for the reaction p(e,e'K)Y, for both the Lambda and Sigma_0 hyperon states, at an invariant mass of W=1.84 GeV and four-momentum transfers 0.5
Hadrons in the Nuclear Medium (2002)
Sargsian, M. M., Arrington, J., Bertozzi, W., Boeglin, W., Carlson, C. E., Day, D. B., ...
Quantum Chromodynamics, the microscopic theory of strong interactions, has not yet been applied to the calculation of nuclear wave functions. However, it certainly provokes a number of specific...
How Well Do We Know the Electromagnetic Form Factors of the Proton? (2002)
Recent measurements of recoil polarization in elastic scattering have been used to extract the ratio of the electric to the magnetic proton form factors. These results disagree with Rosenbluth...
Recent recoil polarization measurements in Hall A at Jefferson Lab show that the ratio of the electric to magnetic form factors for the proton decreases significantly with increasing Q^2. This...
Nuclear transparency from quasielastic A(e,e^{'}p) reactions up to Q^{2}=8.1 (GeV/c)^{2} (2002)
Ahmidouch, A., Armstrong, C.S., Arrington, J., Asaturyan, R., Avery, S., Baker, O.K., ...
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Arrington, J., Aschenauer, E.C., ...
Evidence for a positive longitudinal double-spin asymmetry (A/sub 1//sup rho /)=0.24+or-0.11/sub stat/+or-0.02/sub syst/ in the cross section for exclusive diffractive rho /sup 0/(770) vector-meson...
x- and xi-scaling of the Nuclear Structure Function at Large x (2001)
Arrington, J., Armstrong, C. S., Averett, T., Baker, O. K., De Bever, L., Bochna, C. W., ...
Inclusive electron scattering data are presented for ^2H and Fe targets at an incident electron energy of 4.045 GeV for a range of momentum transfers from Q^2 = 1 to 7 (GeV/c)^2. Data were taken at...
Hadron formation in deep-inelastic positron scattering in a nuclear environment (2001)
Airapetian, A., Akopov, N., Akopov, Z., Akushevich, I., Amarian, T., Arrington, J., ...
The influence of the nuclear medium on the production of charged hadrons in semi-inclusive deep-inelastic scattering has been studied by the HERMES experiment at DESY using a 27.5 GeV positron beam....
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Arrington, J., Aschenauer, E.C., ...
Measurements of the individual multiplicities of pi /sup +/, pi /sup -/ and pi /sup 0/ produced in the deep-inelastic scattering of 27.5 GeV positrons on hydrogen are presented. The average charged...
Longitudinal Electroproduction of Charged Pions from 1H, 2H, and 3He (2001)
Ahmidouch, A., Ambrozewicz, P., Anklin, H., Arrington, J., Gaskell, D.
Measurement of the Charged Pion Electromagnetic Form Factor (2001)
Abbott, D., Anklin, H., Armstrong, C., Arrington, J., Assamagan, K., Avery, S., ...
Experimental Verification of Quark-Hadron Duality (2000)
Niculescu, I., Armstrong, C. S., Arrington, J., Assamagan, K. A., Baker, O. K., Beck, D. H., ...
A newly obtained sample of inclusive electron-nucleon scattering data has been analyzed for precision tests of quark-hadron duality. The data are in the nucleon resonance region, and span the range...
Exclusive Leptoproduction of (2000)
Mesons From Hydrogen, A. Airapetian, N. Akopov, I. Akushevich, M. Amarian, J. Arrington, ...
. Measurements of the cross section for exclusive virtual-photoproduction of ae 0 mesons from hydrogen are reported. The data were collected by the HERMES experiment using 27.5 GeV positrons incident...
Inclusive Electron-Nucleus Scattering at Large Momentum Transfer (1998)
Inclusive electron scattering is measured with 4.045 GeV incident beam energy from C, Fe and Au targets. The measured energy transfers and angles correspond to a kinematic range for Bjorken $x > 1$...
SAMPLE: Parity Violating Electron Scattering from Hydrogen and Deuterium (1996)
Beise, E. J., Arrington, J., Beck, D. H., Candell, E., Carr, R., Dodson, G., ...
Recently, there has been considerable theoretical interest in determining strange quark contributions to hadronic matrix elements. Such matrix elements can be accessed through the nucleon's neutral...
Jones, C. E., Arrington, J., Beise, E. J., Bray, B., Carr, R. W., Filippone, B. W., ...
We present the results of a measurement of the spin-dependent asymmetry in 3→(e→,e′) inelastic scattering at kinematics on the low-energy transfer side of the quasielastic peak, including the...
Exclusive Electron Scattering from Deuterium at High Momentum Transfer (1995)
Bulten, H. J., Anthony, P. L., Arnold, R. G., Arrington, J., Beise, E. J., Belz, E., ...
Cross sections are presented for the reaction 2H(e,e′p)n for momentum transfers in the range 1.2≤Q^2≤6.8 (GeV/c)^2 and for missing momenta from 0 to 250 MeV/c. The longitudinal-transverse...
Inclusive Electron Scattering from Nuclei at $x \simeq 1$ (1995)
Arrington, J., Anthony, P., Arnold, R. G., Beise, E. J., Belz, J. E., Bosted, P. E., ...
The inclusive A(e,e') cross section for $x \simeq 1$ was measured on $^2$H, C, Fe, and Au for momentum transfers $Q^2$ from 1-7 (GeV/c)$^2$. The scaling behavior of the data was examined in the...
Transverse-Longitudinal Asymmetry in the Quasielastic 3He→(e→, e′) Reaction (1995)
Titko, M. A., DeSchepper, D., Dodson, G., Donnelly, T. W., Ent, K. Dow R., ...
The transverse-longitudinal asymmetry ATL′ in 3He→(e→, e′) quasielastic scattering at momentum transfer Q2=0.14 (GeV/c)^2 has been measured to be 1.52 ± 0.55(stat) ± 0.15(syst)%. The plane...
Gao, H., Arrington, J., Beise, E. J., Bray, B., Carr, R. W., Filippone, B. W., ...
We report a measurement of the asymmetry in spin-dependent quasielastic scattering of longitudinally polarized electrons from a polarized 3He target. The neutron magnetic form factor GM^n has been...
Double-spin asymmetry in the cross section for exclusive rho0 production in lepton-proton scattering
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Arrington, J., Aschenauer, E.C., ...
Evidence for a positive longitudinal double-spin asymmetry (A/sub 1//sup rho /)=0.24+or-0.11/sub stat/+or-0.02/sub syst/ in the cross section for exclusive diffractive rho /sup 0/(770) vector-meson...
Hadron formation in deep-inelastic positron scattering in a nuclear environment
Airapetian, A., Akopov, N., Akopov, Z., Akushevich, I., Amarian, T., Arrington, J., ...
The influence of the nuclear medium on the production of charged hadrons in semi-inclusive deep-inelastic scattering has been studied by the HERMES experiment at DESY using a 27.5 GeV positron beam....
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Arrington, J., Aschenauer, E.C., ...
Measurements of the individual multiplicities of pi /sup +/, pi /sup -/ and pi /sup 0/ produced in the deep-inelastic scattering of 27.5 GeV positrons on hydrogen are presented. The average charged...
Basic instrumentation for Hall A at Jefferson Lab
Alcorn, J., Anderson, B.D., Aniol, K.A., Annand, J.R.M., Auerbach, L., Arrington, J., ...
The instrumentation in Hall A at the Thomas Jefferson National Accelerator Facility was designed to study electro-and photo- induced reactions at very high luminosity and good momentum and angular...
Gräser, Y, Volovsek, M, Arrington, J, Schönian, G, Presber, W, Mitchell, T G, ...
The life history of Candida albicans presents an enigma: this species is thought to be exclusively asexual, yet strains show extensive phenotypic variation. To address the population genetics of C....
Gräser, Y, Volovsek, M, Arrington, J, Schönian, G, Presber, W, Mitchell, T G, ...
The life history of Candida albicans presents an enigma: this species is thought to be exclusively asexual, yet strains show extensive phenotypic variation. To address the population genetics of C....
Double-spin asymmetry in the cross section for exclusive rho0 production in lepton-proton scattering
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Arrington, J., Aschenauer, E.C., ...
Evidence for a positive longitudinal double-spin asymmetry (A/sub 1//sup rho /)=0.24+or-0.11/sub stat/+or-0.02/sub syst/ in the cross section for exclusive diffractive rho /sup 0/(770) vector-meson...
Hadron formation in deep-inelastic positron scattering in a nuclear environment
Airapetian, A., Akopov, N., Akopov, Z., Akushevich, I., Amarian, T., Arrington, J., ...
The influence of the nuclear medium on the production of charged hadrons in semi-inclusive deep-inelastic scattering has been studied by the HERMES experiment at DESY using a 27.5 GeV positron beam....
Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Arrington, J., Aschenauer, E.C., ...
Measurements of the individual multiplicities of pi /sup +/, pi /sup -/ and pi /sup 0/ produced in the deep-inelastic scattering of 27.5 GeV positrons on hydrogen are presented. The average charged...
Basic instrumentation for Hall A at Jefferson Lab
Alcorn, J., Anderson, B.D., Aniol, K.A., Annand, J.R.M., Auerbach, L., Arrington, J., ...
The instrumentation in Hall A at the Thomas Jefferson National Accelerator Facility was designed to study electro-and photo- induced reactions at very high luminosity and good momentum and angular...