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Start Over Author "Todor L" Topic nuclear theory
18 results on '"Todor L"'

1. Measurements of the Separated Longitudinal Structure Function F_L from Hydrogen and Deuterium Targets at Low Q^2

Author

Tvaskis, V., Tvaskis, A., Niculescu, I., Abbott, D., Adams, G. S., Afanasev, A., Ahmidouch, A., Angelescu, T., Arrington, J., Asaturyan, R., Avery, S., Baker, O. K., Benmouna, N., Berman, B. L., Biselli, A., Blok, H. P., Boeglin, W. U., Bosted, P. E., Brash, E., Breuer, H., Chang, G., Chant, N., Christy, M. E., Connell, S. H., Dalton, M. M., Danagoulian, S., Day, D., Dodario, T., Dunne, J. A., Dutta, D., Khayari, N. El, Ent, R., Fenker, H. C., Frolov, V. V., Gaskell, D., Garrow, K., Gilman, R., Gueye, P., Hafidi, K., Hinton, W., Holt, R. J., Horn, T., Huber, G. M., Jackson, H., Jiang, X., Jones, M. K., Joo, K., Kelly, J. J., Keppel, C. E., Kuhn, J., Kinney, E., Klein, A., Kubarovsky, V., Liang, M., Liang, Y., Lolos, G., Lung, A., Mack, D., Malace, S., Markowitz, P., Mbianda, G., McGrath, E., Mckee, D., McKee, P., Meekins, D. G., Mkrtchyan, H., Moziak, B., Napolitano, J., Navasardyan, T., Niculescu, G., Nozar, M., Ostapenko, T., Papandreou, Z., Potterveld, D., Reimer, P. E., Reinhold, J., Roche, J., Rock, S. E., Schulte, E., Segbefia, E., Smith, C., Smith, G. R., Stoler, P., Tadevosyan, V., Tang, L., Telfeyan, J., Todor, L., Ungaro, M., Uzzle, A., Vidakovic, S., Villano, A., Vulcan, W. F., Wang, M., Warren, G., Wesselmann, F., Wojtsekhowski, B., Wood, S. A., Xu, C., Yan, C., Yuan, L., Zheng, X., Zihlmann, B., and Zhu, H.

Subjects
High Energy Physics - Experiment (hep-ex), Nuclear Theory, FOS: Physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment, High Energy Physics - Experiment
Abstract

Structure functions, as measured in lepton-nucleon scattering, have proven to be very useful in studying the quark dynamics within the nucleon. However, it is experimentally difficult to separately determine the longitudinal and transverse structure functions, and consequently there are substantially less data available for the longitudinal structure function in particular. Here we present separated structure functions for hydrogen and deuterium at low four--momentum transfer squared, Q^2< 1 GeV^2, and compare these with parton distribution parameterizations and a k_T factorization approach. While differences are found, the parameterizations generally agree with the data even at the very low Q^2 scale of the data. The deuterium data show a smaller longitudinal structure function, and smaller ratio of longitudinal to transverse cross section R, than the proton. This suggests either an unexpected difference in R for the proton and neutron or a suppression of the gluonic distribution in nuclei., 11 pages, 7 figures, 2 data tables

Published
2016

2. Moments of the Spin Structure Functions g_1^p and g_1^d for 0.05 < Q^2 < 3.0 GeV^2

Author

Prok, Y., Bosted, P., Burkert, V. D., Deur, A., Dharmawardane, K. V., Dodge, G. E., Griffioen, K. A., Kuhn, S. E., Minehart, R., Adams, G., Amaryan, M.J., Anghinolfi, M., Asryan, G., Audit, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J.P., Baltzell, N.A., Barrow, S., Battaglieri, M., Beard, K., Bedlinskiy, I., Bektasoglu, M., Bellis, M., Benmouna, N., Berman, B.L., Biselli, A.S., Blaszczyk, L., Boiarinov, S., Bonner, B.E., Bouchigny, S., Bradford, R., Branford, D., Briscoe, W.J., Brooks, W.K., B¨ultmann, S., Butuceanu, C., Calarco, J.R., Careccia, S.L., Carman, D.S., Casey, L., Cazes, A., Chen, Si, Cheng, L., Cole, P.L., Collins, P., Coltharp, P., Cords, D., Corvisiero, P., Crabb, D., Crede, V., Cummings, J.P., Dale, D., Dashyan, N., De Masi, R., De Vita, R., De Sanctis, E., Degtyarenko, P.V., Denizli, H., Dennis, L., Dhuga, K.S., Dickson, R., Djalali, C., Doughty, D., Dugger, M., Dytman, S., Dzyubak, O.P., Egiyan, H., Egiyan, K.S., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fatemi, R., Fedotov, G., Feldman, G., Fersh, R.G., Feuerbach, R.J., Forest, T.A., Fradi, A., Funsten, H., Garçon, M., Gavalian, G., Gevorgyan, N., Gilfoyle, G.P., Giovanetti, K.L., Girod, F.X., Goetz, J.T., Golovatch, E., Gothe, R.W., Guidal, M., Guillo, M., Guler, N., Guo, L., Gyurjyan, V., Hadjidakis, C., Hafidi, K., Hakobyan, H., Hanretty, C., Hardie, J., Hassall, N., Heddle, D., Hersman, F.W., Hicks, K., Hleiqawi, I., Holtrop, M., Huertas, M., Hyde-Wright, C.E., Ilieva, Y., Ireland, D.G., Ishkhanov, B.S., Isupov, E.L., Ito, M.M., Jenkins, D., Jo, H.S., Johnstone, J.R., Joo, K., Juengst, H.G., Kalantarians, N., Keith, C.D., Kellie, J.D., Khandaker, M., Kim, K.Y., Kim, K., Kim, W., Klein, A., Klein, F.J., Klusman, M., Kossov, M., Krahn, Z., Kramer, L.H., Kubarovsky, V., Kuhn, J., Kuleshov, S.V., Lachniet, J., Laget, J.M., Langheinrich, J., Lawrence, D., Li, Ji, Lima, A.C.S., Livingston, K., Lu, H.Y., Lukashin, K., MacCormick, M., Marchand, C., Markov, N., Mattione, P., McAleer, S., Mckinnon, B., McNabb, J.W.C., Mecking, B.A., Mestayer, M.D., Meyer, C.A., Mibe, T., Mikhailov, K., Mirazita, M., Miskimen, R., Mokeev, V., Morand, L., Moreno, B., Moriya, K., Morrow, S.A., Moteabbed, M., Mueller, J., Munevar, E., Mutchler, G.S., Nadel-Turonski, P., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., Niczyporuk, B.B., Niroula, M.R., Niyazov, R.A., Nozar, M., O'Rielly, G.V., Osipenko, M., Ostrovidov, A.I., Park, K., Pasyuk, E., Paterson, C., Anefalos Pereira, S., Philips, S.A., Pierce, J., Pivnyuk, N., Pocanic, D., Pogorelko, O., Popa, I., Pozdniakov, S., Preedom, B.M., Price, J.W., Procureur, S., Protopopescu, D., Qin, L.M., Raue, B.A., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Rosner, G., Rossi, P., Rowntree, D., Rubin, P.D., Sabatié, F., Salamanca, J., Salgado, C., Santoro, J.P., Sapunenko, V., Schumacher, R.A., Seely, M.L., Serov, V.S., Sharabian, Y.G., Sharov, D., Shaw, J., Shvedunov, N.V., Skabelin, A.V., Smith, E.S., Smith, L.C., Sober, D.I., Sokhan, D., Stavinsky, A., Stepanyan, S.S., Stepanyan, S., Stokes, B.E., Stoler, P., Strakovsky, I.I., Strauch, S., Suleiman, R., Taiuti, M., Tedeschi, D.J., Tkabladze, A., Tkachenko, S., Todor, L., Ungaro, M., Vineyard, M.F., Vlassov, A.V., Watts, D.P., Weinstein, L.B., Weygand, D.P., Williams, M., Wolin, E., Wood, M.H., Yegneswaran, A., Yun, J., Zana, L., Zhang, J., Zhao, B., Zhao, Z.W., 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), Thomas Jefferson National Accelerator Facility (Jefferson Lab), CLAS, and 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)

Subjects
Spin structure functions, 13.60.Hb, 13.88.+e, 14.20.Dh, nucleon structure, Nuclear Theory, High Energy Physics::Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, Chiral Perturbation Theory
Abstract

The spin structure functions g_1 for the proton and the deuteron have been measured over a wide kinematic range in x and Q2 using 1.6 and 5.7 GeV longitudinally polarized electrons incident upon polarized NH_3 and ND_3 targets at Jefferson Lab. Scattered electrons were detected in the CEBAF Large Acceptance Spectrometer, for 0.05 < Q^2 < 5 GeV^2 and W < 3 GeV. The first moments of g_1 for the proton and deuteron are presented -- both have a negative slope at low Q^2, as predicted by the extended Gerasimov-Drell-Hearn sum rule. The first result for the generalized forward spin polarizability of the proton gamma_0^p is also reported. This quantity shows strong Q^2 dependence at low Q^2, while Q^6\gamma_0^p seems to flatten out at the highest Q^2 accessed by our experiment. Although the first moments of g_1 are consistent with Chiral Perturbation Theory (ChPT) calculations up to approximately Q^2 = 0.06 GeV^2, a significant discrepancy is observed between the \gamma_0^p data and ChPT for gamma_0^p, even at the lowest Q2., Comment: Final version as published in PLB. Added a parametrization of world data at high Q^2 to Fig. 3

Published
2008

3. Cross sections and beam asymmetries for $\vev{e}p \to en\pi^+$ in the nucleon resonance region for $1.7 \le Q^2 \le 4.5 (GeV)^2$

Author

Park, K., Burkert, V.D., Kim, W., Aznauryan, I.G., Minehart, R., Smith, L.C., Joo, K., Elouadrhiri, L., Adams, G., Amaryan, M.J., Ambrozewicz, P., Anghinol_, M., Asryan, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J.P., Baltzell, N.A., Barrow, S., Batourine, V., Battaglieri, M., Bedlinskiy, I., Bektasoglu, M., Bellis, M., Benmouna, N., Berman, B.L., Biselli, A.S., Blaszczyk, L., Bonner, B.E., Bookwalter, C., Bouchigny, S., Boiarinov, S., Bradford, R., Branford, D., Briscoe, W.J., Brooks, W.K., Bultmann, S., Butuceanu, C., Calarco, J.R., Careccia, S.L., Carman, D.S., Casey, L., Cazes, A., Chen, Si, Cheng, L., Cole, P.L., Collins, P., Coltharp, P., Cords, D., Corvisiero, P., Crabb, D., Crede, V., Cummings, J.P., Dale, D., Dashyan, N., De Masi, R., De Vita, R., De Sanctis, E., Degtyarenko, P.V., Denizli, H., Dennis, L., Deur, A., Dhamija, S., Dharmawardane, K.V., Dhuga, K.S., Dickson, R., Djalali, C., Dodge, G.E., Donnelly, J., Doughty, D., Dugger, M., Dytman, S., Dzyubak, O.P., Egiyan, H., Egiyan, K.S., El Fassi, L., Eugenio, P., Fatemi, R., Fedotov, G., Feldman, G., Feuerbach, R.J., Forest, T.A., Fradi, A., Funsten, H., Gabrielyan, M.Y., Garcon, M., Gavalian, G., Gevorgyan, N., Gilfoyle, G.P., Giovanetti, K.L., Girod, F.X., Goetz, J.T., Gohn, W., Golovatch, E., Gonenc, A., Gordon, C.I.O., Gothe, R.W., Graham, L., Grioen, K.A., Guidal, M., Guillo, M., Guler, N., Guo, L., Gyurjyan, V., Hadjidakis, C., Hadi, K., Hafnaoui, K., Hakobyan, H., Hakobyan, R.S., Hanretty, C., Hardie, J., Hassall, N., Heddle, D., Hersman, F.W., Hicks, K., Hleiqawi, I., Holtrop, M., Hyde-Wright, C.E., Ilieva, Y., Ireland, D.G., Ishkhanov, B.S., Isupov, E.L., Ito, M.M., Jenkins, D., Jo, H.S., Johnstone, J.R., Juengst, H.G., Kalantarians, N., Keller, D., Kellie, J.D., Khandaker, M., Kim, K.Y., Klein, A., Klein, F.J., Klimenko, A.V., Klusman, M., Kossov, M., Krahn, Z., Kramer, L.H., Kubarovsky, V., Kuhn, J., Kuhn, S.E., Kuleshov, S.V., Kuznetsov, V., Lachniet, J., Laget, J.M., Langheinrich, J., Lawrence, D., Lee, T., Li, Ji, Lima, A.C.S., Livingston, K., Lu, H.Y., Lukashin, K., MacCormick, M., Markov, N., Mattione, P., McAleer, S., Mckinnon, B., McNabb, J.W.C., Mecking, B.A., Mehrabyan, S., Melone, J.J., Mestayer, M.D., Meyer, C.A., Mibe, T., Mikhailov, K., Mirazita, M., Miskimen, R., Mokeev, V., Morand, L., Moreno, B., Moriya, K., Morrow, S.A., Moteabbed, M., Mueller, J., Munevar, E., Mutchler, G.S., Nadel-Turonski, P., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., Niczyporuk, B.B., Niroula, M.R., Niyazov, R.A., Nozar, M., O'Rielly, G.V., Osipenko, M., Ostrovidov, A.I., Park, S., Pasyuk, E., Paterson, C., Anefalos Pereira, S., Philips, S.A., Pierce, J., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Popa, I., Pozdniakov, S., Preedom, B.M., Price, J.W., Prok, Y., Protopopescu, D., Qin, L.M., Raue, B.A., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Ronchetti, F., Rosner, G., Rossi, P., Rowntree, D., Rubin, P.D., Sabatie, F., Saini, M.S., Salamanca, J., Salgado, C., Santoro, J.P., Sapunenko, V., Schott, D., Schumacher, R.A., Serov, V.S., Sharabian, Y.G., Sharov, D., Shaw, J., Shvedunov, N.V., Skabelin, A.V., Smith, E.S., Sober, D.I., Sokhan, D., Stavinsky, A., Stepanyan, S.S., Stepanyan, S., Stokes, B.E., Stoler, P., Strakovsky, I.I., Strauch, S., Suleiman, R., Taiuti, M., Takeuchi, T., Tedeschi, D.J., Tkabladze, A., Tkachenko, S., Todor, L., Tur, C., Ungaro, M., Vineyard, M.F., Vlassov, A.V., Watts, D.P., Weinstein, L.B., Weygand, D.P., Williams, M., Wolin, E., Wood, M.H., Yegneswaran, A., Yun, J., Yurov, M., Zana, L., Zhang, B., Zhang, J., Zhao, B., Zhao, Z.W., 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), 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), CLAS, 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
High Energy Physics - Phenomenology, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, High Energy Physics - Experiment
Abstract

The exclusive electroproduction process $\vec{e}p \to e^\prime n \pi^+$ was measured in the range of the photon virtuality $Q^2 = 1.7 - 4.5 \rm{GeV^2}$, and the invariant mass range for the $n\pi^+$ system of $W = 1.15 - 1.7 \rm{GeV}$ using the CEBAF Large Acceptance Spectrometer. For the first time, these kinematics are probed in exclusive $\pi^+$ production from protons with nearly full coverage in the azimuthal and polar angles of the $n\pi^+$ center-of-mass system. The $n\pi^+$ channel has particular sensitivity to the isospin 1/2 excited nucleon states, and together with the $p\pi^0$ final state will serve to determine the transition form factors of a large number of resonances. The largest discrepancy between these results and present modes was seen in the $\sigma_{LT'}$ structure function. In this experiment, 31,295 cross section and 4,184 asymmetry data points were measured. Because of the large volume of data, only a reduced set of structure functions and Legendre polynomial moments can be presented that are obtained in model-independent fits to the differential cross sections.

Published
2007

4. Experimental study of exclusive $^2$H$(e,e^\prime p)n$ reaction mechanisms at high $Q^2$

Author

Egiyan, K.S., Asryan, G., Gevorgyan, N., Griffioen, K.A., Laget, J.M., Kuhn, S.E., Adams, G., Amaryan, M.J., Ambrozewicz, P., Anghinolfi, M., Audit, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J.P., Baltzell, N.A., Barrow, S., Batourine, V., Battaglieri, M., Bedlinskiy, I., Bektasoglu, M., Bellis, M., Benmouna, N., Berman, B.L., Biselli, A.S., Blaszczyk, L., Bouchigny, S., Boiarinov, S., Bradford, R., Branford, D., Briscoe, W.J., Brooks, W.K., Bültmann, S., Burkert, V.D., Butuceanu, C., Calarco, J.R., Careccia, S.L., Carman, D.S., Cazes, A., Chen, Si, Cole, P.L., Collins, P., Coltharp, P., Cords, D., Corvisiero, P., Crabb, D., Crede, V., Cummings, J.P., Dashyan, N., De Masi, R., De Vita, R., De Sanctis, E., Degtyarenko, P.V., Denizli, H., Dennis, L., Deur, A., Dharmawardane, K.V., Dickson, R., Djalali, C., Dodge, G.E., Donnelly, J., Doughty, D., Dugger, M., Dytman, S., Dzyubak, O.P., Egiyan, H., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fatemi, R., Fedotov, G., Feldman, G., Feuerbach, R.J., Fersch, R., Garçon, M., Gavalian, G., Gilfoyle, G.P., Giovanetti, K.L., Girod, F.X., Goetz, J.T., Gonenc, A., Gordon, C.I.O., Gothe, R.W., Guidal, M., Guillo, M., Guler, N., Guo, L., Gyurjyan, V., Hadjidakis, C., Hafidi, K., Hakobyan, H., Hakobyan, R.S., Hanretty, C., Hardie, J., Hersman, F.W., Hicks, K., Hleiqawi, I., Holtrop, M., Hyde-Wright, C.E., Ilieva, Y., Ireland, D.G., Ishkhanov, B.S., Isupov, E.L., Ito, M.M., Jenkins, D., Jo, H.S., Joo, K., Juengst, H.G., Kalantarians, N., Kellie, J.D., Khandaker, M., Kim, W., Klein, A., Klein, F.J., Klimenko, A.V., Kossov, M., Krahn, Z., Kramer, L.H., Kubarovsky, V., Kuhn, J., Kuleshov, S.V., Lachniet, J., Langheinrich, J., Lawrence, D., Li, Ji, Livingston, K., Lu, H.Y., MacCormick, M., Marchand, C., Markov, N., Mattione, P., McAleer, S., Mckinnon, B., McNabb, J.W.C., Mecking, B.A., Mehrabyan, S., Melone, J.J., Mestayer, M.D., Meyer, C.A., Mibe, T., Mikhailov, K., Minehart, R., Mirazita, M., Miskimen, R., Mokeev, V., Moriya, K., Morrow, S.A., Moteabbed, M., Mueller, J., Munevar, E., Mutchler, G.S., Nadel-Turonski, P., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., Niczyporuk, B.B., Niroula, M.R., Niyazov, R.A., Nozar, M., O'Rielly, G.V., Osipenko, M., Ostrovidov, A.I., Park, K., Pasyuk, E., Paterson, C., Anefalos Pereira, S., Pierce, J., Pivnyuk, N., Pocanic, D., Pogorelko, O., Pozdniakov, S., Preedom, B.M., Price, J.W., Prok, Y., Protopopescu, D., Raue, B.A., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Ronchetti, F., Rosner, G., Rossi, P., Sabatié, F., Salamanca, J., Salgado, C., Santoro, J.P., Sapunenko, V., Schumacher, R.A., Serov, V.S., Sharabian, Y.G., Shvedunov, N.V., Skabelin, A.V., Smith, E.S., Smith, L.C., Sober, D.I., Sokhan, D., Stavinsky, A., Stepanyan, S.S., Stepanyan, S., Stokes, B.E., Stoler, P., Strauch, S., Taiuti, M., Tedeschi, D.J., Thoma, U., Tkabladze, A., Tkachenko, S., Todor, L., Tur, C., Ungaro, M., Vineyard, M.F., Vlassov, A.V., Watts, D.P., Weinstein, L.B., Weygand, D.P., Williams, M., Wolin, E., Wood, M.H., Yegneswaran, A., Zana, L., Zhang, J., Zhao, B., Zhao, Z.W., 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), CLAS, 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
25.10.+s, 25.30.Fj, Nuclear Theory, FOS: Physical sciences, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

The reaction $^2$H$(e,e^\prime p)n$ has been studied with full kinematic coverage for photon virtuality $1.75, Comment: 6 pages, 4 figures

Published
2007

5. 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

6. Measurement of the Deuteron Structure Function F2 in the Resonance Region and Evaluation of Its Moments

Author

Adams, G., Ambrozewicz, P., Anghinolfi, M., Asavapibhop, B., Asryan, G., Audit, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J.P., Baltzell, N.A., Barrow, S., Batourine, V., Battaglieri, M., Beard, K., Bedlinskiy, I., Bektasoglu, M., Bellis, M., Benmouna, N., Bennhold, C., Biselli, A.S., Boiarinov, S., Bouchigny, S., Bradford, R., Branford, D., Briscoe, W.J., Brooks, W.K., Bültmann, S., Burkert, V.D., Butuceanu, C., Calarco, J.R., Careccia, S.L., Carman, D.S., Carnahan, B., Chen, Si, Cole, P.L., Coleman, A., Coltharp, P., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Cummings, J.P., Degtyarenko, P.V., Denizli, H., Dennis, L., De Sanctis, E., Deur, A., Devita, R., Dharmawardane, K.V., Dhuga, K.S., Djalali, C., Dodge, G.E., Donnelly, J., Doughty, D., Dragovitsch, P., Dugger, M., Dytman, S., Dzyubak, O.P., Egiyan, H., Egiyan, K.S., Elouadrhiri, L., Empl, A., Eugenio, P., Fatemi, R., Fedotov, G., Feldman, G., Feuerbach, R.J., Fix, A., Forest, T.A., Funsten, H., Gavalian, G., Gilfoyle, G.P., Giovanetti, K.L., Girod, F.X., Goetz, J.T., Gothe, R.W., Griffioen, K.A., Guidal, M., Guler, N., Guo, L., Gyurjyan, V., Hadjidakis, C., Hakobyan, R.S., Hardie, J., Heddle, D., Hersman, F.W., Hicks, K., Hleiqawi, I., Holtrop, M., Hu, J., Huertas, M., Hyde-Wright, C.E., Ilieva, Y., Ireland, D.G., Ishkhanov, B.S., Ito, M.M., Jenkins, D., Jo, H.S., Joo, K., Juengst, H.G., Kellie, J.D., Khandaker, M., Kim, K.Y., Kim, K., Kim, W., Klein, A., Klein, F.J., Klimenko, A.V., Klusman, M., Kossov, M., Kramer, L.H., Kubarovsky, V., Kuhn, J., Kuhn, S.E., Lachniet, J., Laget, J.M., Langheinrich, J., Lawrence, D., Lee, T., Lima, A.C.S., Livingston, K., Lukashin, K., Manak, J.J., Marchand, C., McAleer, S., Mckinnon, B., McNabb, J.W.C., Mecking, B.A., Mestayer, M.D., Meyer, C.A., Mibe, T., Mikhailov, K., Minehart, R., Mirazita, M., Miskimen, R., Mokeev, V., Morrow, S.A., Muccifora, V., Mueller, J., Mutchler, G.S., Nadel-Turonski, P., Napolitano, J., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., Niczyporuk, B.B., Niyazov, R.A., Nozar, M., O'Rielly, G.V., Osipenko, M., Ostrovidov, A.I., Park, K., Pasyuk, E., Paterson, C., Philips, S.A., Pierce, J., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Pozdniakov, S., Preedom, B.M., Price, J.W., Prok, Y., Protopopescu, D., Qin, L.M., Raue, B.A., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Roberts, W., Ronchetti, F., Rosner, G., Rossi, P., Rowntree, D., Rubin, P.D., Sabatié, F., Salgado, C., Santoro, J.P., Sapunenko, V., Schumacher, R.A., Serov, V.S., Shafi, A., Sharabian, Y.G., Shaw, J., Skabelin, A.V., Smith, E.S., Smith, L.C., Sober, D.I., Stavinsky, A., Stepanyan, S.S., Stepanyan, S., Stokes, B.E., Stoler, P., Strakovsky, I.I., Suleiman, R., Taiuti, M., Taylor, S., Tedeschi, D.J., Thoma, U., Thompson, R., Tkabladze, A., Tkachenko, S., Todor, L., Tur, C., Ungaro, M., Vineyard, M.F., Wang, K., Weinstein, L.B., Weygand, D.P., Williams, M., Wolin, E., Wood, M.H., Yegneswaran, A., Yun, J., Zana, L., Zhang, J., Strauch, S., Berman, B. 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), and CLAS

Subjects
Nuclear Theory, MUON SCATTERING, FOS: Physical sciences, ELECTROMAGNETIC STRUCTURE, MAGNETIC FORM-FACTORS, PROTON SCATTERING, High Energy Physics - Experiment, 12.38.Cy, 12.38.Lg, 12.38.Qk, 13.60.Hb, High Energy Physics - Experiment (hep-ex), STRUCTURE-FUNCTION A(Q(2)), INELASTIC ELECTRON-SCATTERING, QUARK-HADRON DUALITY, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], RADIATIVE-CORRECTIONS, LONGITUDINAL RESPONSE FUNCTIONS, Nuclear Experiment, CROSS-SECTION, INELASTIC ELECTRON-SCATTERING, LONGITUDINAL RESPONSE FUNCTIONS, STRUCTURE-FUNCTION A(Q(2)), MAGNETIC FORM-FACTORS, QUARK-HADRON DUALITY, MUON SCATTERING, ELECTROMAGNETIC STRUCTURE, RADIATIVE-CORRECTIONS, PROTON SCATTERING, CROSS-SECTION
Abstract

PHASE; Inclusive electron scattering off the deuteron has been measured to extract the deuteron structure function F2 with the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility. The measurement covers the entire resonance region from the quasielastic peak up to the invariant mass of the final-state hadronic system W~=2.7 GeV with four-momentum transfers Q2 from 0.4 to 6 (GeV/c)2. These data are complementary to previous measurements of the proton structure function F2 and cover a similar two-dimensional region of Q2 and Bjorken variable x. Determination of the deuteron F2 over a large x interval including the quasielastic peak as a function of Q2, together with the other world data, permit a direct evaluation of the structure function moments for the first time. By fitting the Q2 evolution of these moments with an OPE-based twist expansion we have obtained a separation of the leading twist and higher twist terms. The observed Q2 behavior of the higher twist contribution suggests a partial cancelation of different higher twists entering into the expansion with opposite signs. This cancelation, found also in the proton moments, is a manifestation of the "duality" phenomenon in the F2 structure function.

Published
2005

7. Deeply virtual and exclusive electroproduction of $\omega$-mesons

Author

Morand, L, Dore, D, Garcon, M, Guidal, M, Laget, Jm, Morrow, S, Sabatie, F, Smith, E, Adams, G, Arnbrozewicz, P, Anghinolfi, Marco, Asryan, G, Audit, G, Avakian, H, Bagdasaryan, H, Ball, J, Ball, Jp, Baltzell, Na, Barrow, S, Batourine, V, Battaglieri, Marco, Bektasoglu, M, Bellis, M, Benmouna, N, Berman, Bl, Biselli, As, Boiarinov, S, Bonner, Be, Bouchigny, S, Bradford, R, Branford, D, Briscoe, Wj, Brooks, Wk, Bultmann, S, Burkert, Vd, Butuceanu, C, Calarco, Jr, Careccia, Sl, Carman, Ds, Cazes Antoine Jacques, Chen, S, Cole, Pl, Cords, D, Corvisiero, Pietro, Crabb, D, Cummings, Jp, De Sanctis Enzo, Devita, R, Degtyarenko, Pv, Denizli, H, Dennis, L, Deur, A, Dharmawardane, Kv, Dhuga, Ks, Djalali, C, Dodge, Ge, Donnelly, J, Doughty, D, Dugger, M, Dytman, S, Dzyubak, Op, Egiyan, H, Egiyan, Ks, Elouadrhiri, L, Eugenio, P, Fatemi, R, Feldman, Gerald, Fersch, Rg, Feuerbach, Rj, Funsten, H, Gavalian, G, Gilfoyle, Gp, Giovanetti, Kl, Girod, Fx, Goetz, Jt, Gordon, Cio, Gothe, Rw, Griffioen, Ka, Guillo, M, Guler, N, Guo, L, Gyurjyan, V, Hadjidakis, Cynthia, Hakobyan, Rs, Hardie, J, Heddle, D, Hersman, Fw, Hicks, K, Hleiqawi, I, Holtrop, M, Hyde Wright CE, Ilieva, Y, Ireland, Dg, Ito, Mm, Jenkins, D, Jo, Hs, Joo, K, Juengst, Hg, Kellie, Jd, Khandaker, M, Kim, W, Klein, A, Klein, Fj, Klimenko, Av, Kossov, M, Kubarovski, V, Kramer, Lh, Kuhn, Se, Kuhn, J, Lachniet, J, Langhenirich, J, Lawrence, D, Lee, T, Jun, Li, Livingston, K, Marchand, C, Maximon, Lc, Mcaleer, S, Mckinnon, B, Mcnabb, Jwc, Mecking, Ba, Mehrabyan, S, Melone, Jj, Mestayer, Md, Meyer, Ca, Mikhailov, K, Minehart, R, Mirazita, Marco, Miskimen, R, Mokeev, V, Mueller, J, Mutchler, Gs, Napolitano, J, Nasseripour, R, Niccolai, S, Niculescu, G, Niculescu, I, Niczyporuk, Bb, Niyazov, Ra, Nozar, M, O'Rielly, Gv, Osipenko, Mikhail, Ostrovidov, Ai, Park, K, Pasyuk, E, Philips, Sa, Pivnyuk, N, Pocanic, D, Pogorelko, O, Polli, Ermanno, Popa, I, Pozdniakov, S, Preedom, Bm, Price, Jw, Prok, Y, Protopopescu, D, Raue, Ba, Riccardi, G, Ricco, Giovanni, Ripani, Marco, Ritchie, Bg, Ronchetti, Federico, Rosner, G, Rossi, Patrizia, Rubin, Pd, Salgado Lopez Carlos Alberto, Santoro, Joseph, Sapunenko, Vladimir, Schumacher, Ra, Serov, Vs, Sharabian, Yg, Shaw, J, Skabelin, Av, Smith, Lc, Sober, Di, Stavinsky, A, Stepanyan, S, Stepanyan, Ss, Stokes, Be, Stoler, P, Strakovsky, Ii, Strauch, S, Taiuti, MAURO GINO, Tedeschi, Dj, Thoma, U, Tkabladze, A, Todor, L, Tur, C, Ungaro, M, Vineyard, Mf, Vlassov, Av, Weinstein, Lb, Weygand, Dp, Williams Meurig Crispin Stowe, Wolin, E, Wood, Mh, Yegneswaran, A, Zana, 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), and CLAS

Subjects
Nuclear and High Energy Physics, Particle physics, Photon, Meson, Proton, Nuclear Theory, FOS: Physical sciences, Parton, 13.60.Le - 12.40.Nn -12.38.Bx, 01 natural sciences, Omega, Resonance (particle physics), High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), GENERALIZED PARTON DISTRIBUTIONS, CLAS, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], SCATTERING, 010306 general physics, Nuclear Experiment, Coupling, Physics, 010308 nuclear & particles physics, HYDROGEN, PHOTON, SPIN, GENERALIZED PARTON DISTRIBUTIONS, VECTOR-MESONS, SCATTERING, PHOTON, HYDROGEN, SPIN, CLAS, High Energy Physics::Experiment, Nucleon, VECTOR-MESONS
Abstract

The exclusive omega electroproduction off the proton was studied in a large kinematical domain above the nucleon resonance region and for the highest possible photon virtuality (Q2) with the 5.75 GeV beam at CEBAF and the CLAS spectrometer. Cross sections were measured up to large values of the four-momentum transfer (-t < 2.7 GeV2) to the proton. The contributions of the interference terms sigma_TT and sigma_TL to the cross sections, as well as an analysis of the omega spin density matrix, indicate that helicity is not conserved in this process. The t-channel pi0 exchange, or more generally the exchange of the associated Regge trajectory, seems to dominate the reaction gamma* p -> omega p, even for Q2 as large as 5 GeV2. Contributions of handbag diagrams, related to Generalized Parton Distributions in the nucleon, are therefore difficult to extract for this process. Remarkably, the high-t behaviour of the cross sections is nearly Q2-independent, which may be interpreted as a coupling of the photon to a point-like object in this kinematical limit., 15 pages,19 figures

Published
2005

8. 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

9. The dynamics of the quasielastic $^{16}O$(e,e'p) reaction at $Q^2$ $\approx$ 0.8 (GeV/c)$^2$

Author

G. Fissum, K., Liang, M., D. Anderson, B., A. Aniol, K., Auerbach, L., T. Baker, F., Berthot, J., Bertozzi, W., Bertin, P.Y., Bimbot, L., U. Boeglin, W., J. Brash, E., BRETON, Vincent, Breuer, H., Burtin, E., R. Calarco, J., S. Cardman, L., D. Cates, G., Cavata, C., C. Chang, C., Chen, J.-P., Cisbani, E., S. Dale, D., W. De Jager, C., De Leo, R., Deur, A., Diederich, B., Djawotho, P., Domingo, J., Ducret, J.-E., B. Epstein, M., Ewell, L.A., M. Finn, J., Fonvieille, H., Frois, B., Frullani, S., Gao, J., Garibaldi, F., Gasparian, A., Gilad, S., Gilman, R., Glamazdin, A., Glashausser, C., Gomez, J., Gorbenko, V., Gorringe, T., W. Hersman, F., Holmes, R., Holtrop, M., D'Hose, N., Howell, C., M. Huber, G., E. Hyde-Wright, C., Iodice, M., Jaminion, S., K. Jones, M., Joo, K., Jutier, C., Kahl, W., Kato, S., Kelly, J.J., Kerhoas, S., Khandaker, M., Khayat, M., Kino, K., Korsch, W., Kramer, L., S. Kumar, K., Kumbartzki, G., Laveissière, G., Leone, A., LeRose, J.J., Levchuk, L., A. Lindgren, R., Liyanage, N., J. Lolos, G., W. Lourie, R., Madey, R., Maeda, K., Malov, S., M. Manley, D., J. Margaziotis, D., Markowitz, P., Martino, J., S. Mccarthy, J., McCormick, K., McIntyre, J., L. J. Van Der Meer, R., Meziani, Z.-E., Michaels, R., Mougey, J., Nanda, S., Neyret, D., A. J. M. Offermann, E., Papandreou, Z., F. Perdrisat, C., Perrino, R., G. Petratos, G., Platchkov, S., Pomatsalyuk, R., L. Prout, D., A. Punjabi, V., Pussieux, T., Quéméner, G., D. Ransome, R., Ravel, O., Roblin, Y., Roche, R., Rowntree, D., A. Rutledge, G., M. Rutt, P., Saha, A., Saito, T., J. Sarty, A., Serdarevic-Offermann, A., P. Smith, T., Soldi, A., Sorokin, P., Souder, P., Suleiman, R., A. Templon, J., Terasawa, T., Todor, L., Tsubota, H., Ueno, H., E. Ulmer, P., M. Urciuoli, G., Vernin, P., Van Verst, S., Vlahovic, B., Voskanyan, H., W. Watson, J., B. Weinstein, L., Wijesooriya, K., Wojtsekhowski, B., G. Zainea, D., Zeps, V., 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), 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), 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), 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
Nuclear Theory, 25.30.Fj, 24.70.+s, 27.20.+n, FOS: Physical sciences, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

The physics program in Hall A at Jefferson Lab commenced in the summer of 1997 with a detailed investigation of the 16O(e,e'p) reaction in quasielastic, constant (q,w) kinematics at Q^2 ~ 0.8 (GeV/c)^2, q ~ 1 GeV/c, and w ~ 445 MeV. Use of a self-calibrating, self-normalizing, thin-film waterfall target enabled a systematically rigorous measurement. Differential cross-section data for proton knockout were obtained for 0 < Emiss < 120 MeV and 0 < pmiss < 350 MeV/c. These results have been used to extract the ALT asymmetry and the RL, RT, RLT, and RL+TT effective response functions. Detailed comparisons of the data with Relativistic Distorted-Wave Impulse Approximation, Relativistic Optical-Model Eikonal Approximation, and Relativistic Multiple-Scattering Glauber Approximation calculations are made. The kinematic consistency of the 1p-shell normalization factors extracted from these data with respect to all available 16O(e,e'p) data is examined. The Q2-dependence of the normalization factors is also discussed., 43 pages, 25 figures, all known typos now corrected

Published
2004

10. Q$^2$ Dependence of Quadrupole Strength in the $\gamma$*p --> $\Delta^+$(1232) --> p$\pi^0$ Transition

Author

Joo, K., C. Smith, L., D. Burkert, V., Minehart, R., G. Aznauryan, I., Elouadrhiri, L., Stepanyan, S., S. Adams, G., J. Amaryan, M., Anciant, E., Anghinolfi, M., S. Armstrong, D., Asavapibhop, B., Audit, G., Auger, T., Avakian, H., Barrow, S., Bagdasaryan, H., Battaglieri, M., Beard, K., Bektasoglu, M., Bertozzi, W., Bianchi, N., S. Biselli, A., Boiarinov, S., E. Bonner, B., K. Brooks, W., R. Calarco, J., P. Capitani, G., S. Carman, D., Carnahan, B., L. Cole, P., Coleman, A., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Cummings, J., De Sanctis, E., De Vita, R., V. Degtyarenko, P., Demirchyan, R.A., Denizli, H., C. Dennis, L., Deppman, A., V. Dharmawardane, K., S. Dhuga, K., Djalali, C., E. Dodge, G., Doughty, D., Dragovitsch, P., Dugger, M., Dytman, S., Eckhause, M., V. Efremenko, Y., Egiyan, H., S. Egiyan, K., Farhi, L., J. Feuerbach, R., Ficenec, J., Fissum, K., Forest, T.A., Funsten, H., Gai, M., B. Gavrilov, V., Gilad, S., P. Gilfoyle, G., L. Giovanetti, K., Girard, Pascal, A. Griffioen, K., Guidal, M., Guillo, M., Gyurjyan, V., Hancock, D., Hardie, J., Heddle, D., Heisenberg, J., W. Hersman, F., Hicks, K., S. Hicks, R., Holtrop, M., E. Hyde-Wright, C., M. Ito, M., Jenkins, D., H. Kelley, J., Khandaker, M., Y. Kim, K., Kim, W., Klein, A., J. Klein, F., Klusman, M., Kossov, M., Kuang, Y., E. Kuhn, S., M. Laget, J., Lawrence, D., Longhi, A., Loukachine, K., Lucas, M., W. Major, R., Manak, J.J., Marchand, C., K. Matthews, S., McAleer, S., W. C. Mcnabb, J., A. Mecking, B., D. Mestayer, M., Meyer, C.A., Mirazita, M., Miskimen, R., Muccifora, V., Mueller, J., S. Mutchler, G., Napolitano, J., Niculescu, G., Niczyporuk, B., A. Niyazov, R., S. Ohandjanyan, M., Opper, A., Patois, Y., A. Peterson, G., Philips, S., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., M. Preedom, B., W. Price, J., M. Qin, L., A. Raue, B., R. Reolon, A., Riccardi, G., Ricco, G., Ripani, M., G. Ritchie, B., Ronchetti, F., Rossi, P., Rowntree, D., D. Rubin, P., W. Salgado, C., Sanzone, M., Sapunenko, V., Sargsyan, M., A. Schumacher, R., G. Sharabian, Y., Shaw, J., M. Shuvalov, S., Skabelin, A., S. Smith, E., Smith, T., I. Sober, D., Spraker, M., Stoler, P., Taiuti, M., Taylor, S., Tedeschi, D., Thompson, R., Todor, L., Y. Tung, T., F. Vineyard, M., Vlassov, A., Weller, H., B. Weinstein, L., Welsh, R., P. Weygand, D., Whisnant, S., Witkowski, M., Wolin, E., Yegneswaran, A., Yun, J., Zhou, Z., Zhao, J., 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 CLAS

Subjects
Nuclear Theory, 13.60.Le, 13.40.Gp, 14.20.Gk, High Energy Physics::Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

Models of baryon structure predict a small quadrupole deformation of the nucleon due to residual tensor forces between quarks or distortions from the pion cloud. Sensitivity to quark versus pion degrees of freedom occurs through the Q2 dependence of the magnetic (M1+), electric (E1+), and scalar (S1+) multipoles in the gamma*p--Delta(+)--p pi(0) transition. We report new experimental values for the ratios E(1+)/M(1+) and S(1+)/M(1+) over the range Q2 = 0.4-1.8 GeV2, extracted from precision p(e,e(')p)pi(0) data using a truncated multipole expansion. Results are best described by recent unitary models in which the pion cloud plays a dominant role.

Published
2002

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

Author

Liyanage, N., Anderson, B. D., Aniol, K. A., Auerbach, L., Baker, F. T., Berthot, J., Bertozzi, W., Bertin, P. Y., Bimbot, L., Boeglin, W. U., Brash, E. J., Vincent Breton, Breuer, H., Burtin, E., Calarco, J. R., Cardman, L., Cates, G. D., Cavata, C., Chang, C. C., Chen, J. P., Cisbani, E., Dale, D. S., Leo, R., Deur, A., Diederich, B., Djawotho, P., Domingo, J., Doyle, B., Ducret, J. E., Epstein, M. B., Ewell, L. A., Finn, J. M., Fissum, K. G., Fonvieille, H., Frois, B., Frullani, S., Gao, J., Garibaldi, F., Gasparian, A., Gilad, S., Gilman, R., Glamazdin, A., Glashausser, C., Gomez, J., Gorbenko, V., Gorringe, T., Hersman, F. W., Holmes, R., Holtrop, M., Hose, N. D., Howell, C., Huber, G. M., Hyde-Wright, C. E., Iodice, M., Jager, C. W., Jaminion, S., Jones, M. K., Joo, K., Jutier, C., Kahl, W., Kato, S., Kelly, J. J., Kerhoas, S., Khandaker, M., Khayat, M., Kino, K., Korsch, W., Kramer, L., Kumar, K. S., Kumbartzki, G., Laveissiere, G., Leone, A., Lerose, J. J., Levchuk, L., Liang, M., Lindgren, R. A., Lolos, G. J., Lourie, R. W., Madey, R., Maeda, K., Malov, S., Manley, D. M., Margaziotis, D. J., Markowitz, P., Martino, J., Mccarthy, J. S., Mccormick, K., Mcintyre, J., Meer, R. L. J., Meziani, Z. E., Michaels, R., Mougey, J., Nanda, S., 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., Roblin, Y., Roche, R., Rowntree, D., Rutledge, G. A., Saha, A., Saito, T., Sarty, A. J., Serdarevic-Offermann, A., Smith, T. P., Soldi, A., Sorokin, P., Souder, P., Suleiman, R., Templon, J. A., Terasawa, T., Todor, L., Tsubota, H., Ueno, H., Ulmer, P. E., Urciuoli, G. M., Vernin, P., Verst, S., Vlahovic, B., Voskanian, H., Watson, J. W., Weinstein, L. B., Wijesooriya, K., Wilson, R., Wojtsekhowski, B., Zainea, D. G., Zeps, V., 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), 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
Nuclear Theory, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment
Abstract

We measured the cross section and response functions (R_L, R_T, and R_LT) for the 16O(e,e'p) reaction in quasielastic kinematics for missing energies 25 60 MeV and P_miss > 200 MeV/c, the cross section is relatively constant. Calculations which include contributions from pion exchange currents, isobar currents and short-range correlations account for the shape and the transversity but only for half of the magnitude of the measured cross section.

Published
2001

12. The quasielastic 2H(e,e'p)n reaction at high recoil momenta

Author

Ulmer, P. E., Aniol, K. A., Arenhoevel, H., Chen, J. -P., Chudakov, E., Crovelli, D., Finn, J. M., Fissum, K. G., Gayou, O., Gomez, J., Hansen, J. -O., de Jager, C. W., Jeschonnek, S., Jones, M. K., Kuss, M., LeRose, J. J., Liang, M., Lindgren, R. A., Malov, S., Meekins, D., Michaels, R., Mitchell, J., Perdrisat, C. F., Punjabi, V., Roche, R., Sabatie, F., Saha, A., Suleiman, R., Todor, L., and Wojtsekhowski, B. B.

Subjects
Nuclear Theory, Physics::Accelerator Physics, FOS: Physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

The 2H(e,e'p)n cross section was measured in Hall A of the Thomas Jefferson National Accelerator Facility (JLab) in quasielastic kinematics (x=0.96) at a four-momentum transfer squared, Q^2=0.67 (GeV/c)^2. The experiment was performed in fixed electron kinematics for recoil momenta from zero to 550 MeV/c. Though the measured cross section deviates by 1-2 sigma from a state-of-the-art calculation at low recoil momenta, it agrees at high recoil momenta where final state interactions (FSI) are predicted to be large., Comment: 4 pages, 1 figure, to be submitted to Phys. Rev. Lett

Published
2001
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13. Polarization transfer in the ${16}O$ ($\vec{e},e'\vec{p}$) $^{15}$N reaction

Author

Malov, S., Wijesooriya, K., Baker, F. T., Bimbot, L., Brash, E. J., Chang, C. C., Finn, J. M., Fissum, K. G., Gao, J., Gilman, R., Glashausser, C., Jones, M. K., Kelly, J. J., Kumbartzki, G., Liyanage, N., Mcintyre, J., Nanda, S., Perdrisat, C. F., Punjabi, V. A., Quéméner, G., Ransome, R. D., Rutt, P. M., Zainea, D. G., Anderson, B. D., Aniol, K. A., Auerbach, L., Berthot, J., Bertozzi, W., Bertin, P. Y., Boeglin, W. U., Vincent Breton, Breuer, H., Burtin, E., Calarco, J. R., Cardman, L., Cates, G. D., Cavata, C., Chen, J. P., Cisbani, E., Dale, D. S., Leo, R., Deur, A., Diederich, B., Djawotho, P., Domingo, J., Doyle, B., Ducret, J. E., Epstein, M. B., Ewell, L. A., Fleniken, J., Fonvieille, H., Frois, B., Frullani, S., Garibaldi, F., Gasparian, A., Gilad, S., Glamazdin, A., Gomez, J., Gorbenko, V., Gorringe, T., Griffioen, K., Hersman, F. W., Hines, J., Holmes, R., Holtrop, M., Hose, N. D., Howell, C., Huber, G. M., Hyde-Wright, C. E., Iodice, M., Jager, C. W., Jaminion, S., Joo, K., Jutier, C., Kahl, W., Kato, S., Kerhoas, S., Khandaker, M., Khayat, M., Kino, K., Korsch, W., Kramer, L., Kumar, K. S., Laveissiere, G., Leone, A., Lerose, J. J., Levchuk, L., Liang, M., Lindgren, R. A., Lolos, G. J., Lourie, R. W., Madey, R., Maeda, K., Manley, D. M., Margaziotis, D. J., Markowitz, P., Marroncle, J., Martino, J., Mccarthy, J. S., Mccormick, K., Meer, R. L. J., Meziani, Z. E., Michaels, R., Mougey, J., Neyret, D., Offermann, E. A. J. M., Papandreou, Z., Perrino, R., Petratos, G. G., Platchkov, S., Pomatsalyuk, R., Prout, D. L., Pussieux, T., Ravel, O., Roblin, Y., Roche, R., Rowntree, D., Rutledge, G. A., Saha, A., Saito, T., Sarty, A. J., Serdarevic-Offermann, A., Smith, T. P., Soldi, A., Sorokin, P., Souder, P., Suleiman, R., Templon, J. A., Terasawa, T., Todor, L., Tsubota, H., Ueno, H., Ulmer, P. E., Urciuoli, G. M., Vernin, P., Verst, S., Vlahovic, B., Voskanian, H., Watson, J. W., Weinstein, L. B., Wilson, R., Wojtsekhowski, B., Zeps, V., Zhao, J., Zhou, Z. 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
Nuclear Theory, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment
Abstract

The first (e,e'p) polarization transfer measurements on a nucleus heavier than deuterium have been carried out at Jefferson Laboratory. Transverse and longitudinal components of the polarization of protons ejected in the reaction 16O(e,e'p) were measured in quasielastic perpendicular kinematics at a Q^2 of 0.8 (GeV/c)^2. The data are in good agreement with state of the art calculations, but do not exclude possible changes in the ratio of the electric to magnetic form factors of the nucleon in the nuclear medium at the level of recent theoretical predictions.

Published
2000

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

Author

Alexa, L. C., Anderson, B. D., Aniol, K. A., Arundell, K., Auerbach, L., Baker, F. T., Berthot, J., Bertin, P. Y., Bertozzi, W., Bimbot, L., Boeglin, W. U., Brash, E. J., Vincent Breton, 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., Degrande, N., Leo, R., Deur, A., Hose, N. D., Diederich, B., Domingo, J. J., Epstein, M. B., Ewell, L. A., Finn, J. M., Fissum, K. G., Fonvieille, H., Frois, B., Frullani, S., Gao, H., Gao, J., Garibaldi, F., Gasparian, A., Gilad, S., Gilman, R., Glamazdin, A., Glashausser, C., Gomez, J., Gorbenko, V., Hansen, J. O., Holmes, R., Holtrop, M., Howell, C., Huber, G. M., Hyde-Wright, C., Iodice, M., Jager, C. W., Jaminion, S., Jardillier, J., Jones, M. K., Jutier, C., Kahl, W., Kato, S., Katramatou, A. T., Kelly, J. J., Kerhoas, S., Ketikian, A., Khayat, M., Kino, K., Kramer, L. H., Kumar, K. S., Kumbartzki, G., Kuss, M., Laveissiere, G., Leone, A., Le Rose, J. J., Liang, M., Lindgren, R. A., Liyanage, N., Lolos, G. J., Lourie, R. W., Madey, R., Maeda, K., Malov, S., Manley, D. M., Margaziotis, D. J., Markowitz, P., Marroncle, J., Martino, J., Martoff, C. J., Mccormick, K., Mcintyre, J., Meer, R. L. J., Mehrabian, S., 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., Roblin, Y., Rowntree, D., Rutledge, G., Rutt, P. M., Saha, A., Saito, T., Sarty, A. J., Serdarevic, A., Smith, T., Soldi, K., Sorokin, P., Souder, P. A., Suleiman, R., Templon, J. A., Terasawa, T., Todor, L., Tsubota, H., Ueno, H., Ulmer, P. E., Urciuoli, G. M., Hoorebeke, L., Vernin, P., Vlahovic, B., Voskanian, H., 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), 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
High Energy Physics::Lattice, Nuclear Theory, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Nuclear Experiment
Abstract

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

Published
1999

15. Inclusive hadron photoproduction from longitudinally polarized protons and deuterons

Author

Anthony, P.L., Arnold, R.G., Averett, T., Band, H.R., Berisso, M.C., Borel, H., Bosted, P.E., Bultmann, S.L., Buenerd, M., Chupp, T., Churchwell, S., Court, G.R., Crabb, D., Day, D., Decowski, P., DePietro, P., Erbacher, R., Erickson, R., Feltham, A., Fonvieille, H., Frlez, E., Gearhart, R., Ghazikhanian, V., Gomez, J., Griffioen, K.A., Harris, C., Houlden, M.A., Hughes, E.W., Hyde-Wright, C.E., Igo, G., Incerti, S., Jensen, J., Johnson, J.R., King, P.M., Kolomensky, Yu.G., Kuhn, S.E., Lindgren, R., Lombard-Nelsen, R.M., Marroncle, J., McCarthy, J., McKee, P., Meyer, W., Mitchell, G.S., Mitchell, J., Olson, M., Penttila, S., Peterson, G.A., Petratos, G.G., Pitthan, R., Pocanic, D., Prepost, R., Prescott, C., Qin, L.M., Raue, B.A., Reyna, D., Rochester, L.S., Rock, S., Rondon-Aramayo, O., Sabatie, F., Sick, I., Smith, T., Sorrell, L., Staley, F., Stuart, L.M., Szalata, Z., Terrien, Y., Tobias, A., Todor, L., Toole, T., Trentalange, S., Walz, D., Welsh, R.C., Wesselmann, F.R., Wright, T.R., Young, C.C., Zeier, M., Zhu, H., Zihlmann, 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 E155

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

We report measurements of the asymmetry A_parallel for inclusive hadron production on longitudinally polarized proton and deuteron targets by circularly polarized photons. The photons were produced via internal and external bremsstrahlung from an electron beam of 48.35 GeV. Asymmetries for both positive and negative signed hadrons, and a subset of identified pions, were measured in the momentum range 10

Published
1999

16. Extraction of the neutron magnetic form factor from quasielastic 3He(e,e') at Q2=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, Hiroyuki, Kievsky, A, Kominis, I, Korsch, W, Kramer, K, Kumabartzki, G, Kuss, M, Lakuriqi, E, Liang, M, Liyanage, N, LeRose, J, Malov, S, Margaziotis, D.J., Martin, J.W., McCormick, K, Mckeown, R.D., Mcllhany, K, Meziani, Z-E, Michaels, R, Miller, W, Mitchell, J, Nanda, S, Pace, E, Pavilin, T, Petratos, G.G, Pomatsalyuk, R.I, Pripstein, D, Prout, D, Ransome, R.D., Roblin, Y, Rvachev, M, Saha, A, Salme, 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, W, Yeh, J, and Zolnierczuk, P

Subjects
Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment
Abstract

We have measured the transverse asymmetry AT' in the quasielastic 3He(e,e') process with high precision at Q2 values from 0.1 to 0.6 (GeV/c)2. The neutron magnetic form factor G was extracted at Q2 values of 0.1 and 0.2 (GeV/c)2 using a nonrelativistic Faddeev calculation which includes both final-state interactions (FSI) and meson-exchange currents (MEC). Theoretical uncertainties due to the FSI and MEC effects were constrained with a precision measurement of the spin-dependent asymmetry in the threshold region of 3He(e,e'). We also extracted the neutron magnetic form factor Gm at Q2 values of 0.3 to 0.6 (GeV/c)2 based on plane wave impulse approximation calculations.

Published
2007

17. Moments of the spin structure functions g1p and g1d for 0.05<Q2<3.0 GeV2

Author

Prok, Y., Bosted, P., Burkert, V.D., Deur, A., Dharmawardane, K.V., Dodge, G.E., Griffioen, K.A., Kuhn, S.E., Minehart, R., Adams, G., Amaryan, M.J., Anghinolfi, M., Asryan, G., Audit, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J.P., Baltzell, N.A., Barrow, S., Battaglieri, M., Beard, K., Bedlinskiy, I., Bektasoglu, M., Bellis, M., Benmouna, N., Berman, B.L., Biselli, A.S., Blaszczyk, L., Boiarinov, S., Bonner, B.E., Bouchigny, S., Bradford, R., Branford, D., Briscoe, W.J., Brooks, W.K., Bültmann, S., Butuceanu, C., Calarco, J.R., Careccia, S.L., Carman, D.S., Casey, L., Cazes, A., Chen, S., Cheng, L., Cole, P.L., Collins, P., Coltharp, P., Cords, D., Corvisiero, P., Crabb, D., Crede, V., Cummings, J.P., Dale, D., Dashyan, N., De Masi, R., De Vita, R., De Sanctis, E., Degtyarenko, P.V., Denizli, H., Dennis, L., Dhuga, K.S., Dickson, R., Djalali, C., Doughty, D., Dugger, M., Dytman, S., Dzyubak, O.P., Egiyan, H., Egiyan, K.S., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fatemi, R., Fedotov, G., Feldman, G., Fersh, R.G., Feuerbach, R.J., Forest, T.A., Fradi, A., Funsten, H., Garçon, M., Gavalian, G., Gevorgyan, N., Gilfoyle, G.P., Giovanetti, K.L., Girod, F.X., Goetz, J.T., Golovatch, E., Gothe, R.W., Guidal, M., Guillo, M., Guler, N., Guo, L., Gyurjyan, V., Hadjidakis, C., Hafidi, K., Hakobyan, H., Hanretty, C., Hardie, J., Hassall, N., Heddle, D., Hersman, F.W., Hicks, K., Hleiqawi, I., Holtrop, M., Huertas, M., Hyde-Wright, C.E., Ilieva, Y., Ireland, D.G., Ishkhanov, B.S., Isupov, E.L., Ito, M.M., Jenkins, D., Jo, H.S., Johnstone, J.R., Joo, K., Juengst, H.G., Kalantarians, N., Keith, C.D., Kellie, J.D., Khandaker, M., Kim, K.Y., Kim, K., Kim, W., Klein, A., Klein, F.J., Klusman, M., Kossov, M., Krahn, Z., Kramer, L.H., Kubarovsky, V., Kuhn, J., Kuleshov, S.V., Kuznetsov, V., Lachniet, J., Laget, J.M., Langheinrich, J., Lawrence, D., Li, Ji, Lima, A.C.S., Livingston, K., Lu, H.Y., Lukashin, K., MacCormick, M., Marchand, C., Markov, N., Mattione, P., McAleer, S., McKinnon, B., McNabb, J.W.C., Mecking, B.A., Mestayer, M.D., Meyer, C.A., Mibe, T., Mikhailov, K., Mirazita, M., Miskimen, R., Mokeev, V., Morand, L., Moreno, B., Moriya, K., Morrow, S.A., Moteabbed, M., Mueller, J., Munevar, E., Mutchler, G.S., Nadel-Turonski, P., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., Niczyporuk, B.B., Niroula, M.R., Niyazov, R.A., Nozar, M., O'Rielly, G.V., Osipenko, M., Ostrovidov, A.I., Park, K., Pasyuk, E., Paterson, C., Pereira, S. Anefalos, Philips, S.A., Pierce, J., Pivnyuk, N., Pocanic, D., Pogorelko, O., Popa, I., Pozdniakov, S., Preedom, B.M., Price, J.W., Procureur, S., Protopopescu, D., Qin, L.M., Raue, B.A., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Rosner, G., Rossi, P., Rowntree, D., Rubin, P.D., Sabatié, F., Salamanca, J., Salgado, C., Santoro, J.P., Sapunenko, V., Schumacher, R.A., Seely, M.L., Serov, V.S., Sharabian, Y.G., Sharov, D., Shaw, J., Shvedunov, N.V., Skabelin, A.V., Smith, E.S., Smith, L.C., Sober, D.I., Sokhan, D., Stavinsky, A., Stepanyan, S.S., Stepanyan, S., Stokes, B.E., Stoler, P., Strakovsky, I.I., Strauch, S., Suleiman, R., Taiuti, M., Tedeschi, D.J., Tkabladze, A., Tkachenko, S., Todor, L., Ungaro, M., Vineyard, M.F., Vlassov, A.V., Watts, D.P., Weinstein, L.B., Weygand, D.P., Williams, M., Wolin, E., Wood, M.H., Yegneswaran, A., Yun, J., Zana, L., Zhang, J., Zhao, B., and Zhao, Z.W.

Subjects
Nucleon structure, Spin structure functions, Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment, Chiral Perturbation Theory
Abstract

The spin structure functions g1 for the proton and the deuteron have been measured over a wide kinematic range in x and Q2 using 1.6 and 5.7 GeV longitudinally polarized electrons incident upon polarized NH3 and ND3 targets at Jefferson Lab. Scattered electrons were detected in the CEBAF Large Acceptance Spectrometer, for 0.05

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18. Electron Scattering From High-Momentum Neutrons in Deuterium

Author

J. Donnelly, G. Asryan, O. P. Dzyubak, R. A. Niyazov, Latifa Elouadrhiri, Shifeng Chen, R. C. Minehart, C. A. Meyer, N. A. Baltzell, B. B. Niczyporuk, Michael Wood, G. V. Fedotov, M. Battaglieri, V. S. Serov, N. Pivnyuk, K. A. Griffioen, R. Fatemi, J. R. Calarco, J. Napolitano, P. Corvisiero, A. Tkabladze, S. Bültmann, R. Bradford, L. C. Dennis, A. V. Vlassov, H. Avakian, D. P. Weygand, G. E. Dodge, S. A. Morrow, J. T. Goetz, Federico Ronchetti, J. Kuhn, P. V. Degtyarenko, W. Kim, J. P. Santoro, E. Pasyuk, S. A. Dytman, Cynthia Marie Hadjidakis, G. Niculescu, P. Ambrozewicz, Alexei V. Klimenko, K. S. Egiyan, K. Park, Chaden Djalali, V. P. Kubarovsky, O. Pogorelko, Michael Dugger, H. O. Funsten, P. Coltharp, I. Niculescu, Barry Ritchie, K. Mikhailov, Elton Smith, D. Lawrence, G. Ricco, A. Cazes, Bernhard Mecking, M. Bektasoglu, K. V. Dharmawardane, J. P. Cummings, M. M. Ito, Sylvain Bouchigny, G. S. Mutchler, P. Rossi, M. Anghinolfi, G. Rosner, R. A. Schumacher, James Mueller, H. Denizli, R. Nasseripour, P. Eugenio, S. Niccolai, M. Kossov, M. Taiuti, Friedrich Klein, C. I O Gordon, Brian Raue, P. Stoler, Y. G. Sharabian, G. Riccardi, S. Mehrabyan, R. DeVita, J. W C McNabb, L. Morand, S. Stepanyan, A. V. Skabelin, M. Bellis, J. Hardie, K. Hicks, M. Guillo, J. Pierce, G. Gavalian, Avraham Klein, V. Sapunenko, Dinko Pocanic, H. G. Juengst, E. De Sanctis, M. Osipenko, J. J. Melone, S. Tkachenko, N. Benmouna, M. Ripani, D. I. Sober, S. E. Kuhn, A.V. Stavinsky, C. Tur, D. J. Tedeschi, L. C. Smith, I. Bedlinskiy, W. K. Brooks, B. S. Ishkhanov, C. Butuceanu, B. E. Stokes, G. S. Adams, U. Thoma, K. Joo, E. Wolin, J. P. Ball, Y. Prok, D. G. Crabb, N. Dashyan, J. D. Kellie, R. G. Fersch, P. L. Cole, P. Nadel-Turonski, Tsutomu Mibe, J. Lachniet, R. S. Hakobyan, J. Langheinrich, S. S. Stepanyan, Daniel S. Carman, C. E. Hyde-Wright, Sergey Kuleshov, M. Nozar, M. Guidal, M. Holtrop, Victor Mokeev, L. Guo, M. Ungaro, D. Cords, A. Yegneswaran, V. Gyurjyan, J. Zhang, H. Bagdasaryan, D. Doughty, G. V. O'Rielly, D. G. Jenkins, S. McAleer, R. W. Gothe, F. X. Girod, I. Hleiqawi, S. L. Careccia, B. Zhao, K. L. Giovanetti, Atilla Gonenc, Larry Weinstein, F. W. Hersman, J. W. Price, M. Khandaker, N. Baillie, Y. Ilieva, Gerard Gilfoyle, S. Strauch, K. Livingston, H. Egiyan, R. A. Miskimen, B. McKinnon, N. Guler, S. Barrow, D. Branford, L. Todor, D. Protopopescu, M. Mirazita, J. M. Laget, S. Pozdniakov, M. Garçon, A. I. Ostrovidov, D. G. Ireland, Volker D. Burkert, A. S. Biselli, R. J. Feuerbach, Laird Kramer, V. Batourine, F. Sabatié, C. Paterson, Michael Vineyard, Ji Li, M. D. Mestayer, Michael L. Williams, S. Boiarinov, B. M. Preedom, Lorenzo Zana, H. S. Jo, C. Salgado, 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), CLAS, Klimenko, AV, Kuhn, SE, Butuceanu, C, Egiyan, KS, Griffioen, KA, Adams, G, Ambrozewicz, P, Anghinolfi, M, Asryan, G, Avakian, H, Bagdasaryan, H, Baillie, N, Ball, JP, Baltzell, NA, Barrow, S, Batourine, V, Battaglieri, M, Bedlinskiy, I, Bektasoglu, M, Bellis, M, Benmouna, N, Biselli, AS, Bouchigny, S, Boiarinov, S, Bradford, R, Branford, D, Brooks, WK, Bultmann, S, Burkert, VD, Calarco, JR, Careccia, SL, Carman, DS, Cazes, A, Chen, S, Cole, PL, Coltharp, P, Cords, D, Corvisiero, P, Crabb, D, Cummings, JP, Dashyan, NB, DeVita, R, Sanctis, ED, Degtyarenko, PV, Denizli, H, Dennis, L, Dharmawardane, KV, Djalali, C, Dodge, GE, Donnelly, J, Doughty, D, Dugger, M, Dytman, S, Dzyubak, OP, Egiyan, H, Elouadrhiri, L, Eugenio, P, Fatemi, R, Fedotov, G, Fersch, RG, Feuerbach, RJ, Funsten, H, Garcon, M, Gavalian, G, Gilfoyle, GP, Giovanetti, KL, Girod, FX, Goetz, JT, Gonenc, A, Gordon, CIO, Gothe, RW, Guidal, M, Guillo, M, Guler, N, Guo, L, Gyurjyan, V, Hadjidakis, C, Hakobyan, RS, Hardie, J, Hersman, FW, Hicks, K, Hleiqawi, I, Holtrop, M, Hyde-Wright, CE, Ilieva, Y, Ireland, DG, Ishkhanov, BS, Ito, MM, Jenkins, D, Jo, HS, Joo, K, Juengst, HG, Kellie, JD, Khandaker, M, Kim, W, Klein, A, Klein, FJ, Kossov, M, Kramer, LH, Kubarovsky, V, Kuhn, J, Kuleshov, SV, Lachniet, J, Laget, JM, Langheinrich, J, Lawrence, D, Li, J, Livingston, K, McAleer, S, McKinnon, B, McNabb, JWC, Mecking, BA, Mehrabyan, S, Melone, JJ, Mestayer, MD, Meyer, CA, Mibe, T, Mikhailov, K, Minehart, R, Mirazita, M, Miskimen, R, Mokeev, V, Morand, L, Morrow, SA, Mueller, J, Mutchler, GS, Nadel-Turonski, P, Napolitano, J, Nasseripour, R, Niccolai, S, Niculescu, G, Niculescu, I, Niczyporuk, BB, Niyazov, RA, Nozar, M, O'Rielly, GV, Osipenko, M, Ostrovidov, AI, Park, K, Pasyuk, E, Paterson, C, Pierce, J, Pivnyuk, N, Pocanic, D, Pogorelko, O, Pozdniakov, S, Preedom, BM, Price, JW, Prok, Y, Protopopescu, D, Raue, BA, Riccardi, G, Ricco, G, Ripani, M, Ritchie, BG, Ronchetti, F, Rosner, G, Rossi, P, Sabatie, F, Salgado, C, Santoro, JP, Sapunenko, V, Schumacher, RA, Serov, VS, Sharabian, YG, Skabelin, AV, Smith, ES, Smith, LC, Sober, DI, Stavinsky, A, Stepanyan, SS, Stepanyan, S, Stokes, BE, Stoler, P, Strauch, S, Taiuti, M, Tedeschi, DJ, Thoma, U, Tkabladze, A, Tkachenko, S, Todor, L, Tur, C, Ungaro, M, Vineyard, MF, Vlassov, AV, Weinstein, LB, Weygand, DP, Williams, M, Wolin, E, Wood, MH, Yegneswaran, A, Zana, L, Zhang, J, Zhao, B, Sakarya Üniversitesi/Fen-Edebiyat Fakültesi/Fizik Bölümü, and Bektaşoğlu, Mehmet

Subjects
Nuclear reaction, Nuclear and High Energy Physics, 24.85.+p, 25.30.-c, 21.45.+v, Proton, Hadron, Nuclear Theory, FOS: Physical sciences, off-shell, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], PROTON, 01 natural sciences, FINAL-STATE INTERACTION, NUCLEI, PROTON, TARGETS, DEPENDENCE, RATIO, IRON, DIS, FIT, FINAL-STATE INTERACTION, Nuclear physics, RATIO, neutron, TARGETS, DEPENDENCE, 0103 physical sciences, Neutron, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, deuterium, Physics, DIS, NUCLEI, 010308 nuclear & particles physics, IRON, Momentum transfer, FIT, Deuterium, structure functions, Atomic physics, Nucleon, Lepton
Abstract

We report results from an experiment measuring the semi-inclusive reaction $d(e,e'p_s)$ where the proton $p_s$ is moving at a large angle relative to the momentum transfer. If we assume that the proton was a spectator to the reaction taking place on the neutron in deuterium, the initial state of that neutron can be inferred. This method, known as spectator tagging, can be used to study electron scattering from high-momentum (off-shell) neutrons in deuterium. The data were taken with a 5.765 GeV electron beam on a deuterium target in Jefferson Laboratory's Hall B, using the CLAS detector. A reduced cross section was extracted for different values of final-state missing mass $W^{*}$, backward proton momentum $\vec{p}_{s}$ and momentum transfer $Q^{2}$. The data are compared to a simple PWIA spectator model. A strong enhancement in the data observed at transverse kinematics is not reproduced by the PWIA model. This enhancement can likely be associated with the contribution of final state interactions (FSI) that were not incorporated into the model. A ``bound neutron structure function'' $F_{2n}^{eff}$ was extracted as a function of $W^{*}$ and the scaling variable $x^{*}$ at extreme backward kinematics, where effects of FSI appear to be smaller. For $p_{s}>400$ MeV/c, where the neutron is far off-shell, the model overestimates the value of $F_{2n}^{eff}$ in the region of $x^{*}$ between 0.25 and 0.6. A modification of the bound neutron structure function is one of possible effects that can cause the observed deviation., 33 pages RevTeX, 9 figures, to be submitted to Phys. Rev. C. Fixed 1 Reference

Published
2005

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