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251. MEASUREMENT OF DEEPLY VIRTUAL COMPTON SCATTERING WITH A POLARIZED PROTON TARGET

Author: B. E. Bonner, H. Avakian, Marco A. Huertas, D. Doughty, Sylvain Bouchigny, Daniel S. Carman, P. Rossi, S. Barrow, W. J. Briscoe, V. Batourine, C. E. Hyde-Wright, S. A. Dytman, P. Nadel-Turonski, Tsutomu Mibe, Y. Ilieva, B. Carnahan, Sergey Kuleshov, Ji Li, M. Bektasoglu, E. Wolin, M. Ripani, M. Nozar, R. J. Feuerbach, P. Coltharp, A. V. Vlassov, M. D. Mestayer, J. Langheinrich, S. S. Stepanyan, E. Pasyuk, S. A. Philips, M. Khandaker, E. L. Isupov, V. Sapunenko, J. Kuhn, B. McKinnon, J. P. Ball, Y. Prok, M. M. Ito, Michael L. Williams, J. Shaw, Michael Wood, S. Strauch, A. I. Ostrovidov, A. C S Lima, L. Todor, S. Boiarinov, K. Hafidi, D. Protopopescu, Friedrich Klein, D. J. Tedeschi, S. Pozdniakov, M. Garçon, B. L. Berman, H. Y. Lu, D. Branford, M. Guidal, R. W. Gothe, D. G. Ireland, D. G. Crabb, L. M. Qin, Hall Crannell, V. S. Serov, M. Mirazita, J. M. Laget, A. Yegneswaran, Volker D. Burkert, A. S. Biselli, K. Y. Kim, G. Rosner, K. Park, M. Bellis, R. Nasseripour, M. Holtrop, C. Paterson, R. Suleiman, G. S. Mutchler, K.H. Hicks, D. P. Watts, H. Egiyan, N. A. Baltzell, M. Klusman, Michael Vineyard, M. Osipenko, F. Sabatié, Laird Kramer, K. A. Griffioen, B. E. Stokes, P. Stoler, B. M. Preedom, N. Markov, V. Crede, G. S. Adams, K. Beard, L. C. Smith, M. Amarian, Lorenzo Zana, J. P. Santoro, B. S. Ishkhanov, P. Eugenio, Federico Ronchetti, V. P. Kubarovsky, J. R. Calarco, Kalvir S. Dhuga, Nikolay Shvedunov, H. Hakobyan, R. A. Schumacher, M. Taiuti, H. S. Jo, W. Kim, G. Niculescu, Gerard Gilfoyle, M. R. Niroula, M. MacCormick, I. Hleiqawi, S. L. Careccia, J. D. Kellie, U. Thoma, Gerald Feldman, C. Salgado, N. Guler, S. Niccolai, M. Battaglieri, P. Collins, N. Natasha, E. De Sanctis, K. L. Giovanetti, S. Bültmann, L. Morand, Larry Weinstein, T. A. Forest, D. I. Sober, R. Fatemi, S. Stepanyan, N. Baillie, J. Hardie, K. S. Egiyan, R. Bradford, K. Lukashin, J. Pierce, Avraham Klein, B. Zhao, G. E. Dodge, E. Golovatch, K. Mikhailov, P. V. Degtyarenko, P. Bosted, I. Niculescu, D. Lawrence, A. Cazes, Maryam Moteabbed, Bernhard Mecking, R. De Masi, F. W. Hersman, C. D. Keith, K. V. Dharmawardane, S. Tkachenko, J. Donnelly, G. Asryan, O. P. Dzyubak, R. A. Niyazov, Kwangsoo Kim, G. Riccardi, B. A. Raue, Cynthia Marie Hadjidakis, Chaden Djalali, C. Butuceanu, Michael Dugger, H. O. Funsten, P. Corvisiero, H. G. Juengst, G. Gavalian, H. Denizli, N. Benmouna, A.V. Stavinsky, I. Bedlinskiy, A. V. Skabelin, Marc Vanderhaeghen, Barry Ritchie, Victor Mokeev, L. Guo, M. Ungaro, Latifa Elouadrhiri, K. Joo, R. C. Minehart, C. A. Meyer, J. Yun, D. Cords, G. V. Fedotov, D. P. Weygand, J. Zhang, M. Guillo, H. Bagdasaryan, I. I. Strakovsky, A. Deur, W. K. Brooks, J. Lachniet, A. Tkabladze, D. Rowntree, G. V. O'Rielly, R. S. Hakobyan, L. El Fassi, Z. W. Zhao, D. G. Jenkins, B. B. Niczyporuk, P. L. Cole, S. McAleer, F. X. Girod, N. Pivnyuk, D. Heddle, J. Napolitano, Giovanni Ricco, Atilla Gonenc, J. W. Price, O. Pogorelko, R. Miskimen, R. DeVita, J. W C McNabb, S. A. Morrow, P. Ambrozewicz, Shifeng Chen, J. P. Cummings, M. Kossov, I. Popa, J. T. Goetz, E. Polli, V. Gyurjyan, Dinko Pocanic, S. E. Kuhn, C. Tur, Elton Smith, M. Anghinolfi, James Mueller, P. D. Rubin, Y. G. Sharabian, K. Livingston, L. C. Dennis, 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), CEA- Saclay (CEA), 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: Photon, Proton, Nuclear Theory, media_common.quotation_subject, General Physics and Astronomy, FOS: Physical sciences, Parton, Electron, 01 natural sciences, Asymmetry, High Energy Physics - Experiment, Nuclear physics, Nuclear Theory (nucl-th), High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), GENERALIZED PARTON DISTRIBUTIONS, CLAS, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, NUCLEON, Spin-½, media_common, Physics, 010308 nuclear & particles physics, Compton scattering, High Energy Physics - Phenomenology, High Energy Physics::Experiment, GENERALIZED PARTON DISTRIBUTIONS, NUCLEON, CLAS, 13.60.Fz, 13.60.Hb, 14.20.Dh, Nucleon
Abstract: The longitudinal target-spin asymmetry A_UL for the exclusive electroproduction of high energy photons was measured for the first time in p(e,e'p\gamma). The data have been accumulated at Jefferson Lab with the CLAS spectrometer using 5.7 GeV electrons and a longitudinally polarized NH_3 target. A significant azimuthal angular dependence was observed, resulting from the interference of the Deeply Virtual Compton Scattering and Bethe-Heitler processes. The amplitude of the sin(phi) moment is 0.252 +/- 0.042(stat) +/- 0.020(sys). Theoretical calculations are in good agreement with the magnitude and the kinematic dependence of the target-spin asymmetry, which is sensitive to the generalized parton distributions H and H-tilde., Comment: Modified text slightly, added references
Published: 2006

252. MEASUREMENT OF THE N ---> DELTA+(1232) TRANSITION AT HIGH MOMENTUM TRANSFER BY PI0 ELECTROPRODUCTION

Author: M, Ungaro, P, Stoler, I, Aznauryan, V D, Burkert, K, Joo, L C, Smith, G, Adams, M, Amarian, P, Ambrozewicz, M, Anghinolfi, G, Asryan, G, Audit, H, Avakian, H, Bagdasaryan, J P, Ball, N A, Baltzell, S, Barrow, V, Batourine, M, Battaglieri, I, Bedliski, M, Bektasoglu, M, Bellis, N, Benmouna, B L, Berman, A S, Biselli, B E, Bonner, S, Bouchigny, S, Boiarinov, R, Bradford, D, Branford, W J, Briscoe, W K, Brooks, S, Bültmann, C, Butuceanu, J R, Calarco, S L, Careccia, D S, Carman, A, Cazes, S, Chen, P L, Cole, P, Coltharp, D, Cords, P, Corvisiero, D, Crabb, J P, Cummings, E De, Sanctis, R, Devita, P V, Degtyarenko, H, Denizli, L, Dennis, A, Deur, K V, Dharmawardane, C, Djalali, G E, Dodge, J, Donnelly, D, Doughty, M, Dugger, S, Dytman, O P, Dzyubak, H, Egiyan, K S, Egiyan, L, Elouadrhiri, P, Eugenio, R, Fatemi, G, Fedotov, G, Feldman, R J, Feuerbach, H, Funsten, M, Garçon, G, Gavalian, G P, Gilfoyle, K L, Giovanetti, F X, Girod, J, Goetz, C I O, Gordon, R W, Gothe, K A, Griffioen, M, Guidal, M, Guillo, N, Guler, L, Guo, V, Gyurjyan, C, Hadjidakis, R S, Hakobyan, J, Hardie, D, Heddle, F W, Hersman, I, Hleiqawi, M, Holtrop, K, Hicks, C E, Hyde-Wright, Y, Ilieva, D G, Ireland, B S, Ishkhanov, M M, Ito, D, Jenkins, H S, Jo, H G, Juengst, J D, Kellie, M, Khandaker, W, Kim, A, Klein, F J, Klein, A V, Klimenko, M, Kossov, L H, Kramer, V, Kubarovsky, J, Kuhn, S E, Kuhn, J, Lachniet, J M, Laget, J, Langheinrich, D, Lawrence, T, Lee, Ji, Li, K, Livingston, C, Marchand, N, Markov, S, McAleer, B, McKinnon, J W C, McNabb, B A, Mecking, S, Mehrabyan, J J, Melone, M D, Mestayer, C A, Meyer, K, Mikhailov, R, Minehart, M, Mirazita, R, Miskimen, V, Mokeev, L, Morand, S A, Morrow, J, Mueller, G S, Mutchler, J, Napolitano, R, Nasseripour, S, Niccolai, G, Niculescu, I, Niculescu, B B, Niczyporuk, M, Niroula, R A, Niyazov, M, Nozar, G V, O'rielly, M, Osipenko, A I, Ostrovidov, K, Park, E, Pasyuk, S A, Philips, N, Pivnyuk, D, Pocanic, O, Pogorelko, E, Polli, S, Pozdniakov, B M, Preedom, J W, Price, Y, Prok, D, Protopopescu, L M, Qin, B A, Raue, G, Riccardi, G, Ricco, M, Ripani, B G, Ritchie, F, Ronchetti, G, Rosner, P, Rossi, P D, Rubin, F, Sabatié, C, Salgado, J P, Santoro, V, Sapunenko, R A, Schumacher, V S, Serov, Y G, Sharabian, A V, Skabelin, E S, Smith, D I, Sober, A, Stavinsky, S S, Stepanyan, S, Stepanyan, B E, Stokes, I I, Strakovsky, S, Strauch, M, Taiuti, D J, Tedeschi, U, Thoma, A, Tkabladze, L, Todor, S, Tkachenko, C, Tur, M F, Vineyard, A V, Vlassov, L B, Weinstein, D P, Weygand, M, Williams, E, Wolin, M H, Wood, A, Yegneswaran, L, Zana, B, Zhang, J, Zhang, and B, Zhao
Abstract: We report a new measurement of the exclusive electroproduction reaction gamma(*)p--pi(0)p to explore the evolution from soft nonperturbative physics to hard processes via the Q(2) dependence of the magnetic (M(1+)), electric (E(1+)), and scalar (S(1+)) multipoles in the N--Delta transition. 9000 differential cross section data points cover W from threshold to 1.4 GeV/c(2), 4pi center-of-mass solid angle, and Q(2) from 3 to 6 GeV(2)/c(2), the highest yet achieved. It is found that the magnetic form factor G(M)(*) decreases with Q(2) more steeply than the proton magnetic form factor, the ratio E(1+)/M(1+) is small and negative, indicating strong helicity nonconservation, and the ratio S(1+)/M(1+) is negative, while its magnitude increases with Q(2).
Published: 2006

253. Measurement of the polarized structure functionσLT'for pion electroproduction in the Roper-resonance region

Author: H. Avakian, L. Elouadrhiri, V. Gyurjyan, J. Zhang, H. Bagdasaryan, A.V. Stavinsky, M. Osipenko, V. Batourine, E. Anciant, L. Guo, M. Ungaro, P. Stoler, R. Fatemi, D. J. Tedeschi, I. I. Strakovsky, A. Deur, A. V. Vlassov, K. Joo, N. A. Baltzell, R. A. Niyazov, J. Yun, D. Cords, A. Yegneswaran, M. Bektasoglu, R. A. Schumacher, B. Carnahan, F. Sabatié, W. J. Briscoe, E. Pasyuk, Thierry Auger, K. Beard, S. A. Dytman, I. Bedlinskiy, T. Lee, J. P. Cummings, W. K. Brooks, E. Wolin, K. A. Griffioen, S. Strauch, S. O. Nelson, K. Hicks, M. Kossov, Susan Taylor, R. A. Miskimen, B. McKinnon, H. G. Juengst, J. J. Manak, G. Gavalian, M. Khandaker, J. Lachniet, S. Bueltmann, J. Kuhn, Kalvir S. Dhuga, V. Mokeev, Shifeng Chen, T. A. Forest, J. P. Ball, M. Bellis, Patrick Girard, L. C. Maximon, J. Donnelly, G. Asryan, O. P. Dzyubak, N. Benmouna, M. Ripani, D. Rowntree, H. Egiyan, S. Stepanyan, J. Pierce, Avraham Klein, P. Coltharp, J. Shaw, Michael Wood, J. D. Kellie, M. Guillo, D. Doughty, P. Dragovitsch, Sylvain Bouchigny, Roy Thompson, P. Corvisiero, E. De Sanctis, P. Rossi, J. T. Goetz, D. Protopopescu, G. E. Dodge, E. Polli, D. I. Sober, D. Heddle, R. DeVita, S. Niccolai, Federico Ronchetti, D. G. Ireland, J. Hardie, V. Sapunenko, Dinko Pocanic, K. S. Egiyan, D. Branford, D. G. Crabb, S. Pozdniakov, M. Garçon, J. W C McNabb, W. Kim, M. M. Ito, P. V. Degtyarenko, K. Kim, R. S. Hakobyan, K. Mikhailov, V. S. Serov, G. Niculescu, J. R. Calarco, J. Hu, S. E. Kuhn, M. Mirazita, G. Ricco, S. A. Morrow, J. M. Laget, J. H. Kelley, C. Tur, A. Shafi, L. Farhi, G. S. Mutchler, I. Niculescu, C. Djalali, D. Lawrence, Elton Smith, V. Frolov, M. Battaglieri, K. Park, P. Nadel-Turonski, M. Anghinolfi, P. Eugenio, I. Hleiqawi, James Mueller, R. J. Feuerbach, S. L. Careccia, M. Taiuti, R. Bradford, K. Lukashin, A. Coleman, A. I. Ostrovidov, Friedrich Klein, P. D. Rubin, Y. G. Sharabian, P. Ambrozewicz, S. Simionatto, H. R. Weller, Brian Raue, K. Livingston, Michael Dugger, H. O. Funsten, V. P. Kubarovsky, K. L. Giovanetti, B. Asavapibhop, A. Empl, O. Pogorelko, M. Spraker, Larry Weinstein, G. Rosner, R. Nasseripour, C. Marchand, Volker D. Burkert, A. S. Biselli, Alexei V. Klimenko, M. D. Mestayer, L. C. Smith, S. J. Gaff, Bernhard Mecking, B. S. Ishkhanov, Michael L. Williams, K. V. Dharmawardane, Inna Aznauryan, B. E. Stokes, Y. Prok, B. B. Niczyporuk, G. S. Adams, Laird Kramer, Barry Ritchie, S. Boiarinov, N. Pivnyuk, J. Napolitano, G. Riccardi, N. Guler, N. Baillie, C. Butuceanu, G. A. Peterson, Valeria Muccifora, Gerard Gilfoyle, P. L. Cole, J. Langheinrich, C. Cetina, Michael Vineyard, A. V. Skabelin, S. S. Stepanyan, S. A. Philips, B. M. Preedom, S. Barrow, R. C. Minehart, C. A. Meyer, G. V. Fedotov, Lorenzo Zana, J. P. Santoro, B. L. Berman, M. Guidal, L. M. Qin, A. Tkabladze, Y. Ilieva, D. P. Weygand, H. S. Jo, Gerald Feldman, M. Holtrop, M. Klusman, K. Wang, C. Salgado, Daniel S. Carman, G. Audit, C. E. Hyde-Wright, M. Nozar, Nicola Bianchi, R. W. Gothe, K. Y. Kim, U. Thoma, F. W. Hersman, S. McAleer, F. X. Girod, J. W. Price, G. V. O'Rielly, D. G. Jenkins, K. Sabourov, L. C. Dennis, and B. E. Bonner
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Roper resonance, 010308 nuclear & particles physics, Structure function, Sigma, Electron, Polarization (waves), 01 natural sciences, Pion, Amplitude, 0103 physical sciences, Nuclear Experiment, 010306 general physics, Beam energy
Abstract: The polarized longitudinal-transverse structure function {sigma}{sub LT{sup '}} measures the interference between real and imaginary amplitudes in pion electroproduction and can be used to probe the coupling between resonant and nonresonant processes. We report new measurements of {sigma}{sub LT{sup '}} in the N(1440)(1/2){sup +} (Roper) resonance region at Q{sup 2}=0.40 and 0.65GeV{sup 2} for both the {pi}{sup 0}p and {pi}{sup +}n channels. The experiment was performed at Jefferson Lab with the CEBAF Large Acceptance Spectrometer (CLAS) using longitudinally polarized electrons at a beam energy of 1.515 GeV. Complete angular distributions were obtained and are compared to recent phenomenological models. The {sigma}{sub LT{sup '}}({pi}{sup +}n) channel shows a large sensitivity to the Roper-resonance multipoles M{sub 1-} and S{sub 1-} and provides new constraints on models of resonance formation.
Published: 2005

254. Search for Theta+ (1540) Pentaquark in High-Statistics Measurement of gammap--K0K+n at CLAS

Author: M, Battaglieri, R, De Vita, V, Kubarovsky, L, Guo, G S, Mutchler, P, Stoler, D P, Weygand, P, Ambrozewicz, M, Anghinolfi, G, Asryan, H, Avakian, H, Bagdasaryan, N, Baillie, J P, Ball, N A, Baltzell, V, Batourine, I, Bedlinskiy, M, Bellis, N, Benmouna, B L, Berman, A S, Biselli, S, Bouchigny, S, Boiarinov, R, Bradford, D, Branford, W J, Briscoe, W K, Brooks, S, Bültmann, V D, Burkert, C, Butuceanu, J R, Calarco, S L, Careccia, D S, Carman, S, Chen, E, Clinton, P L, Cole, P, Coltharp, D, Crabb, H, Crannell, J P, Cummings, D, Dale, E, De Sanctis, P V, Degtyarenko, A, Deur, K V, Dharmawardane, C, Djalali, G E, Dodge, J, Donnelly, D, Doughty, M, Dugger, O P, Dzyubak, H, Egiyan, K S, Egiyan, L, Elouadrhiri, P, Eugenio, G, Fedotov, H, Funsten, M Y, Gabrielyan, L, Gan, M, Garçon, A, Gasparian, G, Gavalian, G P, Gilfoyle, K L, Giovanetti, F X, Girod, O, Glamazdin, J, Goett, J T, Goetz, E, Golovach, A, Gonenc, C I O, Gordon, R W, Gothe, K A, Griffioen, M, Guidal, N, Guler, V, Gyurjyan, C, Hadjidakis, R S, Hakobyan, J, Hardie, F W, Hersman, K, Hicks, I, Hleiqawi, M, Holtrop, C E, Hyde-Wright, Y, Ilieva, D G, Ireland, B S, Ishkhanov, M M, Ito, D, Jenkins, H S, Jo, K, Joo, H G, Juengst, J D, Kellie, M, Khandaker, W, Kim, A, Klein, F J, Klein, A V, Klimenko, M, Kossov, L H, Kramer, J, Kuhn, S E, Kuhn, S V, Kuleshov, J, Lachniet, J M, Laget, J, Langheinrich, D, Lawrence, T, Lee, Ji, Li, K, Livingston, B, McKinnon, B A, Mecking, J J, Melone, M D, Mestayer, C A, Meyer, T, Mibe, K, Mikhailov, R, Minehart, M, Mirazita, R, Miskimen, V, Mochalov, V, Mokeev, L, Morand, S A, Morrow, P, Nadel-Turonski, I, Nakagawa, R, Nasseripour, S, Niccolai, G, Niculescu, I, Niculescu, B B, Niczyporuk, R A, Niyazov, M, Nozar, M, Osipenko, A I, Ostrovidov, K, Park, E, Pasyuk, C, Paterson, J, Pierce, N, Pivnyuk, D, Pocanic, O, Pogorelko, S, Pozdniakov, J W, Price, Y, Prok, D, Protopopescu, B A, Raue, G, Riccardi, G, Ricco, M, Ripani, B G, Ritchie, F, Ronchetti, G, Rosner, P, Rossi, F, Sabatié, C, Salgado, J P, Santoro, V, Sapunenko, R A, Schumacher, V S, Serov, Y G, Sharabian, E S, Smith, L C, Smith, D I, Sober, A, Stavinsky, S S, Stepanyan, S, Stepanyan, B E, Stokes, I I, Strakovsky, S, Strauch, M, Taiuti, D J, Tedeschi, A, Teymurazyan, U, Thoma, A, Tkabladze, S, Tkachenko, L, Todor, C, Tur, M, Ungaro, M F, Vineyard, A V, Vlassov, L B, Weinstein, M, Williams, E, Wolin, M H, Wood, A, Yegneswaran, L, Zana, J, Zhang, and B, Zhao
Abstract: The exclusive reaction gammap--K0K+n was studied in the photon energy range between 1.6 and 3.8 GeV searching for evidence of the exotic baryon Theta+ (1540)--nK+. The decay to nK+requires the assignment of strangeness S=+1 to any observed resonance. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility corresponding to an integrated luminosity of 70 pb-1. No evidence for the Theta+ pentaquark was found. Upper limits were set on the production cross section as function of center-of-mass angle and nK+ mass. The 95% C.L. upper limit on the total cross section for a narrow resonance at 1540 MeV was found to be 0.8 nb.
Published: 2005

255. 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

256. Erratum: Radiative decays of theΣ0(1385)andΛ(1520)hyperons [Phys. Rev. C71, 054609 (2005)]

Author: A. V. Vlassov, T. Lee, M. Spraker, Michael Vineyard, G. V. O'Rielly, B. E. Stokes, G. S. Adams, D. G. Jenkins, B. S. Raue, J. P. Santoro, R. DeVita, J. W C McNabb, L. Todor, Roy Thompson, Kwangsoo Kim, G. Riccardi, C. Butuceanu, D. Protopopescu, S. Pozdniakov, M. Garçon, E. Wolin, J. P. Ball, Y. Prok, D. S. Carman, D. G. Crabb, Yordanka Ilieva, Ji Li, W. Kim, J. P. Cummings, R. A. Schumacher, L. Elouadrhiri, M. Kossov, Rakhsha Nasseripour, K. S. Egiyan, I. I. Strakovsky, V. Koubarovski, C. I O Gordon, M. Bellis, K. Mikhailov, M. M. Ito, M. Nozar, A. Deur, E. De Sanctis, L. Morand, T. A. Forest, S. Stepanyan, Federico Ronchetti, D. I. Sober, A. Empl, O. Pogorelko, L. C. Dennis, B. E. Bonner, G. Ricco, G. S. Mutchler, H. Avakian, V. Batourine, C. A. Meyer, E. Golovatch, G. Asryan, S. Bültmann, B. Carnahan, O. P. Dzyubak, R. A. Niyazov, W. J. Briscoe, E. Pasyuk, F. Sabatié, J. D. Kellie, S. A. Dytman, M. D. Mestayer, J. J. Manak, P. Corvisiero, M. Anghinolfi, U. Thoma, H. R. Weller, G. E. Dodge, Frank Klein, James Mueller, P. V. Degtyarenko, K. Kim, K. V. Dharmawardane, L. C. Smith, J. Shaw, D. P. Weygand, Michael Wood, Y. G. Sharabian, S. A. Morrow, P. Stoler, I. Niculescu, A. Shafi, P. Rubin, C. Djalali, S. Boiarinov, D. Lawrence, M. Guillo, J. Langheinrich, K. Hicks, V. S. Serov, M. Osipenko, S. A. Philips, Shifeng Chen, William Brooks, G. Rosner, Hall Crannell, H. Denizli, V. Sapunenko, C. Marchand, Valeria Muccifora, B. L. Berman, M. Battaglieri, L. M. Qin, P. Ambrozewicz, F. W. Hersman, H. Juengst, A. I. Ostrovidov, A. C S Lima, K. Park, Gerard Gilfoyle, E. Polli, M. Klusman, R. W. Gothe, G. Audit, C. E. Hyde-Wright, A. V. Skabelin, R. J. Feuerbach, Dinko Pocanic, M. Bektasoglu, Alexei V. Klimenko, R. Bradford, B. A. Mecking, Volker D. Burkert, A. S. Biselli, S. E. Kuhn, Cynthia Marie Hadjidakis, B. M. Preedom, M. Guidal, Barry Ritchie, G. Niculescu, P. Eugenio, Stephen Taylor, S. McAleer, M. Taiuti, K. A. Griffioen, Michael Dugger, M. Holtrop, H. O. Funsten, B. B. Niczyporuk, S. Strauch, J. J. Melone, Laird Kramer, D. G. Ireland, N. Pivnyuk, Lorenzo Zana, J. R. Calarco, K. Lukashin, J. Napolitano, R. A. Miskimen, Carlos A. Salgado, D. Branford, J. Hu, Gerald Feldman, M. Mirazita, J. M. Laget, K. Wang, N. Benmouna, M. Ripani, E. S. Smith, Marco A. Huertas, Sylvain Bouchigny, P. Rossi, Mark Richard James Williams, P. Dragovitsch, S. Niccolai, J. Hardie, A.V. Stavinsky, D. J. Tedeschi, K. Beard, Andreas Klein, G. Gavalian, V. Mokeev, D. Doughty, D. Heddle, J. Lachniet, A. Tkabladze, H. Egiyan, E. Anciant, C. S. Whisnant, D. Rowntree, M. Khandaker, V. Gyurjyan, K. Livingston, R. S. Hakobyan, N. Guler, H. Bagdasaryan, J. W. Price, L. Guo, S. Barrow, M. Ungaro, I. Hleiqawi, K. Joo, J. Yun, D. Cords, S. S. Stepanyan, A. Yegneswaran, R. G. Fersch, S. Simionatto, P. L. Cole, K. L. Giovanetti, B. Asavapibhop, Larry Weinstein, Clarisse Tur, Jens H. Kuhn, Nicola Bianchi, R. Suleiman, and R. Fatemi
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Hyperon, Radiative decay, Radiative transfer, Sigma, Lambda, Particle identification
Published: 2005

257. Beam-Helicity Asymmetries in Double-Charged-Pion Photoproduction on the Proton

Author: D. Doughty, G. Ricco, C. Bennhold, Hall Crannell, D. Heddle, K. S. Egiyan, K. Mikhailov, C. Marchand, Shifeng Chen, R. Fatemi, J. Zhang, Gerard Gilfoyle, Marco A. Huertas, A. V. Vlassov, T. Lee, A.V. Stavinsky, Mokeev, R. A. Miskimen, B. McKinnon, M. Guidal, G. Niculescu, B. L. Berman, L. M. Qin, H. Bagdasaryan, J. W. Price, R. A. Schumacher, J. P. Cummings, J. T. Goetz, E. Polli, D. Branford, M. Mirazita, J. M. Laget, Cynthia Marie Hadjidakis, C. Paterson, Brian Raue, Chaden Djalali, Michael Dugger, D. J. Tedeschi, M. Holtrop, S. Strauch, H. Egiyan, L. Guo, M. Ungaro, M. Klusman, R. C. Minehart, J. Lachniet, A. Tkabladze, H. O. Funsten, A. I. Ostrovidov, A. C S Lima, K. Park, L. C. Smith, M. Nozar, T. A. Forest, M. Khandaker, D. Rowntree, S. Stepanyan, Dinko Pocanic, N. Baillie, C. A. Meyer, Calarco, G. V. Fedotov, Sylvain Bouchigny, D. G. Ireland, J. Pierce, M. Kossov, B. S. Ishkhanov, S. E. Kuhn, G. E. Dodge, A. Fix, R. S. Hakobyan, P. Stoler, P. Rossi, I. Bedlinskiy, Daniel S. Carman, S. McAleer, B. Carnahan, F. Sabatié, I. Hleiqawi, K. Joo, Volker D. Burkert, A. S. Biselli, F. X. Girod, G. Audit, Andreas Klein, C. E. Hyde-Wright, S. L. Careccia, Rakhsha Nasseripour, Stephen Taylor, J. Yun, D. P. Weygand, D. Cords, P. V. Degtyarenko, K. Kim, S. S. Stepanyan, A. Yegneswaran, K. Hicks, Elton Smith, K. L. Giovanetti, B. Asavapibhop, H. Denizli, M. Bektasoglu, Larry Weinstein, G. Gavalian, I. Niculescu, D. Lawrence, S. Tkachenko, M. Anghinolfi, Clarisse Tur, P. Nadel-Turonski, Y. Ilieva, James Mueller, N. Benmouna, M. Ripani, E. De Sanctis, Carlos A. Salgado, Laird Kramer, Tsutomu Mibe, R. Suleiman, J. Langheinrich, S. Bültmann, S. A. Philips, Muccifora, Y. G. Sharabian, Federico Ronchetti, A. V. Skabelin, D. I. Sober, J. Donnelly, G. Asryan, O. P. Dzyubak, R. A. Niyazov, Alexei V. Klimenko, P. Dragovitsch, Gyurjyan, W. Kim, P. Coltharp, F. W. Hersman, Barry Ritchie, S. Niccolai, P. Corvisiero, M. M. Ito, Batourine, J. Hardie, G. V. O'Rielly, D. G. Jenkins, R. W. Gothe, Kwangsoo Kim, A. Coleman, M. Osipenko, K. Beard, Winston Roberts, Kalvir S. Dhuga, U. Thoma, C. Butuceanu, Jens H. Kuhn, G. Riccardi, L. Elouadrhiri, R. DeVita, J. W C McNabb, Bernhard Mecking, L. Todor, K. V. Dharmawardane, D. Protopopescu, S. A. Morrow, P. Rubin, A. Deur, S. Pozdniakov, M. Bellis, P. L. Cole, W. K. Brooks, A. Shafi, P. Ambrozewicz, H. Juengst, J. Hu, E. Wolin, K. Livingston, M. Battaglieri, J. P. Ball, R. Bradford, Y. Prok, B. B. Niczyporuk, D. G. Crabb, N. Guler, Sapunenko, N. Pivnyuk, K. Lukashin, J. Napolitano, S. Barrow, Michael Vineyard, J. J. Manak, Michael L. Williams, S. Boiarinov, B. M. Preedom, P. Eugenio, M. Taiuti, Lorenzo Zana, H. S. Jo, Gerald Feldman, K. Wang, J. P. Santoro, Roy Thompson, G. Rosner, B. E. Stokes, G. S. Adams, G. S. Mutchler, N. A. Baltzell, K. A. Griffioen, Mestayer, J. D. Kellie, Frank Klein, J. Shaw, Strakovsky, Michael Wood, V. S. Serov, L. C. Dennis, H. Avakian, W. J. Briscoe, E. Pasyuk, S. A. Dytman, A. Empl, O. Pogorelko, Kubarovsky, R. J. Feuerbach, 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: Particle physics, Photon, Proton, General Physics and Astronomy, FOS: Physical sciences, 13.60.-r, 13.60.Le, 13.88.+e, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pion, 0103 physical sciences, Phenomenological model, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Physics, 010308 nuclear & particles physics, Bremsstrahlung, Helicity, 3. Good health, Pair production, Nucleon
Abstract: Beam-helicity asymmetries for the two-pion-photoproduction reaction gamma + p --> p pi+ pi- have been studied for the first time in the resonance region for center-of-mass energies between 1.35 GeV and 2.30 GeV. The experiment was performed at Jefferson Lab with the CEBAF Large Acceptance Spectrometer using circularly polarized tagged photons incident on an unpolarized hydrogen target. Beam-helicity-dependent angular distributions of the final-state particles were measured. The large cross-section asymmetries exhibit strong sensitivity to the kinematics and dynamics of the reaction. The data are compared with the results of various phenomenological model calculations, and show that these models currently do not provide an adequate description for the behavior of this new observable., 6 pages, 4 figures, submitted to Physical Review Letters
Published: 2005

258. NCI-EORTC-AACR--11th Symposium on New Drugs in Cancer Therapy: Gene therapy and new drugs. 7-10 November 2000, Amsterdam, The Netherlands

Author: I, Niculescu-Duvaz
Abstract: A number of advances in cancer therapy during the last two years were reported, including new strategies, new targets and new compounds. New strategies were developed in gene therapy, drug delivery, drug targeting and prodrug design. New targets within the broad family of kinases, histone deacetylases, proteasomes and hypoxic factors were defined. Improved compounds including tubulin interacting agents, bioreductive agents, angiogenesis inhibitors, DNA interactive agents, anthracyclines, taxanes, cyclin- and tyrosine kinase inhibitors have recently reached the stage of clinical trials. Special attention has been given to chemoprevention and also to structure-activity relationships as a tool for speeding the development of better drugs. The aim of the meeting was to present and discuss the recent results in this area with respect to the R and D of new generations of anticancer compounds. This review focuses on a number of the most recent advances in the area of strategies and anticancer drug and prodrug design presented and discussed in plenary and poster sessions.
Published: 2005

259. Radiative decays of theΣ0(1385)andΛ(1520)hyperons

Author: P. Dragovitsch, G. Gavalian, R. DeVita, M. Guidal, N. Benmouna, M. Ripani, S. Niccolai, J. W C McNabb, Hall Crannell, M. Holtrop, E. Anciant, Alexei V. Klimenko, J. Hardie, S. Strauch, C. Marchand, J. P. Cummings, M. Kossov, Rakhsha Nasseripour, R. A. Miskimen, H. G. Juengst, S. A. Morrow, R. Fatemi, Federico Ronchetti, M. Khandaker, Barry Ritchie, D. Branford, R. A. Schumacher, C. Djalali, A. V. Vlassov, Ji Li, T. Lee, Daniel S. Carman, Cynthia Marie Hadjidakis, Marco A. Huertas, M. Mirazita, J. M. Laget, A.V. Stavinsky, M. Bellis, C. I O Gordon, G. Audit, G. Ricco, Michael Dugger, P. Ambrozewicz, C. E. Hyde-Wright, M. D. Mestayer, G. Asryan, H. O. Funsten, D. J. Tedeschi, K. Livingston, L. Morand, T. A. Forest, C. S. Whisnant, Michael L. Williams, I. Hleiqawi, O. P. Dzyubak, R. A. Niyazov, A. I. Ostrovidov, V. Sapunenko, A. C S Lima, S. Boiarinov, S. Stepanyan, Avraham Klein, Sylvain Bouchigny, B. M. Preedom, S. Simionatto, G. V. O'Rielly, J. Hu, Dinko Pocanic, P. Corvisiero, M. Bektasoglu, D. G. Ireland, M. Nozar, P. Rossi, B. B. Niczyporuk, J. J. Manak, L. C. Smith, Lorenzo Zana, J. P. Santoro, J. Kuhn, K. L. Giovanetti, B. Asavapibhop, Friedrich Klein, H. Denizli, G. E. Dodge, D. G. Jenkins, M. Spraker, Larry Weinstein, B. S. Raue, N. Pivnyuk, Volker D. Burkert, A. S. Biselli, D. Doughty, J. Napolitano, R. J. Feuerbach, Gerald Feldman, M. Battaglieri, R. G. Fersch, K. Wang, S. E. Kuhn, P. Stoler, J. Langheinrich, P. V. Degtyarenko, K. Kim, D. Heddle, C. Salgado, S. McAleer, Laird Kramer, B. L. Berman, L. M. Qin, Hovanes Egiyan, Roy Thompson, S. S. Stepanyan, S. A. Philips, J. Lachniet, R. Bradford, K. Lukashin, I. Niculescu, D. Rowntree, A. V. Skabelin, C. Tur, Stephen Taylor, K. Hicks, N. Guler, D. Lawrence, K. S. Egiyan, E. De Sanctis, V. Gyurjyan, M. Klusman, V. Koubarovski, Michael Vineyard, Valeria Muccifora, R. S. Hakobyan, K. Mikhailov, L. Todor, Shifeng Chen, J. W. Price, J. R. Calarco, H. Bagdasaryan, V. Batourine, D. I. Sober, B. Carnahan, L. Guo, M. Ungaro, Gerard Gilfoyle, P. L. Cole, S. Barrow, P. Eugenio, Bernhard Mecking, E. Polli, K. V. Dharmawardane, M. Taiuti, Elton Smith, J. Yun, D. Cords, H. R. Weller, M. Anghinolfi, A. Yegneswaran, G. Rosner, James Mueller, P. D. Rubin, Y. G. Sharabian, C. A. Meyer, Y. Ilieva, J. J. Melone, A. Tkabladze, D. P. Weygand, Nicola Bianchi, M. M. Ito, K. A. Griffioen, D. Protopopescu, S. Pozdniakov, M. Garçon, A. Shafi, B. E. Stokes, G. S. Adams, J. D. Kellie, K. Joo, R. Suleiman, G. S. Mutchler, M. Guillo, E. Golovatch, L. Elouadrhiri, I. I. Strakovsky, A. Deur, W. K. Brooks, M. Osipenko, F. Sabatié, K. Beard, W. Kim, G. Niculescu, F. W. Hersman, R. W. Gothe, K. Y. Kim, U. Thoma, V. Mokeev, S. Bültmann, E. Wolin, J. P. Ball, Y. Prok, D. G. Crabb, G. Riccardi, C. Butuceanu, K. Park, A. Empl, O. Pogorelko, L. C. Dennis, B. E. Bonner, H. Avakian, W. J. Briscoe, E. Pasyuk, S. A. Dytman, J. Shaw, Michael Wood, and V. S. Serov
Subjects: Physics, Nuclear and High Energy Physics, Meson, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Lambda, Lambda baryon, 01 natural sciences, Particle identification, Sigma baryon, Nuclear physics, Baryon, Particle decay, 0103 physical sciences, Radiative transfer, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract: The electromagnetic decays of the Sig0(1385) and Lambda(1520) hyperons were studied in photon-induced reactions gamma p -> K+ Lambda(1116)gamma in the CLAS detector at the Thomas Jefferson National Accelerator Facility. We report the first observation of the radiative decay of the Sig0(1385) and a measurement of the Lambda(1520) radiative decay width. For the Sig0(1385) -> Lambda(1116)gamma transition, we measured a partial width of 479+/-120(stat)+81-100(sys) keV, larger than all of the existing model predictions. For the Lambda(1520) -> Lambda(1116)gamma transition, we obtained a partial width of 167+/-43(stat)+26-12(sys) keV.
Published: 2005

260. Exclusive photoproduction of the cascade ($\Xi$) hyperons

Author: Alexei V. Klimenko, R. J. Feuerbach, D. Doughty, L. Elouadrhiri, Barry Ritchie, D. Heddle, Laird Kramer, K. Park, G. Rosner, L. C. Smith, S. J. Gaff, G. Ricco, I. I. Strakovsky, David Jenkins, R. Fatemi, A. V. Vlassov, Shifeng Chen, F. W. Hersman, E. Wolin, J. Kuhn, V. P. Kubarovsky, Hovanes Egiyan, Hall Crannell, A. Empl, K. Livingston, O. Pogorelko, P. Stoler, W. K. Brooks, R. W. Gothe, Roy Thompson, J. J. Melone, Friedrich Klein, L. C. Dennis, K. Y. Kim, H. Denizli, U. Thoma, H. Avakian, Brian Raue, C. Marchand, M. Osipenko, B. M. Preedom, V. Sapunenko, Valeria Muccifora, Sylvain Bouchigny, J. P. Ball, Y. Prok, M. Eckhause, J. J. Manak, Y. Kuang, M. Sanzone-Arenhovel, S. O. Nelson, Susan Taylor, K. Hicks, G. V. O'Rielly, J. Connelly, A. V. Skabelin, Gerard Gilfoyle, B. B. Niczyporuk, E. Anciant, W. J. Briscoe, E. Pasyuk, J. T. Goetz, K. S. Egiyan, K. Beard, J. P. Santoro, E. Polli, P. Eugenio, M. Taiuti, N. Pivnyuk, J. Napolitano, R. A. Miskimen, H. G. Juengst, D. G. Crabb, G. S. Mutchler, N. Guler, S. A. Dytman, G. E. Dodge, M. Khandaker, P. V. Degtyarenko, K. Kim, K. Sabourov, J. P. Cummings, C. A. Meyer, A.V. Stavinsky, P. Rossi, G. A. Peterson, Elton Smith, K. Mikhailov, W. Major, W. Kim, S. McAleer, M. Kossov, I. Niculescu, V. Gyurjyan, D. Lawrence, G. Niculescu, B. E. Stokes, G. S. Adams, Federico Ronchetti, D. Branford, M. Mirazita, J. M. Laget, K. Wang, C. Salgado, A. Tkabladze, P. L. Cole, J. Lachniet, B. M. K. Nefkens, D. Rowntree, V. Frolov, K. Joo, S. Barrow, D. J. Tedeschi, S. Strauch, Rakhsha Nasseripour, D. P. Weygand, M. Anghinolfi, D. G. Ireland, M. Guillo, R. A. Schumacher, James Mueller, J. Shaw, Michael Wood, L. Farhi, P. D. Rubin, M. M. Ito, J. R. Calarco, J. W. Price, G. Riccardi, I. Hleiqawi, S. Simionatto, Y. G. Sharabian, V. S. Serov, R. DeVita, Ji Li, H. Bagdasaryan, C. Butuceanu, J. W C McNabb, M. Bellis, R. S. Hakobyan, Dinko Pocanic, C. I O Gordon, D. Hancock, K. L. Giovanetti, B. Asavapibhop, K. A. Griffioen, D. Protopopescu, A. Coleman, M. D. Mestayer, S. A. Morrow, H. R. Weller, C. Djalali, M. Spraker, Larry Weinstein, S. E. Kuhn, S. Pozdniakov, L. Morand, J. H. Kelley, T. A. Forest, Michael L. Williams, J. Hu, C. Tur, S. Stepanyan, A. Shafi, O. P. Dzyubak, J. L. Ducote, S. Boiarinov, P. Ambrozewicz, J. D. Kellie, John T. O'Brien, Avraham Klein, P. Corvisiero, M. Witkowski, Bernhard Mecking, K. V. Dharmawardane, C. Cetina, Y. Ilieva, L. Guo, M. Ungaro, Michael Vineyard, B. Carnahan, L. Todor, F. Sabatié, P. Dragovitsch, M. Battaglieri, Thierry Auger, R. Bradford, K. Lukashin, Nicola Bianchi, R. A. Niyazov, J. Yun, D. Cords, B. L. Berman, L. M. Qin, S. Niccolai, A. Yegneswaran, M. Klusman, J. Hardie, E. De Sanctis, D. I. Sober, A. I. Ostrovidov, Volker D. Burkert, A. S. Biselli, J. Langheinrich, S. A. Philips, Daniel S. Carman, G. Audit, C. E. Hyde-Wright, M. Bektasoglu, M. Nozar, M. Guidal, M. Holtrop, Thomas E. Smith, G. Gavalian, N. Benmouna, M. Ripani, Cynthia Marie Hadjidakis, Michael Dugger, H. O. Funsten, 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: Physics, BARYONS, Nuclear and High Energy Physics, Particle physics, 13.60.Rj, 25.20.Lj, 14.20.Jn, 010308 nuclear & particles physics, Hyperon, FOS: Physical sciences, PENTAQUARKS, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Particle identification, INCLUSIVE PHOTOPRODUCTION, PENTAQUARKS, BARYONS, Cascade, Excited state, 0103 physical sciences, Production (computer science), Nuclear Experiment (nucl-ex), 010306 general physics, Ground state, INCLUSIVE PHOTOPRODUCTION, Nuclear Experiment, Spin-½
Abstract: We report on the first measurement of exclusive Xi-(1321) hyperon photoproduction in gamma p --> K+ K+ Xi- for 3.2 < E(gamma) < 3.9 GeV. The final state is identified by the missing mass in p(gamma,K+ K+)X measured with the CLAS detector at Jefferson Laboratory. We have detected a significant number of the ground-state Xi-(1321)1/2+, and have estimated the total cross section for its production. We have also observed the first excited state Xi-(1530)3/2+. Photoproduction provides a copious source of Xi's. We discuss the possibilities of a search for the recently proposed Xi5-- and Xi5+ pentaquarks., submitted to Phys. Rev. C
Published: 2005

261. Electroproduction of strangeness on [sub Λ][sup 3,4]H bound states on Helium

Author: A. Lung, L. Cole, Rolf Ent, A. Yu. Semenov, D. S. Brown, A. Cochran, H. E. Jackson, John C. Mitchell, R. Asaturyan, K. Gustafsson, Joerg Reinhold, H. C. Fenker, K. Garrow, J. Roche, T. Eden, J. Crowder, P. E. Reimer, G. Collins, Pete Markowitz, Thomas O'Neill, S. A. Wood, H. Breuer, W. Hinton, J.-O. Hansen, Brian Raue, J. A. Dunne, L. A. Ewell, F. Dohrmann, A. Uzzle, P. Ambrozewicz, C. J. Martoff, I. Niculescu, J. W. Price, D. J. Mack, H. Bitao, C. Yan, M. Sarsour, E. Christy, D. H. Potterveld, M. Elaasar, Paul Gueye, A. Ahmidouch, S. Beedoe, L. G. Tang, D. F. Geesaman, Stephen Avery, F. Duncan, H. Mkrtchyan, C. Cothran, R. Sawafta, Y. Liang, L. Yuan, S. Stepanyan, B. Zihlmann, P. G. Roos, Avraham Klein, S. Mtingwa, R. E. Segel, M. Zeier, Kevin Bailey, J. H. Liu, V. Tadevosian, J. Cha, B. Terburg, S. Tajima, R. Mohring, D. G. Meekins, R. Madey, Dipangkar Dutta, N. S. Chant, S. Danagoulian, H. Juengst, G. Savage, C. E. Keppel, G. Niculescu, Ketevi Assamagan, R. D. Carlini, B. Mueller, L. Gan, W. J. Cummings, H. Yamaguchi, J. Arrington, C. S. Armstrong, D. Abbott, D. Koltenuk, Y. Fujii, Haiyan Gao, B. Zeidman, Toshinobu Miyoshi, Yoichi Sato, H. T. Fortune, and K. Hafidi
Subjects: Physics, Particle physics, chemistry.chemical_element, Particle accelerator, Strangeness, Lambda baryon, Lambda, law.invention, Nuclear physics, Helium-4, chemistry, law, Helium-3, Bound state, Helium
Abstract: The A(e,e'K+)X reaction has been investigated at Jefferson Laboratory. Data were taken for Q2 {approx_equal} 0.35 GeV2 at a beam energy of 3.245 GeV for 1H,3He and 4He targets. Evidence for {lambda}-hypernuclear bound states is seen for 3,4He targets. This is the first time that the electroproduction of these hypernuclei has been observed.
Published: 2005

262. Complete measurement of three-body photodisintegration ofHe3for photon energies between 0.35 and1.55GeV

Author: J. P. Ball, Y. Prok, Alexei V. Klimenko, J. R. M. Annand, R. A. Miskimen, H. G. Juengst, L. Guo, M. Ungaro, Barry Ritchie, M. M. Ito, D. Branford, P. Stoler, M. Mirazita, J. M. Laget, A. I. Ostrovidov, A. C S Lima, D. Doughty, A.V. Stavinsky, S. McAleer, Cynthia Marie Hadjidakis, P. Eugenio, K. Joo, A. Coleman, B. B. Niczyporuk, D. G. Crabb, L. C. Smith, D. J. Tedeschi, S. Strauch, N. Pivnyuk, R. A. Schumacher, Marco A. Huertas, R. A. Niyazov, J. Yun, D. Cords, D. Heddle, M. Bellis, J. Napolitano, Dinko Pocanic, Ji Li, M. Guidal, Federico Ronchetti, Michael Dugger, K. Hicks, S. Pozdniakov, Volker D. Burkert, A. S. Biselli, J. P. Cummings, M. Taiuti, S. Stepanyan, Sylvain Bouchigny, K. A. Griffioen, S. E. Kuhn, C. I O Gordon, H. O. Funsten, P. Rossi, J. Hu, G. S. Adams, A. Shafi, J. W. Price, M. D. Mestayer, G. Ricco, M. Holtrop, A. Yegneswaran, D. G. Ireland, H. Denizli, L. Morand, Si Chen, J. R. Calarco, C. Tur, Rolf Ent, R. DeVita, J. W C McNabb, M. Battaglieri, B. L. Berman, T. A. Forest, Michael L. Williams, M. Kossov, S. A. Morrow, C. Djalali, L. M. Qin, P. Heimberg, Andrei Afanasev, I. Popa, K. Livingston, E. De Sanctis, R. Bradford, K. Lukashin, J. D. Kellie, Susan Taylor, P. Ambrozewicz, J. J. Melone, Friedrich Klein, S. Boiarinov, B. M. Preedom, R. J. Feuerbach, L. Y. Murphy, O. P. Dzyubak, Avraham Klein, Brian Raue, Y. Kuang, Daniel S. Carman, V. Gyurjyan, John T. O'Brien, M. Klusman, E. Polli, Laird Kramer, Lorenzo Zana, J. P. Santoro, G. V. O'Rielly, G. Audit, C. E. Hyde-Wright, D. I. Sober, C. S. Whisnant, Elton Smith, J. R. Ficenec, Bernhard Mecking, P. Dragovitsch, K. V. Dharmawardane, Y.Y. Llieva, U. Thoma, N. Guler, D. Protopopescu, H. Bagdasaryan, H. S. Jo, D. G. Jenkins, M. Anghinolfi, Gerald Feldman, Latifa Elouadrhiri, James Mueller, S. Niccolai, Hall Crannell, P. Corvisiero, K. L. Giovanetti, B. Asavapibhop, Larry Weinstein, K. Wang, P. D. Rubin, C. Marchand, Y. G. Sharabian, R. C. Minehart, C. Salgado, R. Fatemi, C. A. Meyer, J. Kuhn, G. V. Fedotov, G. Riccardi, B. Carnahan, G. E. Dodge, M. Bektasoglu, C. Armstrong, F. Sabatié, A. V. Vlassov, J. Hardie, M. Guillo, S. Barrow, K. S. Egiyan, P. V. Degtyarenko, K. Kim, M. Khandaker, M. Nozar, C. Butuceanu, I. Niculescu, P. L. Cole, D. Lawrence, Roy Thompson, R. Naseripour, K. Mikhailov, D. P. Weygand, R. Suleiman, A. V. Skabelin, J. Lachniet, J. Langheinrich, G. S. Mutchler, Michael Vineyard, D. Rowntree, L. Todor, S. A. Philips, G. Gavalian, N. Benmouna, M. Ripani, J. J. Manak, R. S. Hakobyan, E. Golovatch, Nicola Bianchi, K. Hleiqawi, G. Rosner, I. I. Strakovsky, W. K. Brooks, M. Osipenko, K. Beard, Kalvir S. Dhuga, L. C. Dennis, B. E. Bonner, W. Kim, G. Niculescu, H. Avakian, W. J. Briscoe, E. Pasyuk, S. A. Dytman, K. Park, A. Empl, O. Pogorelko, F. W. Hersman, J. Shaw, Michael Wood, V. S. Serov, R. W. Gothe, K. Y. Kim, V. Sapunenko, Valeria Muccifora, Gerard Gilfoyle, Hovanes Egiyan, R. Tkabladze, and E. Wolin
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Photon, Spectrometer, 010308 nuclear & particles physics, Hadron, 7. Clean energy, 01 natural sciences, Baryon, Nuclear physics, Momentum, Massless particle, Photodisintegration, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Nucleon
Abstract: The three-body photodisintegration of 3He has been measured with the CLAS detector at Jefferson Lab, using tagged photons of energies between 0.35 GeV and 1.55 GeV. The large acceptance of the spectrometer allowed us for the first time to cover a wide momentum and angular range for the two outgoing protons. Three kinematic regions dominated by either two- or three-body contributions have been distinguished and analyzed. The measured cross sections have been compared with results of a theoretical model, which, in certain kinematic ranges, have been found to be in reasonable agreement with the data.
Published: 2004

263. Publisher's Note: Angular Distributions forHΛ3,4Bound States in theHe3,4(e,e′K+)Reaction [Phys. Rev. Lett.93, 242501 (2004)]

Author: J. Cha, R. Asaturyan, Yoichi Sato, J. Crowder, Pete Markowitz, S. A. Wood, H. Mkrtchyan, B. Zeidman, Brian Raue, D. J. Mack, C. S. Armstrong, Y. Fujii, D. H. Potterveld, Stephen Avery, H. Bitao, L. Cole, R. E. Segel, Kevin Bailey, G. Niculescu, A. Uzzle, B. Mueller, H. C. Fenker, H. Yamaguchi, B. Zihlmann, A. Semenov, S. Danagoulian, C. E. Keppel, J. H. Liu, H. Juengst, M. Sarsour, S. Mtingwa, M. Zeier, J. Reinhold, John C. Mitchell, F. Dohrmann, C. Yan, L. G. Tang, R. D. Carlini, E. Christy, J. Arrington, L. Yuan, K. Hafidi, D. F. Geesaman, S. Stepanyan, M. Elaasar, I. Niculescu, P. Gueye, Rolf Ent, D. S. Brown, A. Cochran, A. Ahmidouch, A. F. Lung, K. Garrow, P. E. Reimer, V. Tadevosian, W. Hinton, Y. Liang, H. Breuer, S. Tajima, N. S. Chant, L. Gan, J. Roche, and Toshinobu Miyoshi
Subjects: Physics, General Physics and Astronomy
Published: 2004

264. Angular Distributions forHΛ3,4Bound States in theHe3,4(e,e′K+)Reaction

Author: L. G. Tang, J. H. Liu, S. Danagoulian, H. Juengst, C. E. Keppel, H. C. Fenker, L. Cole, G. Niculescu, A. Uzzle, A. Semenov, R. D. Carlini, K. Hafidi, F. Dohrmann, M. Sarsour, C. Yan, P. E. Reimer, S. Mtingwa, S. Tajima, H. Mkrtchyan, D. F. Geesaman, J. Arrington, N. S. Chant, R. E. Segel, K. Garrow, B. Mueller, J. Crowder, S. Stepanyan, L. Gan, J. Roche, H. Breuer, Toshinobu Miyoshi, E. Christy, H. Bitao, Brian Raue, S. A. Wood, Yoichi Sato, P. Gueye, B. Zihlmann, M. Elaasar, I. Niculescu, V. Tadevosian, A. Ahmidouch, D. J. Mack, R. Asaturyan, Stephen Avery, J. Reinhold, Rolf Ent, Pete Markowitz, A. F. Lung, D. S. Brown, W. Hinton, A. Cochran, Y. Liang, Y. Fujii, D. H. Potterveld, B. Zeidman, J. Cha, C. S. Armstrong, H. Yamaguchi, L. Yuan, M. Zeier, John C. Mitchell, and Kevin Bailey
Subjects: Physics, General Physics and Astronomy
Published: 2004

265. Proton Source Size Measurements in theeA→e′ppXReaction

Author: R. A. Schumacher, P. Eugenio, M. Taiuti, C. I O Gordon, Daniel S. Carman, Sylvain Bouchigny, L. Morand, T. A. Forest, G. Audit, C. E. Hyde-Wright, C. A. Meyer, Muccifora, P. Rossi, H. Bagdasaryan, S. Stepanyan, Enzo De Sanctis, G. Asryan, F. Ronchetti, O. P. Dzyubak, R. A. Niyazov, Avraham Klein, M. Bellis, K. Park, L. M. Qin, I. Hleiqawi, A. Tkabladze, S. McAleer, Shifeng Chen, P. Corvisiero, J. Lachniet, D. Rowntree, R. S. Hakobyan, Susan Taylor, D. P. Weygand, R. Fatemi, A. V. Vlassov, K. S. Egiyan, K. Mikhailov, M. Bektasoglu, M. Nozar, S. Simionatto, M. Klusman, E. Polli, B. E. Stokes, G. S. Adams, A. Empl, O. Pogorelko, K. Lukashin, T. Lee, L. C. Smith, G. E. Dodge, Cynthia Marie Hadjidakis, H. Egiyan, K. Joo, Mokeev, K. L. Giovanetti, B. Asavapibhop, B. B. Niczyporuk, N. Pivnyuk, J. Kuhn, Elton Smith, M. Guidal, Chaden Djalali, Daijin Kim, Alexei V. Klimenko, Michael Dugger, M. Spraker, Larry Weinstein, J. W. Price, M. Anghinolfi, C. Cetina, J. Napolitano, Roy Thompson, James Mueller, C. S. Whisnant, Patrick Girard, J. Shaw, P. V. Degtyarenko, K. Kim, Strakovsky, Barry Ritchie, H. O. Funsten, Michael Vineyard, L. Guo, M. Ungaro, L. Todor, R. W. Gothe, S. A. Morrow, M. Holtrop, J. J. Manak, Michael Wood, Raffaella De Vita, V. S. Serov, E. Anciant, P. D. Rubin, Y. G. Sharabian, B. E. Bonner, H. Avakian, Ji Li, R Lednicky, Dinko Pocanic, S. Mehrabyan, K. Y. Kim, G. V. O'Rielly, Thierry Auger, M. Khandaker, Bernhard Mecking, K. V. Dharmawardane, H. Denizli, E. Pasyuk, S. E. Kuhn, D. G. Jenkins, K. Sabourov, J. Langheinrich, U. Thoma, S. S. Stepanyan, S. A. Philips, S. A. Dytman, G. S. Mutchler, G. Riccardi, I. Niculescu, D. Lawrence, Calarco, P. Stoler, C. Butuceanu, J. H. Kelley, G. Ricco, A.V. Stavinsky, D. Doughty, Michael L. Williams, C. Tur, Sapunenko, J. Yun, D. Cords, A. Yegneswaran, D. Heddle, S. Boiarinov, B. M. Preedom, N. Dashyan, R. G. Fersch, A. V. Skabelin, D. I. Sober, P. L. Cole, LS Vorobeyev, Lorenzo Zana, J. P. Santoro, S. O. Nelson, N. Benmouna, M. Ripani, K. Hicks, K. A. Griffioen, K. Wang, J. J. Melone, Friedrich Klein, C. Salgado, J. D. Kellie, Brian Raue, F. W. Hersman, E. Wolin, D. J. Tedeschi, Mestayer, J. P. Ball, Y. Prok, A. Coleman, H. R. Weller, J. P. Cummings, C. Marchand, M. Kossov, D. G. Crabb, Rakhsha Nasseripour, J. Hu, Shalev Gilad, J. W C McNabb, G. Rosner, M. Battaglieri, P. Dragovitsch, S. Niccolai, L.C. Dennis, R. Bradford, J. Hardie, M. Osipenko, F. Sabatié, M. M. Ito, K. Beard, G. Gavalian, Kubarovski, Gyurjyan, W. Kim, G. Niculescu, Batourine, Gerard Gilfoyle, Kim, R. A. Miskimen, H. G. Juengst, G.A. Leksin, D. Branford, M. Mirazita, J. M. Laget, P Ambrozewich, D. Protopopescu, S. Pozdniakov, M. Garçon, A. I. Ostrovidov, D. G. Ireland, Volker D. Burkert, A. S. Biselli, Nicola Bianchi, K. Livingston, N. Guler, G. A. Peterson, R. J. Feuerbach, Laird Kramer, S. Barrow, M. Guillo, L. Elouadrhiri, A. Deur, and W. K. Brooks
Subjects: Nuclear reaction, Baryon, Physics, Proton, Helium-3, Hadron, General Physics and Astronomy, Atomic physics, Nucleon, Isotopes of helium, Lepton
Abstract: Two-proton correlations at small relative momentum q were studied in the e A ( 3 H e , 4 H e , C , F e ) → e ′ p p X reaction at E 0 = 4.46 G e V using the CLAS detector at Jefferson Lab. The enhancement of the correlation function at small q was found to be in accordance with theoretical expectations. Sizes of the emission region were extracted, and proved to be dependent on A and on the proton momentum. The size of the two-proton emission region for He was measured in e A reactions for the first time.
Published: 2004

266. Measurement of the polarized structure functionσLT′forp(e⃗,e′π+)nin theΔ(1232)resonance region

Author: K. Joo, L. C. Smith, I. G. Aznauryan, V. D. Burkert, R. Minehart, G. Adams, P. Ambrozewicz, E. Anciant, M. Anghinolfi, B. Asavapibhop, G. Asryan, G. Audit, T. Auger, H. Avakian, H. Bagdasaryan, J. P. Ball, S. Barrow, V. Batourine, M. Battaglieri, K. Beard, M. Bektasoglu, N. Benmouna, N. Bianchi, A. S. Biselli, S. Boiarinov, B. E. Bonner, S. Bouchigny, R. Bradford, D. Branford, W. J. Briscoe, W. K. Brooks, S. Bültmann, C. Butuceanu, J. R. Calarco, D. S. Carman, B. Carnahan, C. Cetina, S. Chen, L. Ciciani, P. L. Cole, D. Cords, P. Corvisiero, D. Crabb, H. Crannell, J. P. Cummings, E. De Sanctis, R. DeVita, P. V. Degtyarenko, L. Dennis, A. Deur, K. V. Dharmawardane, K. S. Dhuga, C. Djalali, G. E. Dodge, D. Doughty, P. Dragovitsch, M. Dugger, S. Dytman, O. P. Dzyubak, H. Egiyan, K. S. Egiyan, L. Elouadrhiri, A. Empl, P. Eugenio, R. Fersch, R. J. Feuerbach, T. A. Forest, H. Funsten, S. J. Gaff, M. Garçon, G. Gavalian, S. Gilad, G. P. Gilfoyle, K. L. Giovanetti, R. W. Gothe, K. A. Griffioen, M. Guidal, M. Guillo, N. Guler, L. Guo, V. Gyurjyan, C. Hadjidakis, R. S. Hakobyan, J. Hardie, D. Heddle, F. W. Hersman, K. Hicks, I. Hleiqawi, M. Holtrop, J. Hu, C. E. Hyde-Wright, Y. Ilieva, D. Ireland, M. M. Ito, D. Jenkins, H. G. Juengst, J. D. Kellie, J. H. Kelley, M. Khandaker, K. Y. Kim, K. Kim, W. Kim, A. Klein, F. J. Klein, A. V. Klimenko, M. Klusman, M. Kossov, V. Koubarovski, L. H. Kramer, S. E. Kuhn, J. Kuhn, J. Lachniet, J. M. Laget, J. Langheinrich, D. Lawrence, T. Lee, K. Livingston, K. Lukashin, J. J. Manak, C. Marchand, S. McAleer, J. W. C. McNabb, B. A. Mecking, M. D. Mestayer, C. A. Meyer, K. Mikhailov, M. Mirazita, R. Miskimen, V. Mokeev, L. Morand, S. A. Morrow, V. Muccifora, J. Mueller, G. S. Mutchler, J. Napolitano, R. Nasseripour, S. O. Nelson, S. Niccolai, G. Niculescu, I. Niculescu, B. B. Niczyporuk, R. A. Niyazov, M. Nozar, G. V. O’Rielly, M. Osipenko, A. I. Ostrovidov, K. Park, E. Pasyuk, G. Peterson, S. A. Philips, N. Pivnyuk, D. Pocanic, O. Pogorelko, E. Polli, S. Pozdniakov, B. M. Preedom, J. W. Price, Y. Prok, D. Protopopescu, L. M. Qin, B. A. Raue, G. Riccardi, G. Ricco, M. Ripani, B. G. Ritchie, F. Ronchetti, G. Rosner, P. Rossi, D. Rowntree, P. D. Rubin, F. Sabatié, K. Sabourov, C. Salgado, J. P. Santoro, V. Sapunenko, R. A. Schumacher, V. S. Serov, Y. G. Sharabian, J. Shaw, S. Simionatto, A. V. Skabelin, E. S. Smith, D. I. Sober, M. Spraker, A. Stavinsky, S. Stepanyan, S. S. Stepanyan, B. E. Stokes, P. Stoler, I. I. Strakovsky, S. Strauch, M. Taiuti, S. Taylor, D. J. Tedeschi, U. Thoma, R. Thompson, A. Tkabladze, L. Todor, C. Tur, M. Ungaro, M. F. Vineyard, A. V. Vlassov, K. Wang, L. B. Weinstein, H. Weller, D. P. Weygand, M. Williams, E. Wolin, M. H. Wood, A. Yegneswaran, J. Yun, and L. Zana
Subjects: Physics, Nuclear reaction, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Hadron, Elementary particle, 01 natural sciences, Delta baryon, Baryon, Pion, 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon
Abstract: The polarized longitudinal-transverse structure function {sigma}{sub LT{sup '}} has been measured using the p(e-vector,e{sup '}{pi}{sup +})n reaction in the {delta}(1232) resonance region at Q{sup 2}=0.40 and 0.65 GeV{sup 2}. No previous {sigma}{sub LT{sup '}} data exist for this reaction channel. The kinematically complete experiment was performed at the Jefferson Lab with the CEBAF large acceptance spectrometer using longitudinally polarized electrons at an energy of 1.515 GeV. A partial-wave analysis of the data shows generally better agreement with recent phenomenological models of pion electroproduction compared to the previously measured {pi}{sup 0}p channel. A fit to both {pi}{sup 0}p and {pi}{sup +}n channels using a unitary isobar model suggests the unitarized Born terms provide a consistent description of the nonresonant background. The t-channel pion pole term is important in the {pi}{sup 0}p channel through a rescattering correction, which could be model dependent.
Published: 2004

267. Near threshold electroproduction of theωmeson atQ2≈0.5GeV2

Author: L. Ewell, J. Arrington, D. Abbott, S. Danagoulian, J. A. Dunne, John C. Mitchell, D. G. Meekins, Brian Raue, T. Eden, J.-O. Hansen, J. Reinhold, H. Mkrtchyan, H. T. Fortune, Dipanwita Dutta, L. G. Tang, V. Tadevosyan, Oliver Keith Baker, R. Sawafta, G. Niculescu, C. Cothran, Richard Madey, B. Zihlmann, D. H. Potterveld, Kevin Bailey, B. Zeidman, Ketevi Assamagan, R. D. Carlini, Andreas Klein, Donal Day, B. Terburg, J. W. Price, Pete Markowitz, J. Cha, C. Yan, C. S. Armstrong, W. J. Cummings, D. Koltenuk, A. Ahmidouch, K. Gustafsson, F. Duncan, G. Collins, Thomas O'Neill, I. Niculescu, Rolf Ent, G. Savage, Haiyan Gao, W. Hinton, Paul Gueye, D. F. Geesaman, S. A. Wood, S. Stepanyan, P. G. Roos, H. Breuer, D. J. Mack, C. E. Keppel, R. E. Segel, R. Mohring, S. Beedoe, S. Mtingwa, P. Ambrozewicz, and C. J. Martoff
Subjects: Physics, Nuclear and High Energy Physics, Angular range, Particle physics, Photon, Meson production, Meson, 010308 nuclear & particles physics, Parity (physics), 01 natural sciences, Omega, Nuclear physics, Near threshold, Angular distribution, 0103 physical sciences, Nuclear Experiment, 010306 general physics
Abstract: Electroproduction of the {omega} meson was investigated in the {sup 1}H(e,e{sup '}p){omega} reaction. The measurement was performed at a four-momentum transfer Q{sup 2}{approx_equal}0.5 GeV{sup 2}. Angular distributions of the virtual photon-proton center-of-momentum cross sections have been extracted over the full angular range. These distributions exhibit a strong enhancement over t-channel parity exchange processes in the backward direction. According to a newly developed electroproduction model, this enhancement provides significant evidence of resonance formation in the {gamma}*p{yields}{omega}p reaction channel.
Published: 2004

268. Measurements of electron-proton elastic cross sections for0.4<Q2<5.5(GeV∕c)2

Author: R. Asaturyan, B. Mueller, L. Cole, D. Gaskell, A. Lung, Pete Markowitz, B. D. Fox, Rolf Ent, D. Meekins, D. S. Brown, A. Gasparian, A. Cochran, J. A. Dunne, H. Breuer, Ronald Ransome, A. J. Sarty, Ross Milner, John Arrington, C. E. Keppel, L. Gan, J. W. Martin, K. Garrow, R. D. Carlini, M. Harvey, A. Bruell, G. Niculescu, E. Schulte, H. P. Blok, R. J. Holt, Paul Gueye, W. U. Boeglin, D. F. Geesaman, N. S. Chant, S. A. Wood, Wolfgang Lorenzon, J. Reinhold, S. Strauch, Curtis Smith, Raphael Noel Tieulent, S. Stepanyan, P. G. Roos, X. Jiang, M. Bouwhuis, S. F. Pate, H. Mkrtchyan, C. Bochna, L. Yuan, M. A. Miller, Thomas O'Neill, A. Uzzle, Stephen Avery, M. Zeier, V. Tadevosyan, C. S. Armstrong, E. Rollinde, V. Papavassiliou, Dipanwita Dutta, O. K. Baker, P. Bosted, Haiyan Gao, I. Niculescu, Alan M. Nathan, E. R. Kinney, L. G. Tang, M. E. Christy, V. Ziskin, B. Zihlmann, R. Sawafta, F. Xiong, Douglas H Beck, Y. Liang, A. Ahmidouch, E. Segbefia, H. C. Fenker, K. McIlhany, J. H. Mitchell, D. H. Potterveld, W. F. Vulcan, R. B. Piercey, S. Danagoulian, D. McKee, and Donal Day
Subjects: Systematic error, Physics, Nuclear and High Energy Physics, Range (particle radiation), Proton, 010308 nuclear & particles physics, Scattering, Momentum transfer, Electron, Polarization (waves), 01 natural sciences, Nuclear physics, Cross section (physics), 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract: We report on precision measurements of the elastic cross section for electron-proton scattering performed in Hall C at Jefferson Lab. The measurements were made at 28 distinct kinematic settings covering a range in momentum transfer of 0.4
Published: 2004

269. Angular distributions for (3,4)(Lambda)H bound states in the (3,4)He(e,e(')K+) reaction

Author: F, Dohrmann, A, Ahmidouch, C S, Armstrong, J, Arrington, R, Asaturyan, S, Avery, K, Bailey, H, Bitao, H, Breuer, D S, Brown, R, Carlini, J, Cha, N, Chant, E, Christy, A, Cochran, L, Cole, J, Crowder, S, Danagoulian, M, Elaasar, R, Ent, H, Fenker, Y, Fujii, L, Gan, K, Garrow, D F, Geesaman, P, Gueye, K, Hafidi, W, Hinton, H, Juengst, C, Keppel, Y, Liang, J H, Liu, A, Lung, D, Mack, P, Markowitz, J, Mitchell, T, Miyoshi, H, Mkrtchyan, S K, Mtingwa, B, Mueller, G, Niculescu, I, Niculescu, D, Potterveld, B A, Raue, P E, Reimer, J, Reinhold, J, Roche, M, Sarsour, Y, Sato, R E, Segel, A, Semenov, S, Stepanyan, V, Tadevosian, S, Tajima, L, Tang, A, Uzzle, S, Wood, H, Yamaguchi, C, Yan, L, Yuan, B, Zeidman, M, Zeier, and B, Zihlmann
Abstract: The (3,4)(Lambda)H and (4)(Lambda)H hypernuclear bound states have been observed for the first time in kaon electroproduction on (3,4)He targets. The production cross sections have been determined at Q(2)=0.35 GeV2 and W=1.91 GeV. For either hypernucleus the nuclear form factor is determined by comparing the angular distribution of the (3,4)He(e,e(')K+)(3,4)(Lambda)H processes to the elementary cross section 1H(e,e K+)Lambda on the free proton, measured during the same experiment.
Published: 2004

270. Survey of A_LT' asymmetries in semi-exclusive electron scattering on He4 and C12

Author: L. Elouadrhiri, J. Kuhn, V. Sapunenko, Valeria Muccifora, Roy Thompson, R. Fatemi, D. Doughty, P. Dragovitsch, M. Battaglieri, Gerard Gilfoyle, D. Heddle, A. V. Vlassov, T. Lee, J. R. Calarco, S. Niccolai, R. Bradford, Y.G. Sharabian, M. Osipenko, F. Sabatié, B. M. Preedom, Shalev Gilad, R. A. Miskimen, J. Hardie, H. G. Juengst, W. K. Brooks, K. Beard, Ji Li, Lorenzo Zana, J. P. Santoro, M. D. Mestayer, G. Ricco, Kalvir S. Dhuga, Michael L. Williams, M. Guidal, S. Boiarinov, A. I. Ostrovidov, E. Wolin, K. Wang, D. Branford, Dimitri Debruyne, C. Salgado, M. M. Ito, G. Gavalian, J. J. Manak, D. G. Ireland, R. C. Minehart, J. P. Ball, S. Stepanyan, M. Mirazita, J. M. Laget, Y. Prok, I. Hleiqawi, S. Simionatto, Volker D. Burkert, A. S. Biselli, G. E. Dodge, C. A. Meyer, D. Protopopescu, M. Holtrop, Bernhard Mecking, A.V. Stavinsky, K. S. Egiyan, P. Eugenio, M. Taiuti, Cynthia Marie Hadjidakis, C. Cetina, K. A. Griffioen, Michael Vineyard, L. Todor, W. Ingram, K. V. Dharmawardane, K. L. Giovanetti, B. Asavapibhop, Friedrich Klein, S. Pozdniakov, P. V. Degtyarenko, A. Tkabladze, Michael Dugger, Brian Raue, D. G. Crabb, M. Spraker, Larry Weinstein, William Bertozzi, E. Anciant, M. Guillo, D. J. Tedeschi, K. Mikhailov, D. P. Weygand, H. O. Funsten, E. De Sanctis, J. D. Kellie, A. Coleman, H. R. Weller, B. Carnahan, I. Niculescu, Sylvain Bouchigny, W. Kim, S. McAleer, G. Niculescu, M. Khandaker, R. J. Feuerbach, D. I. Sober, D. Lawrence, J. J. Melone, Daniel S. Carman, Alexei V. Klimenko, P. Rossi, G. Rosner, Laird Kramer, G. Audit, Thierry Auger, C. E. Hyde-Wright, Barry Ritchie, R. A. Schumacher, L. C. Smith, Susan Taylor, S. Strauch, H. Egiyan, Federico Ronchetti, C. I O Gordon, Kwangsoo Kim, G. Riccardi, J. Hu, G. S. Mutchler, G. Asryan, Nicola Bianchi, C. Butuceanu, S. McLauchlan, B. E. Stokes, G. S. Adams, K. Joo, L. Morand, T. A. Forest, K. Livingston, O. P. Dzyubak, R. A. Niyazov, C. S. Whisnant, B. L. Berman, N. Guler, U. Thoma, Avraham Klein, G. A. Peterson, A. V. Skabelin, M. Bektasoglu, L. M. Qin, F. W. Hersman, P. Corvisiero, P. L. Cole, S. Barrow, M. Nozar, Hall Crannell, M. Klusman, C. Marchand, N. Benmouna, M. Ripani, L. Guo, M. Ungaro, R. DeVita, P. Stoler, J. W C McNabb, J. Langheinrich, S. A. Philips, J. W. Price, S. O. Nelson, K. Hicks, R. W. Gothe, K. Y. Kim, J. Yun, D. Cords, A. Yegneswaran, G. V. O'Rielly, V. Gyurjyan, D. G. Jenkins, K. Sabourov, H. Bagdasaryan, B. B. Niczyporuk, N. Pivnyuk, J. Napolitano, S. A. Morrow, C. Djalali, P. Ambrozewicz, J. Lachniet, Jan Ryckebusch, D. Rowntree, R. S. Hakobyan, Patrick Girard, J. Shaw, Michael Wood, Baile Zhang, V. S. Serov, Shifeng Chen, M. Bellis, K. Park, E. Polli, Elton Smith, A. Empl, O. Pogorelko, M. Anghinolfi, K. Lukashin, L. C. Dennis, B. E. Bonner, James Mueller, H. Avakian, P. D. Rubin, J. P. Cummings, M. Kossov, Dinko Pocanic, W. J. Briscoe, E. Pasyuk, S. A. Dytman, Rakhsha Nasseripour, S. E. Kuhn, J. H. Kelley, C. Tur, 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 reaction, Nuclear and High Energy Physics, Particle physics, Nuclear Theory, FOS: Physical sciences, Comparisons with model predictions, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 4He, single spin azimuthal asymmetries vs missing momentum, 01 natural sciences, NUCLEON EMISSION, missing energy, Nuclear physics, 12C (polarised e, deduced, 0103 physical sciences, e′p), Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Spin-½, Physics, NUCLEAR REACTIONS, POLARIZED ELECTRONS, E'P REACTIONS, 010308 nuclear & particles physics, Scattering, POLARIZED ELECTRONS, NUCLEON EMISSION, E'P REACTIONS, KNOCKOUT, Helicity, Eikonal approximation, KNOCKOUT, 24.70.+s, 25.30.Dh, 27.10.+h, measured, final state interaction effects, High Energy Physics::Experiment, Nucleon, Glauber, Electron scattering, E=2.261, 4.461 GeV
Abstract: Single spin azimuthal asymmetries A_LT' were measured at Jefferson Lab using 2.2 and 4.4 GeV longitudinally polarized electrons incident on He4 and C12 targets in the CLAS detector. A_LT' is related to the imaginary part of the longitudinal-transverse interference and in quasifree nucleon knockout it provides an unambiguous signature for final state interactions (FSI). Experimental values of A_LT' were found to be below 5%, typically |A_LT'| < 3% for data with good statistical precision. Optical Model in Eikonal Approximation (OMEA) and Relativistic Multiple-Scattering Glauber Approximation (RMSGA) calculations are shown to be consistent with the measured asymmetries., 9 pages, 5 figures
Published: 2004

271. Onset of asymptotic scaling in deuteron photodisintegration

Author: P. Rossi, M. Mirazita, F. Ronchetti, E. De Sanctis, G. Adams, P. Ambrozewicz, E. Anciant, M. Anghinolfi, B. Asavapibhop, G. Audit, H. Avakian, H. Bagdasaryan, J. P. Ball, S. Barrow, M. Battaglieri, K. Beard, M. Bektasoglu, M. Bellis, N. Benmouna, B. L. Berman, W. Bertozzi, N. Bianchi, A. S. Biselli, S. Boiarinov, B. E. Bonner, S. Bouchigny, R. Bradford, D. Branford, W. J. Briscoe, W. K. Brooks, V. D. Burkert, C. Butuceanu, J. R. Calarco, D. S. Carman, B. Carnahan, S. Chen, P. L. Cole, D. Cords, P. Corvisiero, D. Crabb, H. Crannell, J. P. Cummings, R. De Vita, P. V. Degtyarenko, H. Denizli, L. Dennis, A. Deppman, K. V. Dharmawardane, K. S. Dhuga, C. Djalali, G. E. Dodge, D. Doughty, P. Dragovitsch, M. Dugger, S. Dytman, O. P. Dzyubak, H. Egiyan, K. S. Egiyan, L. Elouadrhiri, A. Empl, P. Eugenio, R. Fatemi, R. J. Feuerbach, J. Ficenec, T. A. Forest, H. Funsten, M. Gai, G. Gavalian, S. Gilad, G. P. Gilfoyle, K. L. Giovanetti, C. I. O. Gordon, K. Griffioen, M. Guidal, M. Guillo, L. Guo, V. Gyurjyan, C. Hadjidakis, R. S. Hakobyan, J. Hardie, D. Heddle, F. W. Hersman, K. Hicks, R. S. Hicks, M. Holtrop, J. Hu, C. E. Hyde-Wright, Y. Ilieva, M. M. Ito, D. Jenkins, H. S. Jo, K. Joo, J. D. Kellie, M. Khandaker, K. Y. Kim, K. Kim, W. Kim, A. Klein, F. J. Klein, A. V. Klimenko, M. Klusman, M. Kossov, L. H. Kramer, J. Kuhn, S. E. Kuhn, J. Lachniet, J. M. Laget, D. Lawrence, Ji Li, A. C. S. Lima, K. Livingston, K. Lukashin, J. J. Manak, C. Marchand, S. McAleer, J. McCarthy, J. W. C. McNabb, B. A. Mecking, S. Mehrabyan, J. J. Melone, M. D. Mestayer, C. A. Meyer, K. Mikhailov, R. Miskimen, V. Mokeev, L. Morand, S. A. Morrow, V. Muccifora, J. Mueller, G. S. Mutchler, J. Napolitano, R. Nasseripour, S. Niccolai, G. Niculescu, I. Niculescu, B. B. Niczyporuk, R. A. Niyazov, M. Nozar, J. T. O'Brien, G. V. O'Rielly, M. Osipenko, A. Ostrovidov, K. Park, E. Pasyuk, G. Peterson, S. A. Philips, N. Pivnyuk, D. Pocanic, O. Pogorelko, E. Polli, S. Pozdniakov, B. M. Preedom, J. W. Price, Y. Prok, D. Protopopescu, L. M. Qin, B. A. Raue, G. Riccardi, G. Ricco, M. Ripani, B. G. Ritchie, G. Rosner, D. Rowntree, P. D. Rubin, F. Sabatié, C. Salgado, J. P. Santoro, V. Sapunenko, R. A. Schumacher, V. S. Serov, Y. G. Sharabian, J. Shaw, S. Simionatto, A. V. Skabelin, E. S. Smith, L. C. Smith, D. I. Sober, M. Spraker, A. Stavinsky, S. Stepanyan, B. Stokes, P. Stoler, I. I. Strakovsky, S. Strauch, M. Taiuti, S. Taylor, D. J. Tedeschi, U. Thoma, R. Thompson, A. Tkabladze, L. Todor, C. Tur, M. Ungaro, M. F. Vineyard, A. V. Vlassov, K. Wang, L. B. Weinstein, H. Weller, D. P. Weygand, C. S. Whisnant, E. Wolin, M. H. Wood, A. Yegneswaran, J. Yun, B. Zhang, and Z. Zhou
Subjects: Physics, Proton, High Energy Physics::Lattice, High Energy Physics::Phenomenology, Nuclear Theory, Hadron, Strong interaction, 2-BODY PHOTODISINTEGRATION, FOS: Physical sciences, General Physics and Astronomy, Photon energy, High Energy Physics - Experiment, Nuclear physics, Momentum, Baryon, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Photodisintegration, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Atomic physics, Nuclear Experiment, Nucleon
Abstract: We investigate the transition from the nucleon-meson to quark-gluon description of the strong interaction using the photon energy dependence of the $d(\gamma,p)n$ differential cross section for photon energies above 0.5 GeV and center-of-mass proton angles between $30^{\circ}$ and $150^{\circ}$. A possible signature for this transition is the onset of cross section $s^{-11}$ scaling with the total energy squared, $s$, at some proton transverse momentum, $P_T$. The results show that the scaling has been reached for proton transverse momentum above about 1.1 GeV/c. This may indicate that the quark-gluon regime is reached above this momentum., Comment: Accepted by PRL; 5 pages, 2 figures
Published: 2004

272. Tensor polarization of theϕmeson photoproduced at hight

Author: J. P. Cummings, M. Kossov, J. Langheinrich, M. Bektasoglu, Rakhsha Nasseripour, S. A. Philips, P. Dragovitsch, Jing Zhao, Daniel S. Carman, P. Stoler, M. Osipenko, K. Beard, G. Audit, C. E. Hyde-Wright, J. Lachniet, Dinko Pocanic, S. Niccolai, S. E. Kuhn, L. C. Dennis, S. O. Nelson, K. Hicks, J. H. Kelley, C. Tur, D. Rowntree, B. E. Bonner, Hall Crannell, Susan Taylor, S. McAleer, J. Hardie, G. Gavalian, M. Guillo, J. Kuhn, H. Egiyan, H. Avakian, B. M. Preedom, W. Major, R. S. Hakobyan, O. P. Dzyubak, R. A. Niyazov, C. Marchand, M. Guidal, G. Niculescu, Roy Thompson, R. A. Schumacher, R. A. Miskimen, M. Holtrop, H. G. Juengst, P. Corvisiero, E. Anciant, C. S. Whisnant, J. P. Santoro, C. I O Gordon, G. A. Peterson, D. J. Tedeschi, W. Kim, K. S. Egiyan, F. W. Hersman, E. Pasyuk, S. Barrow, L. Morand, T. A. Forest, M. Mirazita, J. M. Laget, P. Eugenio, M. Taiuti, S. A. Dytman, B. Carnahan, F. Sabatié, M. Khandaker, R. J. Feuerbach, K. Wang, T. Smith, C. Salgado, L. Farhi, Thierry Auger, Volker D. Burkert, A. S. Biselli, U. Thoma, Avraham Klein, G. S. Adams, D. Hancock, G. Ricco, K. Joo, G. E. Dodge, Patrick Girard, B. L. Berman, J. Shaw, V. Gyurjyan, D. Doughty, Nicola Bianchi, Michael Wood, V. Sapunenko, L. M. Qin, Valeria Muccifora, Philip L. Cole, P. V. Degtyarenko, V. S. Serov, Laird Kramer, A. Coleman, D. Heddle, H. R. Weller, C. Cetina, Gerard Gilfoyle, L. Todor, Moshe Gai, M. Klusman, Michael Vineyard, M. Bellis, K. Park, D. Protopopescu, M. Garçon, J. W. Price, I. Niculescu, Z. L. Zhou, H. Bagdasaryan, J. J. Melone, D. Lawrence, Friedrich Klein, R. S. Hicks, Brian Raue, A. Shafi, Ji Li, L. Guo, M. Ungaro, M. D. Mestayer, O. Pogorelko, W. K. Brooks, F. Ronchetti, V. Frolov, S. Boiarinov, J. Yun, D. Cords, K. L. Giovanetti, B. Asavapibhop, M. Spraker, Larry Weinstein, A. Yegneswaran, L. C. Smith, S. J. Gaff, D. G. Jenkins, K. Sabourov, Cynthia Marie Hadjidakis, Michael Dugger, M. Nozar, E. De Sanctis, H. O. Funsten, M. M. Ito, D. I. Sober, A. V. Vlassov, J. J. Manak, S. Mehrabyan, Elton Smith, J. R. Ficenec, M. Anghinolfi, James Mueller, K. McCormick, P. D. Rubin, Y. G. Sharabian, C. Butuceanu, Shifeng Chen, E. Wolin, Y. Kuang, E. Polli, J. P. Ball, Y. Prok, M. Eckhause, M. Sargsyan, Latifa Elouadrhiri, D. G. Crabb, R. C. Minehart, C. A. Meyer, D. P. Weygand, N. Benmouna, M. Ripani, H. Denizli, J. Connelly, A. V. Skabelin, Alexei V. Klimenko, Barry Ritchie, M. Battaglieri, R. Bradford, K. Lukashin, S. Strauch, J. R. Calarco, M. Witkowski, Bernhard Mecking, K. V. Dharmawardane, G. S. Mutchler, K. A. Griffioen, S. Stepanyan, Sylvain Bouchigny, P. Rossi, G. Riccardi, R. DeVita, J. W C McNabb, S. A. Morrow, C. Djalali, Shalev Gilad, P. Ambrozewicz, M. Sanzone-Arenhovel, B. B. Niczyporuk, N. Pivnyuk, and J. Napolitano
Subjects: Physics, Coupling constant, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Momentum transfer, Hadron, Quarkonium, Phi meson, 01 natural sciences, Helicity, Nuclear physics, Particle decay, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics
Abstract: As part of a measurement [E. Anciant et al., Phys. Rev. Lett. 85, 4682 (2000)] of the cross section of phi meson photoproduction to high momentum transfer, we measured the polar angular decay distribution of the outgoing K+ in the channel K+K- in the phi center-of-mass frame (the helicity frame). We find that phi s-channel helicity conservation (SCHC) holds in the kinematical range where t-channel exchange dominates (up to -t {approx}2.5 GeV2 for E = 3.6 GeV). Above this momentum, phi u-channel production of a meson dominates and induces a violation of SCHC. The deduced value of the phi NN coupling constant lies in the upper range of previously reported values.
Published: 2004

273. Publisher’s Note: Two-Nucleon Momentum Distributions Measured inHe3(e,e′pp)n[Phys. Rev. Lett.PRLTAO0031-900792, 052303 (2004)]

Author: K. A. Griffioen, Shifeng Chen, G. Gavalian, S. McAleer, Y. Kuang, J. Langheinrich, Cynthia Marie Hadjidakis, S. A. Philips, E. Wolin, E. Polli, Michael Dugger, R. DeVita, H. O. Funsten, J. W C McNabb, S. Strauch, J. P. Ball, Y. Prok, P. L. Cole, D. S. Carman, Dinko Pocanic, V. Gyurjyan, H. Bagdasaryan, J. W. Price, Min Suk Kim, J. R. Calarco, R. A. Schumacher, Frank Klein, S. E. Kuhn, J. P. Cummings, J. Hu, C. A. Meyer, G. S. Mutchler, J. H. Kelley, Stephen Taylor, R. Fatemi, Carlos A. Salgado, C. I O Gordon, Patrick Girard, J. Shaw, Federico Ronchetti, G. Audit, C. E. Hyde-Wright, S. A. Morrow, P. Rubin, M. Eckhause, C. Djalali, A. V. Vlassov, D. G. Crabb, L. Ciciani, M. Nozar, Michael Wood, G. V. O'Rielly, R. J. Feuerbach, J. Lachniet, L. Morand, D. Rowntree, M. Kossov, T. A. Forest, V. S. Serov, G. Ricco, S. Stepanyan, P. Ambrozewicz, H. Juengst, M. Osipenko, J. R. Ficenec, M. Bektasoglu, Rakhsha Nasseripour, N. Dashyan, D. G. Jenkins, M. Bellis, K. Sabourov, M. Anghinolfi, K. Park, Shalev Gilad, S. Simionatto, E. S. Smith, James Mueller, K. Beard, R. S. Hakobyan, E. De Sanctis, P. Eugenio, L. C. Smith, B. Carnahan, G. E. Dodge, F. Sabatié, D. P. Weygand, M. Guidal, Y. G. Sharabian, Sylvain Bouchigny, Yordanka Ilieva, D. I. Sober, P. Dragovitsch, Ji Li, Brian Raue, P. Rossi, G. Niculescu, Daijin Kim, P. V. Degtyarenko, K. Kim, Volker D. Burkert, A. S. Biselli, B. B. Niczyporuk, W. Kim, M. Taiuti, N. Pivnyuk, K. L. Giovanetti, B. Asavapibhop, S. Niccolai, A. Empl, O. Pogorelko, M. Holtrop, M. D. Mestayer, J. J. Manak, Clarisse Tur, K. Lukashin, J. Napolitano, L. C. Dennis, I. Niculescu, D. Lawrence, Laird Kramer, Alexei V. Klimenko, Larry Weinstein, B. E. Bonner, Thierry Auger, J. Hardie, H. Avakian, G. Asryan, O. P. Dzyubak, R. A. Niyazov, N. Benmouna, M. Ripani, D. Doughty, K. V. Dharmawardane, S. Boiarinov, S. Mehrabyan, Barry Ritchie, D. Heddle, Kwangsoo Kim, G. Riccardi, William Brooks, Hall Crannell, C. Butuceanu, P. Corvisiero, M. Spraker, C. Cetina, Michael Vineyard, J. D. Kellie, K. S. Dhuga, C. Marchand, B. M. Preedom, J. J. Melone, William Bertozzi, E. Anciant, B. L. Berman, L. M. Qin, E. Pasyuk, M. Khandaker, K. Wang, J. P. Santoro, M. Klusman, S. A. Dytman, Roy Thompson, M. Battaglieri, P. Stoler, A. Coleman, S. O. Nelson, H. Denizli, H. R. Weller, K. Hicks, K. S. Egiyan, R. Bradford, B. A. Mecking, K. Mikhailov, A. V. Skabelin, M. M. Ito, H. Egiyan, S. McLauchlan, C. S. Whisnant, G. S. Adams, L. Todor, D. Protopopescu, S. Pozdniakov, A. Shafi, U. Thoma, Jens H. Kuhn, Nicola Bianchi, K. Livingston, W. Ingram, F. W. Hersman, G. A. Peterson, M. Guillo, S. Barrow, R. W. Gothe, L. Elouadrhiri, R. A. Miskimen, I. I. Strakovsky, L. Guo, M. Ungaro, K. Joo, D. Branford, J. Yun, D. Cords, A. Yegneswaran, M. Mirazita, J. M. Laget, V. Sapunenko, Valeria Muccifora, A.V. Stavinsky, D. J. Tedeschi, Gerard Gilfoyle, Andreas Klein, and Baile Zhang
Subjects: Physics, Momentum (technical analysis), General Physics and Astronomy, Few-body systems, Nucleon, Mathematical physics
Published: 2004

274. Two-Nucleon Momentum Distributions Measured inHe3(e,e′pp)n

Author: S. A. Morrow, C. Djalali, Ji Li, P. Ambrozewicz, M. D. Mestayer, E. Wolin, Susan Taylor, L. C. Smith, S. Strauch, P. Eugenio, M. Bellis, K. Park, S. McLauchlan, J. P. Ball, Y. Prok, H. Denizli, S. Boiarinov, M. Taiuti, M. Eckhause, G. S. Mutchler, C. S. Whisnant, Dinko Pocanic, G. S. Adams, Bernhard Mecking, K. V. Dharmawardane, Sylvain Bouchigny, R. Fatemi, G. Gavalian, Cynthia Marie Hadjidakis, P. Rossi, J. Hu, D. G. Crabb, A. V. Vlassov, A. V. Skabelin, Shalev Gilad, A. Empl, Michael Dugger, O. Pogorelko, H. O. Funsten, G. Riccardi, R. J. Feuerbach, S. E. Kuhn, M. Guidal, K. Lukashin, M. Battaglieri, G. Niculescu, Daijin Kim, J. R. Calarco, R. DeVita, J. W C McNabb, J. J. Manak, S. Mehrabyan, R. Bradford, Hall Crannell, Alexei V. Klimenko, P. Stoler, C. Cetina, Michael Vineyard, M. Holtrop, Barry Ritchie, J. H. Kelley, C. Marchand, J. P. Cummings, L. Guo, M. Ungaro, B. M. Preedom, C. Tur, S. O. Nelson, R. A. Schumacher, B. Carnahan, C. Butuceanu, F. Sabatié, L.C. Dennis, B. B. Niczyporuk, K. A. Griffioen, K. Hicks, M. M. Ito, Patrick Girard, J. Shaw, E. De Sanctis, M. Kossov, C. I O Gordon, U. Thoma, N. Dashyan, J. P. Santoro, J. Kuhn, N. Pivnyuk, M. Osipenko, Michael Wood, D. I. Sober, Rakhsha Nasseripour, K. S. Egiyan, Thierry Auger, J. Napolitano, Roy Thompson, J. Langheinrich, S. A. Philips, C. A. Meyer, K. Beard, L. Morand, T. A. Forest, V. S. Serov, B. E. Bonner, S. Stepanyan, Elton Smith, J. R. Ficenec, H. Avakian, K. Mikhailov, Kalvir S. Dhuga, K. Wang, G. V. O'Rielly, J. D. Kellie, Avraham Klein, R. W. Gothe, C. Salgado, G. E. Dodge, M. Anghinolfi, D. P. Weygand, Daniel S. Carman, P. V. Degtyarenko, K. Kim, James Mueller, B. L. Berman, G. Audit, C. E. Hyde-Wright, E. Pasyuk, L. M. Qin, S. A. Dytman, I. Niculescu, D. Lawrence, P. D. Rubin, N. Benmouna, M. Ripani, Y. G. Sharabian, G. Asryan, O. P. Dzyubak, R. A. Niyazov, M. Klusman, K. Joo, D. G. Jenkins, K. Sabourov, J. Yun, D. Cords, A. Coleman, Baile Zhang, H. R. Weller, P. Corvisiero, M. Nozar, K. Y. Kim, Shifeng Chen, A. Yegneswaran, Y. Kuang, S. McAleer, E. Polli, W. Ingram, V. Gyurjyan, Laird Kramer, H. Bagdasaryan, M. Guillo, Min Suk Kim, J. W. Price, L. Elouadrhiri, I. I. Strakovsky, J. Lachniet, F. W. Hersman, W. K. Brooks, D. Rowntree, M. Bektasoglu, R. S. Hakobyan, D. Doughty, Volker D. Burkert, A. S. Biselli, D. Heddle, William Bertozzi, Hovanes Egiyan, E. Anciant, V. Sapunenko, G. Ricco, Valeria Muccifora, Philip L. Cole, P. Dragovitsch, M. Khandaker, S. Niccolai, J. J. Melone, Friedrich Klein, J. Hardie, Gerard Gilfoyle, Brian Raue, A.V. Stavinsky, D. J. Tedeschi, L. Todor, R. A. Miskimen, H. G. Juengst, D. Protopopescu, L. Ciciani, Federico Ronchetti, D. Branford, S. Pozdniakov, S. Simionatto, M. Mirazita, J. M. Laget, K. L. Giovanetti, B. Asavapibhop, A. Shafi, M. Spraker, Larry Weinstein, Y. Ilieva, Nicola Bianchi, K. Livingston, G. A. Peterson, S. Barrow, and W. Kim
Subjects: Nuclear reaction, Physics, Particle physics, Nuclear Theory, Momentum transfer, General Physics and Astronomy, Kinetic energy, Nuclear physics, Momentum, Baryon, Pair production, Nuclear Experiment, Nucleon, Lepton
Abstract: We have measured the 3He(e,e'pp)n reaction at 2.2 GeV over a wide kinematic range. The kinetic energy distribution for ''fast'' nucleons (p > 250 MeV/c) peaks where two nucleons each have 20% or less, and the third nucleon has most of the transferred energy. These fast pp and pn pairs are back-to-back with little momentum along the three-momentum transfer, indicating that they are spectators. Experimental and theoretical evidence indicates that we have measured distorted two-nucleon momentum distributions by striking the third nucleon and detecting the spectator correlated pair.
Published: 2004

275. Publisher’s Note: Observation of an Exotic Baryon withS=+1in Photoproduction from the Proton [Phys. Rev. Lett.PRLTAO0031-900792, 032001 (2004)]

Author: K. Park, Clarisse Tur, Volker D. Burkert, A. K. Opper, Shifeng Chen, A. S. Biselli, M. Osipenko, U. Thoma, L. C. Smith, K. Beard, S. J. Gaff, R. W. Major, B. Carnahan, F. Sabatié, E. Polli, G. V. O'Rielly, B. M. Preedom, J. Lachniet, D. Rowntree, L. Elouadrhiri, V. Gyurjyan, J. P. Santoro, L. Ciciani, K. A. Griffioen, S. Simionatto, D. G. Jenkins, Roy Thompson, K. Sabourov, Thierry Auger, K. L. Giovanetti, B. Asavapibhop, Larry Weinstein, Dinko Pocanic, I. I. Strakovsky, G. Gavalian, V. Mokeev, R. S. Hakobyan, Brian Raue, S. E. Kuhn, K. Wang, R. C. Minehart, R. A. Miskimen, C. A. Meyer, J. Langheinrich, E. De Sanctis, V. V. Frolov, J. H. Kelley, Stephen Taylor, H. Bagdasaryan, S. A. Philips, G. S. Adams, F. W. Hersman, S. McAleer, G. A. Peterson, J. P. Cummings, O. P. Dzyubak, R. A. Niyazov, D. Branford, M. Mirazita, J. W. Price, L. Guo, M. Ungaro, S. Barrow, B. L. Berman, John T. O'Brien, W. Kim, M. Kossov, D. I. Sober, P. L. Cole, P. Dragovitsch, J. M. Laget, L. M. Qin, Laird Kramer, H. Egiyan, D. P. Weygand, P. Corvisiero, Alexei V. Klimenko, R. Fatemi, J. R. Ficenec, Rakhsha Nasseripour, L. Todor, D. Protopopescu, William Brooks, A. V. Vlassov, P. Eugenio, M. Taiuti, M. Anghinolfi, S. Strauch, S. Niccolai, Hall Crannell, S. Pozdniakov, M. Garçon, C. S. Whisnant, Federico Ronchetti, James Mueller, M. Spraker, C. Cetina, Frank Klein, G. S. Mutchler, Barry Ritchie, J. Hardie, Michael Vineyard, A. Longhi, J. R. Calarco, R. DeVita, J. W C McNabb, Y. G. Sharabian, R. W. Gothe, M. Guidal, M. Klusman, M. Guillo, N. Benmouna, A.V. Stavinsky, J. J. Melone, A. Weisberg, P. Stoler, J. Hu, K. Joo, C. Marchand, Ji Li, M. Ripani, G. Niculescu, Carlos A. Salgado, S. A. Morrow, P. Rubin, J. Yun, D. Cords, A. Shafi, M. D. Mestayer, P. Heimberg, C. Djalali, D. J. Tedeschi, A. Yegneswaran, Patrick Girard, J. J. Manak, J. Shaw, S. O. Nelson, K. Hicks, Michael Wood, S. Boiarinov, M. Holtrop, Thomas E. Smith, R. A. Schumacher, E. S. Smith, K. S. Egiyan, P. Ambrozewicz, V. S. Serov, K. Mikhailov, Cynthia Marie Hadjidakis, H. Denizli, Sylvain Bouchigny, H. Juengst, Michael Dugger, H. O. Funsten, C. I O Gordon, P. Rossi, L. Farhi, M. Nozar, M. Bellis, M. U. Mozer, L. Morand, T. A. Forest, S. Stepanyan, G. Audit, V. Sapunenko, G. E. Dodge, J. Connelly, A. V. Skabelin, K. V. Dharmawardane, R. J. Feuerbach, P. V. Degtyarenko, K. Kim, V. P. Kubarovsky, Valeria Muccifora, I. Niculescu, D. Lawrence, M. Bektasoglu, A. Empl, B. B. Niczyporuk, O. Pogorelko, D. Hancock, N. Pivnyuk, K. Lukashin, J. Napolitano, L. C. Dennis, Gerard Gilfoyle, Jens H. Kuhn, Nicola Bianchi, H. Avakian, M. M. Ito, W. J. Briscoe, M. Battaglieri, E. Pasyuk, S. A. Dytman, R. Bradford, B. A. Mecking, E. Anciant, M. Khandaker, D. Doughty, D. Heddle, Yordanka Ilieva, S. Mehrabyan, Kwangsoo Kim, G. Riccardi, C. Butuceanu, E. Wolin, J. P. Ball, Y. Prok, D. S. Carman, M. Sargsyan, and D. G. Crabb
Subjects: Nuclear physics, Physics, Particle physics, Proton, Exotic baryon, Hyperon, General Physics and Astronomy
Published: 2004

276. Measurement of the Electric Form Factor of the Neutron atQ2=0.5and1.0 GeV2/c2

Author: B. Norum, B. Vlahovic, L. Cole, R. Trojer, D. McNulty, S. A. Wood, I. Goussev, Hartmuth Arenhövel, L. Coman, S. E. Kuhn, James J. Kelly, B. Vulcan, C. Yan, Alexei V. Klimenko, Jonathan A.D. Farrell, S. Tajima, D. J. Mack, G. Testa, R. Asaturyan, N. S. Chant, M. L. Seely, Andreas Klein, K. Wang, J. Roche, A. K. Opper, Rakhsha Nasseripour, John C. Mitchell, Eli Piasetzky, Curtis Smith, J. Lichtenstadt, Ingo Sick, C. D. Keith, Pete Markowitz, Laird Kramer, R. Fatemi, B. Boillat, M. Khandaker, M. Hauger, D. Sacker, J. A. Dunne, N. Savvinov, M. Coman, M. Steinacher, H. Zhu, H. Breuer, F. Bloch, O. A. Rondon, Daniela Rohe, L. Yuan, J. Brower, Brian Raue, B. Hu, Y. Yanay, Paul Gueye, D. G. Meekins, I. Jaegle, K. Normand, Ashot Gasparian, B. Krusche, M. Harvey, C. E. Keppel, I. Ben-Dayan, E. Christy, T. A. Forest, H. Mkrtchyan, S. Stepanyan, M. Carl, J. Pierce, Y. Liang, H. Woehrle, J. Cha, J. Yun, R. Herrera, B. Sawatzky, L. G. Tang, J. Jourdan, H. C. Fenker, R. A. Lindgren, A. Ahmidouch, J. Stout, M. Pitt, G. Maclachlan, M. K. Jones, M. Zeier, M. Elaasar, I. Niculescu, Y. Prok, F. R. Wesselmann, A. F. Lung, D. G. Crabb, P. McKee, S. Wells, S. Danagoulian, Donal Day, J. Liu, George Davey Smith, J. Reinhold, W. U. Boeglin, Glen A. Warren, A. Aghalaryan, V. Tadevosyan, C. Carasco, B. Zihlmann, R. D. Carlini, D. Fawcett, Neven Simicevic, K. Garrow, K. Duek, and Rolf Ent
Subjects: Elastic scattering, Physics, Magnetization, Deuterium, Momentum transfer, Electric form factor, General Physics and Astronomy, High Energy Physics::Experiment, Neutron, Electron, Atomic physics, Nuclear Experiment, Nucleon
Abstract: The electric form factor of the neutron was determined from measurements of the (d) over right arrow((e) over right arrow ,e(`)n)p reaction for quasielastic kinematics. Polarized electrons were scattered off a polarized deuterated ammonia ((ND3)-N-15) target in which the deuteron polarization was perpendicular to the momentum transfer. The scattered electrons were detected in a magnetic spectrometer in coincidence with neutrons in a large solid angle detector. We find G(E)(n)=0.0526+/-0.0033(stat)+/-0.0026(sys) and 0.0454+/-0.0054+/-0.0037 at Q(2)=0.5 and 1.0 (GeV/c)(2), respectively.
Published: 2004

277. Two-Nucleon Momentum Distributions Measured in 3He(e,e'pp)n

Author: R A, Niyazov, L B, Weinstein, G, Adams, P, Ambrozewicz, E, Anciant, M, Anghinolfi, B, Asavapibhop, G, Asryan, G, Audit, T, Auger, H, Avakian, H, Bagdasaryan, J P, Ball, S, Barrow, M, Battaglieri, K, Beard, M, Bektasoglu, M, Bellis, N, Benmouna, B L, Berman, W, Bertozzi, N, Bianchi, A S, Biselli, S, Boiarinov, B E, Bonner, S, Bouchigny, R, Bradford, D, Branford, W K, Brooks, V D, Burkert, C, Butuceanu, J R, Calarco, D S, Carman, B, Carnahan, C, Cetina, S, Chen, L, Ciciani, P L, Cole, A, Coleman, D, Cords, P, Corvisiero, D, Crabb, H, Crannell, J P, Cummings, E, De Sanctis, N, Dashyan, R, DeVita, P V, Degtyarenko, H, Denizli, L, Dennis, K V, Dharmawardane, K S, Dhuga, C, Djalali, G E, Dodge, D, Doughty, P, Dragovitsch, M, Dugger, S, Dytman, O P, Dzyubak, M, Eckhause, H, Egiyan, K S, Egiyan, L, Elouadrhiri, A, Empl, P, Eugenio, R, Fatemi, R J, Feuerbach, J, Ficenec, T A, Forest, H, Funsten, G, Gavalian, S, Gilad, G P, Gilfoyle, K L, Giovanetti, P, Girard, C I O, Gordon, R W, Gothe, K, Griffioen, M, Guidal, M, Guillo, L, Guo, V, Gyurjyan, C, Hadjidakis, R S, Hakobyan, J, Hardie, D, Heddle, F W, Hersman, K, Hicks, M, Holtrop, J, Hu, C E, Hyde-Wright, Y, Ilieva, W, Ingram, M M, Ito, D, Jenkins, K, Joo, H G, Juengst, J H, Kelley, J, Kellie, M, Khandaker, D H, Kim, K Y, Kim, K, Kim, M S, Kim, W, Kim, A, Klein, F J, Klein, A V, Klimenko, M, Klusman, M, Kossov, L H, Kramer, Y, Kuang, S E, Kuhn, J, Kuhn, J, Lachniet, J M, Laget, J, Langheinrich, D, Lawrence, Ji, Li, K, Livingston, K, Lukashin, J J, Manak, C, Marchand, S, McAleer, S, McLauchlan, J W C, McNabb, B A, Mecking, S, Mehrabyan, J J, Melone, M D, Mestayer, C A, Meyer, K, Mikhailov, M, Mirazita, R, Miskimen, L, Morand, S A, Morrow, V, Muccifora, J, Mueller, G S, Mutchler, J, Napolitano, R, Nasseripour, S O, Nelson, S, Niccolai, G, Niculescu, I, Niculescu, B B, Niczyporuk, M, Nozar, G V, O'Rielly, M, Osipenko, K, Park, E, Pasyuk, G, Peterson, S A, Philips, N, Pivnyuk, D, Pocanic, O, Pogorelko, E, Polli, S, Pozdniakov, B M, Preedom, J W, Price, Y, Prok, D, Protopopescu, L M, Qin, B A, Raue, G, Riccardi, G, Ricco, M, Ripani, B G, Ritchie, F, Ronchetti, P, Rossi, D, Rowntree, P D, Rubin, F, Sabatié, K, Sabourov, C, Salgado, J P, Santoro, V, Sapunenko, R A, Schumacher, V S, Serov, A, Shafi, Y G, Sharabian, J, Shaw, S, Simionatto, A V, Skabelin, E S, Smith, L C, Smith, D I, Sober, M, Spraker, A, Stavinsky, S, Stepanyan, P, Stoler, I I, Strakovsky, S, Strauch, M, Taiuti, S, Taylor, D J, Tedeschi, U, Thoma, R, Thompson, L, Todor, C, Tur, M, Ungaro, M F, Vineyard, A V, Vlassov, K, Wang, H, Weller, D P, Weygand, C S, Whisnant, E, Wolin, M H, Wood, A, Yegneswaran, J, Yun, and B, Zhang
Subjects: SHORT-RANGE CORRELATIONS, KNOCKOUT, NUCLEI, HE-3, O-16, KNOCKOUT, NUCLEI, SHORT-RANGE CORRELATIONS, O-16, HE-3
Abstract: We have measured the 3He(e,e'pp)n reaction at 2.2 GeV over a wide kinematic range. The kinetic energy distribution for "fast" nucleons (p250 MeV/c) peaks where two nucleons each have 20% or less, and the third nucleon has most of the transferred energy. These fast pp and pn pairs are back to back with little momentum along the three-momentum transfer, indicating that they are spectators. Calculations by Sargsian and by Laget also indicate that we have measured distorted two-nucleon momentum distributions by striking one nucleon and detecting the spectator correlated pair.
Published: 2004

278. Electroproduction of Strangeness on Light Nuclei

Author: F. DOHRMANN, D. ABBOTT, A. AHMIDOUCH, P. AMBROZEWICZ, C.S. ARMSTRONG, J. ARRINGTON, R. ASATURYAN, K. ASSAMAGAN, S. AVERY, K. BAILEY, O.K. BAKER, S. BEEDOE, H. BITAO, H. BREUER, D.S. BROWN, R. CARLINI, J. CHA, N. CHANT, E. CHRISTY, A. COCHRAN, L. COLE, G. COLLINS, C. COTHRAN, J. CROWDER, W.J. CUMMINGS, S. DANAGOULIAN, F. DUNCAN, J. DUNNE, D. DUTTA, T. EDEN, M. ELAASAR, R. ENT, L. EWELL, H. FENKER, H.T. FORTUNE, Y. FUJII, L. GAN, H. GAO, K. GARROW, D.F. GEESAMAN, P. GUEYE, K. GUSTAFSSON, K. HAFIDI, J.O. HANSEN, W. HINTON, H.E. JACKSON, H. JUENGST, C. KEPPEL, A. KLEIN, D. KOLTENUK, Y. LIANG, J.H. LIU, A. LUNG, D. MACK, R. MADEY, P. MARKOWITZ, C.J. MARTOFF, D. MEEKINS, J. MITCHELL, T. MIYOSHI, H. MKRTCHYAN, R. MOHRING, S.K. MTINGWA, B. MUELLER, T.G. O’NEILL, G. NICULESCU, I. NICULESCU, D. POTTERVELD, J.W. PRICE, B.A. RAUE, P.E. REIMER, J. REINHOLD, J. ROCHE, P. ROOS, M. SARSOUR, Y. SATO, G. SAVAGE, R. SAWAFTA, R.E. SEGEL, A.YU. SEMENOV, S. STEPANYAN, V. TADEVOSIAN, S. TAJIMA, L. TANG, B. TERBURG, A. UZZLE, S. WOOD, H. YAMAGUCHI, C. YAN, L. YUAN, M. ZEIER, B. ZEIDMAN, and B. ZIHLMANN
Subjects: Physics, Light nucleus, Electroproduction, Nuclear Theory, Strangeness, Hyperons, Spectral function, Nuclear physics, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Nuclear Experiment, Hypernuclear boundstates, Electroproduction of strangeness, Nuclear targets
Abstract: The A(e,e'K+)YX reaction has been investigated in Hall C at Jefferson Laboratory for 6 different targets. Data were taken for Q2)approx 0.35 and 0.5 GeV2) at a beam energy of 3.245GeV for 1)H, 2)H, 3)He, 4)He, C and Al targets. The missing mass spectra are fitted with Monte Carlo simulations taking into account the production of Lambda and Sigma0) hyperon production off the proton, and Sigma-) off the neutron. Models for quasifree production are compared to the data, excess yields close to threshold are attributed to FSI. Evidence for Lambda-hypernuclear bound states is seen for 3,4)He targets.
Published: 2004

279. Proton Source Size Measurements in the eA->e'ppX Reaction

Author: A V, Stavinsky, K R, Mikhailov, R, Lednicky, A V, Vlassov, G, Adams, P, Ambrozewich, E, Anciant, M, Anghinolfi, B, Asavapibhop, G, Asryan, G, Audit, T, Auger, H, Avakian, H, Bagdasaryan, J P, Ball, S, Barrow, V, Batourine, M, Battaglieri, K, Beard, M, Bektasoglu, M, Bellis, N, Benmouna, N, Bianchi, A S, Biselli, S, Boiarinov, B E, Bonner, S, Bouchigny, R, Bradford, D, Branford, W K, Brooks, V D, Burkert, C, Butuceanu, J R, Calarco, D S, Carman, C, Cetina, S, Chen, P L, Cole, D, Cords, A, Coleman, P, Corvisiero, D, Crabb, J P, Cummings, N, Dashyan, E De, Sanctis, R De, Vita, P V, Degtyarenko, H, Denizli, L, Dennis, A, Deur, K V, Dharmawardane, C, Djalali, G E, Dodge, D, Doughty, P, Dragovitsch, M, Dugger, S, Dytman, O P, Dzyubak, H, Egiyan, K S, Egiyan, L, Elouadrhiri, A, Empl, P, Eugenio, R, Fatemi, R G, Fersch, R J, Feuerbach, T A, Forest, H, Funsten, M, Garçon, G, Gavalian, S, Gilad, G P, Gilfoyle, K L, Giovanetti, P, Girard, C I O, Gordon, R W, Gothe, K, Griffioen, M, Guidal, M, Guillo, N, Guler, L, Guo, V, Gyurjyan, C, Hadjidakis, R S, Hakobyan, J, Hardie, D, Heddle, F W, Hersman, K, Hicks, I, Hleiqawi, M, Holtrop, J, Hu, C E, Hyde-Wright, D G, Ireland, M M, Ito, D, Jenkins, K, Joo, H G, Juengst, J H, Kelley, J D, Kellie, M, Khandaker, D H, Kim, K Y, Kim, K, Kim, M S, Kim, W, Kim, A, Klein, F J, Klein, A V, Klimenko, M, Klusman, M V, Kossov, L H, Kramer, V, Kubarovski, S E, Kuhn, J, Kuhn, J, Lachniet, J M, Laget, J, Langheinrich, D, Lawrence, G A, Leksin, T, Lee, Ji, Li, K, Livingston, K, Lukashin, J J, Manak, C, Marchand, S, McAleer, J W C, McNabb, B A, Mecking, S, Mehrabyan, J J, Melone, M D, Mestayer, C A, Meyer, M, Mirazita, R, Miskimen, V, Mokeev, L, Morand, S A, Morrow, V, Muccifora, J, Mueller, G S, Mutchler, J, Napolitano, R, Nasseripour, S O, Nelson, S, Niccolai, G, Niculescu, I, Niculescu, B B, Niczyporuk, R A, Niyazov, M, Nozar, G V, O'Rielly, M, Osipenko, A I, Ostrovidov, K, Park, E, Pasyuk, G, Peterson, S A, Philips, N A, Pivnyuk, D, Pocanic, O, Pogorelko, E, Polli, S, Pozdniakov, B M, Preedom, J W, Price, Y, Prok, D, Protopopescu, L M, Qin, B A, Raue, G, Riccardi, G, Ricco, M, Ripani, B G, Ritchie, F, Ronchetti, G, Rosner, P, Rossi, D, Rowntree, P D, Rubin, F, Sabatié, K, Sabourov, C, Salgado, J P, Santoro, V, Sapunenko, R A, Schumacher, V S, Serov, Y G, Sharabian, J, Shaw, S, Simionatto, A V, Skabelin, E S, Smith, L C, Smith, D I, Sober, M, Spraker, S, Stepanyan, S S, Stepanyan, B E, Stokes, P, Stoler, I I, Strakovsky, M, Taiuti, S, Taylor, D J, Tedeschi, U, Thoma, R, Thompson, A, Tkabladze, L, Todor, C, Tur, M, Ungaro, M F, Vineyard, L S, Vorobeyev, K, Wang, L B, Weinstein, H, Weller, D P, Weygand, C S, Whisnant, M, Williams, E, Wolin, M H, Wood, A, Yegneswaran, J, Yun, and L, Zana
Subjects: INTERFEROMETRY, DRIFT CHAMBER, COLLISIONS, NUCLEI, CLAS, PARTICLES, SCATTERING, SPECTROMETER, SMALL RELATIVE MOMENTA, DRIFT CHAMBER, CLAS, NUCLEI, COLLISIONS, PARTICLES, INTERFEROMETRY, SPECTROMETER, CALORIMETER, SCATTERING, SMALL RELATIVE MOMENTA, CALORIMETER
Abstract: Two-proton correlations at small relative momentum q were studied in the eA(3He,4He,C,Fe)--e(')ppX reaction at E(0)=4.46 GeV using the CLAS detector at Jefferson Lab. The enhancement of the correlation function at small q was found to be in accordance with theoretical expectations. Sizes of the emission region were extracted, and proved to be dependent on A and on the proton momentum. The size of the two-proton emission region for He was measured in eA reactions for the first time.
Published: 2004

280. Complete Angular Distribution Measurements of Two-Body Deuteron Photodisintegration between 0.5 and 3 GeV

Author: Philip L. Cole, Moshe Gai, J. J. Melone, Friedrich Klein, William Bertozzi, P. Stoler, R. S. Hicks, Brian Raue, K. Hicks, E. Anciant, J. W C McNabb, B. M. Preedom, K. S. Egiyan, L. Todor, D. Protopopescu, I. I. Strakovsky, G. Gavalian, S. Pozdniakov, K. Mikhailov, L.C. Dennis, Z. L. Zhou, B. L. Berman, Y. Ilieva, Nicola Bianchi, J. P. Santoro, M. M. Ito, J. Shaw, J. Kuhn, V. Mokeev, L. M. Qin, J. P. Cummings, Alexei V. Klimenko, A.V. Stavinsky, K. Livingston, B. B. Niczyporuk, Michael Wood, Roy Thompson, M. Khandaker, L. C. Smith, A. V. Skabelin, R. A. Schumacher, G. A. Peterson, W. K. Brooks, G. S. Mutchler, N. Pivnyuk, J. R. Calarco, J. Napolitano, Bernhard Mecking, S. Barrow, Susan Taylor, R. A. Miskimen, V. S. Serov, O. P. Dzyubak, M. Kossov, K. Wang, K. V. Dharmawardane, John T. O'Brien, Barry Ritchie, D. J. Tedeschi, S. A. Morrow, C. Salgado, C. Djalali, M. Klusman, D. Branford, H. Egiyan, Rakhsha Nasseripour, F. Ronchetti, B. E. Bonner, Shalev Gilad, S. McAleer, J. S. McCarthy, M. Mirazita, P. Ambrozewicz, J. M. Laget, P. Eugenio, P. Corvisiero, C. I O Gordon, Elton Smith, M. Taiuti, H. Avakian, S. A. Philips, J. R. Ficenec, K. A. Griffioen, S. Simionatto, C. S. Whisnant, W. Kim, L. Morand, T. A. Forest, M. Anghinolfi, E. De Sanctis, H. Denizli, M. Battaglieri, V. Gyurjyan, H. R. Weller, James Mueller, A. I. Ostrovidov, A. C S Lima, K. L. Giovanetti, B. Asavapibhop, D. I. Sober, B. Carnahan, P. D. Rubin, M. Spraker, Larry Weinstein, Avraham Klein, Airton Deppman, Y. G. Sharabian, R. Bradford, R. J. Feuerbach, P. Dragovitsch, Michael Vineyard, D. Doughty, J. W. Price, Baile Zhang, Latifa Elouadrhiri, M. Guidal, J. Lachniet, S. Niccolai, W. J. Briscoe, S. Strauch, G. Niculescu, D. Heddle, D. Rowntree, Volker D. Burkert, A. S. Biselli, S. Stepanyan, Sylvain Bouchigny, C. A. Meyer, Hall Crannell, Shifeng Chen, V. Sapunenko, Valeria Muccifora, M. Guillo, H. Bagdasaryan, K. Y. Kim, E. Pasyuk, J. Hardie, S. A. Dytman, C. Marchand, A. Tkabladze, R. Fatemi, M. Holtrop, A. V. Vlassov, Gerard Gilfoyle, D. P. Weygand, G. E. Dodge, P. Rossi, Ji Li, R. S. Hakobyan, G. V. O'Rielly, P. V. Degtyarenko, K. Kim, J. Hu, R. De Vita, E. Polli, Daniel S. Carman, D. G. Jenkins, M. Osipenko, I. Niculescu, F. Sabatié, G. Rosner, J. J. Manak, M. D. Mestayer, D. Lawrence, Dinko Pocanic, G. Audit, C. E. Hyde-Wright, M. Bellis, K. Park, K. Beard, Kalvir S. Dhuga, M. Bektasoglu, M. Nozar, Laird Kramer, L. Guo, M. Ungaro, S. Boiarinov, S. E. Kuhn, A. Empl, O. Pogorelko, R. A. Niyazov, J. Yun, D. Cords, A. Yegneswaran, K. Lukashin, B. E. Stokes, F. W. Hersman, G. S. Adams, C. Tur, K. Joo, U. Thoma, E. Wolin, Cynthia Marie Hadjidakis, J. P. Ball, Y. Prok, Michael Dugger, H. O. Funsten, D. G. Crabb, N. Benmouna, M. Ripani, J. D. Kellie, S. Mehrabyan, G. Riccardi, C. Butuceanu, G. Ricco, 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 Robert, Suzanne
Subjects: Quark, Nuclear and High Energy Physics, Particle physics, Photon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Theory, FOS: Physical sciences, Few-body systems, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, QC, Quantum chromodynamics, Physics, 010308 nuclear & particles physics, Gluon, High Energy Physics - Phenomenology, Cover (topology), Photodisintegration, Physics::Accelerator Physics, High Energy Physics::Experiment, Energy (signal processing)
Abstract: Nearly complete angular distributions of the two-body deuteron photodisintegration differential cross section have been measured using the CLAS detector and the tagged photon beam at JLab. The data cover photon energies between 0.5 and 3.0 GeV and center-of-mass proton scattering angles 10-160 degrees. The data show a persistent forward-backward angle asymmetry over the explored energy range, and are well-described by the non-perturbative Quark Gluon String Model., Comment: Submitted to PRC; 14 pages, 9 figures, 2 tables
Published: 2004
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281. Measurement of beam-spin asymmetries for π+ electroproduction above the baryon resonance region

Author: K. V. Dharmawardane, Cynthia Marie Hadjidakis, Michael Dugger, H. O. Funsten, M. Battaglieri, R. Bradford, B. A. Mecking, J. Hu, R. A. Miskimen, Clarisse Tur, D. Branford, M. Mirazita, J. M. Laget, G. Ricco, J. P. Santoro, Roy Thompson, R. J. Feuerbach, B. Carnahan, G. S. Adams, K. A. Griffioen, K. Joo, Philip L. Cole, J. P. Cummings, F. Sabatié, Jing Zhao, E. DeSanctis, M. Kossov, I. I. Strakovsky, P. Heimberg, J. D. Kellie, F. W. Hersman, Thierry Auger, W. Kim, M. Spraker, C. Cetina, D. I. Sober, Rakhsha Nasseripour, R. S. Hicks, R. A. Schumacher, Brian Raue, P. Eugenio, M. Taiuti, Michael Vineyard, A.V. Stavinsky, V. Gyurjyan, N. Benmouna, M. Ripani, K. Livingston, B. M. Preedom, L. Ciciani, Carlos A. Salgado, J. Lachniet, M. M. Ito, Daniel S. Carman, V. Sapunenko, R. Fatemi, Valeria Muccifora, W. K. Brooks, D. Rowntree, D. J. Tedeschi, G. Audit, S. Simionatto, L. C. Smith, A. V. Vlassov, C. E. Hyde-Wright, G. S. Mutchler, H. Bagdasaryan, S. J. Gaff, J. W. Price, Min Suk Kim, Gerard Gilfoyle, L. Guo, M. Ungaro, K. Y. Kim, H. Egiyan, J. J. Melone, K. L. Giovanetti, B. Asavapibhop, L. M. Qin, D. S. Armstrong, K. Wang, G. A. Peterson, Laird Kramer, Larry Weinstein, J. R. Calarco, D. Doughty, R. S. Hakobyan, Andreas Klein, Shalev Gilad, S. Barrow, Alexei V. Klimenko, Y. Ilieva, C. S. Whisnant, D. Heddle, Barry Ritchie, C. I O Gordon, M. Nozar, L. Morand, Ji Li, M. Bektasoglu, U. Thoma, M. Klusman, A. Longhi, J. Yun, D. Cords, Federico Ronchetti, A. Yegneswaran, E. Wolin, T. A. Forest, M. D. Mestayer, J. J. Manak, S. Stepanyan, A. Coleman, P. Dragovitsch, J. P. Ball, Y. Prok, M. Eckhause, H. R. Weller, E. Anciant, Nicola Bianchi, Andrei Afanasev, M. Sargsyan, H. Denizli, Baile Zhang, S. Niccolai, Sylvain Bouchigny, S. Boiarinov, L. Todor, D. Protopopescu, M. Khandaker, K. Park, D. G. Crabb, M. Guillo, A. K. Opper, J. Hardie, P. Rossi, S. Pozdniakov, M. Osipenko, Z. L. Zhou, A. V. Skabelin, Volker D. Burkert, A. S. Biselli, O. P. Dzyubak, R. A. Niyazov, Y. Kuang, K. Beard, Latifa Elouadrhiri, S. Mehrabyan, G. E. Dodge, R. C. Minehart, E. Polli, C. A. Meyer, Dinko Pocanic, P. V. Degtyarenko, K. Kim, P. Corvisiero, G. Riccardi, G. Gavalian, S. E. Kuhn, D. P. Weygand, M. Guidal, G. Niculescu, Daijin Kim, C. Butuceanu, J. H. Kelley, M. Holtrop, Stephen Taylor, B. B. Niczyporuk, Elton Smith, J. R. Ficenec, N. Pivnyuk, I. Niculescu, K. Lukashin, P. Stoler, M. Anghinolfi, J. Napolitano, D. Lawrence, James Mueller, Y. G. Sharabian, S. O. Nelson, K. Hicks, Hall Crannell, R. DeVita, J. W C McNabb, C. Marchand, S. A. Morrow, P. Rubin, C. Djalali, K. S. Egiyan, P. Ambrozewicz, K. Mikhailov, S. McAleer, S. Strauch, G. V. O'Rielly, D. G. Jenkins, K. Sabourov, M. Bellis, V. P. Kubarovsky, A. Empl, O. Pogorelko, Frank Klein, Patrick Girard, J. Shaw, Michael Wood, V. S. Serov, L. C. Dennis, B. E. Bonner, H. Avakian, E. Pasyuk, and S. A. Dytman
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Proton, Resonance, Virtual particle, Nuclear physics, Momentum, Baryon, Amplitude, Pion, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment, Spin-½
Abstract: We report the first evidence for a nonzero beam-spin azimuthal asymmetry in the electroproduction of positive pions in the deep-inelastic kinematic region. Data for the reaction ep→e'pi(+)X have been obtained using a polarized electron beam of 4.3 GeV with the CEBAF Large Acceptance Spectrometer at the Thomas Jefferson National Accelerator Facility. The amplitude of the sin phi modulation increases with the momentum of the pion relative to the virtual photon, z. In the range z=0.5-0.8 the average amplitude is 0.038+/-0.005+/-0.003 for a missing mass M-X gt 1.1 GeV and 0.037+/-0.007+/-0.004 for M-X gt 1.4 GeV
Published: 2004

282. Quasielastic(e,e′p)reaction onC12,Fe56, andAu197

Author: D. Dutta, D. van Westrum, D. Abbott, A. Ahmidouch, Ts. A. Amatuoni, C. Armstrong, J. Arrington, K. A. Assamagan, K. Bailey, O. K. Baker, S. Barrow, K. Beard, D. Beatty, S. Beedoe, E. Beise, E. Belz, C. Bochna, P. E. Bosted, H. Breuer, E. E. W. Bruins, R. Carlini, J. Cha, N. Chant, C. Cothran, W. J. Cummings, S. Danagoulian, D. Day, D. DeSchepper, J.-E. Ducret, F. Duncan, J. Dunne, T. Eden, R. Ent, H. T. Fortune, V. Frolov, D. F. Geesaman, H. Gao, R. Gilman, P. Guèye, J. O. Hansen, W. Hinton, R. J. Holt, C. Jackson, H. E. Jackson, C. Jones, S. Kaufman, J. J. Kelly, C. Keppel, M. Khandaker, W. Kim, E. Kinney, A. Klein, D. Koltenuk, L. Kramer, W. Lorenzon, A. Lung, K. McFarlane, D. J. Mack, R. Madey, P. Markowitz, J. Martin, A. Mateos, D. Meekins, M. A. Miller, R. Milner, J. Mitchell, R. Mohring, H. Mkrtchyan, A. M. Nathan, G. Niculescu, I. Niculescu, T. G. O’Neill, D. Potterveld, J. W. Price, J. Reinhold, C. Salgado, J. P. Schiffer, R. E. Segel, P. Stoler, R. Suleiman, V. Tadevosyan, L. Tang, B. Terburg, T. P. Welch, C. Williamson, S. Wood, C. Yan, J.-C. Yang, J. Yu, B. Zeidman, W. Zhao, and B. Zihlmann
Subjects: Physics, Nuclear and High Energy Physics, Mathematical physics
Published: 2003

283. Measurement of the Proton Spin Structure Functiong1(x,Q2)forQ2from 0.15 to1.6 GeV2with CLAS

Author: S. J. Gaff, D. Doughty, M. Seely, G. Ricco, D. Heddle, R. J. Feuerbach, Philip L. Cole, C. S. Whisnant, L. Farhi, Bernhard Mecking, V. Sapunenko, Dinko Pocanic, Valeria Muccifora, K. V. Dharmawardane, C. D. Keith, P. Eugenio, Shalev Gilad, M. Taiuti, M. Guillo, Gerard Gilfoyle, S. E. Kuhn, R. A. Niyazov, John T. O'Brien, S. Strauch, Friedrich Klein, L. C. Dennis, B. E. Bonner, B. Carnahan, F. Sabatié, W. K. Brooks, L. M. Qin, P. Corvisiero, J. H. Kelley, R. S. Hicks, Brian Raue, Jing Zhao, William Bertozzi, C. Tur, S. Mehrabyan, D. Protopopescu, J. P. Cummings, H. R. Weller, Volker D. Burkert, C. Cetina, A. S. Biselli, S. Pozdniakov, M. Garçon, Thierry Auger, J. R. Calarco, F. W. Hersman, K. S. Egiyan, V. Koubarovski, K. Mikhailov, E. Anciant, Michael Vineyard, Baile Zhang, E. Pasyuk, B. M. Preedom, G. V. O'Rielly, L. Elouadrhiri, Z. L. Zhou, C. Butuceanu, M. Kossov, W. Kim, E. Wolin, R. A. Miskimen, S. A. Dytman, M. Ripani, J. P. Santoro, C. E. Hyde-Wright, J. Hu, D. Branford, Rakhsha Nasseripour, M. Khandaker, A. V. Skabelin, G. S. Mutchler, D. G. Jenkins, Susan Taylor, H. Egiyan, K. Sabourov, J. P. Ball, Y. Prok, M. Eckhause, M. Sargsyan, D. G. Crabb, M. Spraker, Y. Ilieva, Patrick Girard, J. Shaw, Michael Wood, M. Mirazita, J. M. Laget, K. Wang, C. Salgado, P. E. Bosted, A. P. Freyberger, Harut Avakian, Y. Kuang, K. Y. Kim, C. Marchand, Laird Kramer, V. S. Serov, S. McAleer, E. Polli, M. Battaglieri, M. Bellis, K. Park, Federico Ronchetti, K. A. Griffioen, Roy Thompson, V. Frolov, Elton Smith, M. Guidal, R. Bradford, M. M. Ito, J. Ficenec, G. Niculescu, L. Ciciani, A. Longhi, M. Klusman, Ji Li, L. Todor, R. Clark, P. Heimberg, Jens H. Kuhn, M. Holtrop, Thomas E. Smith, M. Anghinolfi, M. D. Mestayer, A. Empl, O. Pogorelko, S. Simionatto, J. D. Kellie, S. Stepanyan, Nicola Bianchi, K. Lukashin, Sylvain Bouchigny, K. Livingston, James Mueller, H. Funsten, Cynthia Marie Hadjidakis, K. L. Giovanetti, B. Asavapibhop, P. Rossi, S. Boiarinov, P. D. Rubin, J. W. Price, Michael Dugger, Larry Weinstein, M. Osipenko, Y. G. Sharabian, H. Denizli, Daniel S. Carman, G. Audit, K. Beard, G. A. Peterson, J. Connelly, Kalvir S. Dhuga, Alexei V. Klimenko, S. Barrow, M. Bektasoglu, G. Gavalian, Barry Ritchie, M. Nozar, R. C. Minehart, C. A. Meyer, P. Stoler, S. O. Nelson, K. Hicks, R. Fatemi, A. V. Vlassov, R. De Vita, J. J. Manak, E. De Sanctis, D. I. Sober, A.V. Stavinsky, L. Sorrel, D. J. Tedeschi, V. Gyurjyan, H. Bagdasaryan, D. Hancock, L. Guo, M. Ungaro, P. Dragovitsch, S. Niccolai, K. Joo, J. Yun, J. Hardie, D. Cords, A. Yegneswaran, G. E. Dodge, P. V. Degtyarenko, K. Kim, I. Niculescu, D. Lawrence, R. A. Schumacher, J. Lachniet, D. Rowntree, C. I O Gordon, L. Morand, T. A. Forest, A. Coleman, B. B. Niczyporuk, N. Pivnyuk, S. E. Rock, Avraham Klein, J. Napolitano, W. Major, G. S. Adams, Hall Crannell, G. Riccardi, J. W C McNabb, S. A. Morrow, C. Djalali, U. Thoma, D. P. Weygand, and L. C. Smith
Subjects: Physics, Nuclear physics, Particle physics, Scattering, Proton spin crisis, General Physics and Astronomy, Electron, Nucleon, Parametrization, Resonance (particle physics), Scaling, Sign (mathematics)
Abstract: Double-polarization asymmetries for inclusive $ep$ scattering were measured at Jefferson Lab using 2.6 and 4.3 GeV longitudinally polarized electrons incident on a longitudinally polarized NH$_3$ target in the CLAS detector. The polarized structure function $g_1(x,Q^2)$ was extracted throughout the nucleon resonance region and into the deep inelastic regime, for $Q^2 = 0.15 -1.64 $GeV$^2$. The contributions to the first moment $\Gamma_1(Q^2) = \int g_1(x,Q^2)dx$ were determined up to $Q^2=1.2$ GeV$^2$. Using a parametrization for $g_1$ in the unmeasured low $x$ regions, the complete first moment was estimated over this $Q^2$ region. A rapid change in $\Gamma_1$ is observed for $Q^2 < 1 $GeV$^2$, with a sign change near $Q^2 = 0.3 $GeV$^2$, indicating dominant contributions from the resonance region. At $Q^2=1.2$ GeV$^2$ our data are below the pQCD evolved scaling value.
Published: 2003

284. Measurement of the polarized structure functionσLT′forp(e→,e′p)π0in theΔ(1232)resonance region

Author: Susan Taylor, W. Kim, J. Kuhn, C. S. Whisnant, D. I. Sober, Laird Kramer, Roy Thompson, Daniel S. Carman, H. Denizli, R. J. Feuerbach, G. Audit, C. E. Hyde-Wright, P. Eugenio, M. Taiuti, S. Strauch, J. Hu, S. McAleer, G. A. Peterson, Cynthia Marie Hadjidakis, L. C. Dennis, M. Nozar, Dinko Pocanic, H. Avakian, Michael Dugger, L. Guo, S. Barrow, M. Guidal, Alexei V. Klimenko, H. O. Funsten, R. Fatemi, M. Ungaro, S. E. Kuhn, G. Niculescu, E. Anciant, A. V. Vlassov, M. Osipenko, A. C S Lima, L. M. Qin, W. J. Briscoe, E. Pasyuk, M. Holtrop, J. H. Kelley, C. Tur, L. Y. Murphy, K. Beard, S. A. Dytman, G. Ricco, Barry Ritchie, Kalvir S. Dhuga, P. Dragovitsch, Volker D. Burkert, A. S. Biselli, J. P. Cummings, L. Todor, Jing Zhao, G. Gavalian, M. Klusman, M. Bektasoglu, J. W. Price, Philip L. Cole, D. Protopopescu, S. Niccolai, Elton Smith, E. Wolin, S. Pozdniakov, M. Kossov, M. Anghinolfi, S. A. Philips, J. Hardie, J. J. Melone, Friedrich Klein, Z. L. Zhou, Rakhsha Nasseripour, James Mueller, K. Y. Kim, M. Khandaker, R. S. Hicks, Brian Raue, P. D. Rubin, N. Benmouna, M. Guillo, M. Ripani, Y. G. Sharabian, J. P. Ball, Y. Prok, M. Eckhause, O. P. Dzyubak, R. A. Niyazov, A.V. Stavinsky, J. J. Manak, G. V. O'Rielly, A. K. Opper, Hovanes Egiyan, B. Carnahan, D. J. Tedeschi, F. Sabatié, Hall Crannell, D. G. Jenkins, A. V. Skabelin, Y. Kuang, M. Sargsyan, Y. Ilieva, K. Sabourov, Thierry Auger, G. S. Mutchler, J. Ficenec, E. Polli, L. Ciciani, F. W. Hersman, K. Joo, Federico Ronchetti, R. C. Minehart, C. A. Meyer, S. Simionatto, J. Yun, P. Corvisiero, D. Cords, D. G. Crabb, C. Cetina, L. Elouadrhiri, A. Yegneswaran, V. Sapunenko, Valeria Muccifora, Michael Vineyard, I. I. Strakovsky, K. L. Giovanetti, B. Asavapibhop, K. S. Egiyan, W. K. Brooks, M. Spraker, Larry Weinstein, E. DeSanctis, D. Doughty, Gerard Gilfoyle, K. Mikhailov, D. Heddle, V. Gyurjyan, S. Mehrabyan, H. Bagdasaryan, Nicola Bianchi, R. A. Miskimen, D. P. Weygand, Ji Li, Shalev Gilad, G. Riccardi, G. E. Dodge, P. Stoler, D. Branford, M. Mirazita, J. M. Laget, C. Butuceanu, S. O. Nelson, K. Hicks, M. D. Mestayer, P. V. Degtyarenko, K. Kim, S. Boiarinov, G. S. Adams, B. M. Preedom, R. DeVita, K. A. Griffioen, J. W C McNabb, U. Thoma, I. Niculescu, J. Lachniet, D. Rowntree, D. Lawrence, J. P. Santoro, P. Heimberg, R. S. Hakobyan, R. A. Schumacher, K. Wang, C. Salgado, C. I O Gordon, L. Morand, B. B. Niczyporuk, T. A. Forest, S. Stepanyan, N. Pivnyuk, K. Lukashin, J. Napolitano, Avraham Klein, S. A. Morrow, C. Djalali, P. Ambrozewicz, M. Battaglieri, R. Bradford, M. U. Mozer, Bernhard Mecking, K. V. Dharmawardane, M. M. Ito, A. Coleman, H. R. Weller, L. C. Smith, S. J. Gaff, C. Marchand, Patrick Girard, J. Shaw, Michael Wood, Sylvain Bouchigny, V. S. Serov, P. Rossi, M. Bellis, K. Park, J. R. Calarco, A. Empl, and O. Pogorelko
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Pion, Nuclear magnetic resonance, Structure function, Pole term, Isobar, Resonance, Electron, Nuclear Experiment, Energy (signal processing)
Abstract: The polarized longitudinal-transverse structure function ${\ensuremath{\sigma}}_{L{T}^{\ensuremath{'}}}$ has been measured using the $p(\stackrel{P\vec}{e},{e}^{\ensuremath{'}}{\ensuremath{\pi}}^{+})n$ reaction in the $\ensuremath{\Delta}(1232)$ resonance region at ${Q}^{2}=0.40$ and $0.65\phantom{\rule{0.3em}{0ex}}{\mathrm{GeV}}^{2}$. No previous ${\ensuremath{\sigma}}_{L{T}^{\ensuremath{'}}}$ data exist for this reaction channel. The kinematically complete experiment was performed at the Jefferson Lab with the CEBAF large acceptance spectrometer using longitudinally polarized electrons at an energy of $1.515\phantom{\rule{0.3em}{0ex}}\mathrm{GeV}$. A partial-wave analysis of the data shows generally better agreement with recent phenomenological models of pion electroproduction compared to the previously measured ${\ensuremath{\pi}}^{0}p$ channel. A fit to both ${\ensuremath{\pi}}^{0}p$ and ${\ensuremath{\pi}}^{+}n$ channels using a unitary isobar model suggests the unitarized Born terms provide a consistent description of the nonresonant background. The $t$-channel pion pole term is important in the ${\ensuremath{\pi}}^{0}p$ channel through a rescattering correction, which could be model dependent.
Published: 2003

285. Measurement of the electric form factor of the neutron at Q2=0.5 and 1.0 GeV2/c2

Author: G, Warren, F, Wesselmann, H, Zhu, P, McKee, N, Savvinov, M, Zeier, A, Aghalaryan, A, Ahmidouch, H, Arenhövel, R, Asaturyan, I, Ben-Dayan, F, Bloch, W, Boeglin, B, Boillat, H, Breuer, J, Brower, C, Carasco, M, Carl, R, Carlini, J, Cha, N, Chant, E, Christy, L, Cole, L, Coman, M, Coman, D, Crabb, S, Danagoulian, D, Day, K, Duek, J, Dunne, M, Elaasar, R, Ent, J, Farrell, R, Fatemi, D, Fawcett, H, Fenker, T, Forest, K, Garrow, A, Gasparian, I, Goussev, P, Gueye, M, Harvey, M, Hauger, R, Herrera, B, Hu, I, Jaegle, M, Jones, J, Jourdan, C, Keith, J, Kelly, C, Keppel, M, Khandaker, A, Klein, A, Klimenko, L, Kramer, B, Krusche, S, Kuhn, Y, Liang, J, Lichtenstadt, R, Lindgren, J, Liu, A, Lung, D, Mack, G, Maclachlan, P, Markowitz, D, McNulty, D, Meekins, J, Mitchell, H, Mkrtchyan, R, Nasseripour, I, Niculescu, K, Normand, B, Norum, A, Opper, E, Piasetzky, J, Pierce, M, Pitt, Y, Prok, B, Raue, J, Reinhold, J, Roche, D, Rohe, O, Rondon, D, Sacker, B, Sawatzky, M, Seely, I, Sick, N, Simicevic, C, Smith, G, Smith, M, Steinacher, S, Stepanyan, J, Stout, V, Tadevosyan, S, Tajima, L, Tang, G, Testa, R, Trojer, B, Vlahovic, B, Vulcan, K, Wang, S, Wells, H, Woehrle, S, Wood, C, Yan, Y, Yanay, L, Yuan, J, Yun, and B, Zihlmann
Abstract: The electric form factor of the neutron was determined from measurements of the d--(e--,e'n)p reaction for quasielastic kinematics. Polarized electrons were scattered off a polarized deuterated ammonia (15ND3) target in which the deuteron polarization was perpendicular to the momentum transfer. The scattered electrons were detected in a magnetic spectrometer in coincidence with neutrons in a large solid angle detector. We find G(n)(E)=0.0526+/-0.0033(stat)+/-0.0026(sys) and 0.0454+/-0.0054+/-0.0037 at Q(2)=0.5 and 1.0 (GeV/c)(2), respectively.
Published: 2003

286. Observation of nuclear scaling in theA(e,e′)reaction atxB>1

Author: K. Mikhailov, P. Eugenio, R. J. Feuerbach, M. Taiuti, A. Weisberg, Patrick Girard, J. Shaw, Michael Wood, V. S. Serov, Laird Kramer, R. A. Schumacher, A. Coleman, G. Asryan, K. A. Griffioen, M. U. Mozer, O. P. Dzyubak, R. A. Niyazov, L. C. Dennis, B. E. Bonner, Bernhard Mecking, P. Corvisiero, K. V. Dharmawardane, H. Avakian, P. Stoler, S. O. Nelson, K. Hicks, P. Heimberg, C. I O Gordon, W. J. Briscoe, Susan Taylor, Jing Zhao, E. Pasyuk, S. A. Dytman, A.V. Stavinsky, M. Guidal, L. C. Maximon, M. Battaglieri, Volker D. Burkert, A. S. Biselli, L. Morand, T. A. Forest, M. Guillo, H. Denizli, C. S. Whisnant, M. Bektasoglu, J. Kuhn, D. J. Tedeschi, M. Bellis, K. Park, Hovanes Egiyan, G. Niculescu, Daijin Kim, Elton Smith, Shalev Gilad, Avraham Klein, G. V. O'Rielly, Roy Thompson, R. A. Miskimen, R. Bradford, K. Lukashin, J. Lachniet, J. S. McCarthy, G. Ricco, D. Rowntree, A. Empl, O. Pogorelko, I. I. Strakovsky, M. Anghinolfi, J. P. Cummings, E. DeSanctis, D. Branford, D. G. Jenkins, M. Mirazita, K. Sabourov, J. M. Laget, Philip L. Cole, S. Strauch, J. Connelly, M. Holtrop, James Mueller, R. S. Hakobyan, Moshe Gai, Misak Sargsian, Ivan Bedlinski, U. Thoma, J. J. Melone, Friedrich Klein, P. D. Rubin, M. Kossov, V. Sapunenko, W. K. Brooks, Valeria Muccifora, L. M. Qin, Mark Strikman, A. V. Skabelin, P. Dragovitsch, G. S. Mutchler, R. S. Hicks, Brian Raue, G. Riccardi, Latifa Elouadrhiri, Rakhsha Nasseripour, Gerard Gilfoyle, S. McAleer, Y. G. Sharabian, S. Niccolai, J. Hu, M. Klusman, L. Guo, R. DeVita, M. Ungaro, J. Hardie, R. C. Minehart, C. A. Meyer, J. W C McNabb, N. Benmouna, M. Ripani, Dinko Pocanic, Cynthia Marie Hadjidakis, Michael Dugger, B. Carnahan, H. Funsten, J. W. Price, B. B. Niczyporuk, Daniel S. Carman, Thierry Auger, S. E. Kuhn, Alexei V. Klimenko, J. H. Kelley, N. Pivnyuk, K. Sh Egiyan, C. Tur, J. Napolitano, Barry Ritchie, G. Audit, C. E. Hyde-Wright, Baile Zhang, G. Gavalian, J. Yun, D. Cords, M. M. Ito, S. A. Morrow, C. Djalali, L. Todor, A. Yegneswaran, J. R. Calarco, L. C. Smith, R. A. Demirchyan, C. Marchand, F. W. Hersman, Y. Kuang, P. Ambrozewicz, S. Stepanyan, Sylvain Bouchigny, M. Nozar, P. Rossi, D. I. Sober, E. Polli, V. Gyurjyan, R. Fatemi, S. A. Philips, A. V. Vlassov, K. Y. Kim, H. Bagdasaryan, Min Suk Kim, J. J. Manak, H. R. Weller, M. Osipenko, F. Sabatié, K. Beard, Kalvir S. Dhuga, W. Kim, F. Ronchetti, J. Ficenec, L. Ciciani, S. Simionatto, K. L. Giovanetti, B. Asavapibhop, Larry Weinstein, D. Doughty, D. Heddle, E. Anciant, A. K. Opper, M. Khandaker, Y. Ilieva, Nicola Bianchi, Hall Crannell, G. S. Adams, D. Protopopescu, K. Joo, G. E. Dodge, S. Pozdniakov, Z. L. Zhou, P. V. Degtyarenko, K. Kim, D. P. Weygand, Ji Li, I. Niculescu, D. Lawrence, M. D. Mestayer, G. A. Peterson, S. Barrow, S. Boiarinov, B. M. Preedom, J. P. Santoro, E. Wolin, J. P. Ball, Y. Prok, M. Eckhause, D. G. Crabb, M. Spraker, K. Wang, N. Dashyan, C. Salgado, C. Cetina, Michael Vineyard, L. Y. Murphy, S. Mehrabyan, and C. Butuceanu
Subjects: Nuclear reaction, Physics, Nuclear and High Energy Physics, Helium-4, Helium-3, Nuclear Theory, Hadron, Carbon-12, Elementary particle, Atomic physics, Nuclear Experiment, Nucleon, Isotopes of helium
Abstract: The ratios of inclusive electron scattering cross sections of ${}^{4}\mathrm{He},$ ${}^{12}\mathrm{C},$ and ${}^{56}\mathrm{Fe}$ to ${}^{3}\mathrm{He}$ have been measured for the first time. It is shown that these ratios are independent of ${x}_{B}$ at ${Q}^{2}g1.4{\mathrm{GeV}}^{2}$ for ${x}_{B}g1.5,$ where the inclusive cross section depends primarily on the high momentum components of the nuclear wave function. The observed scaling shows that the momentum distributions at high-momenta have the same shape for all nuclei and differ only by a scale factor. The observed onset of the scaling at ${Q}^{2}g1.4{\mathrm{GeV}}^{2}$ and ${x}_{B}g1.5$ is consistent with the kinematical expectation that two-nucleon short range correlations (SRC) dominate the nuclear wave function at ${p}_{m}\ensuremath{\gtrsim}300\mathrm{MeV}/c.$ The values of these ratios in the scaling region can be related to the relative probabilities of SRC in nuclei with $Ag~3.$ Our data, combined with calculations and other measurements of the ${}^{3}\mathrm{H}\mathrm{e}/\mathrm{d}\mathrm{e}\mathrm{u}\mathrm{t}\mathrm{e}\mathrm{r}\mathrm{i}\mathrm{u}\mathrm{m}$ ratio, demonstrate that for nuclei with $Ag~12$ these probabilities are 4.9--5.9 times larger than in deuterium, while for ${}^{4}\mathrm{He}$ it is larger by a factor of about 3.8.
Published: 2003

287. Measurement ofep→e′pπ+π−and Baryon Resonance Analysis

Author: R. Fatemi, A. Cazes, M. U. Mozer, Bernhard Mecking, K. V. Dharmawardane, A. V. Vlassov, J. Hu, M. Battaglieri, R. Bradford, R. De Vita, E. Wolin, J. J. Manak, R. A. Niyazov, B. Carnahan, Jing Zhao, S. A. Philips, E. De Sanctis, Thierry Auger, D. I. Sober, Patrick Girard, J. Shaw, Michael Wood, P. Corvisiero, E. Golovach, J. P. Ball, Y. Prok, V. S. Serov, R. A. Schumacher, Daniel S. Carman, D. Protopopescu, S. Pozdniakov, M. Garçon, M. Eckhause, G. Ricco, G. Audit, Z. L. Zhou, A. Shafi, C. E. Hyde-Wright, Philip L. Cole, M. Taiuti, M. Ripani, Moshe Gai, Friedrich Klein, M. Bektasoglu, R. S. Hicks, Brian Raue, L. Morand, T. A. Forest, Roy Thompson, Avraham Klein, G. E. Dodge, S. A. Morrow, D. G. Crabb, I. I. Strakovsky, C. Djalali, P. V. Degtyarenko, K. Kim, G. S. Adams, B. M. Preedom, M. Spraker, M. Bellis, K. Park, B. L. Berman, I. Niculescu, K. Joo, D. Lawrence, J. P. Santoro, M. Klusman, E. Anciant, M. Guidal, G. Niculescu, W. K. Brooks, L. M. Qin, A. Empl, O. Pogorelko, K. Lukashin, B. E. Bonner, M. Holtrop, U. Thoma, H. Avakian, D. P. Weygand, Dinko Pocanic, Gerald Feldman, A. K. Opper, S. E. Kuhn, W. J. Briscoe, E. Pasyuk, K. Wang, F. W. Hersman, S. A. Dytman, R. A. Miskimen, J. H. Kelley, C. Salgado, M. Khandaker, M. Nozar, B. B. Niczyporuk, N. Pivnyuk, P. Stoler, D. Branford, J. Napolitano, Elton Smith, Ji Li, Cynthia Marie Hadjidakis, M. Mirazita, J. M. Laget, G. V. O'Rielly, Michael Dugger, S. O. Nelson, M. D. Mestayer, L. Elouadrhiri, K. Hicks, M. Anghinolfi, Laird Kramer, J. P. Cummings, James Mueller, S. Boiarinov, K. S. Egiyan, G. Riccardi, J. W C McNabb, V. Sapunenko, P. D. Rubin, F. Ronchetti, Y. G. Sharabian, Valeria Muccifora, K. Mikhailov, D. G. Jenkins, M. Kossov, K. Sabourov, Rakhsha Nasseripour, J. Ficenec, M. Guillo, Gerard Gilfoyle, L. Ciciani, Hall Crannell, W. Kim, Baile Zhang, R. C. Minehart, J. R. Calarco, C. A. Meyer, S. Simionatto, C. Cetina, Michael Vineyard, P. Dragovitsch, Volker D. Burkert, A. S. Biselli, G. V. Fedotov, Y. Kuang, L. Y. Murphy, E. Polli, K. Y. Kim, A. Longhi, S. Niccolai, S. McAleer, C. Marchand, K. L. Giovanetti, B. Asavapibhop, H. Funsten, S. Stepanyan, Sylvain Bouchigny, J. W. Price, P. Rossi, L.C. Dennis, M. M. Ito, L. Todor, J. Hardie, H. Denizli, Larry Weinstein, L. C. Smith, S. J. Gaff, B. S. Ishkhanov, B. P. Quinn, D. Doughty, H. R. Weller, Alexei V. Klimenko, Barry Ritchie, D. Heddle, M. Osipenko, F. Sabatié, K. Beard, A. V. Skabelin, G. Gavalian, V. Mokeev, G. S. Mutchler, K. A. Griffioen, P. Heimberg, J. D. Kellie, Shalev Gilad, R. J. Feuerbach, A.V. Stavinsky, D. J. Tedeschi, J. S. McCarthy, J. Lachniet, D. Rowntree, Jens H. Kuhn, L. Guo, M. Ungaro, Nicola Bianchi, A. Coleman, Susan Taylor, H. Egiyan, C. S. Whisnant, K. Livingston, G. A. Peterson, S. Barrow, J. Yun, D. Cords, A. Yegneswaran, V. Gyurjyan, and H. Bagdasaryan
Subjects: Baryon, Nuclear physics, Physics, Particle physics, Meson production, Resonance analysis, General Physics and Astronomy, Resonance (particle physics)
Abstract: The cross section for the reaction ep→e'ppi(+)pi(-) was measured in the resonance region for 1.4 lt W lt 2.1 GeV and 0.5 lt Q(2) lt 1.5 GeV2/c(2) using the CLAS detector at Jefferson Laboratory. The data show resonant structures not visible in previous experiments. The comparison of our data to a phenomenological prediction using available information on N* and Delta states shows an evident discrepancy. A better description of the data is obtained either by a sizable change of the properties of the P-13(1720) resonance or by introducing a new baryon state, not reported in published analyses.
Published: 2003

288. Separation of the longitudinal and transverse cross sections in the1H(e,e′K+)Λand1H(e,e′K+)Σ0reactions

Author: A. Ahmidouch, M. Harvey, S. Beedoe, T. P. Welch, John C. Mitchell, T. Eden, M. Maeda, S. Frullani, F. Duncan, A. F. Lung, K. Gustafsson, K. Kino, S. A. Wood, Paul Gueye, D. F. Geesaman, M. Finn, W. F. Vulcan, Brian Raue, Ts A. Amatuni, Guido Urciuoli, S. Mtingwa, J. A. Dunne, Christophe Furget, D. J. Mack, P. Ambrozewicz, F. Garibaldi, P. Stoler, V. Tadevosian, Kevin Bailey, H. Breuer, Stephen Avery, V. Frolov, H. Mkrtchyan, Terry Mart, T. Saito, D. Abbott, C. Yan, D. Koltenuk, C. C. Chang, S. Stepanyan, P. G. Roos, C. E. Keppel, W. Hinton, S. Danagoulian, W. Kim, J. Cha, Dipangkar Dutta, D. H. Potterveld, Rolf Ent, A. Mihul, G. Collins, D. G. Meekins, J. Arrington, E. V. Hungerford, C. S. Armstrong, E. Cisbani, L. Eyraud, R. Perrino, W. J. Cummings, Laird Kramer, J. Volmer, Hiroaki Tsubota, L. A. Ewell, E. J. Beise, S. Majewski, T. Angelescu, S. Kox, R. E. Segel, C. J. Martoff, B. Zeidman, G. Savage, Mauro Iodice, T. Terasawa, K. Beard, D. Gaskell, R. Mohring, L. Teodorescu, C. Jackson, R. Williams, J.-O. Hansen, I. Niculescu, Pete Markowitz, J. S. Real, R. De Leo, R. Madey, R. D. Carlini, J. W. Price, L. G. Tang, R. Sawafta, N. S. Chant, Ketevi Assamagan, J. Reinhold, T. Leone, and T. Fortune
Subjects: Physics, Nuclear and High Energy Physics, Meson production, 010308 nuclear & particles physics, Hyperon, Virtual particle, Lambda, 01 natural sciences, Transverse plane, 0103 physical sciences, Invariant mass, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract: We report measurements of cross sections for the reaction ${}^{1}\mathrm{H}{(e,e}^{\ensuremath{'}}{K}^{+})Y,$ for both the \ensuremath{\Lambda} and ${\ensuremath{\Sigma}}^{0}$ hyperon states, at an invariant mass of $W=1.84\mathrm{GeV}$ and four-momentum transfers $0.5l{Q}^{2}l2(\mathrm{GeV}{/c)}^{2}.$ Data were taken for three values of virtual photon polarization $\ensuremath{\epsilon},$ allowing the decomposition of the cross sections into longitudinal and transverse components. The \ensuremath{\Lambda} data are a revised analysis of prior work, whereas the ${\ensuremath{\Sigma}}^{0}$ results have not been previously reported.
Published: 2003

289. Kinematically complete measurement of the proton structure functionF2in the resonance region and evaluation of its moments

Author: W. Kim, Ji Li, E. Wolin, Baile Zhang, A. K. Opper, M. D. Mestayer, R. Fatemi, P. Bosted, J. P. Ball, Y. Prok, A. V. Vlassov, M. Eckhause, M. Sargsyan, Y. Kuang, J. P. Cummings, R. De Vita, E. De Sanctis, S. Boiarinov, D. I. Sober, D. G. Crabb, E. Polli, S. A. Philips, J. W C McNabb, J. Lachniet, D. Rowntree, M. Kossov, Rakhsha Nasseripour, K. Paschke, S. Mehrabyan, B. M. Preedom, M. M. Ito, H. Denizli, Elton Smith, K. S. Egiyan, J. J. Manak, G. Riccardi, B. Carnahan, M. Osipenko, J. R. Ficenec, J. R. Calarco, Shalev Gilad, Roy Thompson, F. Sabatié, M. Anghinolfi, Marco Ripani, K. Beard, M. Battaglieri, R. A. Schumacher, J. P. Santoro, James Mueller, Susan Taylor, A. Coleman, P. D. Rubin, Daniel S. Carman, H. R. Weller, K. Mikhailov, Y. G. Sharabian, E. Anciant, Thierry Auger, G. Gavalian, G. Audit, R. Bradford, C. E. Hyde-Wright, K. Lukashin, H. Egiyan, V. Sapunenko, K. Wang, K. A. Griffioen, L. C. Dennis, L. C. Smith, C. I O Gordon, S. J. Gaff, Dinko Pocanic, B. S. Ishkhanov, M. Taiuti, Alexei V. Klimenko, B. B. Niczyporuk, S. E. Kuhn, C. Salgado, L. Morand, T. A. Forest, M. Khandaker, C. S. Whisnant, J. D. Kellie, L. Y. Murphy, J. H. Kelley, C. Tur, Philip L. Cole, Avraham Klein, G. V. O'Rielly, Silvano Simula, M. Bektasoglu, H. Avakian, N. Pivnyuk, A. Cazes, J. Napolitano, L. M. Qin, Bernhard Mecking, S. Stepanyan, G. E. Dodge, K. V. Dharmawardane, Barry Ritchie, R. J. Feuerbach, Moshe Gai, P. V. Degtyarenko, K. Kim, Cynthia Marie Hadjidakis, Sylvain Bouchigny, M. Klusman, D. G. Jenkins, K. Sabourov, P. Rossi, P. Stoler, Friedrich Klein, R. S. Hicks, Brian Raue, Michael Dugger, H. O. Funsten, A. V. Skabelin, I. Niculescu, Michael Vineyard, S. A. Morrow, S. McAleer, F. Ronchetti, C. Djalali, D. Lawrence, G. S. Mutchler, S. O. Nelson, M. Guidal, G. Niculescu, Daijin Kim, L. Ciciani, Giovanni Ricco, S. Simionatto, K. Hicks, J. Hu, Hall Crannell, J. W. Price, W. J. Briscoe, C. Marchand, K. L. Giovanetti, B. Asavapibhop, Latifa Elouadrhiri, R. C. Minehart, C. A. Meyer, E. Pasyuk, M. Spraker, Larry Weinstein, D. Doughty, R. A. Niyazov, D. Heddle, S. A. Dytman, M. Holtrop, G. V. Fedotov, P. Corvisiero, D. P. Weygand, Patrick Girard, J. Shaw, Michael Wood, V. S. Serov, G. S. Adams, K. Joo, K. Park, U. Thoma, R. Clark, A. Empl, O. Pogorelko, K. Y. Kim, M. Guillo, F. W. Hersman, M. Nozar, E. Golovatch, L. Todor, D. Protopopescu, S. Pozdniakov, Z. L. Zhou, K. Livingston, W. K. Brooks, G. A. Peterson, S. Barrow, C. Cetina, Jens H. Kuhn, Nicola Bianchi, Victor Mokeev, V. Gyurjyan, H. Bagdasaryan, Min Suk Kim, L. Guo, M. Ungaro, Jing Zhao, J. Yun, D. Cords, A. Yegneswaran, Valeria Muccifora, Gerard Gilfoyle, R. A. Miskimen, Volker D. Burkert, A. S. Biselli, D. Branford, M. Mirazita, J. M. Laget, Laird Kramer, A.V. Stavinsky, D. J. Tedeschi, J. S. McCarthy, J. Domingo, P. Dragovitsch, S. Niccolai, and J. Hardie
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Cross section (physics), Proton, Momentum transfer, Moment (physics), Bibliography, Twist, Nucleon, Resonance (particle physics)
Abstract: We measured the inclusive electron-proton cross section in the nucleon resonance region (W From these data we extracted the structure function F2 and, by including other world data, we studied the Q2 evolution of its moments, Mn(Q2), in order to estimate higher twist contributions. The small statistical and systematic uncertainties of the CLAS data allow a precise extraction of the higher twists and will require significant improvements in theoretical predictions if a meaningful comparison with these new experimental results is to be made.
Published: 2003

290. ELECTROPRODUCTION OF STRANGENESS ON LIGHT NUCLEI

Author: R. Carlini, M. Elaasar, F. Dohrmann, I. Niculescu, H. E. Jackson, G. Savage, H. Yamaguchi, J. Roche, H. G. Juengst, S. A. Wood, S. Danagoulian, D. Abbott, Paul Gueye, T. Eden, G. Niculescu, M. Zeier, M. Sarsour, C. J. Martoff, L. Cole, Stephen Avery, R. E. Segel, J. Crowder, Y. Liang, B. Terburg, P. G. Roos, Avraham Klein, H. Mkrtchyan, Rolf Ent, Ketevi Assamagan, S. Beedoe, Cynthia Keppel, P. E. Reimer, J. W. Price, Y. Fujii, B. Zeidman, R. Mohring, O. K. Baker, D. Koltenuk, J. H. Liu, R. Asaturyan, J. H. Mitchell, H. Bitao, P. Ambrozewicz, N. Chant, A. Ahmidouch, W. Hinton, B. Zihlmann, D. G. Meekins, D. F. Geesaman, S. Mtingwa, A. Uzzle, T. Miyoshi, V. Tadevosian, K. Gustafsson, S. S. Stepanyan, David Mack, L. G. Tang, R. Sawafta, Kevin Bailey, C. S. Armstrong, Chenyu Yan, L. Yuan, D. H. Potterveld, E. Christy, C. Cothran, P. Markowitz, L. Gan, A. Yu. Semenov, W. J. Cummings, G. Collins, F. Duncan, Thomas O'Neill, Joerg Reinhold, K. Garrow, A. Lung, J. Cha, Dipangkar Dutta, R. Madey, D. S. Brown, A. Cochran, J. Arrington, J. O. Hansen, Haiyan Gao, James Dunne, H. Fenker, B. Mueller, Yoichi Sato, H. Breuer, H. T. Fortune, B. A. Raue, K. Hafidi, S. Tajima, and L. A. Ewell
Subjects: Nuclear physics, Physics, Light nucleus, Strangeness
Published: 2003

291. QUARK–HADRON DUALITY IN INCLUSIVE ELECTRON–NUCLEUS SCATTERING

Author: J. Crowder, R. Ent, I. Niculescu, J. Arrington, and Cynthia Keppel
Subjects: Quark, Physics, Baryon, Particle physics, Cover (topology), Scattering, Nuclear Theory, Hadron, Duality (optimization), Electron, Nuclear Experiment, Resonance (particle physics)
Abstract: Recent inclusive electron-nucleus scattering data have been utilized for precision tests of quark-hadron duality. The data are in the resonance and quasielastic regions and cover a range in Q{sup 2} from 0.5 to 7 (GeV/c){sup 2}. The Q{sup 2} dependence of the moments of the F{sub 2} structure function were investigated and indicate that duality holds for nuclei, even at low Q{sup 2}.
Published: 2003

292. First Measurement of Transferred Polarization in the Exclusivee→p→e′K+Λ→Reaction

Author: L. Guo, M. Ungaro, R. Fatemi, D. S. Armstrong, A. V. Vlassov, R. C. Minehart, C. A. Meyer, G. V. Fedotov, C. Bennhold, A. Coleman, H. R. Weller, V. Sapunenko, Valeria Muccifora, J. Yun, D. Cords, L. Elouadrhiri, D. P. Weygand, Baile Zhang, J. J. Manak, S. A. Morrow, A. Yegneswaran, Gerard Gilfoyle, M. Eckhause, C. Djalali, J. P. Cummings, Susan Taylor, A. K. Opper, P. Dragovitsch, H. Egiyan, H. Denizli, Laird Kramer, R. A. Miskimen, M. Kossov, P. Ambrozewicz, Rakhsha Nasseripour, R. A. Schumacher, S. Niccolai, A. V. Skabelin, Y. Kuang, D. Branford, L. Ciciani, G. S. Adams, K. S. Egiyan, M. Mirazita, J. M. Laget, S. Stepanyan, Sylvain Bouchigny, L. C. Smith, J. Hardie, S. J. Gaff, S. Simionatto, Alexei V. Klimenko, C. S. Whisnant, E. Polli, K. Joo, B. S. Ishkhanov, L. Todor, D. Protopopescu, K. Mikhailov, P. Rossi, Barry Ritchie, K. L. Giovanetti, B. Asavapibhop, S. Pozdniakov, M. Garçon, A. Cazes, M. U. Mozer, M. Guidal, C. Cetina, E. DeSanctis, W. K. Brooks, B. B. Niczyporuk, A.V. Stavinsky, Jing Zhao, M. Spraker, Larry Weinstein, Michael Vineyard, C. I O Gordon, Z. L. Zhou, G. Niculescu, K. V. Dharmawardane, D. J. Tedeschi, Dinko Pocanic, S. E. Kuhn, N. Pivnyuk, J. Napolitano, M. Holtrop, U. Thoma, E. Anciant, Ji Li, J. R. Calarco, L. Morand, K. A. Griffioen, J. H. Kelley, G. V. O'Rielly, T. A. Forest, C. Tur, O. P. Dzyubak, R. A. Niyazov, K. Livingston, M. Khandaker, J. Lachniet, D. G. Jenkins, K. Sabourov, M. D. Mestayer, K. Paschke, D. Rowntree, P. Corvisiero, V. Gyurjyan, Elton Smith, Daniel S. Carman, S. Mehrabyan, S. McAleer, D. Doughty, D. Heddle, S. Boiarinov, Terry Mart, D. I. Sober, Avraham Klein, R. J. Feuerbach, J. R. Ficenec, M. M. Ito, B. M. Preedom, G. Audit, C. E. Hyde-Wright, J. W C McNabb, G. E. Dodge, M. Anghinolfi, R. S. Hakobyan, P. Stoler, James Mueller, J. P. Santoro, J. W. Price, P. D. Rubin, H. Bagdasaryan, J. Hu, E. N. Golovach, G. A. Peterson, S. O. Nelson, P. V. Degtyarenko, K. Hicks, Y. G. Sharabian, M. Bektasoglu, K. Wang, C. Salgado, M. Battaglieri, M. Guillo, S. Barrow, I. Niculescu, D. Lawrence, R. Bradford, B. A. Mecking, Hall Crannell, C. Marchand, Kwangsoo Kim, M. Ripani, G. Riccardi, Cynthia Marie Hadjidakis, Jens H. Kuhn, C. Butuceanu, Michael Dugger, Nicola Bianchi, H. O. Funsten, W. Kim, M. Bellis, K. Park, J. S. McCarthy, K. Y. Kim, A. Longhi, R. Clark, L. Y. Murphy, A. Empl, O. Pogorelko, K. Lukashin, G. Ricco, Philip L. Cole, M. Osipenko, E. Wolin, F. Sabatié, Moshe Gai, F. W. Hersman, Friedrich Klein, K. Beard, M. Nozar, R. S. Hicks, Brian Raue, Kalvir S. Dhuga, Patrick Girard, J. Shaw, Michael Wood, Steven M. Grimes, G. Gavalian, V. Mokeev, J. P. Ball, Federico Ronchetti, Roy Thompson, Y. Prok, V. S. Serov, L. C. Dennis, B. E. Bonner, H. Avakian, W. J. Briscoe, E. Pasyuk, P. Eugenio, M. Taiuti, S. A. Dytman, J. J. Melone, D. G. Crabb, Volker D. Burkert, A. S. Biselli, G. S. Mutchler, L. M. Qin, R. DeVita, Shalev Gilad, M. Klusman, B. Carnahan, P. Heimberg, J. D. Kellie, and Thierry Auger
Subjects: Physics, Quark, Particle physics, Spectrometer, Spins, Nuclear Theory, Quark model, Hyperon, General Physics and Astronomy, Creation and annihilation operators, Particle accelerator, Polarization (waves), law.invention, Nuclear physics, law, High Energy Physics::Experiment, Nuclear Experiment
Abstract: The first measurements of the transferred polarization for the exclusive (e) over right arrow p --> e'K+(U) over right arrow reaction have been performed at Jefferson Laboratory using the CLAS spectrometer. A 2.567 GeV beam was used to measure the hyperon polarization over Q(2) from 0.3 to 1.5 (GeV/c)(2), W from 1.6 to 2.15 GeV, and over the full K+ center-of-mass angular range. Comparison with predictions of hadrodynamic models indicates strong sensitivity to the underlying resonance contributions. A nonrelativistic quark-model interpretation of our data suggests that the s (s) over bar quark pair is produced with spins predominantly antialigned. Implications for the validity of the most widely used quark-pair creation operator are discussed.
Published: 2003

293. Low-Q scaling, duality, and the EMC effect

Author: John Arrington, Juliette Mammei, Rolf Ent, C. E. Keppel, and I. Niculescu
Subjects: Quark, Nuclear and High Energy Physics, Particle physics, Proton, Nuclear Theory, EMC effect, Duality (optimization), FOS: Physical sciences, 7. Clean energy, 01 natural sciences, Resonance (particle physics), High Energy Physics - Experiment, Nuclear physics, Nuclear Theory (nucl-th), 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, 010308 nuclear & particles physics, Scattering, High Energy Physics::Phenomenology, Deep inelastic scattering, High Energy Physics - Phenomenology, High Energy Physics::Experiment, Nucleon
Abstract: High energy lepton scattering has been the primary tool for mapping out the quark distributions of nucleons and nuclei. Data on the proton and deuteron have shown that there is a fundamental connection between the low and high energy regimes, referred to as quark-hadron duality. We present the results of similar studies to more carefully examine scaling, duality, and in particular the EMC effect in nuclei. We extract nuclear modifications to the structure function in the resonance region, and for the first time demonstrate that nuclear effects in the resonance region are identical to those measured in deep inelastic scattering. With the improved precision of the data at large $x$, we for the first time observe that the large-x crossover point appears to occur at lower $x$ values in carbon than in iron or gold., Comment: 6 pages, 3 figures, 1 table, submitted to Phys. Rev. C
Published: 2003
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294. Hyperon Photoproduction in the Nucleon Resonance Region

Author: G. E. Dodge, Jing Zhao, W. Kim, M. Bellis, K. Park, S. McAleer, P. V. Degtyarenko, K. Kim, R. Miskimen, J. Yun, R. Fatemi, R. J. Feuerbach, Bernhard Mecking, K. V. Dharmawardane, Hovanes Egiyan, A. V. Vlassov, J. Lachniet, I. Niculescu, D. Rowntree, G. Riccardi, D. Lawrence, R. DeVita, J. W C McNabb, J. W. Price, A. Empl, O. Pogorelko, K. Lukashin, A. Coleman, H. R. Weller, G. Ricco, R. S. Hakobyan, F. W. Hersman, M. Bektasoglu, A. V. Skabelin, G. S. Mutchler, J. J. Manak, Hall Crannell, K. A. Griffioen, G. Gavalian, V. Sapunenko, Valeria Muccifora, S. A. Philips, P. Heimberg, Philip L. Cole, B. E. Bonner, B. M. Preedom, S. A. Morrow, Shalev Gilad, P. Stoler, H. Avakian, K. S. Egiyan, L. C. Smith, G. V. O'Rielly, Gerard Gilfoyle, S. J. Gaff, Baile Zhang, J. J. Melone, K. Mikhailov, David Jenkins, P. Eugenio, Friedrich Klein, R. A. Schumacher, R. S. Hicks, M. Battaglieri, I. I. Strakovsky, C. Marchand, M. Taiuti, K. Sabourov, W. J. Briscoe, B. P. Quinn, S. A. Dytman, C. I O Gordon, D. I. Sober, W. K. Brooks, S. Taylor, M. Osipenko, J. P. Cummings, E. De Sanctis, C. S. Whisnant, J. P. Santoro, L. Morand, K. Y. Kim, T. A. Forest, D. Branford, R. A. Niyazov, M. Ripani, K. Beard, John T. O'Brien, R. Bradford, S. Stepanyan, M. Mirazita, J. M. Laget, L.C. Dennis, Cynthia Marie Hadjidakis, H. Bagdasaryan, P. Corvisiero, Chaden Djalali, M. Kossov, M. M. Ito, H. Denizli, Kalvir S. Dhuga, A. Weisberg, Sylvain Bouchigny, K. Wang, Avraham Klein, Volker D. Burkert, Federico Ronchetti, C. Butuceanu, Michael Dugger, Y. Kuang, A. S. Biselli, H. O. Funsten, K.H. Hicks, G. S. Adams, M. Guillo, C. Salgado, Patrick Girard, J. Shaw, Rakhsha Nasseripour, K. Joo, S. Strauch, B. B. Niczyporuk, E. Polli, V. Gyurjyan, A. D. Cords, S. O. Nelson, Dinko Pocanic, Michael Wood, U. Thoma, N. Pivnyuk, J. R. Calarco, V. S. Serov, S. E. Kuhn, J. Napolitano, S. Mehrabyan, Ji Li, J. H. Kelley, C. Tur, M. D. Mestayer, Laird Kramer, Alexei V. Klimenko, Elton Smith, B. A. Raue, J. R. Ficenec, Roy Thompson, Barry Ritchie, M. Anghinolfi, E. Wolin, S. Boiarinov, James Mueller, P. D. Rubin, Y. G. Sharabian, J. P. Ball, Y. Prok, M. Eckhause, Latifa Elouadrhiri, R. C. Minehart, C. A. Meyer, C. Cetina, Michael Vineyard, D. G. Crabb, D. P. Weygand, A. Yegneswaran, P. Dragovitsch, S. Niccolai, J. Hardie, A.V. Stavinsky, J. S. McCarthy, J. Hu, B. Carnahan, F. Sabatié, Thierry Auger, B. L. Berman, L. M. Qin, M. Klusman, D. Doughty, D. Heddle, L. Ciciani, Y. Ilieva, S. Simionatto, K. L. Giovanetti, B. Asavapibhop, M. Spraker, Larry Weinstein, Nicola Bianchi, E. Anciant, L. Todor, D. Protopopescu, S. Pozdniakov, Z. L. Zhou, A. Shafi, M. Khandaker, G. A. Peterson, S. Barrow, P. Rossi, E. Pasyuk, D. J. Tedeschi, M. Guidal, G. Niculescu, M. Holtrop, Daniel S. Carman, G. Audit, C. E. Hyde-Wright, M. Nozar, L. Guo, and M. Ungaro
Subjects: Nuclear reaction, Physics, Nuclear and High Energy Physics, Particle physics, Hyperon, FOS: Physical sciences, Lambda, Lambda baryon, High Energy Physics - Experiment, Sigma baryon, Baryon, Nuclear physics, High Energy Physics - Experiment (hep-ex), Recoil, PHOTON ENERGIES, Nuclear Experiment (nucl-ex), Nuclear Experiment, Nucleon
Abstract: Cross-sections and recoil polarizations for the reactions gamma + p --> K^+ + Lambda and gamma + p --> K^+ + Sigma^0 have been measured with high statistics and with good angular coverage for center-of-mass energies between 1.6 and 2.3 GeV. In the K^+Lambda channel we confirm a structure near W=1.9 GeV at backward kaon angles, but our data shows a more complex s- and u- channel resonance structure than previously seen. This structure is present at forward and backward angles but not central angles, and its position and width change with angle, indicating that more than one resonance is playing a role. Rising back-angle cross sections at higher energies and large positive polarization at backward angles are consistent with sizable s- or u-channel contributions. None of the model calculations we present can consistently explain these aspects of the data., 5 pages, 3 figures, submitted to Physical Review Letters
Published: 2003
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295. The CEBAF large acceptance spectrometer (CLAS)

Author: B. L. Berman, L. M. Qin, D. Doughty, D. Heddle, M. Klusman, R. C. Minehart, R. J. Feuerbach, P.F. Yergin, D. Tilles, R. A. Schumacher, S. Stepanyan, Avraham Klein, W.S. Duncan, R. Magahiz, J. W. Price, D. J. Tedeschi, C. Riggs, M. Guidal, G. Asryan, Federico Ronchetti, H. Avakian, F. Barbosa, A. Yegneswaran, G. E. Dodge, A. Lake, Thierry Auger, A. K. Opper, P. V. Degtyarenko, I. Niculescu, John T. O'Brien, D. Lawrence, G. Ricco, M. Holtrop, Thomas E. Smith, D. Joyce, W.M. Taylor, Hall Crannell, M. Kossov, E. Golovatch, S. A. Dytman, P. Corvisiero, K. Beard, Philip L. Cole, W. Kim, V. Muccifora, L. Elouadrhiri, N. Bianchi, Barry Ritchie, Robert E. Welsh, J.E. O'Meara, W. Tuzel, Friedrich Klein, R. S. Hicks, A. Coleman, A. Longhi, E. Polli, V. Gyurjyan, M. Witkowski, Bernhard Mecking, Elton Smith, D. I. Sober, W. K. Brooks, J. Gram, E. DeSanctis, V. S. Serov, J. Lachniet, M. Taiuti, M. Anghinolfi, R. Miskimen, V. Frolov, J. Ficenec, James Mueller, M. Battaglieri, D. Kashy, F. Roudot, Y. G. Sharabian, R. DeVita, J. W C McNabb, K. L. Giovanetti, B. Asavapibhop, J. Distelbrink, Larry Weinstein, E. Anciant, L.C. Dennis, S. Taylor, M. M. Ito, J. Connelly, P. Bonneau, C. Martin, G.R. Wilkin, G. S. Adams, Daniel S. Carman, L. C. Smith, J. Yun, D. Cords, G. Audit, David Jenkins, C. E. Hyde-Wright, P. Hemler, S. E. Kuhn, K. Joo, Jim Napolitano, Roy Thompson, G. Riccardi, M. Ripani, A. V. Vlassov, C. Marchand, B. A. Raue, M. Nozar, B. B. Niczyporuk, H. Egiyan, E. Pasyuk, W. J. Briscoe, D. Insley, U. Thoma, Michael Dugger, D. P. Weygand, H. O. Funsten, K. Lukashin, W. R. Dodge, E. Wolin, J. J. Manak, T. Carstens, S. Ahmad, A.V. Stavinsky, G. Jacobs, C. Salgado, J. P. Ball, W. Major, D. G. Crabb, G. Doolittle, L. Y. Murphy, K. S. Egiyan, V. Koubarovski, T.Y. Tung, M. Khandaker, M. Mirazita, S. Barrow, P. Rossi, L. Todor, S. Pozdniakov, M. D. Mestayer, F. W. Hersman, S. Boiarinov, V. Sapunenko, Gerard Gilfoyle, R.C. Cuevas, S. K. Matthews, C. Cetina, Michael Vineyard, S.B. Christo, J. Robb, K.H. Hicks, Laird Kramer, Volker D. Burkert, G. S. Mutchler, M. McMullen, S. A. Philips, and P. Stoler
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), Spectrometer, Meson, Particle accelerator, Particle identification, law.invention, Nuclear physics, law, Carbon–fluorine bond, High Energy Physics::Experiment, Nuclear Experiment, Nucleon, Instrumentation, Cherenkov radiation
Abstract: The CEBAF large acceptance spectrometer (CLAS) is used to study photo- and electro-induced nuclear and hadronic reactions by providing efficient detection of neutral and charged particles over a good fraction of the full solid angle. A collaboration of about 30 institutions has designed, assembled, and commissioned CLAS in Hall B at the Thomas Jefferson National Accelerator Facility. The CLAS detector is based on a novel six-coil toroidal magnet which provides a largely azimuthal field distribution. Trajectory reconstruction using drift chambers results in a momentum resolution of 0.5% at forward angles. Cherenkov counters, time-of-flight scintillators, and electromagnetic calorimeters provide good particle identification. Fast triggering and high data-acquisition rates allow operation at a luminosity of 10 34 nucleon cm −2 s −1 . These capabilities are being used in a broad experimental program to study the structure and interactions of mesons, nucleons, and nuclei using polarized and unpolarized electron and photon beams and targets. This paper is a comprehensive and general description of the design, construction and performance of CLAS.
Published: 2003

296. First measurement of transferred polarization in the exclusive ep--e'K+Lambda--reaction

Author: D S, Carman, K, Joo, M D, Mestayer, B A, Raue, G, Adams, P, Ambrozewicz, E, Anciant, M, Anghinolfi, D S, Armstrong, B, Asavapibhop, G, Audit, T, Auger, H, Avakian, H, Bagdasaryan, J P, Ball, S P, Barrow, M, Battaglieri, K, Beard, M, Bektasoglu, M, Bellis, C, Bennhold, N, Bianchi, A S, Biselli, S, Boiarinov, B E, Bonner, S, Bouchigny, R, Bradford, D, Branford, W J, Briscoe, W K, Brooks, V D, Burkert, C, Butuceanu, J R, Calarco, B, Carnahan, A, Cazes, C, Cetina, L, Ciciani, R, Clark, P L, Cole, A, Coleman, D, Cords, P, Corvisiero, D, Crabb, H, Crannell, J P, Cummings, E, DeSanctis, P V, Degtyarenko, H, Denizli, L, Dennis, R, DeVita, K V, Dharmawardane, K S, Dhuga, C, Djalali, G E, Dodge, D, Doughty, P, Dragovitsch, M, Dugger, S, Dytman, O P, Dzyubak, M, Eckhause, H, Egiyan, K S, Egiyan, L, Elouadrhiri, A, Empl, P, Eugenio, R, Fatemi, G, Fedotov, R J, Feuerbach, J, Ficenec, T A, Forest, H, Funsten, S J, Gaff, M, Gai, M, Garçon, G, Gavalian, S, Gilad, G P, Gilfoyle, K L, Giovanetti, P, Girard, E, Golovach, C I O, Gordon, K, Griffioen, S, Grimes, M, Guidal, M, Guillo, L, Guo, V, Gyurjyan, C, Hadjidakis, R S, Hakobyan, J, Hardie, D, Heddle, P, Heimberg, F W, Hersman, K, Hicks, R S, Hicks, M, Holtrop, J, Hu, C E, Hyde-Wright, B, Ishkhanov, M M, Ito, D, Jenkins, J H, Kelley, J D, Kellie, M, Khandaker, K Y, Kim, K, Kim, W, Kim, A, Klein, F J, Klein, A V, Klimenko, M, Klusman, M, Kossov, L H, Kramer, Y, Kuang, S E, Kuhn, J, Kuhn, J, Lachniet, J M, Laget, D, Lawrence, J, Li, K, Livingston, A, Longhi, K, Lukashin, J J, Manak, C, Marchand, T, Mart, S, McAleer, J, McCarthy, J W C, McNabb, B A, Mecking, S, Mehrabyan, J J, Melone, C A, Meyer, K, Mikhailov, R, Minehart, M, Mirazita, R, Miskimen, V, Mokeev, L, Morand, S A, Morrow, M U, Mozer, V, Muccifora, J, Mueller, L Y, Murphy, G S, Mutchler, J, Napolitano, R, Nasseripour, S O, Nelson, S, Niccolai, G, Niculescu, I, Niculescu, B B, Niczyporuk, R A, Niyazov, M, Nozar, G V, O'Rielly, A K, Opper, M, Osipenko, K, Park, K, Paschke, E, Pasyuk, G, Peterson, N, Pivnyuk, D, Pocanic, O, Pogorelko, E, Polli, S, Pozdniakov, B M, Preedom, J W, Price, Y, Prok, D, Protopopescu, L M, Qin, G, Riccardi, G, Ricco, M, Ripani, B G, Ritchie, F, Ronchetti, P, Rossi, D, Rowntree, P, Rubin, F, Sabatié, K, Sabourov, C, Salgado, J, Santoro, V, Sapunenko, R A, Schumacher, V S, Serov, Y G, Sharabian, J, Shaw, S, Simionatto, A V, Skabelin, E S, Smith, L C, Smith, D I, Sober, M, Spraker, A, Stavinsky, S, Stepanyan, P, Stoler, M, Taiuti, S, Taylor, D J, Tedeschi, U, Thoma, R, Thompson, L, Todor, C, Tur, M, Ungaro, M F, Vineyard, A V, Vlassov, K, Wang, L B, Weinstein, H, Weller, D P, Weygand, C S, Whisnant, E, Wolin, M H, Wood, A, Yegneswaran, J, Yun, B, Zhang, J, Zhao, and Z, Zhou
Abstract: The first measurements of the transferred polarization for the exclusive e--p--e(')K+Lambda--reaction have been performed at Jefferson Laboratory using the CLAS spectrometer. A 2.567 GeV beam was used to measure the hyperon polarization over Q2 from 0.3 to 1.5 (GeV/c)(2), W from 1.6 to 2.15 GeV, and over the full K+ center-of-mass angular range. Comparison with predictions of hadrodynamic models indicates strong sensitivity to the underlying resonance contributions. A nonrelativistic quark-model interpretation of our data suggests that the ssmacr; quark pair is produced with spins predominantly antialigned. Implications for the validity of the most widely used quark-pair creation operator are discussed.
Published: 2002

297. Publisher’s Note:ηPhotoproduction on the Proton for Photon Energies from 0.75 to 1.95 GeV [Phys. Rev. Lett.89, 222002 (2002)]

Author: V. V. Frolov, D. Doughty, R. A. Niyazov, John T. O'Brien, D. Heddle, Barry Ritchie, S. A. Morrow, P. Rubin, M. Eckhause, C. Djalali, P. Dragovitsch, K. A. Griffioen, G. E. Dodge, M. Lucas, P. Corvisiero, D. Hancock, E. S. Smith, Sylvain Bouchigny, P. Rossi, P. V. Degtyarenko, S. Niccolai, Carlos A. Salgado, L. Elouadrhiri, G. Ricco, J. Hardie, K. S. Egiyan, Baile Zhang, R. C. Minehart, C. A. Meyer, G. S. Mutchler, V. Koubarovski, K. Mikhailov, G. Gavalian, A. K. Opper, I. Niculescu, M. M. Ito, I. I. Strakovsky, A.V. Stavinsky, D. Lawrence, M. Spraker, C. Cetina, H. Egiyan, G. V. O'Rielly, E. Wolin, Michael Vineyard, J. P. Cummings, D. P. Weygand, L. Farhi, Y. Kuang, D. J. Tedeschi, C. S. Whisnant, D. G. Jenkins, K. Sabourov, G. P. Capitani, E. Polli, William Brooks, G. S. Adams, R. DeVita, J. W C McNabb, Ji Li, H. Denizli, Hall Crannell, M. U. Mozer, P. Heimberg, M. Witkowski, K. V. Dharmawardane, A. Coleman, P. L. Cole, Cynthia Marie Hadjidakis, Andreas Klein, J. R. Ficenec, S. McAleer, J. D. Kellie, P. Stoler, J. Lachniet, H. R. Weller, M. Kossov, J. R. Calarco, C. Marchand, M. D. Mestayer, J. J. Manak, D. Rowntree, M. Anghinolfi, James Mueller, Michael Dugger, J. Connelly, A. V. Skabelin, K. S. Dhuga, D. Pogorelko, H. O. Funsten, S. O. Nelson, Y. G. Sharabian, Frank Klein, L. C. Smith, Rakhsha Nasseripour, S. J. Gaff, K. Hicks, M. Sanzone-Arenhovel, R. A. Schumacher, S. Boiarinov, B. B. Niczyporuk, B. M. Preedom, S. Strauch, S. A. Philips, W. Kim, N. Pivnyuk, C. I O Gordon, K. Lukashin, J. Napolitano, Moshe Gai, Dinko Pocanic, M. Battaglieri, Shalev Gilad, M. Nozar, S. E. Kuhn, L. Morand, T. A. Forest, B. Carnahan, F. Sabatié, K. L. Giovanetti, B. Asavapibhop, J. H. Kelley, Stephen Taylor, J. P. Ball, Y. Prok, Patrick Girard, R. Bradford, B. A. Mecking, Larry Weinstein, Gerald Feldman, J. Shaw, S. Stepanyan, D. S. Carman, Jens H. Kuhn, A. Longhi, E. Anciant, K. Wang, U. Thoma, Nicola Bianchi, Thierry Auger, Michael Wood, R. S. Hicks, Brian Raue, K. Livingston, V. S. Serov, L. C. Dennis, M. Khandaker, G. Audit, M. Ripani, M. Guillo, C. E. Hyde-Wright, B. L. Berman, L. M. Qin, H. Avakian, R. J. Feuerbach, K. Beard, M. Klusman, D. G. Crabb, G. A. Peterson, W. Major, M. Bektasoglu, S. Barrow, M. Guidal, G. Niculescu, W. J. Briscoe, E. Pasyuk, Federico Ronchetti, M. Holtrop, Thomas E. Smith, S. A. Dytman, L. Todor, J. S. McCarthy, M. Bellis, D. Protopopescu, L. Y. Murphy, S. Pozdniakov, S. Mehrabyan, Z. L. Zhou, R. Clark, A. Shafi, G. Riccardi, J. P. Santoro, Roy Thompson, Jing Zhao, M. Taiuti, V. Sapunenko, Valeria Muccifora, Gerard Gilfoyle, F. W. Hersman, R. A. Miskimen, D. Branford, M. Mirazita, J. M. Laget, Laird Kramer, R. Fatemi, A. V. Vlassov, K. Park, D. I. Sober, Volker D. Burkert, A. S. Biselli, L. Guo, M. Ungaro, K. Joo, J. Yun, D. Cords, A. Yegneswaran, E. DeSanctis, V. Gyurjyan, H. Bagdasaryan, and J. W. Price
Subjects: Physics, Nuclear physics, Photon, Proton, General Physics and Astronomy
Published: 2002

298. On L/sub 2/ memoryless control of time-delay systems

Author: S.-I. Niculescu, V. Ionescu, and H.J. Woerdeman
Subjects: Algebraic properties, Exponential stability, Differential equation, Control theory, Attenuation, Feedback control, Norm (mathematics), Linear system, Matrix pencil, Mathematics
Abstract: This paper focuses on the design of L/sub 2/ memoryless controllers for a class of uncertain linear systems described by differential equations with delayed state and disturbances. We give sufficient conditions for the design of a memoryless state feedback control law which guarantees the delay-independent closed-loop stability with an L/sub 2/ norm bound constraint on disturbance attenuation. These conditions are derived in terms of algebraic properties of an adequate matrix pencil via a Lyapunov-Krasovskii functional based approach. The criteria proposed here are less conservative than earlier ones proposed in the literature.
Published: 2002

299. Nuclear transparency from quasielasticA(e,e′p)reactions up toQ2=8.1(GeV/c)2

Author: K. Garrow, D. McKee, A. Ahmidouch, C. S. Armstrong, J. Arrington, R. Asaturyan, S. Avery, O. K. Baker, D. H. Beck, H. P. Blok, C. W. Bochna, W. Boeglin, P. Bosted, M. Bouwhuis, H. Breuer, D. S. Brown, A. Bruell, R. D. Carlini, N. S. Chant, A. Cochran, L. Cole, S. Danagoulian, D. B. Day, J. Dunne, D. Dutta, R. Ent, H. C. Fenker, B. Fox, L. Gan, D. Gaskell, A. Gasparian, H. Gao, D. F. Geesaman, R. Gilman, P. L. J. Guèye, M. Harvey, R. J. Holt, X. Jiang, C. E. Keppel, E. Kinney, Y. Liang, W. Lorenzon, A. Lung, D. J. Mack, P. Markowitz, J. W. Martin, K. McIlhany, D. Meekins, M. A. Miller, R. G. Milner, J. H. Mitchell, H. Mkrtchyan, B. A. Mueller, A. Nathan, G. Niculescu, I. Niculescu, T. G. O’Neill, V. Papavassiliou, S. Pate, R. B. Piercey, D. Potterveld, R. D. Ransome, J. Reinhold, E. Rollinde, P. Roos, A. J. Sarty, R. Sawafta, E. C. Schulte, E. Segbefia, C. Smith, S. Stepanyan, S. Strauch, V. Tadevosyan, L. Tang, R. Tieulent, A. Uzzle, W. F. Vulcan, S. A. Wood, F. Xiong, L. Yuan, M. Zeier, B. Zihlmann, and V. Ziskin
Subjects: Nuclear physics, Mass number, Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Range (particle radiation), Deuterium, Nuclear transparency, Momentum transfer, Color transparency, Energy (signal processing)
Abstract: The quasielastic (e,e'p) reaction was studied on targets of deuterium, carbon, and iron up to a value of momentum transfer Q{sup 2} of 8.1 (GeV/c){sup 2}. A nuclear transparency was determined by comparing the data to calculations in the Plane-Wave Impulse Approximation. The dependence of the nuclear transparency on Q{sup 2} and the mass number A was investigated in a search for the onset of the Color Transparency within our range of Q{sup 2}. A fit to the world's nuclear transparency data reflects the energy dependence of the free proton-nucleon cross section.
Published: 2002

300. Measurement of ep--e' ppi+ pi- and baryon resonance analysis

Author: M, Ripani, V D, Burkert, V, Mokeev, M, Battaglieri, R, De Vita, E, Golovach, M, Taiuti, G, Adams, E, Anciant, M, Anghinolfi, B, Asavapibhop, G, Audit, T, Auger, H, Avakian, H, Bagdasaryan, J P, Ball, S, Barrow, K, Beard, M, Bektasoglu, M, Bellis, B L, Berman, N, Bianchi, A S, Biselli, S, Boiarinov, B E, Bonner, S, Bouchigny, R, Bradford, D, Branford, W J, Briscoe, W K, Brooks, J R, Calarco, D S, Carman, B, Carnahan, A, Cazes, C, Cetina, L, Ciciani, P L, Cole, A, Coleman, D, Cords, P, Corvisiero, D, Crabb, H, Crannell, J P, Cummings, E, De Sanctis, P V, Degtyarenko, H, Denizli, L, Dennis, K V, Dharmawardane, C, Djalali, G E, Dodge, D, Doughty, P, Dragovitsch, M, Dugger, S, Dytman, M, Eckhause, H, Egiyan, K S, Egiyan, L, Elouadrhiri, A, Empl, R, Fatemi, G, Fedotov, G, Feldman, R J, Feuerbach, J, Ficenec, T A, Forest, H, Funsten, S J, Gaff, M, Gai, M, Garçon, G, Gavalian, S, Gilad, G P, Gilfoyle, K L, Giovanetti, P, Girard, K, Griffioen, M, Guidal, M, Guillo, L, Guo, V, Gyurjyan, C, Hadjidakis, J, Hardie, D, Heddle, P, Heimberg, F W, Hersman, K, Hicks, R S, Hicks, M, Holtrop, J, Hu, C E, Hyde-Wright, B, Ishkhanov, M M, Ito, D, Jenkins, K, Joo, J H, Kelley, J D, Kellie, M, Khandaker, K Y, Kim, K, Kim, W, Kim, A, Klein, F J, Klein, A V, Klimenko, M, Klusman, M, Kossov, L H, Kramer, Y, Kuang, S E, Kuhn, J, Kuhn, J, Lachniet, J M, Laget, D, Lawrence, Ji, Li, K, Livingston, A, Longhi, K, Lukashin, J J, Manak, C, Marchand, S, McAleer, J, McCarthy, J W C, McNabb, B A, Mecking, M D, Mestayer, C A, Meyer, K, Mikhailov, R, Minehart, M, Mirazita, R, Miskimen, L, Morand, S A, Morrow, M U, Mozer, V, Muccifora, J, Mueller, L Y, Murphy, G S, Mutchler, J, Napolitano, R, Nasseripour, S O, Nelson, S, Niccolai, G, Niculescu, I, Niculescu, B B, Niczyporuk, R A, Niyazov, M, Nozar, G V, O'Rielly, A K, Opper, M, Osipenko, K, Park, E, Pasyuk, G, Peterson, S A, Philips, N, Pivnyuk, D, Pocanic, O, Pogorelko, E, Polli, S, Pozdniakov, B M, Preedom, J W, Price, Y, Prok, D, Protopopescu, L M, Qin, B, Quinn, B A, Raue, G, Riccardi, G, Ricco, B G, Ritchie, F, Ronchetti, P, Rossi, D, Rowntree, P D, Rubin, F, Sabatié, K, Sabourov, C, Salgado, J P, Santoro, V, Sapunenko, R A, Schumacher, V S, Serov, A, Shafi, Y G, Sharabian, J, Shaw, S, Simionatto, A V, Skabelin, E S, Smith, L C, Smith, D I, Sober, M, Spraker, A, Stavinsky, S, Stepanyan, P, Stoler, I I, Strakovsky, S, Taylor, D J, Tedeschi, U, Thoma, R, Thompson, L, Todor, M, Ungaro, M F, Vineyard, A V, Vlassov, K, Wang, L B, Weinstein, H, Weller, D P, Weygand, C S, Whisnant, E, Wolin, M H, Wood, A, Yegneswaran, J, Yun, B, Zhang, J, Zhao, and Z, Zhou
Abstract: The cross section for the reaction ep--e(')ppi(+)pi(-) was measured in the resonance region for 1.4W2.1 GeV and 0.5Q21.5 GeV(2)/c(2) using the CLAS detector at Jefferson Laboratory. The data show resonant structures not visible in previous experiments. The comparison of our data to a phenomenological prediction using available information on N(*) and Delta states shows an evident discrepancy. A better description of the data is obtained either by a sizable change of the properties of the P13(1720) resonance or by introducing a new baryon state, not reported in published analyses.
Published: 2002

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