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1. Virtual Compton Scattering and the Generalized Polarizabilities of the Proton at Q^2=0.92 and 1.76 GeV^2

Author

Fonvieille, H., 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, V., 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., deJager, 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., 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, 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., 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., Quemener, 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, G., 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 der Meer, R. L. J., Van De Vyver, R., 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., and Zhou, Z. -L.

Subjects
Nuclear Experiment, High Energy Physics - Experiment
Abstract

Virtual Compton Scattering (VCS) on the proton has been studied at Jefferson Lab using the exclusive photon electroproduction reaction (e p --> e p gamma). This paper gives a detailed account of the analysis which has led to the determination of the structure functions P_LL-P_TT/epsilon and P_LT, and the electric and magnetic generalized polarizabilities (GPs) alpha_E(Q^2) and beta_M(Q^2) at values of the four-momentum transfer squared Q^2= 0.92 and 1.76 GeV^2. These data, together with the results of VCS experiments at lower momenta, help building a coherent picture of the electric and magnetic GPs of the proton over the full measured Q^2-range, and point to their non-trivial behavior., Comment: version 2: modified according to PRC Editor's and Referee's recommendations. Archival paper for the E93-050 experiment at JLab Hall A. 28 pages, 23 figures, 5 cross-section tables. To be submitted to Phys.Rev.C

Published
2012
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2. 3He Spin-Dependent Cross Sections and Sum Rules

Author

E94010 Collaboration, Slifer, K., Amarian, M., Auerbach, L., Averett, T., Berthot, J., Bertin, P., Bertozzi, B., Black, T., Brash, E., Brown, D., Burtin, E., Calarco, J., Cates, G., Chai, Z., Chen, J. -P., Choi, Seonho, Chudakov, E., Atti, C. Ciofi degli, Cisbani, E., de Jager, C. W., Deur, A., DiSalvo, R., Dieterich, S., Djawotho, P., Finn, M., Fissum, K., Fonvieille, H., Frullani, S., Gao, H., Gao, J., Garibaldi, F., Gasparian, A., Gilad, S., Gilman, R., Glamazdin, A., Glashausser, C., Glockle, W., Golak, J., Goldberg, E., Gomez, J., Gorbenko, V., Hansen, J. -O., Hersman, B., Holmes, R., Huber, G. M., Hughes, E., Humensky, B., Incerti, S., Iodice, M., Jensen, S., Jiang, X., Jones, C., Jones, G., Jones, M., Jutier, C., Kamada, H., Ketikyan, A., Kominis, I., Korsch, W., Kramer, K., Kumar, K., Kumbartzki, G., Kuss, M., Lakuriqi, E., Laveissiere, G., Lerose, J. J., Liang, M., Liyanage, N., Lolos, G., Malov, S., Marroncle, J., McCormick, K., McKeown, R. D., Meziani, Z. -E., Michaels, R., Mitchell, J., Nogga, A., Pace, E., Papandreou, Z., Pavlin, T., Petratos, G. G., Pripstein, D., Prout, D., Ransome, R., Roblin, Y., Rowntree, D., Rvachev, M., Sabatie, F., Saha, A., Salme, G., Scopetta, S., Skibinski, R., Souder, P., Saito, T., Strauch, S., Suleiman, R., Takahashi, K., Teijiro, S., Todor, L., Tsubota, H., Ueno, H., Urciuoli, G., Van der Meer, R., Vernin, P., Voskanian, H., Witala, H., Wojtsekhowski, B., Xiong, F., Xu, W., Yang, J. -C., Zhang, B., and Zolnierczuk, P.

Subjects
Nuclear Experiment
Abstract

We present a measurement of the spin-dependent cross sections for the \vec{^3He}(\vec{e},e')X} reaction in the quasielastic and resonance regions at four-momentum transfer 0.1 < Q^2< 0.9 GeV^2. The spin-structure functions have been extracted and used to evaluate the nuclear Burkhardt--Cottingham and extended GDH sum rules for the first time. Impulse approximation and exact three-body Faddeev calculations are also compared to the data in the quasielastic region., Comment: Final version

Published
2008
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3. 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.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

A lead-glass hodoscope calorimeter that was constructed for use in the Jefferson Lab Real Compton Scattering experiment is described. The detector provides a measurement of the coordinates and the energy of scattered photons in the GeV energy range with resolutions of 5 mm and 6%/\sqrt(E{\gamma} [GeV]). Features of both the detector design and its performance in the high luminosity environment during the experiment are presented., Comment: text updated according to published version

Published
2007

4. 3He Spin-Dependent Cross Sections and Sum Rules

Author

Temple University, Yarevan Physics Institute, Thomas Jefferson National Accelerator Facility, LPC IN2P3/CNRS, Universite´ Blaise Pascal, Massachusetts Institute of Technology, University of Regina, Kharkov Institute of Physics and Technology, University of New Hampshire, California Institute of Technology, Kent State University, Rutgers, The State University of New Jersey, Old Dominion University, INFN, Sezione di Perugia, INFN, Sezione Roma I, M. Smoluchowski Institute of Physics, Jagiellonian University, Syracuse University, Tohoku University, INFN, Sezione Sanita, CEA Saclay,9INFN, Sezione Tor Vergata, Yerevan Physics Institute, Chungnam National University, Princeton University, University of Kentucky, The College of William and Mary, Hampton University, Institut fu¨r Theoretische Physik II, Ruhr Universita¨t Bochum, Temple UniversityINFNSezione di Perugia, INFN, Sezione Sanita1California Institute of Technology, Department of Physics, Faculty of Engineering, Kyushu Institute of Technology, University of Massachusetts-Amherst, CEA Saclay, Institut fu¨r Kernphysik, INFN, Sezione Tor Vergata, Slifer, K, Amarian, M, Auerbach, L, Averett, T, Berthot, J, Bertin, P, Bertozzi, B, Black, T, Brash, E, Brown, D, Burtin, R, Nogga, A, Pace, E, Papandreou, Z, Pavlin, T, Petratos, G.G, Pripstein, D, Prout, D, Ransome, R, Roblin, Y, Rowntree, D, Saha, A, Rvachev, M, Sabatie´, F, Salme´, G, Scopetta, S, Skibinski, R, Souder, P, Saito, T, Strauch, S, Suleiman, R, Takahashi, K, Teijiro, S, Ueno, H, Todor, L, Tsubota, H, Urciuoli, G, Van, der Meer R, Vernin, P, Voskanian, H, Witala, H, Wojtsekhowski, B, Xiong, F, Xu, W, Yang, J.-C, Calarco, J, Zhang, B, Zolnierczuk, P, Cates, G, Chai, Z, Chen, J.-P, Choi, Seonho, Chudakov, E, Ciofi, degli Atti C, Cisbani, E, deJager, C.W, Deur, A, DiSalvo, R, Dietorich, S, Djawotho, P, Finn, M, Fissum, K, Fonvieille, H, Frullani, S, Gao, H, Gao, J, Garibaldi, F, Gasparian, A, Gilad, S, Gilman, R, Glamadin, A, Glashausser, C, Glo¨ckle, W, Golak, J, Goldberg, E, Gomez, J, Gorbenko, V, Hansen, J.-O, Hersman, B, Holmes, R, Huber, G.M, Hughes, E, Humensky, B, Incerti, S, Iodice, M, Jensen, S, Jiang, X, Jones, C, Jones, G, Jones, M, Jutier, C, Kamada, H, Ketikyan, A, Kominis, I, Korsch, W, Kramer, K, Kumae, K, Kumbartzki, G, Kuss, M, Lakuriqi, E, Laveissier, G, Lerose, J.J, Liang, M, Liyanage, N, Lolos, G, Malov, S, Marroncle, J, McCormick, K, McKeown, R.D, Meziani, Z.-E, Michaels, R, Mitchell, J, Temple University, Yarevan Physics Institute, Thomas Jefferson National Accelerator Facility, LPC IN2P3/CNRS, Universite´ Blaise Pascal, Massachusetts Institute of Technology, University of Regina, Kharkov Institute of Physics and Technology, University of New Hampshire, California Institute of Technology, Kent State University, Rutgers, The State University of New Jersey, Old Dominion University, INFN, Sezione di Perugia, INFN, Sezione Roma I, M. Smoluchowski Institute of Physics, Jagiellonian University, Syracuse University, Tohoku University, INFN, Sezione Sanita, CEA Saclay,9INFN, Sezione Tor Vergata, Yerevan Physics Institute, Chungnam National University, Princeton University, University of Kentucky, The College of William and Mary, Hampton University, Institut fu¨r Theoretische Physik II, Ruhr Universita¨t Bochum, Temple UniversityINFNSezione di Perugia, INFN, Sezione Sanita1California Institute of Technology, Department of Physics, Faculty of Engineering, Kyushu Institute of Technology, University of Massachusetts-Amherst, CEA Saclay, Institut fu¨r Kernphysik, INFN, Sezione Tor Vergata, Slifer, K, Amarian, M, Auerbach, L, Averett, T, Berthot, J, Bertin, P, Bertozzi, B, Black, T, Brash, E, Brown, D, Burtin, R, Nogga, A, Pace, E, Papandreou, Z, Pavlin, T, Petratos, G.G, Pripstein, D, Prout, D, Ransome, R, Roblin, Y, Rowntree, D, Saha, A, Rvachev, M, Sabatie´, F, Salme´, G, Scopetta, S, Skibinski, R, Souder, P, Saito, T, Strauch, S, Suleiman, R, Takahashi, K, Teijiro, S, Ueno, H, Todor, L, Tsubota, H, Urciuoli, G, Van, der Meer R, Vernin, P, Voskanian, H, Witala, H, Wojtsekhowski, B, Xiong, F, Xu, W, Yang, J.-C, Calarco, J, Zhang, B, Zolnierczuk, P, Cates, G, Chai, Z, Chen, J.-P, Choi, Seonho, Chudakov, E, Ciofi, degli Atti C, Cisbani, E, deJager, C.W, Deur, A, DiSalvo, R, Dietorich, S, Djawotho, P, Finn, M, Fissum, K, Fonvieille, H, Frullani, S, Gao, H, Gao, J, Garibaldi, F, Gasparian, A, Gilad, S, Gilman, R, Glamadin, A, Glashausser, C, Glo¨ckle, W, Golak, J, Goldberg, E, Gomez, J, Gorbenko, V, Hansen, J.-O, Hersman, B, Holmes, R, Huber, G.M, Hughes, E, Humensky, B, Incerti, S, Iodice, M, Jensen, S, Jiang, X, Jones, C, Jones, G, Jones, M, Jutier, C, Kamada, H, Ketikyan, A, Kominis, I, Korsch, W, Kramer, K, Kumae, K, Kumbartzki, G, Kuss, M, Lakuriqi, E, Laveissier, G, Lerose, J.J, Liang, M, Liyanage, N, Lolos, G, Malov, S, Marroncle, J, McCormick, K, McKeown, R.D, Meziani, Z.-E, Michaels, R, and Mitchell, J

Abstract

type:Journal Article, We present a measurement of the spin-dependent cross sections for the (3)(He) over right arrow((e) over right arrow ,e')X reaction in the quasielastic and resonance regions at a four-momentum transfer 0.1 <= Q(2)<= 0.9 GeV2. The spin-structure functions have been extracted and used to evaluate the nuclear Burkhardt-Cottingham and extended Gerasimov-Drell-Hearn sum rules for the first time. The data are also compared to an impulse approximation calculation and an exact three-body Faddeev calculation in the quasielastic region., source:https://doi.org/10.1103/PhysRevLett.101.022303, source:http://www.aps.org

Published
2017

5. Measurements of the Deuteron Elastic Structure FunctionA(Q2)for0.7≤Q2≤6.0(GeV/c)2at Jefferson Laboratory

Author

Paul Souder, Z. L. Zhou, E. Burtin, R. I. Pomatsalyuk, D. S. Dale, N. d'Hose, Ch. Hyde-Wright, J. O. Hansen, T. Saito, H. Breuer, K. Arundell, Seigo Kato, W. M. Zhang, C. R. Howell, J. R. Calarco, S. Nanda, L. Auerbach, K. Wijesooriya, Kevin Fissum, G. M. Huber, G. Rutledge, R. W. Lourie, J. Domingo, Y. Roblin, H. Fonvieille, L. Bimbot, T. P. Smith, S. Frullani, E. Chudakov, P. E. Ulmer, L. A. Ewell, Nilanga Liyanage, Pierre Bertin, Mauro Iodice, S. Mehrabyan, G. W. Miller, S. Malov, P. Vernin, Bogdan Wojtsekhowski, Larry Weinstein, L. C. Alexa, R. Madey, W. Kahl, R. A. Lindgren, Richard Wilson, H. Voskanyan, Branislav Vlahovic, Charles Glashausser, C. Jutier, J. J. LeRose, M. Holtrop, A. Saha, D. Neyret, A. Gasparian, R. L.J. van der Meer, T. Terasawa, Vincent Breton, R. Suleiman, E. Cisbani, V. Gorbenko, G. M. Urciuoli, M. Liang, G. Quéméner, S. Platchkov, L. Cardman, D. J. Margaziotis, David L. Prout, C. Cavata, K. Soldi, A. Serdarevic, K. Kino, Z. Papandreou, A. Leone, S. Jaminion, F. T. Baker, P. M. Rutt, A. J. Sarty, J. Gomez, D. Rowntree, William Bertozzi, Jing Zhao, Ronald Ransome, James J. Kelly, J. Jardillier, J. M. Finn, T. Pussieux, Pete Markowitz, R. Michaels, J. Gao, D. M. Manley, H. Ueno, Jian-Ping Chen, A. Ketikyan, G. Lavessiere, D. G. Zainea, V. A. Punjabi, E. J. Brash, J. W. Watson, A. T. Katramatou, Roberto Perrino, C. C. Chang, R. De Leo, S. Kerhoas, K. S. Kumar, A. V. Glamazdin, B. Diederich, Shalev Gilad, M. Khayat, L. Van Hoorebeke, O. Ravel, Justin I. McIntyre, Pavel Sorokin, L. Todor, J. A. Templon, R. Holmes, C. W. de Jager, W. U. Boeglin, K. A. Aniol, G. G. Petratos, Z. E. Meziani, B. D. Anderson, G. J. Lolos, M. B. Epstein, J. Berthot, A. Deur, J. Martino, C. F. Perdrisat, E. A.J.M. Offermann, Kazushige Maeda, Haiyan Gao, J. Marroncle, Laird Kramer, J. Y. Mougey, C. J. Martoff, F. Garibaldi, G. Kumbartzki, Ronald Gilman, Hiroaki Tsubota, K. McCormick, B. Frois, N Degrande, M. K. Jones, and M. Kuss

Subjects
Quantum chromodynamics, Quark, Physics, Particle physics, 010308 nuclear & particles physics, Scattering, High Energy Physics::Lattice, Nuclear Theory, Quark model, General Physics and Astronomy, Elementary particle, 7. Clean energy, 01 natural sciences, Gluon, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Quantum field theory, Nuclear Experiment, 010306 general physics, Boson
Abstract

The deuteron elastic structure function A(Q2) has been extracted in the range 0.7≤Q2≤6.0(GeV/c)2 from cross section measurements of elastic electron-deuteron scattering in coincidence using the Hall A Facility of Jefferson Laboratory. The data are compared to theoretical models, based on the impulse approximation with the inclusion of meson-exchange currents, and to predictions of quark dimensional scaling and perturbative quantum chromodynamics.

Published
1999
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6. Virtual Compton scattering and the generalized polarizabilities of the proton atQ2=0.92and 1.76 GeV2

Author

L. B. Auerbach, C. Cavata, D. J. Margaziotis, K. Kino, A. J. Sarty, Seigo Kato, J. A. Templon, B. Frois, Ronald Ransome, D. Rowntree, R. W. Lourie, Christophe Furget, P. Grenier, M. K. Jones, D. S. Dale, G. W. Miller, H. Voskanyan, C. Jutier, S. Frullani, Z. L. Zhou, C. R. Howell, W. Kahl, M. Khayat, A. T. Katramatou, M. Kuss, J. W. Watson, K. Wijesooriya, W. M. Zhang, J. Jardillier, G.I. Smirnov, David L. Prout, G. Laveissière, A. Deur, G. E. Dodge, J. R. Calarco, G. Fournier, N. Degrande, R. A. Lindgren, J. J. LeRose, R. I. Pomatsalyuk, E. J. Brash, W. U. Boeglin, V. Gorbenko, R. Suleiman, F. T. Baker, S. Platchkov, G. M. Huber, F. Garibaldi, Ronald Gilman, K. McCormick, G. Rutledge, T. Saito, Richard Madey, G. G. Petratos, Z. E. Meziani, K. Arundell, Marc Vanderhaeghen, J. Martino, James J. Kelly, S. Kox, J. Marroncle, L. Cardman, C. E. Hyde, Raphael Noel Tieulent, Z. Papandreou, Pierre A.M. Guichon, F. Merchez, Bogdan Wojtsekhowski, D. Marchand, E. Tomasi-Gustaffson, M. Liang, P. M. Rutt, F. Renard, Shalev Gilad, S. Mehrabyan, G. Quéméner, V. A. Punjabi, D. M. Manley, C. W. de Jager, R. L.J. van der Meer, K. A. Aniol, Nilanga Liyanage, A. Gasparian, B. D. Anderson, G. J. Lolos, M. B. Epstein, Richard Wilson, Branislav Vlahovic, L. C. Alexa, A. Ketikyan, P. E. Ulmer, A. V. Glamazdin, E. A.J.M. Offermann, Jing Zhao, P. Y. Bertin, L. Van Hoorebeke, T. Pussieux, Mauro Iodice, Larry Weinstein, Laird Kramer, T. Terasawa, Vincent Breton, J. Gao, C. F. Perdrisat, C. Marchand, D. Neyret, William Bertozzi, R. Michaels, R. Holmes, H. Fonvieille, D. G. Zainea, Charles Glashausser, C. C. Chang, K. S. Kumar, J. Domingo, Pavel Sorokin, Haiyan Gao, Pete Markowitz, L. Bimbot, R. Di Salvo, J. M. Finn, J. S. Real, Justin I. McIntyre, S. Jaminion, G. Kumbartzki, E. Chudakov, Barbara Pasquini, Latifa Elouadrhiri, N. d'Hose, Roberto Perrino, R. De Leo, M. Baylac, J. O. Hansen, J. P. Chen, R. Van de Vyver, G. M. Urciuoli, J. Berthot, H. Breuer, Kevin Fissum, L. A. Ewell, G. Audit, Kazushige Maeda, J. Mougey, O. Ravel, S. Malov, E. Burtin, M. Holtrop, J. Gomez, Thomas E. Smith, Paul Souder, H. Ueno, S. K. Nanda, Hiroaki Tsubota, S. Kerhoas, L. Todor, A. Leone, A. Saha, E. Voutier, K. Soldi, A. Serdarevic, Sebastien Incerti, Y. Roblin, P. Vernin, and E. Cisbani

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Photon, Chiral perturbation theory, Proton, 010308 nuclear & particles physics, Structure function, Compton scattering, 01 natural sciences, Nuclear physics, Amplitude, Dispersion relation, 0103 physical sciences, Beta (velocity), 010306 general physics
Abstract

Virtual Compton Scattering (VCS) on the proton has been studied at Jefferson Lab using the exclusive photon electroproduction reaction (e p --> e p gamma). This paper gives a detailed account of the analysis which has led to the determination of the structure functions P{sub LL}-P{sub TT}/epsilon and P{sub LT}, and the electric and magnetic generalized polarizabilities (GPs) alpha{sub E}(Q{sup 2}) and beta{sub M}(Q{sup 2}) at values of the four-momentum transfer squared Q{sup 2} = 0.92 and 1.76 GeV{sup 2}. These data, together with the results of VCS experiments at lower momenta, help building a coherent picture of the electric and magnetic GPs of the proton over the full measured Q{sup 2}-range, and point to their non-trivial behavior.

Published
2012
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7. Virtual Compton scattering and the generalized polarizabilities of the proton at Q²=0.92 and 1.76 GeV²

Author

Fonvieille, H, Laveissiere, G, Degrande, N, Jaminion, S, Jutier, C, Todor, L, Di Salvo, R, Van Hoorebeke, Luc, Alexa, LC, Anderson, BD, Aniol, KA, Arundell, K, Audit, G, Auerbach, L, Baker, FT, Baylac, M, Berthot, J, Bertin, PY, Bertozzi, W, Bimbot, L, Boeglin, WU, Brash, EJ, Breton, V, Breuer, H, Burtin, E, Calarco, JR, Cardman, LS, Cavata, C, Chang, CC, Chen, JP, Chudakov, E, Cisbani, E, Dale, DS, de Jager, CW, De Leo, R, Deur, A, d'Hose, N, Dodge, GE, Domingo, JJ, Elouadrhiri, L, Epstein, MB, Ewell, LA, Finn, JM, Fissum, KG, 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, PAM, Hansen, JO, Holmes, R, Holtrop, M, Howell, C, Huber, GM, Hyde, CE, Incerti, S, Iodice, M, Jardillier, J, Jones, MK, Kahl, W, Kato, S, Katramatou, AT, Kelly, JJ, Kerhoas, S, Ketikyan, A, Khayat, M, Kino, K, Kox, S, Kramer, LH, Kumar, KS, Kumbartzki, G, Kuss, M, Leone, A, LeRose, JJ, Liang, M, Lindgren, RA, Liyanage, N, Lolos, GJ, Lourie, RW, Madey, R, Maeda, K, Malov, S, Manley, DM, Marchand, C, Marchand, D, Margaziotis, DJ, Markowitz, P, Marroncle, J, Martino, J, McCormick, K, McIntyre, J, Mehrabyan, S, Merchez, F, Meziani, ZE, Michaels, R, Miller, GW, Mougey, JY, Nanda, SK, Neyret, D, Offermann, EAJM, Papandreou, Z, Pasquini, B, Perdrisat, CF, Perrino, R, Petratos, GG, Platchkov, S, Pomatsalyuk, R, Prout, DL, Punjabi, VA, Pussieux, T, Quemener, G, Ransome, RD, Ravel, O, Real, JS, Renard, F, Roblin, Y, Rowntree, D, Rutledge, G, Rutt, PM, Saha, A, Saito, T, Sarty, AJ, Serdarevic, A, Smith, T, Smirnov, G, Soldi, K, Sorokin, P, Souder, PA, Suleiman, R, Templon, JA, Terasawa, T, Tieulent, R, Tomasi-Gustaffson, E, Tsubota, H, Ueno, H, Ulmer, PE, Urciuoli, GM, Vanderhaeghen, M, Van der Meer, RLJ, Van de Vyver, R, Vernin, P, Vlahovic, B, Voskanyan, H, Voutier, E, Watson, JW, Weinstein, LB, Wijesooriya, K, Wilson, R, Wojtsekhowski, BB, Zainea, DG, Zhang, WM, Zhao, J, and Zhou, ZL

Subjects
Physics and Astronomy, LINEAR SIGMA-MODEL, NUCLEON POLARIZABILITIES, AMPLITUDE, ELECTROPRODUCTION, LOW-ENERGY, Nuclear Experiment, CHIRAL PERTURBATION-THEORY, REAL, THRESHOLD
Abstract

Virtual Compton scattering (VCS) on the proton has been studied at the Jefferson Laboratory using the exclusive photon electroproduction reaction ep -> ep gamma. This paper gives a detailed account of the analysis which has led to the determination of the structure functions P-LL - P-TT/epsilon and P-LT and the electric and magnetic generalized polarizabilities (GPs) alpha(E) (Q(2)) and beta(M) (Q(2)) at values of the four-momentum transfer squared Q(2) = 0.92 and 1.76 GeV2. These data, together with the results of VCS experiments at lower momenta, help building a coherent picture of the electric and magnetic GPs of the proton over the full measured Q(2) range and point to their nontrivial behavior.

Published
2012

8. Virtual Compton Scattering and Neutral Pion Electroproduction in the Resonance Region up to the Deep Inelastic Region at Backward Angles

Author

Seigo Kato, H. Ueno, K. Wijesooriya, R. Di Salvo, L. C. Alexa, G. W. Miller, H. Voskanyan, C. Jutier, J. Jardillier, E. Voutier, J. A. Templon, G. Rutledge, B. Frois, D. G. Zainea, C. C. Chang, E. Chudakov, David L. Prout, G. Laveissière, T. Terasawa, Vincent Breton, Mauro Iodice, Bogdan Wojtsekhowski, K. S. Kumar, Latifa Elouadrhiri, J. O. Hansen, A. Gasparian, K. Arundell, Pavel Sorokin, Sebastien Incerti, Larry Weinstein, P. Grenier, R. W. Lourie, W. Kahl, J. Berthot, G. Audit, L. B. Auerbach, T. Pussieux, G. Fournier, William Bertozzi, A. Deur, P. Vernin, Pierre A.M. Guichon, Ronald Ransome, Kazushige Maeda, K. Kino, N. Degrande, Pete Markowitz, D. Rowntree, Z. Papandreou, R. L.J. van der Meer, A. T. Katramatou, T. Saito, Richard Madey, Paul Souder, P. M. Rutt, S. K. Nanda, Roberto Perrino, R. De Leo, D. S. Dale, S. Mehrabyan, S. Kerhoas, J. M. Finn, W. U. Boeglin, D. J. Margaziotis, R. I. Pomatsalyuk, A. Ketikyan, L. Todor, A. Leone, M. Baylac, S. Jaminion, Nilanga Liyanage, S. Malov, E. Burtin, M. Holtrop, Thomas E. Smith, Richard Wilson, G. E. Dodge, R. Holmes, J. Marroncle, D. Marchand, E. Tomasi-Gustaffson, S. Platchkov, J. S. Real, J. Martino, Raphael Noel Tieulent, G.I. Smirnov, J. P. Chen, R. Van de Vyver, G. M. Urciuoli, Branislav Vlahovic, R. A. Lindgren, J. J. LeRose, C. R. Howell, Justin I. McIntyre, J. R. Calarco, L. Tiator, L. Bimbot, Arijit Saha, K. Soldi, O. Ravel, Hiroaki Tsubota, A. Serdarevic, C. E. Hyde, Y. Roblin, J. Y. Mougey, G. M. Huber, F. Garibaldi, E. Cisbani, J. Gomez, V. Gorbenko, J. W. Watson, F. Renard, L. Cardman, B. D. Anderson, G. J. Lolos, M. B. Epstein, F. T. Baker, F. Merchez, P. Y. Bertin, Haiyan Gao, M. Liang, G. Quéméner, D. Neyret, N. d'Hose, S. Frullani, Charles Glashausser, M. Khayat, H. Breuer, D. M. Manley, J. Gao, L. Van Hoorebeke, G. G. Petratos, Z. E. Meziani, V. A. Punjabi, L. A. Ewell, Ronald Gilman, K. McCormick, H. Fonvieille, Z. L. Zhou, A. V. Glamazdin, S. Kox, Jing Zhao, C. F. Perdrisat, R. Michaels, C. Marchand, M. K. Jones, C. Furget, P. E. Ulmer, Kevin Fissum, M. Kuss, James J. Kelly, E. J. Brash, Laird Kramer, Shalev Gilad, C. W. de Jager, K. A. Aniol, E. A.J.M. Offermann, C. Cavata, S.S. Kamalov, G. J. Kumbartzki, A. J. Sarty, W. M. Zhang, R. Suleiman, J. Domingo, 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 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), 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
Elastic scattering, Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Scattering, Compton scattering, Resonance, FOS: Physical sciences, Inelastic scattering, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Deep inelastic scattering, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pion, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment (nucl-ex), 010306 general physics, Nucleon, Nuclear Experiment
Abstract

We have made the first measurements of the virtual Compton scattering (VCS) process via the H$(e,e'p)\gamma$ exclusive reaction in the nucleon resonance region, at backward angles. Results are presented for the $W$-dependence at fixed $Q^2=1$ GeV$^2$, and for the $Q^2$-dependence at fixed $W$ near 1.5 GeV. The VCS data show resonant structures in the first and second resonance regions. The observed $Q^2$-dependence is smooth. The measured ratio of H$(e,e'p)\gamma$ to H$(e,e'p)\pi^0$ cross sections emphasizes the different sensitivity of these two reactions to the various nucleon resonances. Finally, when compared to Real Compton Scattering (RCS) at high energy and large angles, our VCS data at the highest $W$ (1.8-1.9 GeV) show a striking $Q^2$- independence, which may suggest a transition to a perturbative scattering mechanism at the quark level., Comment: 20 pages, 8 figures. To appear in Phys.Rev.C

Published
2009
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9. 3He spin-dependent cross sections and sum rules

Author

M. Liang, E. Goldberg, W. Glöckle, A. V. Glamazdin, Z. Chai, D. S. Brown, A. Gasparian, K. Kramer, G. G. Petratos, Z. E. Meziani, Ronald Ransome, R. Skibiński, D. Rowntree, B. Humensky, Koji Takahashi, Seonho Choi, H. Fonvieille, E. W. Hughes, H. Voskanian, E. J. Brash, L. B. Auerbach, R. Michaels, I. K. Kominis, J. P. Chen, S. Malov, E. Burtin, M. Finn, G. Jones, Andreas Nogga, Hiroyuki Kamada, J. Gomez, S. Scopetta, S. Jensen, J. R. Calarco, Paul Souder, G. M. Urciuoli, Henryk Witała, Nilanga Liyanage, R. DiSalvo, D. Pripstein, M. Rvachev, C. E. Jones, Shalev Gilad, S. Strauch, C. W. de Jager, Kevin Fissum, Ronald Gilman, K. McCormick, J. C. Yang, T. Averett, Wolfgang Korsch, R. Suleiman, Bogdan Wojtsekhowski, T. Black, B. Bertozzi, R. L.J. van der Meer, S. Frullani, B. Hersman, G. M. Huber, F. Garibaldi, J. J. LeRose, D. Prout, P. A. Zolnierczuk, R. Holmes, Z. Papandreou, F. Sabatié, X. Jiang, V. Gorbenko, M. K. Jones, Mauro Iodice, A. Saha, A. Ketikyan, S. Teijiro, G. Salme, Charles Glashausser, T. Saito, Haiyan Gao, M. Amarian, C. Jutier, J. Berthot, Y. Roblin, T. Pavlin, Hiroshi Ueno, Jiansong Gao, G. Laveissière, M. Kuss, K. S. Kumar, Gordon D. Cates, E. Lakuriqi, E. Cisbani, F. Xiong, A. Deur, R. D. McKeown, John C. Mitchell, Jacek Golak, J. Marroncle, E. Pace, C. Ciofi degli Atti, G. Kumbartzki, G. J. Lolos, E. Chudakov, J. O. Hansen, P. Djawotho, Karl Slifer, P.Y. Bertin, W. Xu, Sebastien Incerti, P. Vernin, Baile Zhang, L. Todor, Sonja Dieterich, Hiroaki Tsubota, 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 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), E94010, and 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)

Subjects
Nuclear reaction, nuclear spin, sum rules, polarisation in nuclear reactions and scattering, Nuclear Theory, General Physics and Astronomy, FOS: Physical sciences, Impulse (physics), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Settore FIS/04 - Fisica Nucleare e Subnucleare, nuclear structure theory, Helium-3, 0103 physical sciences, ddc:550, electron-nucleus scattering, Nuclear Experiment (nucl-ex), 010306 general physics, Spin (physics), Nuclear Experiment, Physics, Magnetic moment, 010308 nuclear & particles physics, nuclear resonances, Nuclear structure, Three-body problem, structure functions, High Energy Physics::Experiment, Atomic physics, nulei with mass number 1 to 5, Nucleon
Abstract

We present a measurement of the spin-dependent cross sections for the \vec{^3He}(\vec{e},e')X} reaction in the quasielastic and resonance regions at four-momentum transfer 0.1 < Q^2< 0.9 GeV^2. The spin-structure functions have been extracted and used to evaluate the nuclear Burkhardt--Cottingham and extended GDH sum rules for the first time. Impulse approximation and exact three-body Faddeev calculations are also compared to the data in the quasielastic region., Final version

Published
2008
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10. Compton Scattering Cross Section on the Proton at High Momentum Transfer

Author

K. S. Egiyan, Seonho Choi, L. Zhu, Branislav Vlahovic, L. Pentchev, J. Gomez, D. G. Meekins, Jrm Annand, Bogdan Wojtsekhowski, F. Sabatié, Ronald Gilman, K. McCormick, E. Piasetzky, C. E. Hyde, A. Camsonne, A. V. Glamazdin, P. Stoler, A. Ketikyan, C. W. de Jager, K. A. Aniol, V. Sulkosky, C. F. Perdrisat, Dipangkar Dutta, Kent Paschke, F. Garibaldi, A. Deur, J. P. Chen, G. Laveissière, A. Shahinyan, C. C. Chang, C. R. Howell, J. R. Calarco, P. Moussiegt, R. A. Lindgren, J. J. LeRose, Olivier Gayou, D. M. Nikolenko, R. Michaels, P. V. Degtyarenko, P. Bosted, V. H. Mamyan, Yu. V. Shestakov, Charles Glashausser, N. Savvinov, D. J. Margaziotis, X. Zheng, Anatoly Radyushkin, E. Chudakov, I. A. Rachek, M. Roedelbronn, T. Hunyady, K. Kramer, S. K. Nanda, Haiyan Gao, J. O. Hansen, B. E. Norum, Areg Danagoulian, P.Y. Bertin, R. Roche, V. A. Punjabi, Guy Ron, H. Xiang, L. Todor, S. Tajima, T. Chang, P. Solvignon, Z. E. Meziani, Karl Slifer, David Hamilton, Pete Markowitz, W. Hinton, G. J. Kumbartzki, Vladimir Nelyubin, M. Khandaker, Alan M. Nathan, D. Hayes, L. Bimbot, Larry Weinstein, R. I. Pomatsalyuk, Arijit Saha, S. Širca, T. Horn, Douglas Higinbotham, M. K. Jones, B. Reitz, H. Voskanyan, K. Wang, X. Jiang, V. P. Kubarovsky, 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
Physics, Quantum chromodynamics, Elastic scattering, Particle physics, Proton, 010308 nuclear & particles physics, Scattering, 13.60.Fz, 24.85.+p, Momentum transfer, Compton scattering, FOS: Physical sciences, General Physics and Astronomy, Perturbative QCD, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Cross section (physics), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment
Abstract

Cross-section values for Compton scattering on the proton were measured at 25 kinematic settings over the range s = 5-11 and -t = 2-7 GeV2 with statistical accuracy of a few percent. The scaling power for the s-dependence of the cross section at fixed center of mass angle was found to be 8.0 +/ 0.2, strongly inconsistent with the prediction of perturbative QCD. The observed cross-section values are in fair agreement with the calculations using the handbag mechanism, in which the external photons couple to a single quark., 5 pages, 5 figures

Published
2007
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11. Polarization Transfer in Proton Compton Scattering at High Momentum Transfer

Author

D. J. Hamilton, V. H. Mamyan, K. A. Aniol, J. R. M. Annand, P. Y. Bertin, L. Bimbot, P. Bosted, J. R. Calarco, A. Camsonne, G. C. Chang, T.-H. Chang, J.-P. Chen, Seonho Choi, E. Chudakov, A. Danagoulian, P. Degtyarenko, C. W. de Jager, A. Deur, D. Dutta, K. Egiyan, H. Gao, F. Garibaldi, O. Gayou, R. Gilman, A. Glamazdin, C. Glashausser, J. Gomez, J.-O. Hansen, D. Hayes, D. Higinbotham, W. Hinton, T. Horn, C. Howell, T. Hunyady, C. E. Hyde-Wright, X. Jiang, M. K. Jones, M. Khandaker, A. Ketikyan, V. Kubarovsky, K. Kramer, G. Kumbartzki, G. Laveissière, J. LeRose, R. A. Lindgren, D. J. Margaziotis, P. Markowitz, K. McCormick, Z.-E. Meziani, R. Michaels, P. Moussiegt, S. Nanda, A. M. Nathan, D. M. Nikolenko, V. Nelyubin, B. E. Norum, K. Paschke, L. Pentchev, C. F. Perdrisat, E. Piasetzky, R. Pomatsalyuk, V. A. Punjabi, I. Rachek, A. Radyushkin, B. Reitz, R. Roche, M. Roedelbronn, G. Ron, F. Sabatie, A. Saha, N. Savvinov, A. Shahinyan, Y. Shestakov, S. Širca, K. Slifer, P. Solvignon, P. Stoler, S. Tajima, V. Sulkosky, L. Todor, B. Vlahovic, L. B. Weinstein, K. Wang, B. Wojtsekhowski, H. Voskanyan, H. Xiang, X. Zheng, L. Zhu, 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
Photon, Proton, Nuclear Theory, General Physics and Astronomy, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Physics, Spectrometer, 010308 nuclear & particles physics, Momentum transfer, Compton scattering, Polarization (waves), Gluon, Calorimeter, High Energy Physics - Phenomenology, High Energy Physics::Experiment
Abstract

The Jefferson Lab Hall A experiment E99-114 comprised a series of measurements to explore proton Compton scattering at high momentum transfer. For the first time, the polarisation transfer observables in the p (~ 0 ~ p) reaction were measured in the GeV energy range, where it is believed that quark-gluon degrees of freedom begin to dominate. The experiment utilised a circularly polarised photon beam incident on a liquid hydrogen target, with the scattered photon and recoil proton detected in a lead-glass calorimeter and a magnetic spectrometer, respectively.

Published
2005
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12. Measurement of the Generalized Polarizabilities of the Proton in Virtual Compton Scattering atQ2=0.92and1.76 GeV2

Author

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

Subjects
Physics, Proton, 010308 nuclear & particles physics, Scattering, Momentum transfer, Compton scattering, General Physics and Astronomy, 01 natural sciences, 7. Clean energy, Nuclear physics, Paramagnetism, Dipole, Pion, Polarizability, 0103 physical sciences, Atomic physics, 010306 general physics
Abstract

We report a virtual Compton scattering study of the proton at low c.m. 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 Q(2)=0.92 and 1.76 GeV2. The electric GP shows a strong falloff with Q2, and its global behavior does not follow a simple dipole form. The magnetic GP shows a rise and then a falloff; 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 piN intermediate states.

Published
2004
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13. Measurement of the Generalized Forward Spin Polarizabilities of the Neutron

Author

G. G. Petratos, Arijit Saha, Z. E. Meziani, John C. Mitchell, W. Xu, M. Liang, Gordon D. Cates, T. Black, E. Lakuriqi, E. J. Brash, C. E. Jones, J. M. Finn, R. Holmes, T. Averett, Shalev Gilad, Baile Zhang, T. Saito, C. W. de Jager, S. Strauch, A. Deur, J. R. Calarco, B. Humensky, Seonho Choi, R. D. McKeown, H. Voskanian, F. Garibaldi, J. O. Hansen, Hiroshi Ueno, I. K. Kominis, L. Todor, Hiroaki Tsubota, D. S. Brown, Y. Roblin, X. Jiang, G. J. Lolos, P. Djawotho, Sonja Dieterich, A. Gasparian, G. J. Kumbartzki, Karl Slifer, A. Ketikyan, J. Berthot, Ronald Gilman, J. C. Yang, S. Malov, E. Burtin, Paul Souder, S. Jensen, Sebastien Incerti, G. Laveissière, G. Jones, Jiansong Gao, Bogdan Wojtsekhowski, Charles Glashausser, L. B. Auerbach, P.Y. Bertin, K. McCormick, S. Frullani, B. Hersman, D. Pripstein, J. J. LeRose, P. Vernin, H. Fonvieille, V. Gorbenko, Jian-Ping Chen, E. W. Hughes, Wolfgang Korsch, S. Teijiro, G. M. Huber, C. Jutier, M. K. Jones, Haiyan Gao, K. Kramer, J. Marroncle, David L. Prout, Nilanga Liyanage, F. Sabatié, R. Michaels, R. L.J. van der Meer, M. Rvachev, A. V. Glamazdin, Z. Chai, M. Kuss, R. DiSalvo, E. Chudakov, Kevin Fissum, R. Suleiman, E. Cisbani, P. A. Zolnierczuk, J. Gomez, M. Amarian, F. Xiong, Ronald Ransome, D. Rowntree, Koji Takahashi, Z. Papandreou, T. Pavlin, K. S. Kumar, Mauro Iodice, G. M. Urciuoli, William Bertozzi, E. Goldberg, 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 E94010

Subjects
Quantum chromodynamics, Physics, Chiral perturbation theory, Spin polarization, 010308 nuclear & particles physics, General Physics and Astronomy, 01 natural sciences, High Energy Physics - Experiment, Baryon, Polarizability, Quantum mechanics, Quantum electrodynamics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Perturbation theory, 010306 general physics, Nucleon, Nuclear Experiment, Spin-½
Abstract

The generalized forward spin polarizabilities $\gamma_0$ and $\delta_{LT}$ of the neutron have been extracted for the first time in a $Q^2$ range from 0.1 to 0.9 GeV$^2$. Since $\gamma_0$ is sensitive to nucleon resonances and $\delta_{LT}$ is insensitive to the $\Delta$ resonance, it is expected that the pair of forward spin polarizabilities should provide benchmark tests of the current understanding of the chiral dynamics of QCD. The new results on $\delta_{LT}$ show significant disagreement with Chiral Perturbation Theory calculations, while the data for $\gamma_0$ at low $Q^2$ are in good agreement with a next-to-lead order Relativistic Baryon Chiral Perturbation theory calculation. The data show good agreement with the phenomenological MAID model., Comment: 5 pages, 2 figures, corrected typo in author name, published in PRL

Published
2004
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14. 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

15. Backward electroproduction ofπ0mesons on protons in the region of nucleon resonances at four momentum transfer squaredQ2=1.0GeV2

Author

P.Y. Bertin, M. K. Jones, B. D. Anderson, G. J. Lolos, M. B. Epstein, S. Frullani, R. W. Lourie, Jing Zhao, W. Kahl, M. Kuss, J. W. Watson, Y. Roblin, Bogdan Wojtsekhowski, William Bertozzi, L. S. Cardman, D. Neyret, S. Jaminion, R. Michaels, S. Platchkov, F. T. Baker, H. Ueno, Pete Markowitz, R. Di Salvo, T. Terasawa, Vincent Breton, M. Khayat, J. Martino, Raphael Noel Tieulent, Sebastien Incerti, A. Saha, L. B. Auerbach, E. J. Brash, G. E. Dodge, V. A. Punjabi, R. A. Lindgren, Richard Madey, G. J. Kumbartzki, G. Laveissière, Z. Papandreou, J. J. LeRose, P. M. Rutt, O. Ravel, Roberto Perrino, R. De Leo, D. J. Margaziotis, J. A. Templon, Ronald Ransome, D. Rowntree, M. Baylac, J. P. Chen, A. Deur, P. Vernin, B. Frois, G. G. Petratos, Z. E. Meziani, K. Kino, E. Chudakov, J. O. Hansen, Justin I. McIntyre, R. I. Pomatsalyuk, K. Wijesooriya, Hiroaki Tsubota, A. Ketikyan, Z. L. Zhou, K. Soldi, A. Serdarevic, L. Bimbot, H. Breuer, M. Liang, R. Van de Vyver, G. M. Urciuoli, A. T. Katramatou, L. C. Alexa, G. Quéméner, V. Gorbenko, F. Renard, N. d'Hose, S. K. Nanda, S. Malov, E. Burtin, J. Domingo, C. R. Howell, J. R. Calarco, J. M. Finn, S. Kerhoas, M. Holtrop, J. Gomez, Thomas E. Smith, C. F. Perdrisat, C. Glashausser, E. Cisbani, W. U. Boeglin, Philippe Grenier, Latifa Elouadrhiri, G. Audit, A. Gasparian, C. E. Hyde-Wright, L. Todor, A. Leone, L. Tiator, S. Mehrabyan, L. A. Ewell, Kazushige Maeda, C. Furget, D. M. Manley, Kevin Fissum, D. G. Zainea, J. Jardillier, J. Gao, K. Arundell, R. Holmes, G. Rutledge, C. C. Chang, L. Van Hoorebeke, K. S. Kumar, Ronald Gilman, K. McCormick, Mauro Iodice, Nilanga Liyanage, H. Fonvieille, Pierre A.M. Guichon, Pavel Sorokin, Larry Weinstein, P. E. Ulmer, Paul Souder, A. V. Glamazdin, Haiyan Gao, R. L.J. van der Meer, S. Kox, G. M. Huber, F. Garibaldi, T. Saito, Richard Wilson, Laird Kramer, J. Y. Mougey, E. Voutier, Branislav Vlahovic, F. Merchez, G. Fournier, James J. Kelly, C. Marchand, Seigo Kato, G. W. Miller, H. Voskanyan, C. Jutier, David L. Prout, T. Pussieux, W. M. Zhang, J. Berthot, R. Suleiman, C. Cavata, S.S. Kamalov, G. Smirnov, A. J. Sarty, Shalev Gilad, C. W. de Jager, K. A. Aniol, E. A.J.M. Offermann, N. Degrande, J. Marroncle, D. Marchand, E. Tomasi-Gustaffson, J. S. Real, and D. S. Dale

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Nuclear Theory, Hadron, Momentum transfer, Sigma, 01 natural sciences, Nuclear physics, Baryon, Pion, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Nucleon, Lepton
Abstract

Exclusive electroproduction of pi{sup 0} 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 sigma{sub T} + epsilon sigma{sub L}, sigma{sub TL}, and sigma{sub TT} were separated from the azimuthal distribution and are presented together with the MAID and SAID parameterizations.

Published
2004
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16. $Q^2$ evolution of the neutron spin structure moments using a $^3He$ target

Author

Amarian, M., Auerbach, L., Averett, T., Berthot, J., Bertin, P., Bertozzi, B., Black, T., Brash, E., Brown, D., Burtin, E., Calarco, J., Cates, G., Chai, Z., Chen, J. -P, Choi, S., Chudakov, E., Cisbani, E., Jager, C. W., Deur, A., Disalvo, R., Dieterich, S., Djawotho, P., Finn, M., Fissum, K., Fonvieille, H., Frullani, S., Gao, H., Gao, J., Garibaldi, F., Gasparian, A., Gilad, S., Gilman, R., Alexander Glamazdin, Glashausser, C., Goldberg, E., Gomez, J., Gorbenko, V., Hansen, J. -O, Hersman, B., Holmes, R., Huber, G. M., Hughes, E., Humensky, B., Incerti, S., Iodice, M., Jensen, S., Jiang, X., Jones, C., Jones, G., Jones, M., Jutier, C., Ketikyan, A., Kominis, I., Korsch, W., Kramer, K., Kumar, K., Kumbartzki, G., Kuss, M., Lakuriqi, E., Laveissiere, G., Lerose, J., Liang, M., Liyanage, N., Lolos, G., Malov, S., Marroncle, J., Mccormick, K., Mckeown, R., Meziani, Z. -E, Michaels, R., Mitchell, J., Papandreou, Z., Pavlin, T., Petratos, G. G., Pripstein, D., Prout, D., Ransome, R., Roblin, Y., Rowntree, D., Rvachev, M., Sabatie, F., Saha, A., Slifer, K., Souder, P., Saito, T., Strauch, S., Suleiman, R., Takahashi, K., Teijiro, S., Todor, L., Tsubota, H., Ueno, H., Urciuoli, G., Meer, R., Vernin, P., Voskanian, H., Wojtsekhowski, B., Xiong, F., Xu, W., Yang, J. -C, Zhang, B., 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 E94010

Subjects
High Energy Physics - Experiment (hep-ex), [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [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 measured the spin structure functions $g_1$ and $g_2$ of $^3$He in a double-spin experiment by inclusively scattering polarized electrons at energies ranging from 0.862 to 5.07 GeV off a polarized $^3$He target at a 15.5$^{\circ}$ scattering angle. Excitation energies covered the resonance and the onset of the deep inelastic regions. We have determined for the first time the $Q^2$ evolution of $\Gamma_1(Q^2)=\int_0^{1} g_1(x,Q^2) dx$, $\Gamma_2(Q^2)=\int_0^1 g_2(x,Q^2) dx$ and $d_2 (Q^2) = \int_0^1 x^2[ 2g_1(x,Q^2) + 3g_2(x,Q^2)] dx$ for the neutron in the range 0.1 GeV$^2$ $\leq Q^2 \leq $ 0.9 GeV$^2$ with good precision. $ \Gamma_1(Q^2)$ displays a smooth variation from high to low $Q^2$. The Burkhardt-Cottingham sum rule holds within uncertainties and $d_2$ is non-zero over the measured range., Comment: 5 pages, 2 figures, submitted to Phys. Rev. Lett.. Updated Hermes data in Fig. 2 (top panel) and their corresponding reference. Updated the low x extrapolation error Fig. 2 (middle panel). Corrected references to ChiPT calculations

Published
2004

17. 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
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18. Basic instrumentation for Hall A at Jefferson Lab

Author

T. Pussieux, Paul Souder, J. H. Mitchell, Y. Roblin, O. Ravel, E. Chudakov, K. A. Griffioen, C. Cavata, J. A. Templon, H. F. Ibrahim, J. S. McCarthy, M. A. Stevens, D. P. Watts, B. Frois, W. J. Schneider, Dipangkar Dutta, R. Di Salvo, R. I. Pomatsalyuk, A. Soldi, G. J. Kumbartzki, Arijit Saha, N. Colombel, J. Berthot, Jing Zhao, A. J. Sarty, B. D. Anderson, J. Martine, M. Coman, R. Michaels, M. B. Epstein, R. W. Lourie, J. O. Hansen, N. Degrande, J. Mclntyre, John Arrington, L. Zhu, W. Kahl, Bogdan Wojtsekhowski, P. Djawotho, M. Leuschner, William Bertozzi, K. A. Aniol, A. Gasparian, Karl Slifer, Jrm Annand, C. F. Perdrisat, D. Pripstein, M. Baylac, S. Kox, X. Jiang, K. Kramer, H. Breuer, David Hamilton, Jian-Ping Chen, T. Averett, L. B. Auerbach, G. A. Rutledge, G. Quéméner, Stephanie Escoffier, P.Y. Bertin, R. Suleiman, R. Carr, Pete Markowitz, A. Deur, Z. Papandreou, R. L. Walter, R. D. McKeown, T. P. Gorringe, M. Rvachev, R. Holmes, S. Churchwell, J. Marroncle, S. Platchkov, M. Khandaker, M. Liang, L. Pierangeli, K. Kino, A. Ketikyan, Kevin Fissum, F. W. Hersman, J. LeRose, F. Giuliani, P. E. Ulmer, Roberto Perrino, R. De Leo, J. Gao, L. A. Ewell, S. Jensen, R. Crateri, Shalev Gilad, C. W. de Jager, D. Lhuillier, J.E. Ducret, M. Gricia, R. Iommi, F. Sabatavenere, P. A. Zolnierczuk, K. Wijesooriya, Alan M. Nathan, D. Rowntree, E. Voutier, H. Holmgren, S. K. Nanda, D. G. Meekins, K. S. Egiyan, C. R. Howell, A. Serdarevic-Offermann, Hiroaki Tsubota, D. G. Zainea, J. R. Calarco, S. Esp, T. Terasawa, Vincent Breton, C. C. Chang, J. Domingo, T. Black, A. T. Katramatou, S. Kerhoas, F. Santavenere, J. Y. Mougey, R. Van de Vyver, G. M. Urciuoli, Seigo Kato, G. M. Huber, B. Reitz, E. J. Beise, K. S. Kumar, F. Garibaldi, Pavel Sorokin, G. J. Lolos, M. Lucentini, J. Segal, H. Xiang, D. V. Boykin, W. U. Boeglin, C. Glashausser, E. Cisbani, A. Leone, R. D. Ransomez, Gordon D. Cates, Sonja Dieterich, H. Voskanyan, C. Jutier, R. L.J. van der Meer, Olivier Gayou, James A. Miller, L. Van Hoorebeke, Sebastien Incerti, J. Jardillier, L. Cardman, James J. Kelly, F. Xiong, S. Jaminion, I. K. Kominis, K. McCormick, P. Vernin, P. M. Rutt, A. Petrosyan, David L. Prout, Nilanga Liyanage, L. Lagamba, X. Zheng, S. L. Spiegel, Branislav Vlahovic, Leonid Levchuk, Mauro Iodice, Larry Weinstein, F. Marie, D. G. Ireland, N. S. Chant, David Manley, V. A. Punjabi, C. E. Jones, J. Gomez, Wolfgang Korsch, W. Xu, J. W. Watson, M. Roedelbronn, F. T. Baker, Z. E. Meziani, T. Saito, S. Frullani, H. Ueno, E. J. Brash, R. Roche, E. Hovhannisyan, C. E. Hyde-Wright, N. d'Hose, L. Bimbot, G. Laveissière, R. Madey, Kazushige Maeda, A. Gavalya, W. Miller, D. Neyret, T. P. Smith, B. Diederich, E. Burtin, M. Holtrop, L. Todor, G. Dezern, Z. L. Zhou, K. Livingston, D. S. Dale, V. Zeps, S. Mayilyan, E. Folts, B. D. Milbrath, Haiyan Gao, J. M. Finn, O. Rondon-Aramayo, R. A. Lindgren, V. Gorbenko, A. V. Glamazdin, Z. Chai, E. A.J.M. Offermann, S. Malov, J. Alcorn, S. Strauch, A. Shahinyan, G. Rosner, H. Fonvieille, P. G. Roos, E. W. Hughes, K. Joo, D. S. Brown, P. Brindza, G. G. Petratos, S. van Verst, M. Khayat, S. Colilli, Douglas Higinbotham, M. K. Jones, D. J. Margaziotis, M. Kuss, Seonho Choi, Ronald Gilman, Thomas Jefferson National Accelerator Facility (Jefferson Lab), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), 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
Physics, Nuclear and High Energy Physics, Spectrometer, 010308 nuclear & particles physics, Cryogenics, Scintillator, 7. Clean energy, 01 natural sciences, Particle identification, Magnetic field, Nuclear physics, Cardinal point, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Nuclear Experiment, 010306 general physics, Nucleon, Instrumentation, Cherenkov radiation
Abstract

The instrumentation in Hall A at the Thomas Jefferson National Accelerator Facility was designed to study electro-and photo-induced reactions at very high luminosity and good momentum and angular resolution for at least one of the reaction products. The central components of Hall A are two identical high resolution spectrometers, which allow the vertical drift chambers in the focal plane to provide a momentum resolution of better than 2 x 10(-4). A variety of Cherenkov counters, scintillators and lead-glass calorimeters provide excellent particle identification. The facility has been operated successfully at a luminosity well in excess of 10(38) CM-2 s(-1). The research program is aimed at a variety of subjects, including nucleon structure functions, nucleon form factors and properties of the nuclear medium. (C) 2003 Elsevier B.V. All rights reserved.

Published
2004
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19. Photon electroproduction from hydrogen at backward angles and momentum transfer squared of $Q^{2}=1.0Gev^{2}$

Author

Laveissière, 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, Böglin, W, Brash, E J, Breton, V, 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, John 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, Gómez, 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, Le Rose, J J, Liang, M, Lindgren, R A, Liyanage, N K, 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, McCormick, K, McIntyre, J, Mehrabyan, S S, Merchez, F, Meziani, Z E, Michaels, R, Miller, G W, Mougey, J Y, Nanda, S K, Neyret, D, Offermann, E, Papandreou, Z, Perdrisat, C F, Perrino, R, Petratos, G G, Platchkov, S, Pomatsalyuk, R I, 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, Saitô, T, Sarty, A J, Serdarevic, A, Smith, T, Smirnov, G, Soldi, K, Sorokin, P, Souder, P A, Suleiman, R, Templon, J A, Terasawa, T, Tiator, L, Tieulent, R, Tomasi-Gustafsson, E, Tsubota, H, Ueno, H, Ulmer, P E, Urciuoli, G M, Van De Vyver, R, Van, R L J, der Meer, 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, and Zhou, Z L

Subjects
Particle Physics - Experiment
Published
2004

20. Q2Evolution of the Generalized Gerasimov-Drell-Hearn Integral for the Neutron using aH3eTarget

Author

Bogdan Wojtsekhowski, J. J. LeRose, V. Gorbenko, A. Saha, X. Jiang, E. Cisbani, Ronald Ransome, D. Rowntree, P. Djawotho, J. P. Chen, C. Glashausser, Gordon D. Cates, Karl Slifer, E. Lakuriqi, T. Averett, Paul Souder, G. M. Urciuoli, J. Berthot, E. J. Brash, Hiroshi Ueno, A. Ketikyan, S. Teijiro, T. Pavlin, F. Sabatié, Kevin Fissum, Jiansong Gao, K. S. Kumar, M. Amarian, F. Xiong, Nilanga Liyanage, G. Jones, C. E. Jones, M. Liang, R. DiSalvo, R. Suleiman, P. A. Zolnierczuk, A. V. Glamazdin, Z. Chai, Haiyan Gao, D. Pripstein, E. Chudakov, C. Jutier, R. Michaels, M. K. Jones, J. O. Hansen, S. Malov, P.Y. Bertin, M. Finn, S. Frullani, E. Burtin, J. Gomez, J. R. Calarco, David L. Prout, R. L.J. van der Meer, S. Jensen, Z. Papandreou, D. S. Brown, G. J. Lolos, M. Kuss, Mauro Iodice, M. Rvachev, K. Takahashi, William Bertozzi, A. Gasparian, H. Voskanian, G. M. Huber, F. Garibaldi, Sebastien Incerti, E. Goldberg, I. K. Kominis, Seonho Choi, S. Strauch, Shalev Gilad, L. B. Auerbach, C. W. de Jager, P. Vernin, Ronald Gilman, K. McCormick, Hiroaki Tsubota, H. Fonvieille, E. W. Hughes, Wolfgang Korsch, T. B. Humensky, W. Xu, Baile Zhang, A. Deur, R. D. McKeown, L. Todor, G. G. Petratos, Z. E. Meziani, T. Saito, Sonja Dieterich, K. Kramer, Y. Roblin, F. W. Hersman, J. Marroncle, John C. Mitchell, G. J. Kumbartzki, G. Laveissière, T. Black, R. Holmes, and J. C. Yang

Subjects
Physics, Range (particle radiation), Cross section.transverse, Particle physics, 010308 nuclear & particles physics, Scattering, Nuclear Theory, General Physics and Astronomy, Virtual particle, Electron, 01 natural sciences, Resonance (particle physics), Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Neutron, Nuclear Experiment, 010306 general physics, Nucleon
Abstract

We present data on the inclusive scattering of polarized electrons from a polarized ^3He target at energies from 0.862 to 5.06 GeV, obtained at a scattering angle of 15.5°. Our data include measurements from the quasielastic peak, through the nucleon resonance region, and beyond, and were used to determine the virtual photon cross-section difference σ_(1/2)-σ_(3/2). We extract the extended Gerasimov-Drell-Hearn integral for the neutron in the range of four-momentum transfer squared Q^2 of 0.1–0.9 GeV^2.

Published
2002
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21. Exclusive Compton Scattering on the Proton

Author

William Bertozzi, W. Hersman, M. Bouwhuis, C. E. Hyde-Wright, Ronald Gilman, R. J. Holt, Y. Roblin, X. Jiang, Pete Markowitz, Matthew Jones, P.Y. Bertin, Gerald Feldman, G. E. Dodge, M. Kuss, K. Wijesooriya, V. Gladyshev, R. A. Lindgren, J. J. LeRose, G. Chang, C. E. Keppel, P. V. Degtyarenko, J. P. Chen, John C. Mitchell, A. Shahinyan, Nilanga Liyanage, G. Strobel, A. Gasparian, J. Berthot, S. Strauch, T. Chang, R. Michaels, Anatoly Radyushkin, M. B. Leuschner, Rolf Ent, Andrei Afanasev, J. A. Templon, D. S. Brown, C. DeJager, H. Voskanyan, A. Petrosyan, Frank Klein, A. Saha, J. Gomez, Ronald Ransome, Larry Weinstein, D. Rowntree, K. S. Egiyan, F. Sabatié, Z. Zu, W.U. Boeglin, P. M. Rutt, Alan M. Nathan, M. Liang, J. Hines, P. E. Bosted, M. Roedelbronn, Olfred Hansen, S. E. Williamson, S. Mailyan, P. E. Ulmer, C. Glashausser, E. Chudakov, E. Hoohauneysan, C. L. Morris, S. Churchwell, Shalev Gilad, John M. Finn, C. R. Howell, J. R. Calarco, Bogdan Wojtsekhowski, A. Ketikyan, and H. Fonvielle

Subjects
Physics, Elastic scattering, Nuclear physics, Photon, Proton, Scattering, Bremsstrahlung, Compton scattering, Parton, Electron, Nuclear Experiment, Particle Physics - Experiment
Abstract

An experiment is proposed to measure the cross sections for Real Compton Scattering from the proton in the energy range 3-6 GeV and over a wide angular range; and to measure the longitudinal and transverse components of the polarization transfer to the recoil proton at a single kinematic point. Together; these measurements will test models of the reaction mechanism and determine new structure functions of the proton that are related to the same nonforward parton densities that determine the elastic electron scattering form factors and the parton densities. The experiment utilizes an untagged bremsstrahlung photon beam and the standard Hall A cryogenic targets. The scattered photon is detected in a photon spectrometer; currently under construction. The coincident recoil proton is detected in one of the Hall A magnetic spectrometers and its polarization components are measured in the existing Focal Plane Polarimeter. This proposal extends and supercedes E97-108 which was approved by PAC13.

Published
1999
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