New parton distributions from large-x and low-Q^2 data (2009)
Accardi, A., Christy, M. E., Keppel, C. E., Monaghan, P., Melnitchouk, W., Morfin, J. G., ...
We report results of a new global next-to-leading order fit of parton distribution functions in which cuts on W and Q are relaxed, thereby including more data at high values of x. Effects of target...
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
Nachtmann Moments of the Proton and Deuteron Spin Structure Functions (2008)
Slifer, K., Rondon, O. A., Aghalaryan, A., Ahmidouch, A., Asaturyan, R., Bloch, F., ...
We perform a Nachtmann moment analysis of our measured proton and deuteron spin structure functions g1 and g2 in the resonance region at intermediate four momentum transfer. This analysis is the...
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,...
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,...
Quark-hadron duality and truncated moments of nucleon structure functions (2008)
Psaker, A., Melnitchouk, W., Christy, M. E., Keppel, C.
We employ a novel new approach to study local quark-hadron duality using "truncated" moments, or integrals of structure functions over restricted regions of x, to determine the degree to which...
Empirical Fit to Precision Inclusive Electron-Proton Cross Sections in the Resonance Region (2007)
An empirical fit is described to measurements of inclusive inelastic electron-proton cross sections in the kinematic range of four-momentum transfer $0 \le Q^2
An empirical fit is described to measurements of inclusive inelastic electron-deuteron cross sections in the kinematic r ange of four-momentum transfer $0 \le Q^2
Transverse momentum dependence of semi-inclusive pion production (2007)
Mkrtchyan, H., Bosted, P. E., Adams, G. S., Ahmidouch, A., Angelescu, T., Arrington, J., ...
Cross sections for semi-inclusive electroproduction of charged pions ($\pi^{\pm}$) from both proton and deuteron targets were measured for $0.2
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...
Double radiative pion capture on hydrogen and deuterium and the nucleon's pion cloud (2007)
Tripathi, S., Armstrong, D. S., Christy, M. E., Clark, J. H. D., Gorringe, T. P., Hasinoff, M. D., ...
We report measurements of double radiative capture in pionic hydrogen and pionic deuterium. The measurements were performed with the RMC spectrometer at the TRIUMF cyclotron by recording photon pairs...
Proton Spin Structure in the Resonance Region (2006)
Slifer, K., Tajima, S., Aghalaryan, A., Ahmidouch, A., Asaturyan, R., ...
We have examined the spin structure of the proton in the region of the nucleon resonances (1.085 GeV < W < 1.910 GeV) at an average four momentum transfer of Q^2 = 1.3 GeV^2. Using the Jefferson Lab...
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...
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...
Q^2 Evolution of Generalized Baldin Sum Rule for the Proton (2004)
Liang, Y., Christy, M. E., Ent, R., Keppel, C. E.
The generalized Baldin sum rule for virtual photon scattering, the unpolarized analogy of the generalized Gerasimov-Drell-Hearn integral, provides an important way to investigate the transition...
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...
Higher twist analysis of the proton g_1 structure function (2004)
Osipenko, M., Melnitchouk, W., Simula, S., Bosted, P., Burkert, V., Christy, M. E., ...
We perform a global analysis of all available spin-dependent proton structure function data, covering a large range of Q^2, 1 < Q^2 < 30 GeV^2, and calculate the lowest moment of the g_1 structure...
Measurements of electron-proton elastic cross sections for $0.4 < Q^2 < 5.5 (GeV/c)^2$ (2004)
We report on precision measurements of the elastic cross section for electron-proton scattering performed in Hall C at Jefferson Lab. The measurements were made at 28 unique kinematic settings...
Strauch, S., Dieterich, S., Aniol, K.A., Annand, J.R.M., Baker, O.K., Bertozzi, W., ...
We have measured the proton recoil polarization in the He-4((e) over right arrow ,e(')(p) over right arrow)H-4 reaction at Q(2)=0.5, 1.0, 1.6, and 2.6 (GeV/c)(2). The measured ratio of polarization...
Observation of double radiative capture on pionic hydrogen (2002)
Tripathi, S., Armstrong, D. S., Christy, M. E., Clark, J. H. D., Gorringe, T. P., Hasinoff, M. D., ...
We report the first observation of double radiative capture on pionic hydrogen. The experiment was conducted at the TRIUMF cyclotron using the RMC spectrometer, and detected $\gamma$--ray...
Strauch, S., Dieterich, S., Aniol, K.A., Annand, J.R.M., Baker, O.K., Bertozzi, W., ...
We have measured the proton recoil polarization in the He-4((e) over right arrow ,e(')(p) over right arrow)H-4 reaction at Q(2)=0.5, 1.0, 1.6, and 2.6 (GeV/c)(2). The measured ratio of polarization...
Strauch, S., Dieterich, S., Aniol, K.A., Annand, J.R.M., Baker, O.K., Bertozzi, W., ...
We have measured the proton recoil polarization in the He-4((e) over right arrow ,e(')(p) over right arrow)H-4 reaction at Q(2)=0.5, 1.0, 1.6, and 2.6 (GeV/c)(2). The measured ratio of polarization...