Scientific Commons: J. P. Chen

Determination of the effective strong coupling constant alpha_{s,g_1}(Q^2) from CLAS spin structure function data (2008)

Deur, A., Burkert, V., Chen, J. P., Korsch, W.

We present a new extraction of the effective strong coupling constant \alpha_{s,g_1}(Q^2). The result agrees with a previous determination and extends the measurement of the low and high Q^2 behavior...

Dynamics of the $^{16}$O(e,e'p) cross section at high missing energies (2007)

Liyanage, N., Anderson, B.D., Aniol, K.A., Auerbach, L., Baker, F.T., Berthot, J., ...

We measured the cross section and response functions (R_L, R_T, and R_LT) for the 16O(e,e'p) reaction in quasielastic kinematics for missing energies 25

$G_{E_p}/G_{M_p}$ ratio by polarization transfer in $\vec{e}p\rightarrow e\vec{p}$ (2007)

Jones, M.K., Aniol, K.A., Baker, F.T., Berthot, J., Bertin, P.Y., Bertozzi, W., ...

The ratio of the proton's elastic electromagnetic form factors was obtained by measuring the transverse and longitudinal polarizations of recoiling protons from the elastic scattering of polarized...

Measurements of the deuteron elastic structure function $A(Q^2)$ for $0.7\leq Q^2\leq 6.0$ (GeV/c)$^2$ at Jefferson Laboratory (2007)

Alexa, L.C., Anderson, B.D., Aniol, K.A., Arundell, K., Auerbach, L., Baker, F.T., ...

The deuteron elastic structure function A(Q^2) has been extracted in the Q^2 range 0.7 to 6.0 (GeV/c)^2 from cross section measurements of elastic electron-deuteron scattering in coincidence using...

Measurements of the deuteron elastic structure function $A(Q^2)$ for $0.7\leq Q^2\leq 6.0$ (GeV/c)$^2$ at Jefferson Laboratory (2007)

Alexa, L.C., Anderson, B.D., Aniol, K.A., Arundell, K., Auerbach, L., Baker, F.T., ...

The deuteron elastic structure function A(Q^2) has been extracted in the Q^2 range 0.7 to 6.0 (GeV/c)^2 from cross section measurements of elastic electron-deuteron scattering in coincidence using...

$G_{E_p}/G_{M_p}$ ratio by polarization transfer in $\vec{e}p\rightarrow e\vec{p}$ (2007)

Jones, M.K., Aniol, K.A., Baker, F.T., Berthot, J., Bertin, P.Y., Bertozzi, W., ...

The ratio of the proton's elastic electromagnetic form factors was obtained by measuring the transverse and longitudinal polarizations of recoiling protons from the elastic scattering of polarized...

Dynamics of the $^{16}$O(e,e'p) cross section at high missing energies (2007)

Liyanage, N., Anderson, B.D., Aniol, K.A., Auerbach, L., Baker, F.T., Berthot, J., ...

We measured the cross section and response functions (R_L, R_T, and R_LT) for the 16O(e,e'p) reaction in quasielastic kinematics for missing energies 25

Measurements of the deuteron elastic structure function $A(Q^2)$ for $0.7\leq Q^2\leq 6.0$ (GeV/c)$^2$ at Jefferson Laboratory (2007)

Alexa, L.C., Anderson, B.D., Aniol, K.A., Arundell, K., Auerbach, L., Baker, F.T., ...

The deuteron elastic structure function A(Q^2) has been extracted in the Q^2 range 0.7 to 6.0 (GeV/c)^2 from cross section measurements of elastic electron-deuteron scattering in coincidence using...

$G_{E_p}/G_{M_p}$ ratio by polarization transfer in $\vec{e}p\rightarrow e\vec{p}$ (2007)

Jones, M.K., Aniol, K.A., Baker, F.T., Berthot, J., Bertin, P.Y., Bertozzi, W., ...

The ratio of the proton's elastic electromagnetic form factors was obtained by measuring the transverse and longitudinal polarizations of recoiling protons from the elastic scattering of polarized...

Dynamics of the $^{16}$O(e,e'p) cross section at high missing energies (2007)

Liyanage, N., Anderson, B.D., Aniol, K.A., Auerbach, L., Baker, F.T., Berthot, J., ...

We measured the cross section and response functions (R_L, R_T, and R_LT) for the 16O(e,e'p) reaction in quasielastic kinematics for missing energies 25

Recoil-proton polarization in high-energy deuteron photodisintegration with circularly polarized photons (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...

Parity-violating electroweak asymmetry in polarized-e p scattering (2007)

Aniol, K.A., Armstrong, D.S., Averett, T., Baylac, M., Burtin, E., Calarco, J., ...

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...

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...

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...

Backward electroproduction of $\pi^0$ mesons on protons in the region of nucleon resonances at four momentum transfer squared $Q^2 = 1.0 GeV^2$ (2006)

Laveissiere, G., Degrande, N., Jaminion, S., Jutier, C., Todor, L., Di Salvo, R., ...

Exclusive electroproduction of pi0 mesons on protons in the backward hemisphere has been studied at Q2=1.0 GeV2 by detecting protons in the forward direction in coincidence with scattered electrons...

Backward electroproduction of $\pi^0$ mesons on protons in the region of nucleon resonances at four momentum transfer squared $Q^2 = 1.0 GeV^2$ (2006)

Laveissiere, G., Degrande, N., Jaminion, S., Jutier, C., Todor, L., Di Salvo, R., ...

Exclusive electroproduction of pi0 mesons on protons in the backward hemisphere has been studied at Q2=1.0 GeV2 by detecting protons in the forward direction in coincidence with scattered electrons...

Backward electroproduction of $\pi^0$ mesons on protons in the region of nucleon resonances at four momentum transfer squared $Q^2 = 1.0 GeV^2$ (2006)

Laveissiere, G., Degrande, N., Jaminion, S., Jutier, C., Todor, L., Di Salvo, R., ...

Exclusive electroproduction of pi0 mesons on protons in the backward hemisphere has been studied at Q2=1.0 GeV2 by detecting protons in the forward direction in coincidence with scattered electrons...

Neutron Transversity at Jefferson Lab (2005)

Chen, J. P., Jiang, X., Zhu, L.

Nucleon transversity and single transverse spin asymmetries have been the recent focus of large efforts by both theorists and experimentalists. On-going and planned experiments from HERMES, COMPASS...

Virtual compton scattering in the resonance region up to the deep inelastic region at backward angles and momentum transfer squared of $Q^2$ = 1.0 $GeV^2$ (2005)

Laveissiere, G., Degrande, N., Jaminion, S., Jutier, C., Todor, L., Di Salvo, R., ...

We have made the first measurements of the virtual Compton scattering process via the e p -> e p gamma exclusive reaction at Q**2 = 1 GeV**2 in the nucleon resonance region. The cross section is...

Measurement of the generalized forward spin polarizabilities of the neutron (2005)

Amarian, M., Auerbach, L., Averett, T., Berthot, J., Bertin, P., Bertozzi, B., ...

Measurement of the generalized polarizabilities of the proton in virtual compton scattering at $Q^2$ = 0.92 and 1.76 Gev$^2$ (2005)

Laveissiere, G., Todor, L., Degrande, N., Jaminion, S., Jutier, C., Di Salvo, R., ...

We report a Virtual Compton Scattering study of the proton in Hall A at the Thomas Jefferson National Accelerator Facility at low CM energies. We have determined the structure functions...

Measurement of the generalized polarizabilities of the proton in virtual compton scattering at $Q^2=0.92 and 1.76 GeV^2$: I. Low energy expansion analysis (2005)

Jaminion, S., Degrande, N., Laveissiere, G., Jutier, C., Todor, L., Di Salvo, R., ...

Measurement of the generalized polarizabilities of the proton in virtual compton scattering at $Q^2=0.92 and 1.76 GeV^2$: II. Dispersion relation analysis (2005)

Laveissiere, G., Todor, L., Degrande, N., Jaminion, S., Jutier, C., Di Salvo, R., ...

Experimental determination of the effective strong coupling constant (2005)

Deur, A., Burkert, V., Chen, J. P., Korsch, W.

We present a first attempt to experimentally extract an effective strong coupling constant that we define to be a low Q2 extension of a previous definition by S. Brodsky et al. following an initial...

Quasielastic $^{3}He(e,e'p)^{2}H$ reaction at Q2=1.5 GeV2 for recoil momenta up to 1 GeV/c (2005)

Rvachev, M.M., Benmokhtar, F., Penel-Nottaris, E., Aniol, K.A., Bertozzi, W., Boeglin, W.U., ...

We have studied the quasielastic $^{3}He(e,e'p)^{2}H$ reaction in perpendicular coplanar kinematics, with the energy and the momentum transferred by the electron fixed at 840 MeV and 1502 MeV/c,...

Quasielastic $^{3}He(e,e'p)^{2}H$ reaction at Q2=1.5 GeV2 for recoil momenta up to 1 GeV/c (2005)

Rvachev, M.M., Benmokhtar, F., Penel-Nottaris, E., Aniol, K.A., Bertozzi, W., Boeglin, W.U., ...

We have studied the quasielastic $^{3}He(e,e'p)^{2}H$ reaction in perpendicular coplanar kinematics, with the energy and the momentum transferred by the electron fixed at 840 MeV and 1502 MeV/c,...

Quasielastic $^{3}He(e,e'p)^{2}H$ reaction at Q2=1.5 GeV2 for recoil momenta up to 1 GeV/c (2005)

Rvachev, M.M., Benmokhtar, F., Penel-Nottaris, E., Aniol, K.A., Bertozzi, W., Boeglin, W.U., ...

We have studied the quasielastic $^{3}He(e,e'p)^{2}H$ reaction in perpendicular coplanar kinematics, with the energy and the momentum transferred by the electron fixed at 840 MeV and 1502 MeV/c,...

Measurement of Rlt and Atl in the 4He(e,e'p)3H Reaction at pmiss of 130-300 MeV/c (2004)

Aniol, K. A., Epstein, M. B., Gama, E., Margaziotis, D. J., Bertozzi, W., Chen, J. P., ...

We have measured the 4He(e,e'p)3H reaction at missing momenta of 130-300 MeV/c using the three-spectrometer facility at the Mainz microtron MAMI. Data were taken in perpendicular kinematics to allow...

$Q^2$ evolution of the neutron spin structure moments using a $^3He$ target (2004)

Amarian, M., Auerbach, L., Averett, T., Berthot, J., Bertin, P., Bertozzi, B., ...

Parity-violating electroweak asymmetry in polarized-e p scattering (2004)

Aniol, K.A., Armstrong, D.S., Averett, T., Baylac, M., Burtin, E., Calarco, J., ...

Measurement of the generalized polarizabilities of the proton in virtual compton scattering at $Q^2$ = 0.92 and 1.76 Gev$^2$ (2004)

Laveissiere, G., Todor, L., Degrande, N., Jaminion, S., Jutier, C., Di Salvo, R., ...

We report a Virtual Compton Scattering study of the proton in Hall A at the Thomas Jefferson National Accelerator Facility at low CM energies. We have determined the structure functions...

Measurement of the generalized forward spin polarizabilities of the neutron (2004)

Amarian, M., Auerbach, L., Averett, T., Berthot, J., Bertin, P., Bertozzi, B., ...

Virtual compton scattering in the resonance region up to the deep inelastic region at backward angles and momentum transfer squared of $Q^2$ = 1.0 $GeV^2$ (2004)

Laveissiere, G., Degrande, N., Jaminion, S., Jutier, C., Todor, L., Di Salvo, R., ...

We have made the first measurements of the virtual Compton scattering process via the e p -> e p gamma exclusive reaction at Q**2 = 1 GeV**2 in the nucleon resonance region. The cross section is...

Measurement of the generalized polarizabilities of the proton in virtual compton scattering at $Q^2=0.92 and 1.76 GeV^2$: I. Low energy expansion analysis (2004)

Jaminion, S., Degrande, N., Laveissiere, G., Jutier, C., Todor, L., Di Salvo, R., ...

Measurement of the generalized polarizabilities of the proton in virtual compton scattering at $Q^2=0.92 and 1.76 GeV^2$: II. Dispersion relation analysis (2004)

Laveissiere, G., Todor, L., Degrande, N., Jaminion, S., Jutier, C., Di Salvo, R., ...

Backward electroproduction of $\pi^0$ mesons on protons in the region of nucleon resonances at four momentum transfer squared $Q^2 = 1.0 GeV^2$ (2004)

Laveissiere, G., Degrande, N., Jaminion, S., Jutier, C., Todor, L., Di Salvo, R., ...

$Q^2$ evolution of the neutron spin structure moments using a $^3He$ target (2004)

Amarian, M., Auerbach, L., Averett, T., Berthot, J., Bertin, P., Bertozzi, B., ...

Precision measurement of the neutron spin asymmetry ${A}_{1}^{n}$ and spin-flavor decomposition in the valence quark region (2004)

Zheng, X., Aniol, K., Armstrong, D.S., Averett, T.D., Bertozzi, W., Binet, S., ...

Parity-violating electroweak asymmetry in polarized-e p scattering (2004)

Aniol, K.A., Armstrong, D.S., Averett, T., Baylac, M., Burtin, E., Calarco, J., ...

Measurement of the generalized polarizabilities of the proton in virtual compton scattering at $Q^2$ = 0.92 and 1.76 Gev$^2$ (2004)

Laveissiere, G., Todor, L., Degrande, N., Jaminion, S., Jutier, C., Di Salvo, R., ...

We report a Virtual Compton Scattering study of the proton in Hall A at the Thomas Jefferson National Accelerator Facility at low CM energies. We have determined the structure functions...

Measurement of the generalized forward spin polarizabilities of the neutron (2004)

Amarian, M., Auerbach, L., Averett, T., Berthot, J., Bertin, P., Bertozzi, B., ...

Virtual compton scattering in the resonance region up to the deep inelastic region at backward angles and momentum transfer squared of $Q^2$ = 1.0 $GeV^2$ (2004)

Laveissiere, G., Degrande, N., Jaminion, S., Jutier, C., Todor, L., Di Salvo, R., ...

We have made the first measurements of the virtual Compton scattering process via the e p -> e p gamma exclusive reaction at Q**2 = 1 GeV**2 in the nucleon resonance region. The cross section is...

Measurement of the generalized polarizabilities of the proton in virtual compton scattering at $Q^2=0.92 and 1.76 GeV^2$: I. Low energy expansion analysis (2004)

Jaminion, S., Degrande, N., Laveissiere, G., Jutier, C., Todor, L., Di Salvo, R., ...

Measurement of the generalized polarizabilities of the proton in virtual compton scattering at $Q^2=0.92 and 1.76 GeV^2$: II. Dispersion relation analysis (2004)

Laveissiere, G., Todor, L., Degrande, N., Jaminion, S., Jutier, C., Di Salvo, R., ...

Backward electroproduction of $\pi^0$ mesons on protons in the region of nucleon resonances at four momentum transfer squared $Q^2 = 1.0 GeV^2$ (2004)

Laveissiere, G., Degrande, N., Jaminion, S., Jutier, C., Todor, L., Di Salvo, R., ...

$Q^2$ evolution of the neutron spin structure moments using a $^3He$ target (2004)

Amarian, M., Auerbach, L., Averett, T., Berthot, J., Bertin, P., Bertozzi, B., ...

Precision measurement of the neutron spin asymmetry ${A}_{1}^{n}$ and spin-flavor decomposition in the valence quark region (2004)

Zheng, X., Aniol, K., Armstrong, D.S., Averett, T.D., Bertozzi, W., Binet, S., ...

Plane-wave impulse approximation extraction of the neutron magnetic form-factor from quasielastic $^3\overrightarrow{He}(\vec{e},e')$ at $Q^2$ = 0.3 to 0.6 (GeV/c)$^2$ (2003)

Xu, W., Anderson, B., Auberbach, L., Averett, T., Bertozzi, W., Black, T., ...