Search

Your search keyword '"De Jager, C.W."' showing total 182 results
Start Over Author "De Jager, C.W."
182 results on '"De Jager, C.W."'

1. Methods for optical calibration of the BigBite hadron spectrometer

Author

Mihovilovič, M., Širca, S., Allada, K., Anderson, B.D., Annand, J.R.M., Averett, T., Camsonne, A., Chan, R.W., Chen, J.-P., Chirapatpimol, K., de Jager, C.W., Gilad, S., Hamilton, D.J., Hansen, J.-O., Higinbotham, D.W., Huang, J., Jiang, X., Jin, G., Korsch, W., LeRose, J.J., Lindgren, R.A., Liyanage, N., Long, E., Michaels, R., Moffit, B., Monaghan, P., Nelyubin, V., Norum, B.E., Piasetzky, E., Qian, X., Qiang, Y., Riordan, S., Ron, G., Rosner, G., Sawatzky, B., Shabestari, M., Shahinyan, A., Shneor, R., Subedi, R., Sulkosky, V., Watson, J.W., and Zhang, Y.-W.

Published
2012
Full Text
View/download PDF

2. An electromagnetic calorimeter for the JLab real compton scattering experiment

Author

Hamilton, D.J., Shahinyan, A., Wojtsekhowski, B., Annand, J.R.M., Chang, T.-H., Chudakov, E., Danagoulian, A., Degtyarenko, P., Egiyan, K., Gilman, R., Gorbenko, V., Hines, J., Hovhannisyan, E., Hyde-Wright, C.E., de Jager, C.W., Ketikyan, A., Mamyan, V.H., Michaels, R., Nathan, A.M., Nelyubin, V., Rachek, I., Roedelbrom, M., Petrosyan, A., Pomatsalyuk, R., Popov, V., Segal, J., Shestakov, Y., Templon, J., and Voskanyan, H.

Published
2011
Full Text
View/download PDF

3. Puzzle with the precession of the neutron spin

Author

Sulkosky, V., Peng, C., Chen, J.-P., Deur, A., Abrahamyan, S., Aniol, K.A., Armstrong, D.S., Averett, T., Bailey, S.L., Beck, A., Bertin, P., Butaru, F., Boeglin, W., Camsonne, A., Cates, G.D., Chang, C.C., Choi, Seonho, Chudakov, E., Coman, L., Cornejo, J.C., Craver, B., Cusanno, F., De Leo, R., De Jager, C.W., Denton, J.D., Dhamija, S., Feuerbach, R., Finn, J.M., Frullani, S., Fuoti, K., Gao, H., Garibaldi, F., Gayou, O., Gilman, R., Glamazdin, A., Glashausser, C., Gomez, J., Hansen, J.-O., Hayes, D., Hersman, B., Higinbotham, D.W., Holmstrom, T., Humensky, T.B., Hyde, C.E., Ibrahim, H., Iodice, M., Jiang, X., Kaufman, L.J., Kelleher, A., Keister, K.E., Kim, W., Kolarkar, A., Kolb, N., Korsch, W., Kramer, K., Kumbartzki, G., Lagamba, L., Laine, V., Laveissiere, G., LeRose, J.J., Lhuillier, D., Lindgren, R., Liyanage, N., Lu, H.-J., Ma, B., Margaziotis, D.J., Markowitz, P., McCormick, K., Meziane, M., Meziani, Z.-E., Michaels, R., Moffit, B., Monaghan, P., Nanda, S., Niedziela, J., Niskin, M., Pandolfi, R., Paschke, K.D., Potokar, M., Puckett, A., Punjabi, V.A., Qiang, Y., Ransome, R., Reitz, B., Roche, R., Saha, A., Shabetai, Alexandre, Sirca, S., Singh, J.T., Slifer, K., Snyder, R., Solvignon, P., Stringer, R., Subedi, R., Tobias, W.A., Ton, N., Ulmer, P.E., Urciuoli, G.M., Vacheret, A., Voutier, E., Wang, K., Wan, L., Wojtsekhowski, B., Woo, S., Yao, H., Yuan, J., Zhan, X., Zheng, X., Zhu, L., HEP, INSPIRE, Laboratoire de Physique de Clermont (LPC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), and E97-110

Subjects
spin: precession, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], nucleon: structure, strong interaction, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nonperturbative, spin: polarizability, momentum transfer: low, electromagnetic field, effective field theory: chiral, Nuclear Experiment, n: spin, experimental results, Jefferson Lab
Abstract

Understanding the structure of the nucleon (proton and neutron) is a critical problem in physics. Especially challenging is to understand the spin structure when the Strong Interaction becomes truly strong. At energy scales below the nucleon mass (~1 GeV), the intense interactions of the quarks and gluons inside the nucleon makes them highly correlated. Their coherent behavior causes the emergence of effective hadronic degrees of freedom (hadrons are composite particles made of quarks and gluons) which are necessary to understand the nucleon properties. Theoretically studying this subject requires approaches employing non-perturbative techniques or using hadronic degrees of freedom, e.g. chiral effective field theory (chiEFT). Here, we present measurements sensitive to the neutron's spin precession under electromagnetic fields. The observables, the generalized spin-polarizabilities delta_LT and gamma_0, which quantify the nucleon spin's precession, were measured at very low energy-momentum transfer squared Q^2 corresponding to probing distances of the size of the nucleon. Our Q^2 values match the domain where chiEFT calculations are expected to be applicable. The calculations have been conducted to high degrees of sophistication, including that of the so-called "gold-plated" observable, delta_LT. Surprisingly however, our data show a strong discrepancy with the chiEFT calculations. This presents a challenge to the current description of the neutron's spin properties.

Published
2021

4. Measurement of the He spin-structure functions and of neutron ( He) spin-dependent sum rules at 0.035 ≤ ≤ 0.24 GeV

Author

Sulkosky, V., Singh, J.T., Peng, C., Chen, J.P., Deur, A., Abrahamyan, S., Aniol, K.A., Armstrong, D.S., Averett, T., Bailey, S.L., Beck, A., Bertin, P., Butaru, F., Boeglin, W., Camsonne, A., Cates, G.D., Chang, C.C., Choi, Seonho, Chudakov, E., Coman, L., Cornejo, J.C., Craver, B., Cusanno, F., De Leo, R., de Jager, C.W., Denton, J.D., Dhamija, S., Feuerbach, R., Finn, J.M., Frullani, S., Fuoti, K., Gao, H., Garibaldi, F., Gayou, O., Gilman, R., Glamazdin, A., Glashausser, C., Gomez, J., Hansen, J.O., Hayes, D., Hersman, B., Higinbotham, D.W., Holmstrom, T., Humensky, T.B., Hyde, C.E., Ibrahim, H., Iodice, M., Jiang, X., Kaufman, L.J., Kelleher, A., Keister, K.E., Kim, W., Kolarkar, A., Kolb, N., Korsch, W., Kramer, K., Kumbartzki, G., Lagamba, L., Lainé, V., Laveissiere, G., Lerose, J.J., Lhuillier, D., Lindgren, R., Liyanage, N., Lu, H.J., Ma, B., Margaziotis, D.J., Markowitz, P., McCormick, K., Meziane, M., Meziani, Z.E., Michaels, R., Moffit, B., Monaghan, P., Nanda, S., Niedziela, J., Niskin, M., Pandolfi, R., Paschke, K.D., Potokar, M., Puckett, A.J.R., Punjabi, V.A., Qiang, Y., Ransome, R., Reitz, B., Roché, R., Saha, A., Shabetai, A., Širca, S., Slifer, K., Snyder, R., Solvignon, P., Stringer, R., Subedi, R., Tobias, W.A., Ton, N., Ulmer, P.E., Urciuoli, G.M., Vacheret, A., Voutier, E., Wang, K., Wan, L., Wojtsekhowski, B., Woo, S., Yao, H., Yuan, J., Zhan, X., Zheng, X., and Zhu, L.

Abstract

The spin-structure functions g1 and g2, and the spin-dependent partial cross-section σTT have been extracted from the polarized cross-sections differences, Δσ∥(ν,Q2) and Δσ⊥(ν,Q2) measured for the He3→(e→,e′)X reaction, in the E97-110 experiment at Jefferson Lab. Polarized electrons with energies from 1.147 to 4.404 GeV were scattered at angles of 6∘ and 9∘ from a longitudinally or transversely polarized $^{3}$He target. The data cover the kinematic regions of the quasi-elastic, resonance production and beyond. From the extracted spin-structure functions, the first moments Γ1‾(Q2), Γ2(Q2) and ITT(Q2) are evaluated with high precision for the neutron in the Q2 range from 0.035 to 0.24GeV2. The comparison of the data and the chiral effective field theory predictions reveals the importance of proper treatment of the Δ degree of freedom for spin observables.

Published
2020

5. Measurement of double-polarization asymmetries in the quasi-elastic He^→ 3 (e^→, e′ p) process

Author

Mihovilovič , M., Jin, G., Long, E., Zhang, Y.-W., Allada, K., Anderson, B., Annand, J.R.M., Averett, T., Bertozzi, W., Boeglin, W., Bradshaw, P., Camsonne, A., Canan, M., Cates, G.D., Chen, C., Chen, J.P., Chudakov, E., De Leo, R., Deng, X., Deltuva, A., Deur, A., Dutta, C., El Fassi, L., Flay, D., Frullani, S., Garibaldi, F., Gao, H., Gilad, S., Gilman, R., Glamazdin, O., Golak, J., Golge, S., Gomez, J., Hansen, O., Higinbotham, D.W., Holmstrom, T., Huang, J., Ibrahim, H., de Jager, C.W., Jensen, E., Jiang, X., Jones, M., Kamada, H., Kang, H., Katich, J., Khanal, H.P., Kievsky, A., King, P., Korsch, W., LeRose, J., Lindgren, R., Lu, H.-J., Luo, W., Marcucci, L.E., Markowitz, P., Meziane, M., Michaels, R., Moffit, B., Monaghan, P., Muangma, N., Nanda, S., Norum, B.E., Pan, K., Parno, D.S., Piasetzky, E., Posik, M., Punjabi, V., Puckett, A.J.R., Qian, X., Qiang, Y., Qui, X., Riordan, S., Saha, A., Sauer, P.U., Sawatzky, B., Schiavilla, R., Schoenrock, B., Shabestari, M., Shahinyan, A., Širca, S., Skibi ́nski, R., St. John, J., Subedi, R., Sulkosky, V., Tireman, W., Tobias, W.A., Topolnicki, K., Urciuoli, G.M., Viviani, M., Wang, D., Wang, K., Wang, Y., Watson, J., Wojtsekhowski, B., Witała, H., Ye, Z., Zhan, X., Zhang, Y., Zheng, X., Zhao, B., and Zhu, L.

Subjects
Double-polarization asymmetry, Helium-3 nucleus, Nuclear Theory, Proton knock-out, Nuclear Experiment
Abstract

We report on a precise measurement of double-polarization asymmetries in electron-induced breakup of 3Heproceeding to pdand ppnfinal states, performed in quasi-elastic kinematics at Q2=0.25 (GeV/c)2for missing momenta up to 250 MeV/c. These observables represent highly sensitive tools to investigate the electromagnetic and spin structure of 3Heand the relative importance of two-and three-body effects involved in the breakup reaction dynamics. The measured asymmetries cannot be satisfactorily reproduced by state-of-the-art calculations of 3Heunless their three-body segment is adjusted, indicating that the spin-dependent part of the nuclear interaction governing the three-body breakup process is much smaller than previously thought.

Published
2019

6. Measurement of the 3He spin-structure functions and of neutron (3He) spin-dependent sum rules at 0.035 ≤ Q2 ≤ 0.24 GeV2

Author

Sulkosky, V., primary, Singh, J.T., additional, Peng, C., additional, Chen, J.-P., additional, Deur, A., additional, Abrahamyan, S., additional, Aniol, K.A., additional, Armstrong, D.S., additional, Averett, T., additional, Bailey, S.L., additional, Beck, A., additional, Bertin, P., additional, Butaru, F., additional, Boeglin, W., additional, Camsonne, A., additional, Cates, G.D., additional, Chang, C.C., additional, Choi, Seonho, additional, Chudakov, E., additional, Coman, L., additional, Cornejo, J.C., additional, Craver, B., additional, Cusanno, F., additional, De Leo, R., additional, de Jager, C.W., additional, Denton, J.D., additional, Dhamija, S., additional, Feuerbach, R., additional, Finn, J.M., additional, Frullani, S., additional, Fuoti, K., additional, Gao, H., additional, Garibaldi, F., additional, Gayou, O., additional, Gilman, R., additional, Glamazdin, A., additional, Glashausser, C., additional, Gomez, J., additional, Hansen, J.-O., additional, Hayes, D., additional, Hersman, B., additional, Higinbotham, D.W., additional, Holmstrom, T., additional, Humensky, T.B., additional, Hyde, C.E., additional, Ibrahim, H., additional, Iodice, M., additional, Jiang, X., additional, Kaufman, L.J., additional, Kelleher, A., additional, Keister, K.E., additional, Kim, W., additional, Kolarkar, A., additional, Kolb, N., additional, Korsch, W., additional, Kramer, K., additional, Kumbartzki, G., additional, Lagamba, L., additional, Lainé, V., additional, Laveissiere, G., additional, Lerose, J.J., additional, Lhuillier, D., additional, Lindgren, R., additional, Liyanage, N., additional, Lu, H.-J., additional, Ma, B., additional, Margaziotis, D.J., additional, Markowitz, P., additional, McCormick, K., additional, Meziane, M., additional, Meziani, Z.-E., additional, Michaels, R., additional, Moffit, B., additional, Monaghan, P., additional, Nanda, S., additional, Niedziela, J., additional, Niskin, M., additional, Pandolfi, R., additional, Paschke, K.D., additional, Potokar, M., additional, Puckett, A.J.R., additional, Punjabi, V.A., additional, Qiang, Y., additional, Ransome, R., additional, Reitz, B., additional, Roché, R., additional, Saha, A., additional, Shabetai, A., additional, Širca, S., additional, Slifer, K., additional, Snyder, R., additional, Solvignon, P., additional, Stringer, R., additional, Subedi, R., additional, Tobias, W.A., additional, Ton, N., additional, Ulmer, P.E., additional, Urciuoli, G.M., additional, Vacheret, A., additional, Voutier, E., additional, Wang, K., additional, Wan, L., additional, Wojtsekhowski, B., additional, Woo, S., additional, Yao, H., additional, Yuan, J., additional, Zhan, X., additional, Zheng, X., additional, and Zhu, L., additional

Published
2020
Full Text
View/download PDF

8. Measurement of the single-spin asymmetry A y 0 in quasi-elastic 3He↑(e,e′n) scattering at 0.4 < Q 2 < 1.0 GeV/c 2

Author

Long, E., Zhang, Y.W., Mihovilovič, M., Jin, G., Sulkosky, V., Kelleher, A., Anderson, B., Higinbotham, D.W., Širca, S., Allada, K., Annand, J.R.M., Averett, T., Bertozzi, W., Boeglin, W., Bradshaw, P., Camsonne, A., Canan, M., Cates, G.D., Chen, C., Chen, J.-P., Chudakov, E., De Leo, R., Deng, X., Deur, A., Dutta, C., El Fassi, L., Flay, D., Frullani, S., Garibaldi, F., Gao, H., Gilad, S., Gilman, R., Glamazdin, O., Golge, S., Gomez, J., Hansen, J.-O., Holmstrom, T., Huang, J., Ibrahim, H., de Jager, C.W., Jensen, E., Jiang, X., Jones, M., Kang, H., Katich, J., Khanal, H.P., King, P.M., Korsch, W., LeRose, J., Lindgren, R., Lu, H.-J., Luo, W., Markowitz, P., Meziane, M., Michaels, R., Moffit, B., Monaghan, P., Muangma, N., Nanda, S., Norum, B.E., Pan, K., Parno, D., Piasetzky, E., Posik, M., Punjabi, V., Puckett, A.J.R., Qian, X., Qiang, Y., Qui, X., Riordan, S., Saha, A., Sawatzky, B., Shabestari, M., Shahinyan, A., Shoenrock, B., St. John, J., Subedi, R., Tobias, W.A., Tireman, W., Urciuoli, G.M., Wang, D., Wang, K., Wang, Y., Watson, J., Wojtsekhowski, B., Ye, Z., Zhan, X., Zhang, Y., Zheng, X., Zhao, B., and Zhu, L.

Abstract

No abstract available.

Published
2019

9. Measurement of the single-spin asymmetry In Quasi-elastic He ( , ′ ) Scattering at 0.4 < 1.0 GeV

Author

Long, E., Zhang, Y.W., Mihovilovič, M., Jin, G., Sulkosky, V., Kelleher, A., Anderson, B., Higinbotham, D.W., Širca, S., Allada, K., Annand, J.R.M., Averett, T., Bertozzi, W., Boeglin, W., Bradshaw, P., Camsonne, A., Canan, M., Cates, G.D., Chen, C., Chen, J.P., Chudakov, E., De Leo, R., Deng, X., Deur, A., Dutta, C., El Fassi, L., Flay, D., Frullani, S., Garibaldi, F., Gao, H., Gilad, S., Gilman, R., Glamazdin, O., Golge, S., Gomez, J., Hansen, J.O., Holmstrom, T., Huang, J., Ibrahim, H., de Jager, C.W., Jensen, E., Jiang, X., Jones, M., Kang, H., Katich, J., Khanal, H.P., King, P.M., Korsch, W., LeRose, J., Lindgren, R., Lu, H.J., Luo, W., Markowitz, P., Meziane, M., Michaels, R., Moffit, B., Monaghan, P., Muangma, N., Nanda, S., Norum, B.E., Pan, K., Parno, D., Piasetzky, E., Posik, M., Punjabi, V., Puckett, A.J.R., Qian, X., Qiang, Y., Qui, X., Riordan, S., Saha, A., Sawatzky, B., Shabestari, M., Shahinyan, A., Shoenrock, B., St. John, J., Subedi, R., Tobias, W.A., Tireman, W., Urciuoli, G.M., Wang, D., Wang, K., Wang, Y., Watson, J., Wojtsekhowski, B., Ye, Z., Zhan, X., Zhang, Y., Zheng, X., Zhao, B., and Zhu, L.

Abstract

Due to the lack of free neutron targets, studies of the structure of the neutron are typically made by scattering electrons from either $^{2}$H or $^{3}$He targets. In order to extract useful neutron information from a $^{3}$He target, one must understand how the neutron in a $^{3}$He system differs from a free neutron by taking into account nuclear effects such as final state interactions and meson exchange currents. The target single spin asymmetry Ay0 is an ideal probe of such effects, as any deviation from zero indicates effects beyond plane wave impulse approximation. New measurements of the target single spin asymmetry Ay0 at Q2 of 0.46 and 0.96 (GeV/c)2 were made at Jefferson Lab using the quasi-elastic He↑3(e,e′n) reaction. Our measured asymmetry decreases rapidly, from >20% at Q2=0.46 (GeV/c)2 to nearly zero at Q2=0.96 (GeV/c)2, demonstrating the fall-off of the reaction mechanism effects as Q2 increases. We also observed a small ϵ-dependent increase in Ay0 compared to previous measurements, particularly at moderate Q2. This indicates that upcoming high Q2 measurements from the Jefferson Lab 12 GeV program can cleanly probe neutron structure from polarized $^{3}$He using plane wave impulse approximation.

Published
2019

10. Measurement of double-polarization asymmetries in the quasi-elastic He^→ 3 (e^→, e′ p) process

Author

Faculty of Mathematics and Physics, University of Ljubljana, SI-1000 Ljubljana, Slovenia, Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia, Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany, University of Virginia, Charlottesville, VA 22908, USA, University of New Hampshire, Durham, NH 03824, USA, Rutgers University, New Brunswick, NJ 08901, USA, Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA, Kent State University, Kent, OH 44242, USA, Glasgow University, Glasgow G12 8QQ, Scotland, United Kingdom, The College of William and Mary, Williamsburg, VA 23187, USA, Massachusetts Institute of Technology, Cambridge, MA 02139, USA, Florida International University, Miami, FL 33181, USA, Old Dominion University, Norfolk, VA 23529, USA, Hampton University, Hampton, VA 23669, USA, Università degli studi di Bari Aldo Moro, I-70121 Bari, Italy, Institute for Theoretical Physics and Astronomy, Vilnius University, LT-01108 Vilnius, Lithuania, University of Kentucky, Lexington, KY 40506, USA, Temple University, Philadelphia, PA 19122, USA, Istituto Nazionale Di Fisica Nucleare, INFN/Sanita, Roma, Italy, Duke University, Durham, NC 27708, USA, Kharkov Institute of Physics and Technology, Kharkov 61108, Ukraine, M. Smoluchowski Institute of Physics, Jagiellonian University, PL-30348 Kraków, Poland, Longwood College, Farmville, VA 23909, USA, Cairo University, Cairo, Giza 12613, Egypt, Christopher Newport University, Newport News, VA 23606, USA, Los Alamos National Laboratory, Los Alamos, NM 87545, USA, Department of Physics, Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan, Seoul National University, Seoul, Republic of Korea, INFN-Pisa, I-56127 Pisa, Italy, Ohio University, Athens, OH 45701, USA, Huangshan University, People's Republic of China, Lanzhou University, Lanzhou, Gansu, 730000, People's Republic of China, Carnegie Mellon University, Pittsburgh, PA 15213, USA, Tel Aviv University, Tel Aviv 69978, Israel, Norfolk State University, Norfolk, VA 23504, USA, University of Connecticut, Storrs, CT 06269, USA, Institute for Theoretical Physics, University of Hannover, D-30167 Hannover, Germany, Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA, Old Dominion University, Norfolk, VA 23529, USA, Northern Michigan University, Marquette, MI 49855, USA, Yerevan Physics Institute, Yerevan, Armenia, Faculty of Mathematics and Physics, University of Ljubljana, SI-1000 Ljubljana, Slovenia, Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia, Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia, George Washington University, Washington, DC 20052, USA, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA, Mihovilovič , M., Jin, G., Long, E., Zhang, Y.-W., Allada, K., Anderson, B., Annand, J.R.M., Averett, T., Bertozzi, W., Boeglin, W., Bradshaw, P., Camsonne, A., Canan, M., Cates, G.D., Chen, C., Chen, J.P., Chudakov, E., De Leo, R., Deng, X., Deltuva, A., Deur, A., Dutta, C., El Fassi, L., Flay, D., Frullani, S., Garibaldi, F., Gao, H., Gilad, S., Gilman, R., Glamazdin, O., Golak, J., Golge, S., Gomez, J., Hansen, O., Higinbotham, D.W., Holmstrom, T., Huang, J., Ibrahim, H., de Jager, C.W., Jensen, E., Jiang, X., Jones, M., Kamada, H., Kang, H., Katich, J., Khanal, H.P., Kievsky, A., King, P., Korsch, W., LeRose, J., Lindgren, R., Lu, H.-J., Luo, W., Marcucci, L.E., Markowitz, P., Meziane, M., Michaels, R., Moffit, B., Monaghan, P., Muangma, N., Nanda, S., Norum, B.E., Pan, K., Parno, D.S., Piasetzky, E., Posik, M., Punjabi, V., Puckett, A.J.R., Qian, X., Qiang, Y., Qui, X., Riordan, S., Saha, A., Sauer, P.U., Sawatzky, B., Schiavilla, R., Schoenrock, B., Shabestari, M., Shahinyan, A., Širca, S., Skibi ́nski, R., St. John, J., Subedi, R., Sulkosky, V., Tireman, W., Tobias, W.A., Topolnicki, K., Urciuoli, G.M., Viviani, M., Wang, D., Wang, K., Wang, Y., Watson, J., Wojtsekhowski, B., Witała, H., Ye, Z., Zhan, X., Zhang, Y., Zheng, X., Zhao, B., Zhu, L., Faculty of Mathematics and Physics, University of Ljubljana, SI-1000 Ljubljana, Slovenia, Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia, Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, DE-55128 Mainz, Germany, University of Virginia, Charlottesville, VA 22908, USA, University of New Hampshire, Durham, NH 03824, USA, Rutgers University, New Brunswick, NJ 08901, USA, Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA, Kent State University, Kent, OH 44242, USA, Glasgow University, Glasgow G12 8QQ, Scotland, United Kingdom, The College of William and Mary, Williamsburg, VA 23187, USA, Massachusetts Institute of Technology, Cambridge, MA 02139, USA, Florida International University, Miami, FL 33181, USA, Old Dominion University, Norfolk, VA 23529, USA, Hampton University, Hampton, VA 23669, USA, Università degli studi di Bari Aldo Moro, I-70121 Bari, Italy, Institute for Theoretical Physics and Astronomy, Vilnius University, LT-01108 Vilnius, Lithuania, University of Kentucky, Lexington, KY 40506, USA, Temple University, Philadelphia, PA 19122, USA, Istituto Nazionale Di Fisica Nucleare, INFN/Sanita, Roma, Italy, Duke University, Durham, NC 27708, USA, Kharkov Institute of Physics and Technology, Kharkov 61108, Ukraine, M. Smoluchowski Institute of Physics, Jagiellonian University, PL-30348 Kraków, Poland, Longwood College, Farmville, VA 23909, USA, Cairo University, Cairo, Giza 12613, Egypt, Christopher Newport University, Newport News, VA 23606, USA, Los Alamos National Laboratory, Los Alamos, NM 87545, USA, Department of Physics, Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan, Seoul National University, Seoul, Republic of Korea, INFN-Pisa, I-56127 Pisa, Italy, Ohio University, Athens, OH 45701, USA, Huangshan University, People's Republic of China, Lanzhou University, Lanzhou, Gansu, 730000, People's Republic of China, Carnegie Mellon University, Pittsburgh, PA 15213, USA, Tel Aviv University, Tel Aviv 69978, Israel, Norfolk State University, Norfolk, VA 23504, USA, University of Connecticut, Storrs, CT 06269, USA, Institute for Theoretical Physics, University of Hannover, D-30167 Hannover, Germany, Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA, Old Dominion University, Norfolk, VA 23529, USA, Northern Michigan University, Marquette, MI 49855, USA, Yerevan Physics Institute, Yerevan, Armenia, Faculty of Mathematics and Physics, University of Ljubljana, SI-1000 Ljubljana, Slovenia, Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia, Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia, George Washington University, Washington, DC 20052, USA, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA, Mihovilovič , M., Jin, G., Long, E., Zhang, Y.-W., Allada, K., Anderson, B., Annand, J.R.M., Averett, T., Bertozzi, W., Boeglin, W., Bradshaw, P., Camsonne, A., Canan, M., Cates, G.D., Chen, C., Chen, J.P., Chudakov, E., De Leo, R., Deng, X., Deltuva, A., Deur, A., Dutta, C., El Fassi, L., Flay, D., Frullani, S., Garibaldi, F., Gao, H., Gilad, S., Gilman, R., Glamazdin, O., Golak, J., Golge, S., Gomez, J., Hansen, O., Higinbotham, D.W., Holmstrom, T., Huang, J., Ibrahim, H., de Jager, C.W., Jensen, E., Jiang, X., Jones, M., Kamada, H., Kang, H., Katich, J., Khanal, H.P., Kievsky, A., King, P., Korsch, W., LeRose, J., Lindgren, R., Lu, H.-J., Luo, W., Marcucci, L.E., Markowitz, P., Meziane, M., Michaels, R., Moffit, B., Monaghan, P., Muangma, N., Nanda, S., Norum, B.E., Pan, K., Parno, D.S., Piasetzky, E., Posik, M., Punjabi, V., Puckett, A.J.R., Qian, X., Qiang, Y., Qui, X., Riordan, S., Saha, A., Sauer, P.U., Sawatzky, B., Schiavilla, R., Schoenrock, B., Shabestari, M., Shahinyan, A., Širca, S., Skibi ́nski, R., St. John, J., Subedi, R., Sulkosky, V., Tireman, W., Tobias, W.A., Topolnicki, K., Urciuoli, G.M., Viviani, M., Wang, D., Wang, K., Wang, Y., Watson, J., Wojtsekhowski, B., Witała, H., Ye, Z., Zhan, X., Zhang, Y., Zheng, X., Zhao, B., and Zhu, L.

Abstract

type:Journal Article, We report on a precise measurement of double-polarization asymmetries in electron-induced breakup of 3Heproceeding to pdand ppnfinal states, performed in quasi-elastic kinematics at Q2=0.25 (GeV/c)2for missing momenta up to 250 MeV/c. These observables represent highly sensitive tools to investigate the electromagnetic and spin structure of 3Heand the relative importance of two-and three-body effects involved in the breakup reaction dynamics. The measured asymmetries cannot be satisfactorily reproduced by state-of-the-art calculations of 3Heunless their three-body segment is adjusted, indicating that the spin-dependent part of the nuclear interaction governing the three-body breakup process is much smaller than previously thought., source:https://doi.org/10.1016/j.physletb.2018.10.063

Published
2020

11. Basic instrumentation for Hall A at Jefferson Lab

Author

Alcorn, J., Anderson, B.D., Aniol, K.A., Annand, J.R.M., Auerbach, L., Arrington, J., Averett, T., Baker, F.T., Baylac, M., Beise, E.J., Berthot, J., Bertin, P.Y., Bertozzi, W., Bimbot, L., Black, T., Boeglin, W.U., Boykin, D.V., Brash, E.J., Breton, V., Breuer, H., Brindza, P., Brown, D., Burtin, E., Calarco, J.R., Cardman, L.S., Carr, R., Cates, G.D., Cavata, C., Chai, Z., Chang, C.C., Chant, N.S., Chen, J.-P., Choi, S., Chudakov, E., Churchwell, S., Coman, M., Cisbani, E., Colilli, S., Colombel, N., Crateri, R., Dale, D.S., Degrande, N., de Jager, C.W., De Leo, R., Deur, A., Dezern, G., Diederich, B., Dieterich, S., di Salvo, R., Djawotho, P., Domingo, J., Ducret, J.-E., Dutta, D., Egiyan, K., Epstein, M.B., Escoffier, S., Esp, S., Ewell, L.A., Finn, J.M., Fissum, K.G., Folts, E., Fonvieille, H., Frois, B., Frullani, S., Gao, H., Gao, J., Garibaldi, F., Gasparian, A., Gavalya, A., Gayou, O., Gilad, S., Gilman, R., Giuliani, F., Glamazdin, A., Glashausser, C., Gomez, J., Gorbenko, V., Gorringe, T., Gricia, M., Griffioen, K., Hamilton, D., Hansen, J.-O., Hersman, F.W., Higinbotham, D.W., Holmes, R., Holmgren, H., Holtrop, M., d'Hose, N., Hovhannisyan, E., Howell, C., Huber, G.M., Hughes, E., Hyde-Wright, C.E., Ibrahim, H., Incerti, S., Iodice, M., Iommi, R., Ireland, D., Jaminion, S., Jardillier, J., Jensen, S., Jiang, X., Jones, C.E., Jones, M.K., Joo, K., Jutier, C., Kahl, W., Kato, S., Katramatou, A.T., Kelly, J.J., Kerhoas, S., Ketikyan, A., Khandaker, M., Khayat, M., Kino, K., Kominis, I., Korsch, W., Kox, S., Kramer, K., Kumar, K.S., Kumbartzki, G., Kuss, M., Lagamba, L., Laveissière, G., Leone, A., LeRose, J.J., Marie, F., Levchuk, L., Leuschner, M., Lhuillier, D., Liang, M., Livingston, K., Lindgren, R.A., Liyanage, N., Lolos, G.J., Lourie, R.W., Lucentini, M., Madey, R., Maeda, K., Malov, S., Manley, D.M., Margaziotis, D.J., Markowitz, P., Marroncle, J., Martine, J., Mayilyan, S., McCarthy, J.S., McCormick, K., Mclntyre, J., McKeown, R.D., Meekins, D., van der Meer, R.L.J., Meziani, Z.-E., Michaels, R., Milbrath, B., Miller, J.A., Miller, W., Mitchell, J., Mougey, J., Nanda, S., Nathan, A., Neyret, D., Offermann, E.A.J.M., Papandreou, Z., Perdrisat, C.F., Perrino, R., Petratos, G.G., Petrosyan, A., Pierangeli, L., Platchkov, S., Pomatsalyuk, R., Pripstein, D., Prout, D.L., Punjabi, V.A., Pussieux, T., Quéméner, G., Ransomez, R.D., Ravel, O., Reitz, B., Roblin, Y., Roche, R., Roedelbronn, M., Rondon-Aramayo, O.A., Roos, P.G., Rosner, G., Rowntree, D., Rutledge, G.A., Rutt, P.M., Rvachev, M., Sabatavenere, F., Saha, A., Saito, T., Santavenere, F., Sarty, A.J., Schneider, W.J., Segal, J.P., Serdarevic-Offermann, A., Shahinyan, A., Slifer, K., Smith, T.P., Soldi, A., Sorokin, P., Souder, P., Spiegel, S.L., Stevens, M.A., Strauch, S., Suleiman, R., Templon, J.A., Terasawa, T., Todor, L., Tsubota, H., Ueno, H., Ulmer, P.E., Urciuoli, G.M., Van Hoorebeke, L., Van de Vyver, R., van Verst, S., Vernin, P., Vlahovic, B., Voskanyan, H., Voutier, E., Walter, R., Watson, J.W., Watts, D.P., Weinstein, L.B., Wijesooriya, K., Wojtsekhowski, B., Xiang, H., Xiong, F., Xu, W., Zainea, D.G., Zeps, V., Zhao, J., Zheng, X., Zhou, Z.-L., Zhu, L., and Zolnierczuk, P.A.

Published
2004
Full Text
View/download PDF

12. Measurement of the single-spin asymmetry Ay0 in quasi-elastic 3He↑(e,e′n) scattering at 0.4 < Q2 < 1.0 GeV/c2

Author

Long, E., primary, Zhang, Y.W., additional, Mihovilovič, M., additional, Jin, G., additional, Sulkosky, V., additional, Kelleher, A., additional, Anderson, B., additional, Higinbotham, D.W., additional, Širca, S., additional, Allada, K., additional, Annand, J.R.M., additional, Averett, T., additional, Bertozzi, W., additional, Boeglin, W., additional, Bradshaw, P., additional, Camsonne, A., additional, Canan, M., additional, Cates, G.D., additional, Chen, C., additional, Chen, J.-P., additional, Chudakov, E., additional, De Leo, R., additional, Deng, X., additional, Deur, A., additional, Dutta, C., additional, El Fassi, L., additional, Flay, D., additional, Frullani, S., additional, Garibaldi, F., additional, Gao, H., additional, Gilad, S., additional, Gilman, R., additional, Glamazdin, O., additional, Golge, S., additional, Gomez, J., additional, Hansen, J.-O., additional, Holmstrom, T., additional, Huang, J., additional, Ibrahim, H., additional, de Jager, C.W., additional, Jensen, E., additional, Jiang, X., additional, Jones, M., additional, Kang, H., additional, Katich, J., additional, Khanal, H.P., additional, King, P.M., additional, Korsch, W., additional, LeRose, J., additional, Lindgren, R., additional, Lu, H.-J., additional, Luo, W., additional, Markowitz, P., additional, Meziane, M., additional, Michaels, R., additional, Moffit, B., additional, Monaghan, P., additional, Muangma, N., additional, Nanda, S., additional, Norum, B.E., additional, Pan, K., additional, Parno, D., additional, Piasetzky, E., additional, Posik, M., additional, Punjabi, V., additional, Puckett, A.J.R., additional, Qian, X., additional, Qiang, Y., additional, Qui, X., additional, Riordan, S., additional, Saha, A., additional, Sawatzky, B., additional, Shabestari, M., additional, Shahinyan, A., additional, Shoenrock, B., additional, St. John, J., additional, Subedi, R., additional, Tobias, W.A., additional, Tireman, W., additional, Urciuoli, G.M., additional, Wang, D., additional, Wang, K., additional, Wang, Y., additional, Watson, J., additional, Wojtsekhowski, B., additional, Ye, Z., additional, Zhan, X., additional, Zhang, Y., additional, Zheng, X., additional, Zhao, B., additional, and Zhu, L., additional

Published
2019
Full Text
View/download PDF

13. Precision measurements of A1n in the deep inelastic regime

Author

Parno, D.S., Flay, D., Posik, M., Allada, K., Armstrong, W., Averett, T., Benmokhtar, F., Bertozzi, W., Camsonne, A., Canan, M., Cates, G.D., Chen, C., Chen, J.-P., Choi, S., Chudakov, E., Cusanno, F., Dalton, M.M., Deconinck, W., de Jager, C.W., Deng, X., Deur, A., Dutta, C., El Fassi, L., Franklin, G.B., Friend, M., Gao, H., Garibaldi, F., Gilad, S., Gilman, R., Glamazdin, O., Golge, S., Gomez, J., Guo, L., Hansen, O., Higinbotham, D.W., Holmstrom, T., Huang, J., Hyde, C., Ibrahim, H.F., Jiang, X., Jin, G., Katich, J., Kelleher, A., Kolarkar, A., Korsch, W., Kumbartzki, G., LeRose, J.J., Lindgren, R., Liyanage, N., Long, E., Lukhanin, A., Mamyan, V., McNulty, D., Meziani, Z.-E., Michaels, R., Mihovilovič, M., Moffit, B., Muangma, N., Nanda, S., Narayan, A., Nelyubin, V., Norum, B., Nuruzzaman, Oh, Y., Peng, J.C., Qian, X., Qiang, Y., Rakhman, A., Riordan, S., Saha, A., Sawatzky, B., Shabestari, M.H., Shahinyan, A., Širca, S., Solvignon, P., Subedi, R., Sulkosky, V., Tobias, W.A., Troth, W., Wang, D., Wang, Y., Wojtsekhowski, B., Yan, X., Yao, H., Ye, Y., Ye, Z., Yuan, L., Zhan, X., Zhang, Y., Zhang, Y.-W., Zhao, B., and Zheng, X.

Subjects
Nuclear and High Energy Physics
Published
2015
Full Text
View/download PDF

14. Measurement of double-polarization asymmetries in the quasi-elastic He→3(e→,e′p) process

Author

Mihovilovič, M., primary, Jin, G., additional, Long, E., additional, Zhang, Y.-W., additional, Allada, K., additional, Anderson, B., additional, Annand, J.R.M., additional, Averett, T., additional, Bertozzi, W., additional, Boeglin, W., additional, Bradshaw, P., additional, Camsonne, A., additional, Canan, M., additional, Cates, G.D., additional, Chen, C., additional, Chen, J.P., additional, Chudakov, E., additional, De Leo, R., additional, Deng, X., additional, Deltuva, A., additional, Deur, A., additional, Dutta, C., additional, El Fassi, L., additional, Flay, D., additional, Frullani, S., additional, Garibaldi, F., additional, Gao, H., additional, Gilad, S., additional, Gilman, R., additional, Glamazdin, O., additional, Golak, J., additional, Golge, S., additional, Gomez, J., additional, Hansen, O., additional, Higinbotham, D.W., additional, Holmstrom, T., additional, Huang, J., additional, Ibrahim, H., additional, de Jager, C.W., additional, Jensen, E., additional, Jiang, X., additional, Jones, M., additional, Kamada, H., additional, Kang, H., additional, Katich, J., additional, Khanal, H.P., additional, Kievsky, A., additional, King, P., additional, Korsch, W., additional, LeRose, J., additional, Lindgren, R., additional, Lu, H.-J., additional, Luo, W., additional, Marcucci, L.E., additional, Markowitz, P., additional, Meziane, M., additional, Michaels, R., additional, Moffit, B., additional, Monaghan, P., additional, Muangma, N., additional, Nanda, S., additional, Norum, B.E., additional, Pan, K., additional, Parno, D.S., additional, Piasetzky, E., additional, Posik, M., additional, Punjabi, V., additional, Puckett, A.J.R., additional, Qian, X., additional, Qiang, Y., additional, Qui, X., additional, Riordan, S., additional, Saha, A., additional, Sauer, P.U., additional, Sawatzky, B., additional, Schiavilla, R., additional, Schoenrock, B., additional, Shabestari, M., additional, Shahinyan, A., additional, Širca, S., additional, Skibiński, R., additional, St. John, J., additional, Subedi, R., additional, Sulkosky, V., additional, Tireman, W., additional, Tobias, W.A., additional, Topolnicki, K., additional, Urciuoli, G.M., additional, Viviani, M., additional, Wang, D., additional, Wang, K., additional, Wang, Y., additional, Watson, J., additional, Wojtsekhowski, B., additional, Witała, H., additional, Ye, Z., additional, Zhan, X., additional, Zhang, Y., additional, Zheng, X., additional, Zhao, B., additional, and Zhu, L., additional

Published
2019
Full Text
View/download PDF

15. Rosenbluth separation of the $\pi^0$ Electroproduction Cross Section off the Neutron

Author

Mazouz, M., Ahmed, Z., Albataineh, H., Allada, K., Aniol, K.A., Bellini, V., Benali, M., Boeglin, W., Bertin, P., Brossard, M., Camsonne, A., Canan, M., Chandavar, S., Chen, C., Chen, J.P., Defurne, M., de Jager, C.W., de Leo, R., Desnault, C., Deur, A., El Fassi, L., Ent, R., Flay, D., Friend, M., Fuchey, E., Frullani, S., Garibaldi, F., Gaskell, D., Giusa, A., Glamazdin, O., Golge, S., Gomez, J., Hansen, O., Higinbotham, D., Holmstrom, T., Horn, T., Huang, J., Huang, M., Huber, G.M., Hyde, C.E., Iqbal, S., Itard, F., Kang, Ho., Kang, Hy., Kelleher, A., Keppel, C., Koirala, S., Korover, I., Lerose, J.J., Lindgren, R., Long, E., Magne, M., Mammei, J., Margaziotis, D.J., Markowitz, P., Martí Jiménez-Argüello, A., Meddi, F., Meekins, D., Michaels, R., Mihovilovic, M., Muangma, N., Muñoz Camacho, C., Nadel-Turonski, P., Nuruzzaman, N., Paremuzyan, R., Puckett, A., Punjabi, V., Qiang, Y., Rakhman, A., Rashad, M.N.H., Riordan, S., Roche, J., Russo, G., Sabatié, F., Saenboonruang, K., Saha, A., Sawatzky, B., Selvy, L., Shahinyan, A., Sirca, S., Solvignon, P., Sperduto, M.L., Subedi, R., Sulkosky, V., Sutera, C., Tobias, W.A., Urciuoli, G.M., Wang, D., Wojtsekhowski, B., Yao, H., Ye, Z., Zana, L., Zhan, X., Zhang, J., Zhao, B., Zhao, Z., Zheng, X., Zhu, P., Laboratoire de Physique de Clermont (LPC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Jefferson Lab Hall A, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Clermont Auvergne (UCA)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique de Clermont ( LPC ), Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Université Clermont Auvergne ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ), Département de Physique Nucléaire (ex SPhN) ( DPHN ), Institut de Recherches sur les lois Fondamentales de l'Univers ( IRFU ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay ( IPNO ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), and Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
longitudinal, Nuclear Theory, n: structure function, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], momentum transfer dependence, electron n: scattering, High Energy Physics - Experiment, generalized parton distribution: transversity, [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], hard exclusive electroproduction, recoil, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], polarization: transverse, [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, mesons, flavor, generalized parton distributions, scattering, deuteron: structure function, +electron+deuteron+pi0%22">electron deuteron --> electron deuteron pi0, electron deuteron: deep inelastic scattering, nucleon: generalized parton distribution, photon: polarization, coherence, pi0: electroproduction, High Energy Physics::Experiment, experimental results
Abstract

We report the first longitudinal/transverse separation of the deeply virtual exclusive $\pi^0$ electroproduction cross section off the neutron and coherent deuteron. The corresponding four structure functions $d\sigma_L/dt$, $d\sigma_T/dt$, $d\sigma_{LT}/dt$ and $d\sigma_{TT}/dt$ are extracted as a function of the momentum transfer to the recoil system at $Q^2$=1.75 GeV$^2$ and $x_B$=0.36. The $ed \to ed\pi^0$ cross sections are found compatible with the small values expected from theoretical models. The $en \to en\pi^0$ cross sections show a dominance from the response to transversely polarized photons, and are in good agreement with calculations based on the transversity GPDs of the nucleon. By combining these results with previous measurements of $\pi^0$ electroproduction off the proton, we present a flavor decomposition of the $u$ and $d$ quark contributions to the cross section., Comment: 6 pages, 6 figures, Submitted to Phys. Rev. Lett

Published
2017
Full Text
View/download PDF

16. First measurement of unpolarized semi-inclusive deep-inelastic scattering cross sections from a $^3$He target

Author

Allada, K., Aniol, K., Annand, J.R.M., Averett, T., Benmokhtar, F., Bertozzi, W., Bradshaw, P.C., Bosted, P., Camsonne, A., Canan, M., Cates, G.D., Chen, C., Chen, J.-P., Chen, W., Chirapatpimol, K., Chudakov, E., Cisbani, E., Cornejo, J.C., Cusanno, F., Dalton, M.M., Deconinck, W., de Jager, C.W., de Leo, R., Deng, X., Deur, A., Ding, H., Dolph, P.A.M., Dutta, C., Dutta, D., El Fassi, L., Frullani, S., Gao, H., Garibaldi, F., Gaskell, D., Gilad, S., Gilman, R., Glamazdin, O., Golge, S., Guo, L., Hamilton, D., Hansen, O., Higinbotham, D.W., Holmstrom, T., Huang, J., Huang, M., Ibrahim, H.F., Iodice, M., Jiang, X., Jin, G., Jones, M.K., Katich, J., Kelleher, A., Kim, W., Kolarkar, A., Korsch, W., Lerose, J.J., Li, X., Li, Y., Lindgren, R., Liu, T., Liyanage, N., Long, E., Lu, H.-J., Margaziotis, D.J., Markowitz, P., Marrone, S., Mcnulty, D., Meziani, Z.-E., Michaels, R., Moffit, B., Muñoz Camacho, C., Nanda, S., Narayan, A., Nelyubin, V., Norum, B., Oh, Y., Osipenko, M., Parno, D., Peng, J.-C., Phillips, S.K., Posik, M., Puckett, A.J.R., Qian, X., Qiang, Y., Rakhman, A., Ransome, R., Riordan, S., Saha, A., Sawatzky, B., Schulte, E., Shahinyan, A., Shabestari, M.H., Širca, S., Stepanyan, S., Subedi, R., Sulkosky, V., Tang, L.-G., Tobias, W.A., Urciuoli, G.M., Vilardi, I., Wang, K., Wojtsekhowski, B., Wang, Y., Yan, X., Yao, H., Ye, Y., Ye, Z., Yuan, L., Zhan, X., Zhang, Y.-W., Zhao, B., Zhao, Y.X., Zheng, X., Zhu, L., Zhu, X., Zong, X., Laboratoire de Physique de Clermont ( LPC ), Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Université Clermont Auvergne ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ), Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ), Jefferson Lab Hall A, Laboratoire de Physique de Clermont (LPC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Clermont Auvergne (UCA)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS)

Subjects
+electron+pi%2B%22">electron helium --> electron pi+, HRS, helium: target, cross section: ratio, plane wave, HERMES, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], cross section: angular dependence, COMPASS, Sivers function, quantum chromodynamics, electron: beam, [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], +electron+pi%22">electron helium --> electron pi, deep inelastic scattering: semi-inclusive reaction, nucleus, parametrization, showers, model: quark parton, pi+: production, kinematics, differential cross section, quark: valence, higher-dimensional, numerical calculations: Monte Carlo, experimental results, Jefferson Lab
Abstract

International audience; The unpolarized semi-inclusive deep-inelastic scattering (SIDIS) differential cross sections in He3(e,e′π±)X have been measured for the first time in Jefferson Lab experiment E06-010 with a 5.9GeVe− beam on a He3 gas target. The experiment focuses on the valence quark region, covering a kinematic range 0.12

Published
2017
Full Text
View/download PDF

17. Constraints on the nucleon strange form factors at Q2∼0.1 GeV2

Author

Aniol, K.A., Armstrong, D.S., Averett, T., Benaoum, H., Bertin, P.Y., Burtin, E., Cahoon, J., Cates, G.D., Chang, C.C., Chao, Y.-C., Chen, J.P., Choi, Seonho, Chudakov, E., Craver, B., Cusanno, F., Decowski, P., Deepa, D., Ferdi, C., Feuerbach, R.J., Finn, J.M., Frullani, S., Fuoti, K., Garibaldi, F., Gilman, R., Glamazdin, A., Gorbenko, V., Grames, J.M., Hansknecht, J., Higinbotham, D.W., Holmes, R., Holmstrom, T., Humensky, T.B., Ibrahim, H., de Jager, C.W., Jiang, X., Kaufman, L.J., Kelleher, A., Kolarkar, A., Kowalski, S., Kumar, K.S., Lambert, D., LaViolette, P., LeRose, J., Lhuillier, D., Liyanage, N., Margaziotis, D.J., Mazouz, M., McCormick, K., Meekins, D.G., Meziani, Z.-E., Michaels, R., Moffit, B., Monaghan, P., Munoz-Camacho, C., Nanda, S., Nelyubin, V., Neyret, D., Paschke, K.D., Poelker, M., Pomatsalyuk, R., Qiang, Y., Reitz, B., Roche, J., Saha, A., Singh, J., Snyder, R., Souder, P.A., Stutzman, M., Subedi, R., Suleiman, R., Sulkosky, V., Tobias, W.A., Urciuoli, G.M., Vacheret, A., Voutier, E., Wang, K., Wilson, R., Wojtsekhowski, B., and Zheng, X.

Subjects
Nuclear and High Energy Physics
Published
2006
Full Text
View/download PDF

18. Precision Measurement of the p(e,e′p)π0 Reaction at Threshold

Author

Chirapatpimol, K., Shabestari, M.H., Lindgren, R.A., Smith, L.C., Annand, J.R.M., Higinbotham, D.W., Moffit, B., Nelyubin, V., Norum, B.E., Allada, K., Aniol, K., Ardashev, K., Armstrong, D.S., Arndt, R.A., Benmokhtar, F., Bernstein, A.M., Bertozzi, W., Briscoe, W.J., Bimbot, L., Camsonne, A., Chen, J.-P., Choi, S., Chudakov, E., Cisbani, E., Cusanno, F., Dalton, M.M., Dutta, C., Egiyan, K., Fernàndez-Ramìrez, C., Feuerbach, R., Fissum, K.G., Frullani, S., Garibaldi, F., Gayou, O., Gilman, R., Gilad, S., Goity, J., Gomez, J., Hahn, B., Hamilton, D., Hansen, J.-O., Huang, J., Igarashi, R., Ireland, D., De Jager, C.W., Jin, X., Jiang, X., Jinasundera, T., Kellie, J., Keppel, C.E., Kolb, N., LeRose, J., Liyanage, N., Livingston, K., McNulty, D., Mercado, L., Michaels, R., Mihovilovič, M., Qian, S., Qian, X., Mailyan, S., Mamyan, V., Marrone, S., Monaghan, P., Nanda, S., Perdrisat, C.F., Piasetzky, E., Protopopescu, D., Punjabi, V., Qiang, Y., Rachek, I.A., Rakhman, A., Riordan, S., Ron, G., Rosner, G., Saha, A., Sawatzky, B., Shahinyan, A., Širca, S., Sparveris, N., Subedi, R.R., Suleiman, R., Strakovsky, I., Sulkosky, V., Moinelo, J., Voskanyan, H., Wang, K., Wang, Y., Watson, J., Watts, D., Wojtsekhowski, B., Workman, R.L., Yao, H., Zhan, X., Zhang, Y., Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Hall A Collaboration

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

International audience; New results are reported from a measurement of π0 electroproduction near threshold using the p(e,e′p)π0 reaction. The experiment was designed to determine precisely the energy dependence of s- and p-wave electromagnetic multipoles as a stringent test of the predictions of chiral perturbation theory (ChPT). The data were taken with an electron beam energy of 1192 MeV using a two-spectrometer setup in Hall A at Jefferson Lab. For the first time, complete coverage of the ϕ∗π and θ∗π angles in the pπ0 center of mass was obtained for invariant energies above threshold from 0.5 up to 15 MeV. The 4-momentum transfer Q2 coverage ranges from 0.05 to 0.155 (GeV/c)2 in fine steps. A simple phenomenological analysis of our data shows strong disagreement with p-wave predictions from ChPT for Q2>0.07 (GeV/c)2, while the s-wave predictions are in reasonable agreement.

Published
2015
Full Text
View/download PDF

19. Status of the T20 experiment at VEPP-3

Author

Popov, S.G., Mishnev, S.I., Nikolenko, D.M., Petrov, D.V., Rachek, I.A., Sukhanov, A.V., Toporkov, D.K., Tsentalovich, E.K., Volosov, A., Wojtsekhowski, B.B., Jones, C.E., Kowalczyk, R.S., Poelker, M., Potterveld, D.H., Young, L., Holt, R.J., Gilman, R., Kinney, E.R., Coulter, K.P., Theunissen, J.A.P., de Jager, C.W., de Vries, H., Nelyubin, V.V., Vikhrov, V.V., Osipov, A.N., Stibunov, V.N., Stephenson, E.J., Vigdor, S.E., and Other Research IHEF (IoP, FNWI)

Subjects
Elastic scattering, Physics, Nuclear physics, Particle physics, Deuterium, Angular correlation, Cathode ray, Physics::Accelerator Physics, High Energy Physics::Experiment, Tensor, Electron, Nuclear Experiment, Beam energy
Abstract

Using a gaseous polarized deuterium and the 2 GeV electron beam at 2 GeV beam energy the tensor analyzing power, T20, for the NN potential will be measured with the elastic d↘(e,e) reaction at VEPP‐3, Novosibirsk. A description and progress report of the experiment is given. (AIP)

Published
1995

20. Exclusive neutral pion electroproduction in the deeply virtual regime

Author

Fuchey, E., Camsonne, A., Munoz Camacho, C., Mazouz, M., Gavalian, G., Kuchina, E., Amarian, M., A. Aniol, K., Beaumel, M., Benaoum, H., Bertin, P.Y., Brossard, M., Canan, M., Chen, J.-P., Chudakov, E., Craver, B., Cusanno, F., De Jager, C.W., Deur, A., Ferdi, C., Feuerbach, R., Fieschi, J.-M., Frullani, S., Garcon, M., Garibaldi, F., Gayou, O., Gilman, R., Gomez, J., Gueye, P., Guichon, P.A.M., Guillon, B., Hansen, O., Hayes, D., Higinbotham, D.W., Holmstrom, T., Hyde, C. E., Ibrahim, H., Igarashi, R., Itard, F., Jiang, X., Jo, H.S., Kaufman, L.J., Kelleher, A., Kolarkar, A., Kumbartzki, G., Laveissiere, G., LeRose, J.J., Lindgren, R., Liyanage, N., Lu, H.-J., Margaziotis, D.J., Meziani, Z.-E., McCormick, K., Michaels, R., Michel, B., Moffit, B., Monaghan, P., Nanda, S., Nelyubin, V., Potokar, M., Qiang, Y., Ransome, R.D., Réal, J.S., Reitz, B., Roblin, Y., Roche, J., Sabatie, F., Saha, A., Sirca, S., Slifer, K., Solvignon, P., Subedi, R., Sulkosky, V., Ulmer, P.E., Voutier, E., Wang, K., Weinstein, L.B., Wojtsekhowski, B., Zheng, X., Zhu, L., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), DVCS, HALL A, Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Momentum transfer, FOS: Physical sciences, Elementary particle, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Inelastic scattering, Deep inelastic scattering, 01 natural sciences, Nuclear physics, Pion, 0103 physical sciences, High Energy Physics::Experiment, Tensor, Nuclear Experiment (nucl-ex), Nuclear Experiment, 010306 general physics, Boson
Abstract

We present measurements of the ep->ep pi^0 cross section extracted at two values of four-momentum transfer Q^2=1.9 GeV^2 and Q^2=2.3 GeV^2 at Jefferson Lab Hall A. The kinematic range allows to study the evolution of the extracted hadronic tensor as a function of Q^2 and W. Results will be confronted with Regge inspired calculations and GPD predictions. An intepretation of our data within the framework of semi-inclusive deep inelastic scattering has also been attempted.

Published
2011
Full Text
View/download PDF

21. High resolution spectroscopy of $^{12}_\Lambda$ B by electroproduction

Author

Iodice, M., Cusanno, F., Acha, A., Ambrozewicz, P., Aniol, K.A., Baturin, P., Bertin, P.Y., Benaoum, H., Blomqvist, K.I., Boeglin, W.U., Breuer, H., Brindza, P., Bydzovsky, P., Camsonne, A., Chang, C.C., Chen, J.-P., Choi, Seonho, Chudakov, E.A., Cisbani, E., Colilli, S., Coman, L., Craver, B.J., de Cataldo, G., de Jager, C.W., Deleo, R., Deur, A.P., Ferdi, C., Feuerbach, R.J., Folts, E., Fratoni, R., Frullani, S., Garibaldi, F., Gayou, O., Giulani, F., Gomez, J., Gricia, M., Hansen, J.O., Hayes, D., Higinbotham, D.W., Holmstrom, T.K., Hyde, C. E., Ibrahim, H.F., Jiang, X., Kaufman, L.J., Kino, K., Kross, B., Lagamba, L., Lerose, J.J., Lindgren, R.A., Lucentini, M., Margaziotis, D.J., Markowitz, P., Marrone, S., Meziani, Z.E., Mccormick, K., Michaels, R.W., Millener, D.J., Miyoshi, T., Moffit, B., Monaghan, P.A., Moteabbed, M., Munoz Camacho, C., Nanda, S., Nappi, E., Nelyubin, V.V., Norum, B.E., Okasyasu, Y., Paschke, K.D., Perdrisat, C.F., Piasetzky, E., Punjabi, V.A., Qiang, Y., Raue, B., Reimer, P.E., Reinhold, J., Reitz, B., Roche, R.E., Rodriguez, V.M., Saha, A., Santavenere, F., Sarty, A.J., Segal, J., Shahinyan, A., Singh, J., Sirca, S., Snyder, R., Solvignon, P.H., Sotona, M., Subedi, R., Sulkosky, V.A., Suzuki, T., Ueno, H., Ulmer, P.E., Urciuoli, G.M., Veneroni, P., Voutier, E., Wojtsekhowski, B.B., Zheng, X., Zorn, C., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), HALL A, and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)

Subjects
21.80.+a, 25.30.Rw, 21.60.Cs, 24.50.+g, FOS: Physical sciences, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

An experiment measuring electroproduction of hypernuclei has been performed in Hall A at Jefferson Lab on a $^{12}$C target. In order to increase counting rates and provide unambiguous kaon identification two superconducting septum magnets and a Ring Imaging CHerenkov detector (RICH) were added to the Hall A standard equipment. An unprecedented energy resolution of less than 700 keV FWHM has been achieved. Thus, the observed \lam{12}{B} spectrum shows for the first time identifiable strength in the core-excited region between the ground-state {\it s}-wave $\Lambda$ peak and the 11 MeV {\it p}-wave $\Lambda$ peak., Comment: Paper submitted to Physical Review Letters

Published
2007
Full Text
View/download PDF

22. Recoil polarization measurements for neutral pion electroproduction at Q2=1(GeV/c)2 near the Δ resonance

Author

Kelly, J.J. Gayou, O. Roché, R.E. Chai, Z. Jones, M.K. Sarty, A.J. Frullani, S. Aniol, K. Beise, E.J. Benmokhtar, F. Bertozzi, W. Boeglin, W.U. Botto, T. Brash, E.J. Breuer, H. Brown, E. Burtin, E. Calarco, J.R. Cavata, C. Chang, C.C. Chant, N.S. Chen, J.-P. Coman, M. Crovelli, D. De Leo, R. Dieterich, S. Escoffier, S. Fissum, K.G. Garde, V. Garibaldi, F. Georgakopoulos, S. Gilad, S. Gilman, R. Glashausser, C. Hansen, J.-O. Higinbotham, D.W. Hotta, A. Huber, G.M. Ibrahim, H. Iodice, M. De Jager, C.W. Jiang, X. Klimenko, A. Kozlov, A. Kumbartzki, G. Kuss, M. Lagamba, L. Laveissière, G. Lerose, J.J. Lindgren, R.A. Liyange, N. Lolos, G.J. Lourie, R.W. Margaziotis, D.J. Marie, F. Markowitz, P. McAleer, S. Meekins, D. Michaels, R. Milbrath, B.D. Mitchell, J. Nappa, J. Neyret, D. Perdrisat, C.F. Potokar, M. Punjabi, V.A. Pussieux, T. Ransome, R.D. Roos, P.G. Rvachev, M. Saha, A. Širca, S. Suleiman, R. Strauch, S. Templon, J.A. Todor, L. Ulmer, P.E. Urciuoli, G.M. Weinstein, L.B. Wijsooriya, K. Wojtsekhowski, B. Zheng, X. Zhu, L.

Abstract

We measured angular distributions of differential cross section, beam analyzing power, and recoil polarization for neutral pion electroproduction at Q2=1.0(GeV/c)2 in 10 bins of 1.17≤W≤1.35 GeV across the Δ resonance. A total of 16 independent response functions were extracted, of which 12 were observed for the first time. Comparisons with recent model calculations show that response functions governed by real parts of interference products are determined relatively well near the physical mass, W=MΔ1.232 GeV, but the variation among models is large for response functions governed by imaginary parts, and for both types of response functions, the variation increases rapidly with W>MΔ. We performed a multipole analysis that adjusts suitable subsets of π≤2 amplitudes with higher partial waves constrained by baseline models. This analysis provides both real and imaginary parts. The fitted multipole amplitudes are nearly model independent-there is very little sensitivity to the choice of baseline model or truncation scheme. By contrast, truncation errors in the traditional Legendre analysis of N→Δ quadrupole ratios are not negligible. Parabolic fits to the W dependence around MΔ for the multiple analysis gives values for Re(S1+/M1+)=(-6.61±0. 18)% and Re(E1+/M1+)=(-2.87±0.19)% for the pπ0 channel at W=1.232 GeV and Q2=1.0(GeV/c)2 that are distinctly larger than those from the Legendre analysis of the same data. Similarly, the multipole analysis gives Re(S0+/M1+)=(+7.1±0.8)% at W=1.232 GeV, consistent with recent models, while the traditional Legendre analysis gives the opposite sign because its truncation errors are quite severe. © 2007 The American Physical Society.

Published
2007

23. Extraction of the Neutron Magnetic Form Factor from Quasi-Elastic 3He(pol)(e(pol),e') at Q^2 = 0.1 - 0.6 (GeV/c)^2

Author

Anderson, B., Auberbach, L., Averett, T., Bertozzi, W., Black, T., Calarco, J., Cardman, L., Cates, G.D., Chai, Z.W., Chen, J.P., Choi, Seonho, Chudakov, E., Churchwell, S., Corrado, G.S., Crawford, C., Dale, D., Deur, A., Djawotho, P., Dutta, D., Finn, J.M., Gao, H., Gilman, R., Glamazdin, A.V., Glashausser, C., Glockle, W., Golak, J., Gomez, J., Gorbenko, V.G., Hansen, J.O., Hersman, F.W., Higinbotham, D.W., Holmes, R., Howell, C.R., Hughes, E., Humensky, B., Incerti, S., De Jager, C.W., Jensen, J.S., Jiang, X., Jones, C.E., Jones, M., Kahl, R., Kamada, H., Kievsky, A., Kominis, I., Korsch, W., Kramer, K., Kumbartzki, G., Kuss, M., Lakuriqi, E., Liang, M., Liyanage, N., LeRose, J., Malov, S., Margaziotis, D.J., Martin, J.W., McCormick, K., McKeown, R.D., McIlhany, K., Meziani, Z.E., Michaels, R., Miller, G.W., Mitchell, J., Nanda, S., Pace, E., Pavlin, T., Petratos, G.G., Pomatsalyuk, R.I., Pripstein, D., Prout, D., Ransome, R.D., Roblin, Y., Rvachev, M., Saha, A., Salmè, G., Schnee, M., Seely, J., Shin, T., Slifer, K., Souder, P.A., Strauch, S., Suleiman, R., Sutter, M., Tipton, B., Todor, L., Viviani, M., Vlahovic, B., Watson, J., Williamson, C.F., Witala, H., Wojtsekhowski, B., Xiong, F., Xu, Wei-Jiang, Yeh, J., Zolnierczuk, P., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Jefferson Lab E95-001, and Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
13.40.Gp, 14.20.Dh, 24.70. +s, 25.10. +s, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

We have measured the spin-dependent transverse asymmetry, A_T', in quasi-elastic inclusive electron scattering from polarized 3He with high precision at Q^2 = 0.1 to 0.6 (GeV/c)^2. The neutron magnetic form factor, GMn, was extracted at Q^2 = 0.1 and 0.2 (GeV/c)^2 using a non-relativistic Faddeev calculation that includes both final-state interactions (FSI) and meson-exchange currents (MEC). In addition, GMn was extracted at Q^2 = 0.3 to 0.6 (GeV/c)^2 using a Plane Wave Impulse Approximation calculation. The accuracy of the modeling of FSI and MEC effects was tested and confirmed with a precision measurement of the spin-dependent asymmetry in the breakup threshold region of the 3He(pol)(e(pol),e') reaction. The total relative uncertainty of the extracted GMn data is approximately 3%. Close agreement was found with other recent high-precision GMn data in this Q^2 range., Comment: Archival paper, 17 pages, 10 figures, 5 tables, submitted to Physical Review C. v2: shortened considerably, updated comparison to theory

Published
2006
Full Text
View/download PDF

24. Proton elastic form factor ratios to $Q^2$=3.5 GeV$^2$ by polarization transfer

Author

Punjabi, V., Perdrisat, C.F., Aniol, K.A., Baker, F.T., Berthot, J., Bertin, P.Y., Bertozzi, W., Besson, A., Bimbot, L., Boeglin, W.U., Brash, E.J., Brown, D., Calarco, J.R., Cardman, L.S., Chai, Z., Chang, C.-C., Chen, J.-P., Chudakov, E., Churchwell, S., Cisbani, E., Dale, D.S., De Leo, R., Deur, A., Diederich, B., Domingo, J.J., Epstein, M.B., Ewell, L.A., G. Fissum, K., Fleck, A., Fonvieille, H., Frullani, S., Gao, J., Garibaldi, F., Gasparian, A., Gerstner, G., Gilad, S., Gilman, R., Glamazdin, A., Glashausser, C., Gomez, J., Gorbenko, V., Green, A., Hansen, J.-O., Howell, C.R., Huber, G.M., Iodice, M., De Jager, C.W., Jaminion, S., Jiang, X., Jones, M.K., Kahl, W., Kelly, J.J., Khayat, M., Kramer, L.H., Kumbartzki, G., Kuss, M., Lakuriki, E., Laveissière, G., LeRose, J.J., Liang, M., Lindgren, R.A., Liyanage, N., Lolos, G.J., Macri, R., Madey, R., Malov, S., Margaziotis, D.J., Markowitz, P., McCormick, K., McIntyre, J.I., Van Der Meer, R.L.J., Michaels, R., Milbrath, B.D., Mougey, J.Y., Nanda, S.K., Offermann, E.A.J.M., Papandreou, Z., Pentchev, L., Petratos, G.G., Piskunov, N.M., Pomatsalyuk, R.I., Prout, D.L., Quéméner, G., Ransome, R.D., Raue, B.A., Roblin, Y., Roche, R., Rutledge, G., Rutt, P.M., Saha, A., Saito, T., Sarty, A.J., Smith, T.P., Sorokin, P., Strauch, S., Suleiman, R., Takahashi, K., Templon, J.A., Todor, L., Ulmer, P.E., Urciuoli, G.M., Vernin, P., Vlahovic, B., Voskanyan, H., Wijesooriya, K., Wojtsekhowski, B.B., Woo, R.J., Xiong, F., Zainea, G.D., Zhou, Z.-L., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), HALL A, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)

Subjects
electron-proton scattering, protons, polarisation in elementary particle interactions, electromagnetic form factors, FOS: Physical sciences, 25.30.Bf, 13.40.Gp, 24.85.+p, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

The ratio of the proton elastic electromagnetic form factors, $G_{Ep}/G_{Mp}$, was obtained by measuring $P_{t}$ and $P_{\ell}$, the transverse and longitudinal recoil proton polarization components, respectively, for the elastic $\vec e p \to e\vec p$ ~reaction in the four-momentum transfer squared range of 0.5 to 3.5 GeV$^2$. In the single-photon exchange approximation, the ratio $G_{Ep}/G_{Mp}$ is directly proportional to the ratio $P_t/P_{\ell}$. The simultaneous measurement of $P_{t}$ and $P_{\ell}$ in a polarimeter reduces systematic uncertainties. The results for the ratio $G_{Ep}/G_{Mp}$ show a systematic decrease with increasing $Q^2$, indicating for the first time a definite difference in the distribution of charge and magnetization in the proton. The data have been re-analyzed and systematic uncertainties have become significantly smaller than previously published results., Comment: 31 pages, 29 gfigures, submitted to Phys. Rev. C

Published
2005
Full Text
View/download PDF

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

Author

Rvachev, M.M., Benmokhtar, F., Penel-Nottaris, E., Aniol, K.A., Bertozzi, W., Boeglin, W.U., Butaru, F., Calarco, J.R., Chai, Z., Chang, C.C., Chen, J.P., Chudakov, E., Cisbani, E., Cochran, A., Cornejo, J., Dieterich, S., Djawotho, P., Duran, W., Epstein, M.B., Finn, J.M., Fissum, K.G., Frahi-Amroun, A., Frullani, S., Furget, C., Garibaldi, F., Gayou, O., Gilad, S., Gilman, R., Glashausser, C., Hansen, J.O., Higinbotham, D.W., Hotta, A., Hu, B., Iodice, M., Iomni, R., De Jager, C.W., Jiang, X., Jones, M.K., Kelly, J.J., Kox, S., Kuss, M., Laget, J.M., De Leo, R., LeRose, J.J., Liatard, E., Lindgren, R., Liyanage, N., Lourie, R.W., Malov, S., J. Margaziotis, D., Markowitz, P., Merchez, F., Michaels, R., Mitchell, J., Mougey, J., Perdrisat, C.F., Punjabi, V.A., Quéméner, G., Ransome, R.D., Réal, J.S., Roché, R., Sabatié, F., Saha, A., Simon, D., Strauch, S., Suleiman, R., Tamae, T., Templon, J.A., Tieulent, R., Ueno, H., Ulmer, P.E., Urciuoli, G.M., Voutier, E., Wijesooriya, K., Wojtsekhowski, B., Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), and HALL A

Subjects
electron-nucleus reactions, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, nuclei with mass number 1 to 5, 21.45.+v, 25.30.Dh, 27.10.+h
Abstract

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, respectively. The $^{3}He(e,e'p)^{2}H$ cross section was measured for missing momenta up to 1000 MeV/c, while the ATL asymmetry was extracted for missing momenta up to 660 MeV/c. For missing momenta up to 150 MeV/c, the cross section is described by variational calculations using modern 3He wave functions. For missing momenta from 150 to 750 MeV/c, strong final-state interaction effects are observed. Near 1000 MeV/c, the experimental cross section is more than an order of magnitude larger than predicted by available theories. The ATL asymmetry displays characteristic features of broken factorization with a structure that is similar to that generated by available models.

Published
2005
Full Text
View/download PDF

26. 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 $GeV^2$

Author

Laveissiere, G., Degrande, N., Jaminion, S., Jutier, C., Todor, L., Di Salvo, R., Van Hoorebeke, L., Alexa, L.C., Anderson, B.D., Aniol, K.A., Arundell, K., Audit, G., Auerbach, L., Baker, F.T., Baylac, M., Berthot, J., Bertin, P.Y., Bertozzi, W., Bimbot, L., Boeglin, W.U., Brash, E.J., BRETON, Vincent, Breuer, H., Burtin, E., Calarco, J.R., Cardman, L.S., Cavata, C., Chang, C.C., Chen, J.P., Chudakov, E., Cisbani, E., Dale, D.S., De Jager, C.W., De Leo, R., Deur, A., D'Hose, N., Dodge, G.E., Domingo, J.J., Elouadrhiri, L., Epstein, M.B., Ewell, L.A., Finn, J.M., Fissum, K.G., Fonvieille, H., Fournier, G., Frois, B., Frullani, S., Furget, C., Gao, H., Gao, J., Garibaldi, F., Gasparian, A., Gilad, S., Gilman, R., Glamazdin, A., Glashausser, C., Gomez, J., Gorbenko, V., Grenier, P., Guichon, P.A.M., Hansen, J.O., Holmes, R., Holtrop, M., Howell, C., Huber, G.M., Hyde-Wright, C.E., Incerti, S., Iodice, M., Jardillier, J., Jones, M.K., Kahl, W., Kamalov, S., Kato, S., Katramatou, A.T., Kelly, J.J., Kerhoas, S., Ketikyan, A., Khayat, M., Kino, K., Kox, S., Kramer, L.H., Kumar, K.S., Kumbartzki, G., Kuss, M., Leone, A., LeRose, J.J., Liang, M., Lindgren, R.A., Liyanage, N., Lolos, G.J., Lourie, R.W., Madey, R., Maeda, K., Malov, S., Manley, D.M., Marchand, C., Marchand, D., Margaziotis, D.J., Markowitz, P., Marroncle, J., Martino, J., Martoff, C.J., McCormick, K., McIntyre, J., Mehrabyan, S., Merchez, F., Meziani, Z.E., Michaels, R., Miller, G.W., Mougey, J.Y., Nanda, S.K., Neyret, D., Offermann, E.A.J.M., Papandreou, Z., Perdrisat, C.F., Perrino, R., Petratos, G.G., Platchkov, S., Pomatsalyuk, R., Prout, D.L., Punjabi, V.A., Pussieux, T., Quéméner, G., Ransome, R.D., Ravel, O., Real, J.S., Renard, F., Roblin, Y., Rowntree, D., Rutledge, G., Rutt, P.M., Saha, A., Saito, T., Sarty, A.J., Serdarevic, A., Smith, T., Smirnov, George, Soldi, K., Sorokin, P., Souder, P.A., Suleiman, R., Templon, J.A., Terasawa, T., Tiator, L., Tieulent, R., Tomasi-Gustaffson, E., Tsubota, H., Ueno, H., Ulmer, P.E., Urciuoli, G.M., Van De Vyver, R., Van Der Meer, R.L.J., Vernin, P., Vlahovic, B., Voskanyan, H., Voutier, E., Watson, J.W., Weinstein, L.B., Wijesooriya, K., Wilson, R., Wojtsekhowski, B.B., Zainea, D.G., Zhang, W.M., Zhao, J., Zhou, Z.L., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Laboratoire SUBATECH Nantes (SUBATECH), Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), HALL A, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes)

Subjects
High Energy Physics - Experiment (hep-ex), 13.60.-r, 13.60.Fz, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], FOS: Physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment, High Energy Physics - Experiment
Abstract

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 obtained at center of mass (CM) backward angle, theta_gamma_gamma*, in a range of total (gamma* p) CM energy W from the proton mass up to W = 1.91 GeV. The data show resonant structures in the first and second resonance regions, and are well reproduced at higher W by the Bethe-Heitler+Born cross section, including t-channel pi0-exchange. At high W, our data, together with existing real photon data, show a striking Q**2 independence. Our measurement of the ratio of H(e,e'p)gamma to H(e,e'p)pi0 cross sections is presented and compared to model predictions., 6 pages, 5 figures, Bibtex format, to be submitted to Physical Review Letters includes cross section tables

Published
2004

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

Author

Laveissiere, G., Todor, L., Degrande, N., Jaminion, S., Jutier, C., Di Salvo, R., Van Hoorebeke, L., Alexa, L.C., Anderson, B.D., Aniol, K.A., Arundell, K., Audit, G., Auerbach, L., Baker, F.T., Baylac, M., Berthot, J., Bertin, P.Y., Bertozzi, W., Bimbot, L., Boeglin, W.U., Brash, E.J., BRETON, Vincent, Breuer, H., Burtin, E., Calarco, J.R., Cardman, L.S., Cavata, C., Chang, C.C., Chen, J.P., Chudakov, E., Cisbani, E., Dale, D.S., De Jager, C.W., De Leo, R., Deur, A., D'Hose, N., Dodge, G.E., Domingo, J.J., Elouadrhiri, L., Epstein, M.B., Ewell, L.A., Finn, J.M., Fissum, K.G., Fonvieille, H., Fournier, G., Frois, B., Frullani, S., Furget, C., Gao, H., Gao, J., Garibaldi, F., Gasparian, A., Gilad, S., Gilman, R., Glamazdin, A., Glashausser, C., Gomez, J., Gorbenko, V., Grenier, P., Guichon, P.A.M., Hansen, J.O., Holmes, R., Holtrop, M., Howell, C., Huber, G.M., Hyde-Wright, C.E., Incerti, S., Iodice, M., Jardillier, J., Jones, M.K., Kahl, W., Kato, S., Katramatou, A.T., Kelly, J.J., Kerhoas, S., Ketikyan, A., Khayat, M., Kino, K., Kox, S., Kramer, L.H., Kumar, K.S., Kumbartzki, G., Kuss, M., Leone, A., LeRose, J.J., Liang, M., Lindgren, R.A., Liyanage, N., Lolos, G.J., Lourie, R.W., Madey, R., Maeda, K., Malov, S., Manley, D.M., Marchand, C., Marchand, D., Margaziotis, D.J., Markowitz, P., Marroncle, J., Martino, J., Martoff, C.J., McCormick, K., McIntyre, J., Mehrabyan, S., Merchez, F., Meziani, Z.E., Michaels, R., Miller, G.W., Mougey, J.Y., Nanda, S.K., Neyret, D., Offermann, E.A.J.M., Papandreou, Z., Perdrisat, C.F., Perrino, R., Petratos, G.G., Platchkov, S., Pomatsalyuk, R., Prout, D.L., Punjabi, V.A., Pussieux, T., Quéméner, G., Ransome, R.D., Ravel, O., Real, J.S., Renard, F., Roblin, Y., Rowntree, D., Rutledge, G., Rutt, P.M., Saha, A., Saito, T., Sarty, A.J., Serdarevic, A., Smith, T., Smirnov, George, Soldi, K., Sorokin, P., Souder, P.A., Suleiman, R., Templon, J.A., Terasawa, T., Tieulent, R., Tomasi-Gustaffson, E., Tsubota, H., Ueno, H., Ulmer, P.E., Urciuoli, G.M., Van De Vyver, R., Van Der Meer, R.L.J., Vernin, P., Vlahovic, B., Voskanyan, H., Voutier, E., Watson, J.W., Weinstein, L.B., Wijesooriya, K., Wilson, R., Wojtsekhowski, B.B., Zainea, D.G., Zhang, W.M., Zhao, J., Zhou, Z.L., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Laboratoire SUBATECH Nantes (SUBATECH), Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), HALL A, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes)

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), 13.60.Fz, Elastic and Compton scattering, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], FOS: Physical sciences, Physics::Accelerator Physics
Abstract

We report a Virtual Compton Scattering study of the proton at low CM energies. We have determined the structure functions $P_{LL}-P_{TT}/\epsilon$ and $P_{LT}$, and the electric and magnetic Generalized Polarizabilities (GPs) $\alpha_E(Q2)$ and $\beta_M(Q2)$ at momentum transfer Q2= 0.92 and 1.76 GeV2. The electric GP shows a strong fall-off with Q2, and its global behavior does not follow a simple dipole form. The magnetic GP shows a rise and then a fall-off; this can be interpreted as the dominance of a long-distance diamagnetic pion cloud at low Q2, compensated at higher Q2 by a paramagnetic contribution from $\pi N$ intermediate states., Comment: 4 pages, 2 Figs. Version for PRL after PRL cancelled their request for reducing length of paper

Published
2004
Full Text
View/download PDF

28. Measurement of the 3He(e,e'p)pn reaction at high missing energies and momenta

Author

Benmokhtar, F., Rvachev, M.M., Penel-Nottaris, E., Aniol, K.A., Bertozzi, W., Boeglin, W.U., Butaru, F., Calarco, J.R., Chai, Z., Chang, C.C., Chen, J.-P., Chudakov, E., Cisbani, E., Cochran, A., Cornejo, J., Dieterich, S., Djawotho, P., Duran, W., Epstein, M.B., Finn, J.M., Fissum, K.G., Frahi-Amroun, A., Frullani, S., Furget, C., Garibaldi, F., Gayou, O., Gilad, S., Gilman, R., Glashausser, C., Hansen, J.-O., Higinbotham, D.W., Hotta, A., Hu, B., Iodice, M., Iomni, R., De Jager, C.W., Jiang, X., Jones, M.K., Kelly, J.J., Kox, S., Kuss, M., Laget, J.M., De Leo, R., LeRose, J.J., Liatard, E., Lindgren, R., Liyanage, N., Lourie, R.W., Malov, S., Margaziotis, D.J., Markowitz, P., Merchez, F., Michaels, R., Mitchell, J., Mougey, J., Perdrisat, C.F., Punjabi, V.A., Quéméner, G., Ransome, R.D., Réal, J.S., Roché, R., Sabatié, F., Saha, A., Simon, D., Strauch, S., Suleiman, R., Tamae, T., Templon, J.A., Tieulent, R., Ueno, H., Ulmer, P.E., Urciuoli, G.M., Voutier, E., Wijesooriya, K., Wojtsekhowski, B., Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), and HALL A

Subjects
electron-nucleus reactions, 25.30.Fj, 13.75.Cs, 24.85.+p, 27.10.+h, Nuclear Theory, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment (nucl-ex), Nuclear Experiment, nuclei with mass number 1 to 5
Abstract

Results of the Jefferson Lab Hall A quasielastic 3He(e,e'p)pn measurements are presented. These measurements were performed at fixed transferred momentum and energy, q = 1502 MeV/c and omega = 840 MeV, respectively, for missing momenta p_m up to 1 GeV/c and missing energies in the continuum region, up to pion threshold; this kinematic coverage is much more extensive than that of any previous experiment. The cross section data are presented along with the effective momentum density distribution and compared to theoretical models., Comment: 5 pages, 3 figures, updated to reflect published paper: minor text changes from previous version along with updated and added references

Published
2004
Full Text
View/download PDF

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

Author

Laveissiere, G., Degrande, N., Jaminion, S., Jutier, C., Todor, L., Di Salvo, R., Van Hoorebeke, L., Alexa Stony, L.C., Anderson, B.D., Aniol, K.A., Arundell, K., Audit, G., Auerbach, L., Baker, F.T., Baylac, M., Berthot, J., Bertin, P.Y., Bertozzi, W., Bimbot, L., Boeglin, W.U., Brash, E.J., BRETON, Vincent, Breuer, H., Burtin, E., Calarco, J.R., Cardman, L.S., Cavata, C., Chang, C.C., Chen, J.P., Chudakov, E., Cisbani, E., Dale, D.S., De Jager, C.W., De Leo, R., Deur, A., D'Hose, N., Dodge, G.E., Domingo, J.J., Elouadrhiri, L., Epstein, M.B., Ewell, L.A., Finn, J.M., Fissum, K.G., Fonvieille, H., Fournier, G., Frois, B., Frullani, S., Furget, C., Gao, H., Gao, J., Garibaldi, F., Gasparian, A., Gilad, S., Gilman, R., Glamazdin, A., Glashausser, C., Gomez, J., Gorbenko, V., Grenier, P., Guichon, P.A.M., Hansen, J.O., Holmes, R., Holtrop, M., Howell, C., Huber, G.M., Hyde-Wright, C.E., Incerti, S., Iodice, M., Jardillier, J., Jones, M.K., Kahl, W., Kamalov, S., Kato, S., Katramatou, A.T., Kelly, J.J., Kerhoas, S., Ketikyan, A., Khayat, M., Kino, K., Kox, S., Kramer, L.H., Kumar, K.S., Kumbartzki, G., Kuss, M., Leone, A., LeRose, J.J., Liang, M., Lindgren, R.A., Liyanage, N., Lolos, G.J., Lourie, R.W., Madey, R., Maeda, K., Malov, S., Manley, D.M., Marchand, C., Marchand, D., Margaziotis, D.J., Markowitz, P., Marroncle, J., Martino, J., Martoff, C.J., McCormick, K., McIntyre, J., Mehrabyan, S., Merchez, F., Meziani, Z.E., Michaels, R., Miller, G.W., Mougey, J.Y., Nanda, S.K., Neyret, D., Offermann, E.A.J.M., Papandreou, Z., Perdrisat, C.F., Perrino, R., Petratos, G.G., Platchkov, S., Pomatsalyuk, R., Prout, D.L., Punjabi, V.A., Pussieux, T., Quéméner, G., Ransome, R.D., Ravel, O., Real, J.S., Renard, F., Roblin, Y., Rowntree, D., Rutledge, G., Rutt, P.M., Saha, A., Saito, T., Sarty, A.J., Serdarevic, A., Smith, T., Smirnov, George, Soldi, K., Sorokin, P., Souder, P.A., Suleiman, R., Templon, J.A., Terasawa, T., Tiator, L., Tieulent, R., Tomasi-Gustaffson, E., Tsubota, H., Ueno, H., Ulmer, P.E., Urciuoli, G.M., Van De Vyver, R., Van Der Meer, R.L.J., Vernin, P., Vlahovic, B., Voskanyan, H., Voutier, E., Watson, J.W., Weinstein, L.B., Wijesooriya, K., Wilson, R., Wojtsekhowski, B.B., Zainea, D.G., Zhang, W.M., Zhao, J., Zhou, Z.L., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Laboratoire SUBATECH Nantes (SUBATECH), Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), HALL A, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes)

Subjects
electron-proton interactions, 13.60.Le, 14.20.Gk, Nuclear Theory, pion production, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, hadron electroproduction, Nuclear Experiment
Abstract

PHASE; International audience; 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 from the 4 GeV electron beam in Jefferson Lab's Hall A. The data span the range of the total (gamma*p) center-of-mass energy W from the pion production threshold to W=2.0 GeV. The differential cross sections sigmaT+epsilonsigmaL, sigmaTL, and sigmaTT were separated from the azimuthal distribution and are presented together with the MAID and SAID parametrizations.

Published
2004
Full Text
View/download PDF

30. 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

Author

Laveissiere, G., Todor, L., Degrande, N., Jaminion, S., Jutier, C., Di Salvo, R., Van Hoorebeke, L., Alexa, L.C., Anderson, B.D., Aniol, K.A., Arundell, K., Audit, G., Auerbach, L., Baker, F.T., Baylac, M., Berthot, J., Bertin, P.Y., Bertozzi, W., Bimbot, L., Boeglin, W.U., Brash, E.J., BRETON, Vincent, Breuer, H., Burtin, E., Calarco, J.R., Cardman, L.S., Cavata, C., Chang, C.C., Chen, J.P., Chudakov, E., Cisbani, E., Dale, D.S., De Jager, C.W., De Leo, R., Deur, A., D'Hose, N., Dodge, G.E., Domingo, J.J., Elouadrhiri, L., Epstein, M.B., Ewell, L.A., Finn, J.M., Fissum, K.G., Fonvieille, H., Fournier, G., Frois, B., Frullani, S., Furget, C., Gao, H., Gao, J., Garibaldi, F., Gasparian, A., Gilad, S., Gilman, R., Glamazdin, A., Glashausser, C., Gomez, J., Gorbenko, V., Grenier, P., Guichon, P.A.M., Hansen, J.O., Holmes, R., Holtrop, M., Howell, C., Huber, G.M., Hyde-Wright, C.E., Incerti, S., Iodice, M., Jardillier, J., Jones, M.K., Kahl, W., Kato, S., Katramatou, A.T., Kelly, J.J., Kerhoas, S., Ketikyan, A., Khayat, M., Kino, K., Kox, S., Kramer, L.H., Kumar, K.S., Kumbartzki, G., Kuss, M., Leone, A., LeRose, J.J., Liang, M., Lindgren, R.A., Liyanage, N., Lolos, G.J., Lourie, R.W., Madey, R., Maeda, K., Malov, S., Manley, D.M., Marchand, C., Marchand, D., Margaziotis, D.J., Markowitz, P., Marroncle, J., Martino, J., Martoff, C.J., McCormick, K., McIntyre, J., Mehrabyan, S., Merchez, F., Meziani, Z.E., Michaels, R., Miller, G.W., Mougey, J.Y., Nanda, S.K., Neyret, D., Offermann, E.A.J.M., Papandreou, Z., Pasquini, B., Perdrisat, C.F., Perrino, R., Petratos, G.G., Platchkov, S., Pomatsalyuk, R., Prout, D.L., Punjabi, V.A., Pussieux, T., Quéméner, G., Ransome, R.D., Ravel, O., Real, J.S., Renard, F., Roblin, Y., Rowntree, D., Rutledge, G., Rutt, P.M., Saha, A., Saito, T., Sarty, A.J., Serdarevic, A., Smith, T., Smirnov, George, Soldi, K., Sorokin, P., Souder, P.A., Suleiman, R., Templon, J.A., Terasawa, T., Tieulent, R., Tomasi-Gustaffson, E., Tsubota, H., Ueno, H., Ulmer, P.E., Urciuoli, G.M., Vanderhaeghen, M., Van De Vyver, R., Van Der Meer, R.L.J., Vernin, P., Vlahovic, B., Voskanyan, H., Voutier, E., Watson, J.W., Weinstein, L.B., Wijesooriya, K., Wilson, R., Wojtsekhowski, B.B., Zainea, D.G., Zhang, W.M., Zhao, J., Zhou, Z.L., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire SUBATECH Nantes (SUBATECH), Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), HALL A, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes)

Subjects
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Abstract

PHASE

Published
2004

31. 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

Author

Jaminion, S., Degrande, N., Laveissiere, G., Jutier, C., Todor, L., Di Salvo, R., Van Hoorebeke, L., Alexa, S., Anderson, B.D., Aniol, K.A., Arundell, K., Audit, G., Auerbach, L., Baker, F.T., Baylac, M., Berthot, J., Bertin, P.Y., Bertozzi, W., Bimbot, L., Boeglin, W.U., Brash, E.J., BRETON, Vincent, Breuer, H., Burtin, E., Calarco, J.R., Cardman, L.S., Cavata, C., Chang, C.C., Chen, J.P., Chudakov, E., Cisbani, E., Dale, D.S., De Jager, C.W., De Leo, R., Deur, A., D'Hose, N., Dodge, G.E., Domingo, J.J., Elouadrhiri, L., Epstein, M.B., Ewell, L.A., Finn, J.M., Fissum, K.G., Fonvieille, H., Fournier, G., Frois, B., Frullani, S., Furget, C., Gao, H., Gao, J., Garibaldi, F., Gasparian, A., Gilad, S., Gilman, R., Glamazdin, A., Glashausser, C., Gomez, J., Gorbenko, V., Grenier, P., Guichon, P.A.M., Hansen, J.O., Holmes, R., Holtrop, M., Howell, C., Huber, G.M., Hyde-Wright, C.E., Incerti, S., Iodice, M., Jardillier, J., Jones, M.K., Kahl, W., Kato, S., Katramatou, A.T., Kelly, J.J., Kerhoas, S., Ketikyan, A., Khayat, M., Kino, K., Kox, S., Kramer, L.H., Kumar, K.S., Kumbartzki, G., Kuss, M., Leone, A., LeRose, J.J., Liang, M., Lindgren, R.A., Liyanage, N., Lolos, G.J., Lourie, R.W., Madey, R., Maeda, K., Malov, S., Manley, D.M., Marchand, C., Marchand, D., Margaziotis, D.J., Markowitz, P., Marroncle, J., Martino, J., Martoff, C.J., McCormick, K., McIntyre, J., Mehrabyan, S., Merchez, F., Meziani, Z.E., Michaels, R., Miller, G.W., Mougey, J.Y., Nanda, S.K., Neyret, D., Offermann, E.A.J.M., Papandreou, Z., Perdrisat, C.F., Perrino, R., Petratos, G.G., Platchkov, S., Pomatsalyuk, R., Prout, D.L., Punjabi, V.A., Pussieux, T., Quéméner, G., Ransome, R.D., Ravel, O., Real, J.S., Renard, F., Roblin, Y., Rowntree, D., Rutledge, G., Rutt, P.M., Saha, A., Saito, T., Sarty, A.J., Serdarevic, A., Smith, T., Smirnov, George, Soldi, K., Sorokin, P., Souder, P.A., Suleiman, R., Templon, J.A., Terasawa, T., Tieulent, R., Tomasi-Gustaffson, E., Tsubota, H., Ueno, H., Ulmer, P.E., Urciuoli, G.M., Van De Vyver, R., Van Der Meer, R.L.J., Vernin, P., Vlahovic, B., Voskanyan, H., Voutier, E., Watson, J.W., Weinstein, L.B., Wijesooriya, K., Wilson, R., Wojtsekhowski, B.B., Zainea, D.G., Zhang, W.M., Zhao, J., Zhou, Z.L., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire SUBATECH Nantes (SUBATECH), Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), HALL A, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes)

Subjects
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Abstract

PHASE

Published
2004

32. Polarization transfer in the He-4((e)over-right-arrow,e '(p)over-right-arrow)H-3 reaction up to Q(2)=2.6 (GeV/c)(2)

Author

Strauch, S., Dieterich, S., Aniol, K.A., Annand, J.R.M., Baker, O.K., Bertozzi, W., Boswell, M., Brash, E.J., Chai, Z., Chen, J.P., Christy, M.E., Chudakov, E., Cochran, A., De Leo, R., Ent, R., Epstein, M.B., Finn, J.M., Fissum, K.G., Forest, T.A., Frullani, S., Garibaldi, F., Gasparian, A., Gayou, O., Gilad, S., Gilman, R., Glashausser, C., Gomez, J., Gorbenko, V., Gueye, P.L.J., Hansen, J.O., Higinbotham, D.W., Hu, B., Hyde-Wright, C.E., Ireland, D.G., Jackson, C., de Jager, C.W., Jiang, X., Jones, C., Jones, M.K., Kellie, J.D., Kelly, J.J., Keppel, C.E., Kumbartzki, G., Kuss, M., LeRose, J.J., Livingston, K., Liyanage, N., Malov, S., Margaziotis, D.J., Meekins, D., and van den Brand, J.F.J.

Subjects
BOUND NUCLEONS, COULOMB SUM-RULE, FORM-FACTORS, DEPENDENCE, SCATTERING, RESPONSE FUNCTIONS
Abstract

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 transfer coefficients differs from a fully relativistic calculation, favoring the inclusion of a medium modification of the proton form factors predicted by a quark-meson coupling model. In addition, the measured induced polarizations agree reasonably well with the fully relativistic calculation indicating that the treatment of final-state interactions is under control.

Published
2003

33. 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)$^2$

Author

Xu, Wei-Jiang, Anderson, B., Auberbach, L., Averett, T., Bertozzi, W., Black, T., Calarco, J., Cardman, L., Cates, G.D., Chai, Z.W., Chen, J.P., Choi, S., Chudakov, E., Churchwell, S., Corrado, G.S., Crawford, C., Dale, D., Deur, A., Djawotho, P., Donnelly, T.W., Dutta, D., Finn, J.M., Gao, H., Gilman, R., Glamazdin, A.V., Glashausser, C., Glockle, W., Golak, J., Gomez, J., Gorbenko, V.G., Hansen, J.O., Hersman, F.W., Higinbotham, D.W., Holmes, R., Howell, C.R., Hughes, E., Humensky, B., Incerti, S., De Jager, C.W., Jensen, J.S., Jiang, X., Jones, C.E., Jones, M., Kahl, R., Kamada, H., Kievsky, A., Kominis, I., Korsch, W., Kramer, K., Kumbartzki, G., Kuss, M., Lakuriqi, E., Liang, M., Liyanage, N., LeRose, J., Malov, S., Margaziotis, D.J., Martin, J.W., McCormick, K., McKeown, R.D., McIlhany, K., Meziani, Z.E., Michaels, R., Miller, G.W., Mitchell, J., Nanda, S., Pace, E., Pavlin, T., Petratos, G.G., Pomatsalyuk, R.I., Pripstein, D., Prout, D., Ransome, R.D., Roblin, Y., Rvachev, M., Saha, A., Salme, G., Schnee, M., Shin, T., Slifer, K., Souder, P.A., Strauch, S., Suleiman, R., Sutter, M., Tipton, B., Todor, L., Viviani, M., Vlahovic, B., Watson, J., Williamson, C.F., Witala, H., Wojtsekhowski, B., Xiong, F., Yeh, J., Zolnierczuk, P., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), HALL A, and Chadelas, Michèle

Subjects
[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published
2003

34. Measurement of $G_{Ep}/G_{Mp}$ in $\vec{e}p\rightarrow e\vec{p}$ to $Q^2 = 5.6 GeV^2$

Author

Gayou, O., Benmokhtar, F., Bertozzi, W., Bimbot, L., Brash, E.J., Calarco, J.R., Cavata, C., Chai, Z., Chang, C.C., Chang, T., Chen, J.P., Chudakov, E., de Leo, R., Dieterich, S., Endres, R., Epstein, M.B., Escoffier, S., Fissum, K.G., Fonvieille, H., Frullani, S., Gao, J., Garibaldi, F., Gilad, S., Gilman, R., Glamazdin, A., Glashausser, C., Gomez, J., Gorbenko, V., Hansen, J.O., Higinbotham, D.W., Huber, G.M., Iodice, M., de Jager, C.W., Jiang, X., Jones, M.K., Kelly, J.J., Khandaker, M., Kozlov, A.., Kramer, K.M., Kumbartzki, G., Lerose, J.J., Lhuillier, D., Lindgren, R.A., Liyanage, N., Lolos, G.L., Margaziotis, D.J., Marie, F., Markowitz, P., Mccormick, K., Michaels, R., Milbrath, M.D., Nanda, S.K., Neyret, D., Papandreou, Z., Pentchev, L., Perdrisat, C.F., Piskunov, N.M., Punjabi, V., Pussieux, T., Quéméner, G., Ransome, R.D., Raue, B.A., Roch, R., Rvachev, M., Saha, A., Salgado, C., Sirca, S., Sitnik, I., Strauch, S., Todor, L., Tomasi-Gustafsson, E., Urciuoli, G.M., Voskanyan, H., Wijesooriya, K., Wojtsekhowski, B.B., Zheng, X., Zhu, L., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), HALL A, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Abstract

The ratio of the electric and magnetic form factors of the proton, GEp/GMp, was measured at the Thomas Jefferson National Accelerator Facility (JLab) using the recoil polarization technique. The ratio of the form factors is directly proportional to the ratio of the transverse to longitudinal components of the polarization of the recoil proton in the elastic e⃗p→ep⃗\vec ep \to e\vec pep→ep ​ reaction. The new data presented in this article span the range 3.5 < Q2 < 5.6 GeV2 and are well described by a linear Q2 fit. Also, the ratio QF2p/F1p reaches a constant value above Q2=2 GeV2

Published
2002
Full Text
View/download PDF

35. Measurements of the elastic electromagnetic form factor ratio $\mu$(p)G(Ep)/G(Mp) via polarization transfer

Author

Gayou, O., Wijesooriya, K., Afanasev, A., Amarian, M., Aniol, K., Becher, S., Benslama, K., Bimbot, L., Bosted, P., Brash, E., Calarco, J., Chai, Z., Chang, C.C., Chang, T., Chen, J.P., Choi, S., Chudakov, E., Churchwell, S., Crovelli, D., Dieterich, S., Dumalski, S., Dutta, D., Epstein, M., Fissum, K., Fox, B., Frullani, S., Gao, H., Gao, J., Garibaldi, F., Gilman, R., Glamazdin, S., Glashausser, C., Gomez, J., Gorbenko, V., Hansen, O., Holt, R.J., Hovdebo, J., Huber, G.M., De-Jager, C.W., Jiang, X., Jones, C., Jones, M.K., Kelly, J., Kinney, E., Kooijman, E., Kumbartzki, G., Kuss, M., Lerose, J., Liang, M., Lindgren, R., Liyanage, N., Malov, S., Margaziotis, D.J., Markowitz, P., Mccormick, K., Meekins, D., Meziani, Z.E., Michaels, R., Mitchell, J., Morand, L., Perdrisat, C.F., Pomatsalyuk, R., Punjabi, V., Ransome, R.D., Roche, R., Rvachev, M., Saha, A., Sarty, A., Schulte, E.C., Simon, D., Strauch, S., Suleiman, R., Todor, L., Ulmer, P.E., Urciuoli, G.M., Wojtsekhowski, B., Xiong, F., Xu, Wei-Jiang, Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), HALL A, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published
2001

36. Precision measurement of the spin dependent asymmetry in the threshold region of $^{3}\vec{H}e(\vec{e},\prime{e})$

Author

Xiong, F., Dutta, D., Xu, Wei-Jiang, Anderson, B., Auberbach, L., Averett, T., Bertozzi, W., Black, T., Calarco, J., Cates, G.D., Chai, Z.W., Chen, J.P., Choi, S., Chudakov, E., Churchwell, S., Corrado, G.S., Crawford, C., Dale, D., Deur, A., Djawotho, P., Filippone, B.W., Finn, J.M., Gao, H., Gilman, R., Glamazdin, A.V., Glashausser, C., Glockle, W., Golak, J., Gomez, J., Gorbenko, V.G., Hansen, J.O., Hersman, F.W., Higinbotham, D.W., Holmes, R., Howell, C.R., Hughes, E., Humensky, B., Incerti, S., de Jager, C.W., Jensen, J.S., Jiang, X., Jones, C.E., Jones, M., Kahl, R., Kamada, H., Kievsky, A., Kominis, I., Korsch, W., Kramer, K., Kumbartzki, G., Kuss, M., Lakuriqi, E., Liang, M., Liyanage, N., Lerose, J., Malov, S., Margaziotis, D.J., Martin, J.W., Mccormick, K., Mckeown, R.D., Mcilhany, K., Meziani, Z.E., Michaels, R., Miller, G.W., Pace, E., Pavlin, T., Petratos, G.G., Pomatsalyuk, R.I., Pripstein, D., Prout, D., Ransome, R.D., Roblin, Y., Rvachev, M., Saha, A., Salme, G., Schnee, M., Shin, T., Slifer, K., Souder, P.A., Strauch, S., Suleiman, R., Sutter, M., Tipton, B., Todor, L., Viviani, M., Vlahovic, B., Watson, J., Williamson, C.F., Witala, H., Wojtsekhowski, B., Yeh, J., Zolnierczuk, P., Pellet, Jeanine, Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and HALL A

Subjects
[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published
2001

37. $G_{E_p}/G_{M_p}$ ratio by polarization transfer in $\vec{e}p\rightarrow e\vec{p}$

Author

Jones, M.K., Aniol, K.A., Baker, F.T., Berthot, J., Bertin, P.Y., Bertozzi, W., Besson, A., Bimbot, L., Boeglin, W.U., Brash, E.J., Brown, D., Calarco, J.R., Cardman, L.S., Chang, C.C., Chen, J.P., Chudakov, E., Churchwell, S., Cisbani, E., Dale, D.S., De Leo, R., Deur, A., Diederich, B., Domingo, J.J., Epstein, M.B., Ewell, L.A., Fissum, K.G., Fleck, A., Fonvieille, H., Frullani, S., Gao, J., Garibaldi, F., Gasparian, A., Gerstner, G., Gilad, S., Gilman, R., Glamazdin, A., Glashausser, C., Gomez, J., Gorbenko, V., Green, A., Hansen, J.O., Howell, C.R., Huber, G.M., Iodice, M., De Jager, C.W., Jaminion, S., Jiang, X., Kahl, W., Kelly, J.J., Khayat, M., Kramer, L.H., Kumbartzki, G., Kuss, M., Lakuriki, E., Laveissiere, G., Le Rose, J.J., Liang, M., Lindgren, R.A., Liyanage, N., Lolos, G.J., Macri, R., Madey, R., Malov, S., Margaziotis, D.J., Markowitz, P., McCormick, K., McIntyre, J.I., Vander Meer, R.L.J., Michaels, R., Milbrath, B.D., Mougey, J.Y., Nanda, S.K., Offermann, E.A.J.M., Papandreou, Z., Perdrisat, C.F., Petratos, G.G., Piskunov, N.M., Pomatsalyuk, R.I., Prout, D.L., Punjabi, V., Quéméner, G., Ransome, R.D., Raue, B.A., Roblin, Y., Roche, R., Rutledge, G., Rutt, P.M., Saha, A., Saito, T., Sarty, A.J., Smith, T.P., Sorokin, P., Strauch, S., Suleiman, R., Takahashi, K., Templon, J.A., Todor, L., Ulmer, P.E., Urciuoli, G.M., Vernin, P., Vlahovic, B., Voskanian, H., Wijesooriya, K., Wojtsekhowski, B.B., Woo, R.J., Xiong, F., Zainea, G.D., Zhou, Z.L., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), HALL A, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics::Accelerator Physics, Nuclear Experiment
Abstract

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 electrons with unpolarized protons. The ratio of the electric to magnetic form factor is proportional to the ratio of the transverse to longitudinal recoil polarizations. The ratio was measured over a range of four-momentum transfer squared between 0.5 and 3.5 GeV-squared. Simultaneous measurement of transverse and longitudinal polarizations in a polarimeter provides good control of the systematic uncertainty. The results for the ratio of the proton's electric to magnetic form factors show a systematic decrease with increasing four momentum squared, indicating for the first time a marked difference in the spatial distribution of charge and magnetization currents in the proton.

Published
2000
Full Text
View/download PDF

38. Charge form factor of the neutron from the reaction (2)(H)over-right-arrow((e)over-right- arrow,e ' n)p

Author

Passchier, I., Alarcon, R., Bauer, T.S., Boersma, D., van den Brand, J.F.J., van Buuren, L.D., Bulten, H.J., Ferro-Luzzi, M., Heimberg, P., Higinbotham, D.W., de Jager, C.W., Klous, S., Kolster, H., Lang, J., Militsyn, B.L., Nikolenko, D., Nooren, G.J.L., Norum, B.E., Poolman, H.R., Rachek, I., Simani, M.C., Six, E., Szczerba, D., de Vries, H., Wang, K., and Zhou, Z.L.

Subjects
POLARIZED ELECTRONS, INTERNAL TARGET, RADIUS, SPECTROMETER, STORAGE-RING, NIKHEF, QUASI-ELASTIC SCATTERING, HE-3
Abstract

We report on the first measurement of spin-correlation parameters in quasifree electron scattering from vector-polarized deuterium. Polarized electrons were injected into an electron storage ring at a beam energy of 720 MeV. A Siberian snake was employed to preserve longitudinal polarization at the interaction paint. Vector-polarized deuterium was produced by an atomic beam source and injected into an open-ended cylindrical cell, internal to the electron storage ring. The spin correlation parameter A(ed)(V) was measured for the reaction 2 (H) over right arrow((e) over right arrow, e'' n)p at a four-momentum transfer squared of 0.21 (GeV/c)(2) from which a value for the charge form factor of the neutron was extracted.

Published
1999

39. Measurement of the neutral weak form-factors of the proton

Author

Aniol, K.A., Armstrong, D.S., Baylac, M., Burtin, E., Calarco, J., Cates, G.D., Cavata, C., Chen, J.P., Chudakov, E., Dale, D., De Jager, C.W., Deur, A., Djawotho, P., Epstein, M.B., Escoffier, S., Ewell, L., Falleto, N., Finn, J.M., Fissum, K., Fleck, A., Frois, B., Gao, J., Garibaldi, F., Gasparian, A., Gerstner, G.M., Gilman, R., Glamazdin, A., Gomez, J., Gorbenko, V., Hansen, O., Hersman, F., Holmes, R., Holtrop, M., Humensky, B., Incerti, S., Jardillier, J., Jones, M.K., Jorda, J., Jutier, C., Kahl, W., Kim, D.H., Kim, M.S., Kramer, K., Kumar, K.S., Kuss, M., LeRose, J., Leuschner, M., Lhuillier, D., Liyanage, N., Lourie, R., Madey, R., Margaziotis, D.J., Marie, F., Martino, J., Mastromarino, P., McCormick, K., McIntyre, J., Meziani, Z.E., Michaels, R., Miller, G.W., Neyret, D., Perdrisat, C., Petratos, G.G., Pomatsalyuk, R., Price, J.S., Prout, D., Punjabi, V., Pussieux, T., Quéméner, G., Rutledge, G., Rutt, P.M., Saha, A., Souder, P.A., Spradlin, M., Suleiman, R., Thompson, J., Todor, L., Ulmer, P.E., Vlahovic, B., Wijesooriya, K., Wilson, R., Wojtsekhowski, B., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and HAPPEX

Subjects
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Nuclear Experiment
Abstract

We have measured the parity-violating electroweak asymmetry in the elastic scattering of polarized electrons from the proton. The kinematic point (theta_lab = 12.3 degrees and Q^2=0.48 (GeV/c)^2) is chosen to provide sensitivity, at a level that is of theoretical interest, to the strange electric form factor G_E^s. The result, A=-14.5 +- 2.2 ppm, is consistent with the electroweak Standard Model and no additional contributions from strange quarks. In particular, the measurement implies G_E^s + 0.39G_M^s = 0.023 +- 0.034 (stat) +- 0.022 (syst) +- 0.026 (delta G_E^n), where the last uncertainty arises from the estimated uncertainty in the neutron electric form factor.

Published
1999

40. Measurement of T20 in Elastic Electron-Deuteron Scattering

Author

Bouwhuis, M., Alarcon, R., Botto, T., van den Brand, J.F.J., Bulten, H.J., Dolfini, S., Ent, R., Ferro-Luzzi, M., Higinbotham, D.W., de Jager, C.W., Lang, J., de Lange, D.J.J., Papadakis, N., Passchier, I., Poolman, H.R., Six, E., Steijger, J.J.M., Vodinas, N., de Vries, H., Zhou, Z.L., and (Astro)-Particles Physics

Subjects
POLARIZED INTERNAL TARGETS, ION-EXTRACTION POLARIMETRY, FORM-FACTORS, RANGE, TENSOR POLARIZATION, Nuclear Theory, FOS: Physical sciences, nucl-ex, SDG 7 - Affordable and Clean Energy, STORAGE-RING, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

We report on a measurement of the tensor analyzing power T-20 in elastic electron-deuteron scattering in the range of four-momentum transfer from 1.8 to 3.2 fm(-1). Electrons of 704 MeV were scattered from a polarized deuterium internal target. The tensor polarization of the deuterium nuclei was determined with an ion-extraction system, allowing an absolute measurement of T-20 The data are described well by a nonrelativistic calculation that includes the effects of meson-exchange currents.

Published
1998
Full Text
View/download PDF

41. Recoil polarization measurements for neutral pion electroproduction at Q2=1(GeV/c)2 near the Δ resonance

Author

Kelly, J.J., Kelly, J.J., Gayou, O., Roche, R.E., Chai, Z., Jones, M.K., Sarty, A.J., Frullani, S., Aniol, K., Beise, E.J., Benmokhtar, F., Bertozzi, W., Boeglin, W.U., Botto, T., Brash, E.J., Breuer, H., Brown, E., Burtin, E., Calarco, J.R., Cavata, C., Chang, C.C., Chant, N.S., Chen, J.-P., Coman, M., Crovelli, D., De Leo, R., Dieterich, S., Escoffier, S., Fissum, K.G., Garde, V., Garibaldi, F., Georgakopoulos, S., Gilad, S., Gilman, R., Glashausser, C., Hansen, J.-O., Higinbotham, D.W., Hotta, A., Huber, G.M., Ibrahim, H., Iodice, M., de Jager, C.W., Jiang, X., Kimenko, A., Kozlov, A., Kumbartzki, G., Kuss, M., Lagamba, L., Laveissiere, G., LeRose, J.J., Lindgren, R.A., Liyange, N., Lolos, G.J., Lourie, R.W., Margaziotis, D.J., Marie, F., Markowitz, P., McAleer, S., Meekins, D., Michaels, R., Milbrath, B.D., Mitchell, J., Nappa, J., Neyret, D., Perdrisat, C.F., Potokar, M., Punjabi, V.A., Pussieux, T., Ransome, R.D., Roos, P.G., Rvachev, M., Saha, A., Sirca, S., Suleiman, R., Strauch, S., Templon, J.A., Todor, L., Ulmer, P.E., Urciuoli, G.M., Weinstein, L.B., Wijsooriya, K., Wojtsekhowski, B., Zheng, X., Zhu, L., Jefferson Laboratory E91011 and Hall A Collaborations, Kelly, J.J., Kelly, J.J., Gayou, O., Roche, R.E., Chai, Z., Jones, M.K., Sarty, A.J., Frullani, S., Aniol, K., Beise, E.J., Benmokhtar, F., Bertozzi, W., Boeglin, W.U., Botto, T., Brash, E.J., Breuer, H., Brown, E., Burtin, E., Calarco, J.R., Cavata, C., Chang, C.C., Chant, N.S., Chen, J.-P., Coman, M., Crovelli, D., De Leo, R., Dieterich, S., Escoffier, S., Fissum, K.G., Garde, V., Garibaldi, F., Georgakopoulos, S., Gilad, S., Gilman, R., Glashausser, C., Hansen, J.-O., Higinbotham, D.W., Hotta, A., Huber, G.M., Ibrahim, H., Iodice, M., de Jager, C.W., Jiang, X., Kimenko, A., Kozlov, A., Kumbartzki, G., Kuss, M., Lagamba, L., Laveissiere, G., LeRose, J.J., Lindgren, R.A., Liyange, N., Lolos, G.J., Lourie, R.W., Margaziotis, D.J., Marie, F., Markowitz, P., McAleer, S., Meekins, D., Michaels, R., Milbrath, B.D., Mitchell, J., Nappa, J., Neyret, D., Perdrisat, C.F., Potokar, M., Punjabi, V.A., Pussieux, T., Ransome, R.D., Roos, P.G., Rvachev, M., Saha, A., Sirca, S., Suleiman, R., Strauch, S., Templon, J.A., Todor, L., Ulmer, P.E., Urciuoli, G.M., Weinstein, L.B., Wijsooriya, K., Wojtsekhowski, B., Zheng, X., Zhu, L., and Jefferson Laboratory E91011 and Hall A Collaborations

Abstract

We measured angular distributions of differential cross section, beam analyzing power, and recoil polarization for neutral pion electroproduction at Q2=1.0 (GeV/c)2 in 10 bins of 1.17⩽W⩽1.35 GeV across the Δ resonance. A total of 16 independent response functions were extracted, of which 12 were observed for the first time. Comparisons with recent model calculations show that response functions governed by real parts of interference products are determined relatively well near the physical mass, W=MΔ≈1.232 GeV, but the variation among models is large for response functions governed by imaginary parts, and for both types of response functions, the variation increases rapidly with W>MΔ. We performed a multipole analysis that adjusts suitable subsets of ℓπ⩽2 amplitudes with higher partial waves constrained by baseline models. This analysis provides both real and imaginary parts. The fitted multipole amplitudes are nearly model independent—there is very little sensitivity to the choice of baseline model or truncation scheme. By contrast, truncation errors in the traditional Legendre analysis of N→Δ quadrupole ratios are not negligible. Parabolic fits to the W dependence around MΔ for the multiple analysis gives values for Re(S1+/M1+)=(-6.61±0.18)% and Re(E1+/M1+)=(-2.87±0.19)% for the pπ0 channel at W=1.232 GeV and Q2=1.0 (GeV/c)2 that are distinctly larger than those from the Legendre analysis of the same data. Similarly, the multipole analysis gives Re(S0+/M1+)=(+7.1±0.8)% at W=1.232 GeV, consistent with recent models, while the traditional Legendre analysis gives the opposite sign because its truncation errors are quite severe.

Published
2007

42. Quasielastic electron scattering from polarized He-3

Author

Bulten, H.J., Alarcon, R., Bauer, T., Boersma, D., Botto, T., van den Brand, J.F.J., van Buuren, L.D., Ent, R., Ferro Luzzi, M.M.E., Geurts, D.G., Harvey, M., Heimberg, P., Higinbotham, D.W., de Jager, C.W., Norum, B., Passchier, I., Poolman, H.R., van den Putte, M., Six, E., Steijger, J.J.M., Szczerba, D., de Vries, H., (Astro)-Particles Physics, and Atoms, Molecules, Lasers

Published
1997

43. Polarized Electrons in the AmPS Storage Ring

Author

Luijckx, G., van Amersfoort, P.W., Boer Rookhuizen, H., van den Brand, J.F.J., Kroes, F.B., de Jager, C.W., Kuijer, L.H., van der Laan, J.B., Maas, R., Noomen, J.G., Passchier, I., van Putte, M.J.J., Koop, I., Militsyn, B., Terekhov, A.S., Comyn, M., Craddock, M.K., Reiser, M., Thomson, J., and (Astro)-Particles Physics

Published
1997

44. Measurement of Tensor Analyzing Powers for Elastic Electron Scattering from a Polarized 2H Target Internal to a Storage Ring

Author

Ferro Luzzi, M.M.E., Bouwhuis, M., Passchier, E., Zhou, Z.L., Alarcon, R., Anghinolfi, M., van Bommel, R., Botto, T., van den Brand, J.F.J., Buchholz, M., Bulten, H.J., Choi, S., Comfort, J., Dolfini, S., Ent, R., Gaulard, C., Higinbotham, D.W., de Jager, C.W., van Klaveren, E.P., Konstantinov, E., Lang, J., de Lange, D.J., Miller, M.A., Nikolenko, D., Nooren, G.J., Papadakis, N., Passchier, I., Poolman, H.R., Popov, S.G., Rachek, I., Ripani, M., Six, E., Steijger, J.J.M., Taiuti, M., Unal, O., Vodanis, N., de Vries, H., and (Astro)-Particles Physics

Published
1996
Full Text
View/download PDF

46. Recoil Polarization for Δ Excitation in Pion Electroproduction

Author

Kelly, J.J., Kelly, J.J., Roche, R.E., Chai, Z., Jones, M.K., Gayou, O., Sarty, A.J., Frullani, S., Aniol, K., Beise, E.J., Benmokhtar, F., Bertozzi, W., Boeglin, W.U., Botto, T., Brash, E.J., Breuer, H., Brown, E., Burtin, E., Calarco, J.R., Cavata, C., Chang, C.C., Chant, N.S., Chen, J.-P., Coman, M., Crovelli, D., De Leo, R., Dieterich, S., Escoffier, S., Fissum, K.G., Garde, V., Garibaldi, F., Georgakopoulus, S., Gilad, S., Gilman, R., Glashausser, C., Hansen, J.-O., Higinbotham, D.W., Hotta, A., Huber, G.M., Ibrahim, H., Iodice, M., de Jager, C.W., Jiang, X., Klimenko, A., Kozlov, A., Kumbartzki, G., Kuss, M., Lagamba, L., Laveissiere, G., LeRose, J.J., Lindgren, R.A., Liyanage, N., Lolos, G.J., Lourie, R.W., Margaziotis, D.J., Marie, F., Markowitz, P., McAleer, S., Meekins, D., Michaels, R., Milbrath, B.D., Mitchell, J., Nappa, J., Neyret, D., Perdrisat, C.F., Potokar, M., Punjabi, V.A., Pussieux, T., Ransome, R.D., Roos, P.G., Rvachev, M., Saha, A., Sirca, S., Suleiman, R., Strauch, S., Templon, J.A., Todor, L., Ulmer, P.E., Urciuoli, G.M., Weinstein, L.B., Wijesooriya, K., Wojtsekhowski, B., Zheng, X., Zhu, L., Jefferson Laboratory E91011 and Hall A Collaborations, Kelly, J.J., Kelly, J.J., Roche, R.E., Chai, Z., Jones, M.K., Gayou, O., Sarty, A.J., Frullani, S., Aniol, K., Beise, E.J., Benmokhtar, F., Bertozzi, W., Boeglin, W.U., Botto, T., Brash, E.J., Breuer, H., Brown, E., Burtin, E., Calarco, J.R., Cavata, C., Chang, C.C., Chant, N.S., Chen, J.-P., Coman, M., Crovelli, D., De Leo, R., Dieterich, S., Escoffier, S., Fissum, K.G., Garde, V., Garibaldi, F., Georgakopoulus, S., Gilad, S., Gilman, R., Glashausser, C., Hansen, J.-O., Higinbotham, D.W., Hotta, A., Huber, G.M., Ibrahim, H., Iodice, M., de Jager, C.W., Jiang, X., Klimenko, A., Kozlov, A., Kumbartzki, G., Kuss, M., Lagamba, L., Laveissiere, G., LeRose, J.J., Lindgren, R.A., Liyanage, N., Lolos, G.J., Lourie, R.W., Margaziotis, D.J., Marie, F., Markowitz, P., McAleer, S., Meekins, D., Michaels, R., Milbrath, B.D., Mitchell, J., Nappa, J., Neyret, D., Perdrisat, C.F., Potokar, M., Punjabi, V.A., Pussieux, T., Ransome, R.D., Roos, P.G., Rvachev, M., Saha, A., Sirca, S., Suleiman, R., Strauch, S., Templon, J.A., Todor, L., Ulmer, P.E., Urciuoli, G.M., Weinstein, L.B., Wijesooriya, K., Wojtsekhowski, B., Zheng, X., Zhu, L., and Jefferson Laboratory E91011 and Hall A Collaborations

Abstract

We measured angular distributions of recoil-polarization response functions for neutral pion electroproduction for W=1.23 GeV at Q2=1.0 (GeV/c)2, obtaining 14 separated response functions plus 2 Rosenbluth combinations; of these, 12 have been observed for the first time. Dynamical models do not describe quantities governed by imaginary parts of interference products well, indicating the need for adjusting magnitudes and phases for nonresonant amplitudes. We performed a nearly model-independent multipole analysis and obtained values for Re (S1+/M1+)=-(6.84±0.15)% and Re (E1+/M1+)=-(2.91±0.19)% that are distinctly different from those from the traditional Legendre analysis based upon M1+ dominance and ℓπ≤1 truncation.

Published
2005

47. Cross section measurements of charged pion photoproduction in hydrogen and deuterium from 1.1 to 5.5 GeV

Author

Zhu, L.Y., Zhu, L.Y., Arrington, J., Averett, T., Beise, E., Calarco, J., Chang, T., Chen, J.P., Chudakov, E., Coman, M., Clasie, B., Crawford, C., Dieterich, S., Dohrmann, F., Dutta, D., Fissum, K., Frullani, S., Gao, H., Gilman, R., Glashausser, C., Gomez, J., Hafidi, K., Hansen, O., Higinbotham, D.W., Holt, R.J., de Jager, C.W., Jiang, X., Kinney, E., Kramer, K., Kumbartzki, G., LeRose, J., Liyanage, N., Mack, D., Markowitz, P., McCormick, K., Meekins, D., Meziani, Z.-E., Michaels, R., Mitchell, J., Nanda, S., Potterveld, D., Ransome, R., Reimer, P.E., Reitz, B., Saha, A., Schulte, E.C., Seely, J., Sirca, S., Strauch, S., Sulkosky, V., Vlahovic, B., Weinstein, L.B., Wijesooriya, K., Williamson, C., Wojtsekhowski, B., Xiang, H., Xiong, F., Xu, W., Zeng, J., Zheng, X., Jefferson Lab Hall A Collaboration, Jefferson Lab E94-104 Collaboration, Zhu, L.Y., Zhu, L.Y., Arrington, J., Averett, T., Beise, E., Calarco, J., Chang, T., Chen, J.P., Chudakov, E., Coman, M., Clasie, B., Crawford, C., Dieterich, S., Dohrmann, F., Dutta, D., Fissum, K., Frullani, S., Gao, H., Gilman, R., Glashausser, C., Gomez, J., Hafidi, K., Hansen, O., Higinbotham, D.W., Holt, R.J., de Jager, C.W., Jiang, X., Kinney, E., Kramer, K., Kumbartzki, G., LeRose, J., Liyanage, N., Mack, D., Markowitz, P., McCormick, K., Meekins, D., Meziani, Z.-E., Michaels, R., Mitchell, J., Nanda, S., Potterveld, D., Ransome, R., Reimer, P.E., Reitz, B., Saha, A., Schulte, E.C., Seely, J., Sirca, S., Strauch, S., Sulkosky, V., Vlahovic, B., Weinstein, L.B., Wijesooriya, K., Williamson, C., Wojtsekhowski, B., Xiang, H., Xiong, F., Xu, W., Zeng, J., Zheng, X., Jefferson Lab Hall A Collaboration, and Jefferson Lab E94-104 Collaboration

Abstract

The differential cross sections for the γn→π-p and the γp→π+n processes were measured at Jefferson Lab. The photon energies ranged from 1.1 to 5.5 GeV, corresponding to center-of-mass energies from 1.7 to 3.4 GeV. The pion center-of-mass angles varied from 50° to 110°. The π- and π+ photoproduction data both exhibit a global scaling behavior at high energies and high transverse momenta, consistent with the constituent counting rule prediction and the existing π+ data. The data suggest possible substructure of the scaling behavior, which might be oscillations around the scaling value. The data show an enhancement in the scaled cross section at center-of-mass energy near 2.2 GeV. The differential cross section ratios [dσ/dt(γn→π-p)/dσ/dt(γp→π+n)] at high energies and high transverse momenta can be described by calculations based on one-hard-gluon-exchange diagrams.

Published
2005

48. Electron scattering from polarized deuterium at VEPP-3

Author

Jones, C.E., Holt, R.J., Kowalczyk, R., Poelker, M., Potterveld, D.H., Young, L., Mishnev, S.I., Nikolenko, D.M., Popov, S.G., Rachek, I.A., Sukhonov, A., Toporkov, D.K., Tsentalovich, E.K., Volosov, A., Kinney, E.R., Coulter, K.P., de Jager, C.W., Retzlaff, G., Theunissen, J., de Vries, H.A., Gilman, R., Nelyubin, V.V., Stibunov, V.N., Seestrom, S.J., and Other Research IHEF (IoP, FNWI)

Subjects
Physics, Elastic scattering, Nuclear physics, Electron storage, Deuterium, Form factor (quantum field theory), High Energy Physics::Experiment, Tensor, Atomic physics, Ring (chemistry), Electron scattering
Abstract

The status, results, and future plans for the experiment measuring the tensor analyzing power of the deuteron using a tensor‐polarized internal target at the VEPP‐3 electron storage ring in Novosibirsk are presented.

Published
1995

Catalog

Books, media, physical & digital resources
See catalog results