Author: "S. A. Philips" / Publisher: american physical society (aps) - Searchworks@Jio Institute Digital Library Search Results

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1. Theep→e′pηReaction at and above theS11(1535)Baryon Resonance

Author: M. J. Amaryan, M. Taiuti, S. K. Matthews, J. Ficenec, Gyurjyan, W. Kim, A. Longhi, R. A. Schumacher, B. E. Bonner, L. Elouadrhiri, A. P. Freyberger, R. Magahiz, Robert E. Welsh, S. Dytman, S. Whisnant, B. M. Preedom, Federico Ronchetti, R. J. Feuerbach, K. L. Giovanetti, B. Asavapibhop, Michael Dugger, Shalev Gilad, De Sanctis E, A. V. Vlassov, G. Ricco, J. R. Kane, H. Avakian, Philip L. Cole, J. P. Cummings, G. S. Adams, Larry Weinstein, R. A. Miskimen, K. Joo, J. Shaw, R. W. Major, Moshe Gai, M. Kossov, W. J. Briscoe, D. Rowntree, D. Doughty, K. Beard, W. K. Brooks, Friedrich Klein, R. S. Hicks, Brian Raue, Kevin Fissum, Kalvir S. Dhuga, Barry Ritchie, A. Coleman, K. A. Griffioen, M. M. Ito, G. Riccardi, L. M. Qin, J. J. Manak, M. Mirazita, J. M. Laget, C. E. Hyde-Wright, J. W C McNabb, M. S. Ohandjanyan, D. Heddle, C. Salgado, H. R. Weller, Roy Thompson, Curtis Smith, D. P. Weygand, Herbert O. Funsten, S. A. Philips, Patrick Girard, Y. Kuang, H. Egiyan, M. Witkowski, Bernhard Mecking, Mestayer, A. J. Sarty, Jing Zhao, S. Stepanyan, De Vita R, D. G. Jenkins, C. Djalali, Z. L. Zhou, M. Lucas, Airton Deppman, D. I. Sober, A. Shafi, D. Hancock, Avraham Klein, Leskin Ga, M. Battaglieri, S. McAleer, William Bertozzi, E. Polli, E. Anciant, L. Farhi, G. E. Dodge, Daniel S. Carman, V. B. Gavrilov, O. Pogorelko, A. K. Opper, G. Audit, J. W. Price, M. Khandaker, E. Wolin, P. V. Degtyarenko, Y. Patois, Gerard Gilfoyle, Dinko Pocanic, L.C. Dennis, K. Loukachine, N. Pivnyuk, M. Bektasoglu, S. E. Kuhn, S. M. Shuvalov, D. Lawrence, M. Eckhause, J. Napolitano, M. Ripani, M. Guillo, Jochen Heisenberg, Y. V. Efremenko, Volker D. Burkert, M. Sanzone, J. Connelly, Donal Day, M. Sargsyan, G. A. Peterson, M. Guidal, A. V. Skabelin, J. Yun, D. Cords, A. Yegneswaran, A. S. Biselli, Elton Smith, S. Barrow, M. Holtrop, Thomas E. Smith, G. S. Mutchler, M. Anghinolfi, Hall Crannell, D. G. Crabb, James Mueller, S. Taylor, P. D. Rubin, G. Capitani, F. Roudot, D. J. Tedeschi, Y. G. Sharabian, M. Spraker, Sapunenko, R. C. Minehart, M. Klusman, Nicola Bianchi, S. Boiarinov, C. A. Meyer, J. S. McCarthy, B. Carnahan, Thierry Auger, A. R. Reolon, Michael Vineyard, C. Marchand, P. Rossi, P. Dragovitsch, F. W. Hersman, R. A. Demirchyan, T. Y. Tung, J. Hardie, K. Y. Kim, Muccifora, R. A. Niyazov, John T. O'Brien, P. Corvisiero, K. S. Egiyan, Calarco, P. Stoler, and K. Hicks
Subjects: Baryon, Physics, Nuclear physics, Particle physics, Photon, Amplitude, Angular distribution, Meson, Momentum transfer, General Physics and Astronomy, Resonance, Invariant (physics), Nuclear Experiment
Abstract: New cross sections for the reaction e p-->e p eta are reported for total center of mass energy W = 1.5--1.86 GeV and invariant momentum transfer Q2 = 0.25--1.5 (GeV/c)(2). This large kinematic range allows extraction of important new information about response functions, photocouplings, and eta N coupling strengths of baryon resonances. Newly observed structure at W approximately 1.65 GeV is shown to come from interference between S and P waves and can be interpreted with known resonances. Improved values are derived for the photon coupling amplitude for the S11(1535) resonance.
Published: 2001

2. Precise Measurement of the Neutron Magnetic Form FactorGMnin the Few-GeV2Region

Author: R. J. Feuerbach, J. P. Cummings, L. C. Smith, E. Munevar, R. De Masi, D. Keller, M. Kossov, B. S. Ishkhanov, I. Popa, K. S. Egiyan, G. Ricco, K. Mikhailov, L. Cheng, M. Khandaker, M. Garçon, J. Shaw, Michael Wood, P. Nadel-Turonski, Nikolay Shvedunov, M. R. Niroula, K. Hafidi, R. Nasseripour, S. McAleer, Friedrich Klein, B. P. Quinn, Brian Raue, V. S. Serov, L. Casey, F. X. Girod, Susan Taylor, Marco A. Huertas, M. Lowry, V. Sapunenko, D. P. Watts, L. C. Dennis, B. E. Bonner, Hartmuth Arenhövel, Dinko Pocanic, H. Egiyan, R. G. Fersch, H. Avakian, D. Doughty, B. B. Niczyporuk, G. S. Adams, S. Park, D. Sharov, N. Kalantarians, P. L. Cole, Sylvain Bouchigny, Sabine Jeschonnek, R. C. Minehart, Kei Moriya, D. Heddle, P. Rossi, J. Lachniet, H. G. Juengst, C. A. Meyer, N. Pivnyuk, K. Joo, W. J. Briscoe, B. L. Berman, A. Tkabladze, G. V. Fedotov, E. Pasyuk, D. Rowntree, A. Coleman, L. M. Qin, M. Y. Gabrielyan, S. E. Kuhn, S. A. Dytman, V. Crede, Y. Ilieva, J. R. Calarco, T. Mineeva, J. W. Price, M. J. Amaryan, C. Paterson, S. Strauch, M. MacCormick, A.V. Stavinsky, M. Klusman, I. Hleiqawi, V. P. Kubarovsky, K. P. Adhikari, S. L. Careccia, A. Empl, L. El Fassi, O. Pogorelko, B. Moreno, D. P. Weygand, J. Salamanca, R. Suleiman, M. E. McCracken, Elton Smith, K. L. Giovanetti, B. Asavapibhop, G. V. O'Rielly, Tsutomu Mibe, Larry Weinstein, Z. W. Zhao, J. W C McNabb, D. J. Tedeschi, D. Protopopescu, D. G. Jenkins, Barry Ritchie, M. Anghinolfi, James Mueller, S. Malace, S. A. Morrow, P. Rubin, I. Bedlinskiy, G. S. Mutchler, Konstantin Stopani, S. Pozdniakov, V. Gyurjyan, M. M. Ito, C. Djalali, Y. G. Sharabian, G. Rosner, T. Kageya, K. Livingston, D. S. Dale, X. Wei, R. Dickson, V. Kuznetsov, C. E. Hyde-Wright, H. Denizli, N. Guler, N. A. Baltzell, P. Mattione, K. A. Griffioen, M. S. Saini, A. V. Skabelin, P. Dragovitsch, J. Zhang, S. Barrow, E. De Sanctis, S. Niccolai, J. T. Goetz, E. Polli, H. Bagdasaryan, R. A. Miskimen, J. D. Kellie, B. McKinnon, Sergey Kuleshov, M. Bektasoglu, J. Hardie, M. Nozar, W. Kim, Laird Kramer, G. Niculescu, D. I. Sober, D. Branford, M. Guidal, R. A. Schumacher, H. Hakobyan, M. Mirazita, P. Khetarpal, C. Hanretty, J. M. Laget, M. Holtrop, Victor Mokeev, L. Graham, J. R. Johnstone, N. Gevorgyan, L. Guo, M. Ungaro, M. Osipenko, F. Sabatié, A. Daniel, K. Beard, Kalvir S. Dhuga, S. Bültmann, A. I. Ostrovidov, J. Yun, D. Cords, V. Batourine, T. A. Forest, A. Yegneswaran, A. C S Lima, A. Sandorfi, K. Park, R. Fatemi, S. Stepanyan, A. V. Vlassov, D. G. Ireland, Volker D. Burkert, A. S. Biselli, J. Pierce, Avraham Klein, B. Zhao, J. Langheinrich, R. De Vita, A. Fradi, S. S. Stepanyan, S. A. Philips, William Brooks, N. Markov, P. Konczykowski, B. E. Stokes, J. J. Manak, S. Anefalos Pereira, G. E. Dodge, H. Y. Lu, N. Dashyan, Maryam Moteabbed, P. V. Degtyarenko, K. V. Dharmawardane, I. Niculescu, D. Lawrence, D. Schott, F. W. Hersman, M. Battaglieri, N. Baillie, P. Stoler, K. Hicks, G. Asryan, O. P. Dzyubak, R. A. Niyazov, P. Corvisiero, R. Bradford, B. A. Mecking, K. Lukashin, E. Wolin, Gerard Gilfoyle, M. Guillo, D. Sokhan, W. Gohn, N. Hassall, M. Bellis, E. Golovatch, J. P. Ball, J. Hu, Y. Prok, D. S. Carman, S. Dhamija, M. D. Mestayer, L. Elouadrhiri, I. I. Strakovsky, E. L. Isupov, R. W. Gothe, G. Gavalian, S. Tkachenko, A. Deur, Michael L. Williams, J. Kuhn, N. Benmouna, J. P. Santoro, Andrei Afanasev, M. Ripani, D. G. Crabb, K. Y. Kim, Roy Thompson, Cynthia Marie Hadjidakis, S. Boiarinov, Michael Dugger, B. M. Preedom, Douglas Higinbotham, M. Yurov, Lorenzo Zana, H. S. Jo, C. Bookwalter, C. Salgado, Kwangsoo Kim, G. Riccardi, P. Eugenio, A. Starostin, M. Taiuti, Michael Vineyard, and P. Collins
Subjects: Physics, 010308 nuclear & particles physics, Scattering, Nuclear Theory, General Physics and Astronomy, Scintillator, 7. Clean energy, 01 natural sciences, Nuclear physics, Dipole, Deuterium, 0103 physical sciences, Magnetic form factor, Neutron detection, High Energy Physics::Experiment, Neutron, Nuclear Experiment, 010306 general physics, Electron scattering
Abstract: The neutron elastic magnetic form factor was extracted from quasielastic electron scattering on deuterium over the range Q;{2}=1.0-4.8 GeV2 with the CLAS detector at Jefferson Lab. High precision was achieved with a ratio technique and a simultaneous in situ calibration of the neutron detection efficiency. Neutrons were detected with electromagnetic calorimeters and time-of-flight scintillators at two beam energies. The dipole parametrization gives a good description of the data.
Published: 2009

3. Search for the Photoexcitation of Exotic Mesons in theπ+π+π−System

Author: M. Nozar, C. Salgado, D. P. Weygand, L. Guo, G. Adams, Ji Li, P. Eugenio, M. J. Amaryan, M. Anghinolfi, G. Asryan, H. Avakian, H. Bagdasaryan, N. Baillie, J. P. Ball, N. A. Baltzell, S. Barrow, M. Battaglieri, I. Bedlinskiy, M. Bektasoglu, M. Bellis, N. Benmouna, B. L. Berman, A. S. Biselli, L. Blaszczyk, B. E. Bonner, 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, B. Carnahan, L. Casey, A. Cazes, S. Chen, L. Cheng, P. L. Cole, P. Collins, P. Coltharp, D. Cords, P. Corvisiero, D. Crabb, H. Crannell, V. Crede, J. P. Cummings, D. Dale, N. Dashyan, R. De Masi, R. De Vita, E. De Sanctis, P. V. Degtyarenko, H. Denizli, L. Dennis, A. Deur, K. V. Dharmawardane, K. S. Dhuga, R. Dickson, C. Djalali, G. E. Dodge, D. Doughty, M. Dugger, S. Dytman, O. P. Dzyubak, H. Egiyan, K. S. Egiyan, L. El Fassi, L. Elouadrhiri, R. Fatemi, G. Fedotov, R. J. Feuerbach, T. A. Forest, A. Fradi, H. Funsten, M. Garçon, G. Gavalian, N. Gevorgyan, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, J. T. Goetz, R. W. Gothe, K. A. Griffioen, M. Guidal, M. Guillo, N. Guler, V. Gyurjyan, C. Hadjidakis, K. Hafidi, H. Hakobyan, C. Hanretty, J. Hardie, N. Hassall, D. Heddle, F. W. Hersman, K. Hicks, I. Hleiqawi, M. Holtrop, C. E. Hyde-Wright, Y. Ilieva, D. G. Ireland, B. S. Ishkhanov, E. L. Isupov, M. M. Ito, D. Jenkins, H. S. Jo, J. R. Johnstone, K. Joo, H. G. Juengst, N. Kalantarians, J. D. Kellie, M. Khandaker, W. Kim, A. Klein, F. J. Klein, M. Kossov, Z. Krahn, L. H. Kramer, V. Kubarovsky, J. Kuhn, S. E. Kuhn, S. V. Kuleshov, V. Kuznetsov, J. Lachniet, J. M. Laget, J. Langheinrich, D. Lawrence, K. Livingston, H. Y. Lu, M. MacCormick, N. Markov, P. Mattione, S. McAleer, B. McKinnon, J. W. C. McNabb, B. A. Mecking, S. Mehrabyan, M. D. Mestayer, C. A. Meyer, T. Mibe, K. Mikhailov, M. Mirazita, R. Miskimen, V. Mokeev, B. Moreno, K. Moriya, S. A. Morrow, M. Moteabbed, J. Mueller, E. Munevar, G. S. Mutchler, P. Nadel-Turonski, R. Nasseripour, S. Niccolai, G. Niculescu, I. Niculescu, B. B. Niczyporuk, M. R. Niroula, R. A. Niyazov, G. V. O’Rielly, M. Osipenko, A. I. Ostrovidov, K. Park, E. Pasyuk, C. Paterson, S. Anefalos Pereira, S. A. Philips, J. Pierce, N. Pivnyuk, D. Pocanic, O. Pogorelko, E. Polli, I. Popa, 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, J. Salamanca, J. P. Santoro, V. Sapunenko, R. A. Schumacher, V. S. Serov, Y. G. Sharabian, D. Sharov, N. V. Shvedunov, A. V. Skabelin, E. S. Smith, L. C. Smith, D. I. Sober, D. Sokhan, A. Stavinsky, S. S. Stepanyan, S. Stepanyan, B. E. Stokes, P. Stoler, I. I. Strakovsky, S. Strauch, M. Taiuti, D. J. Tedeschi, U. Thoma, A. Tkabladze, S. Tkachenko, L. Todor, M. Ungaro, M. F. Vineyard, A. V. Vlassov, D. P. Watts, L. B. Weinstein, M. Williams, E. Wolin, M. H. Wood, A. Yegneswaran, L. Zana, J. Zhang, B. Zhao, and Z. W. Zhao
Subjects: Quantum chromodynamics, Physics, Particle physics, Meson, 010308 nuclear & particles physics, Partial wave analysis, Bremsstrahlung, General Physics and Astronomy, 01 natural sciences, 7. Clean energy, Nuclear physics, Excited state, 0103 physical sciences, Isobar, Production (computer science), 010306 general physics, Spin-½
Abstract: A search for exotic mesons in the $$\pi^{+}\pi^{+}\pi^{-}$$ system photoproduced by the charge exchange reaction $$\gamma p\to \pi^{+}\pi^{+}\pi^{-}(n)$$ was carried out by the CLAS collaboration at Jefferson Lab. A tagged-photon beam with energies in the 4.8 to 5.4 GeV range, produced through bremsstrahlung from a 5.744 GeV electron beam, was incident on a liquid-hydrogen target. A Partial Wave Analysis (PWA) was performed on a sample of 83,000 events, the highest such statistics to date in this reaction at these energies. The main objective of this study was to look for the photoproduction of an exotic $$J^{PC} = 1^{-+}$$ resonant state in the 1 to 2 GeV mass range. Our PWA analysis, based on the isobar model, shows production of the $$a_{2}(1320)$$ and the $$\pi_{2}(1670)$$ mesons, but no evidence for the $$a_{1}(1260)$$, nor the $$\pi_{1}(1600)$$ exotic state at the expected levels. An upper limit of 13.5 nb is determined for the exotic $$\pi_1(1600)$$ cross section, less than 2% of the $a_2(1320)
Published: 2009

4. Electroexcitation of the Roper resonance for1.7<Q2<4.5GeV2ine→p→enπ+

Author: B. Zhao, F. W. Hersman, Marco Ripani, S. Dhamija, R. W. Gothe, K. Y. Kim, J. Kuhn, J. P. Santoro, E. De Sanctis, Latifa Elouadrhiri, B. M. Preedom, P. Eugenio, R. C. Minehart, Kei Moriya, D. I. Sober, M. Taiuti, G. Rosner, C. A. Meyer, M. Battaglieri, G. V. Fedotov, P. Collins, J. J. Melone, Lorenzo Zana, R. Bradford, K. Lukashin, J. Shaw, V. Batourine, D. P. Weygand, H. Hakobyan, Friedrich Klein, H. S. Jo, Michael Wood, K. Hafidi, Brian Raue, Gerald Feldman, Elton Smith, R. Fatemi, V. S. Serov, A. V. Vlassov, T. Lee, M. Anghinolfi, P. Coltharp, James Mueller, I. I. Strakovsky, N. A. Baltzell, R. De Vita, P. D. Rubin, A. Cazes, Maryam Moteabbed, C. Salgado, Bernhard Mecking, Y. G. Sharabian, A. Deur, K. A. Griffioen, K. S. Egiyan, K. V. Dharmawardane, Baile Zhang, Alexei V. Klimenko, S. Anefalos Pereira, Z. Krahn, W. K. Brooks, Shifeng Chen, J. D. Kellie, Y. Prok, N. Hassall, M. Bellis, J. Langheinrich, Barry Ritchie, N. Baillie, P. Mattione, M. S. Saini, L. C. Dennis, B. E. Bonner, S. S. Stepanyan, S. A. Philips, R. A. Miskimen, B. McKinnon, H. Avakian, J. T. Goetz, E. Polli, B. L. Berman, D. Sharov, M. Mirazita, D. Branford, K. Livingston, D. S. Dale, Ji Li, L. M. Qin, J. M. Laget, H. Denizli, N. Gevorgyan, C. Paterson, G. Gavalian, W. J. Briscoe, E. Pasyuk, S. Tkachenko, M. D. Mestayer, S. A. Dytman, J. Donnelly, G. Asryan, A. V. Skabelin, N. Benmouna, Gerard Gilfoyle, O. P. Dzyubak, R. A. Niyazov, E. L. Isupov, A. Fradi, D. Sokhan, M. Guillo, V. Crede, Michael L. Williams, W. Gohn, N. Markov, V. Sapunenko, Dinko Pocanic, J. R. Calarco, P. Corvisiero, E. Golovatch, S. Boiarinov, S. E. Kuhn, Charles Hyde, V. P. Kubarovsky, O. Pogorelko, C. Tur, M. J. Amaryan, M. MacCormick, I. Hleiqawi, R. Nasseripour, S. L. Careccia, S. McAleer, F. X. Girod, Laird Kramer, B. E. Stokes, G. S. Adams, J. P. Cummings, Cynthia Marie Hadjidakis, G. E. Dodge, H. Y. Lu, K. L. Giovanetti, L. Blaszczyk, P. V. Degtyarenko, M. Kossov, V. Gyurjyan, K. Joo, I. Popa, Sergey Kuleshov, M. Bektasoglu, Michael Dugger, D. Heddle, M. Nozar, P. Stoler, I. Niculescu, D. Lawrence, J. Zhang, R. De Masi, D. Schott, S. A. Morrow, C. Djalali, R. A. Schumacher, M. Guidal, Larry Weinstein, K. Hicks, M. Holtrop, L. Graham, H. Bagdasaryan, C. I O Gordon, P. Ambrozewicz, S. Bültmann, L. Morand, T. A. Forest, S. Stepanyan, J. Pierce, Avraham Klein, K. Mikhailov, L. Cheng, Nikolay Shvedunov, A. I. Ostrovidov, L. Casey, A. C S Lima, K. Park, N. Kalantarians, B. B. Niczyporuk, D. G. Ireland, Michael Vineyard, N. Pivnyuk, Giovanni Ricco, Atilla Gonenc, E. Wolin, Volker D. Burkert, A. S. Biselli, J. P. Ball, D. S. Carman, D. G. Crabb, J. Salamanca, J. W C McNabb, M. Yurov, J. W. Price, S. Mehrabyan, C. Bookwalter, G. Riccardi, H. Funsten, P. Nadel-Turonski, C. Butuceanu, Tsutomu Mibe, N. Dashyan, K. Hafnaoui, C. Hanretty, G. V. O'Rielly, J. R. Johnstone, Z. W. Zhao, D. Keller, Paolo Rossi, D. G. Jenkins, J. Lachniet, A. Tkabladze, S. Park, Sylvain Bouchigny, D. Rowntree, M. M. Ito, R. S. Hakobyan, L. El Fassi, M. Khandaker, H. G. Juengst, A.V. Stavinsky, D. J. Tedeschi, V. Mokeev, I. Bedlinskiy, L. C. Smith, E. Munevar, B. S. Ishkhanov, M. R. Niroula, V. Kuznetsov, S. Strauch, R. Suleiman, L. Guo, G. S. Mutchler, M. Ungaro, S. Niccolai, J. Hardie, D. Doughty, W. Kim, D. P. Watts, G. Niculescu, J. Yun, D. Cords, H. Egiyan, T. Takeuchi, A. Yegneswaran, M. Osipenko, F. Sabatié, Kalvir S. Dhuga, M. Y. Gabrielyan, R. Dickson, R. J. Feuerbach, N. Guler, Inna Aznauryan, P. L. Cole, S. Barrow, L. Todor, D. Protopopescu, S. Pozdniakov, M. Garçon, Y. Ilieva, and B. Moreno
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Roper resonance, Meson production, 010308 nuclear & particles physics, State (functional analysis), 01 natural sciences, Helicity, Baryon, 0103 physical sciences, Pi, Isobar, 010306 general physics, Ground state
Abstract: The helicity amplitudes of the electroexcitation of the Roper resonance are extracted for $1.7l{Q}^{2}l4.5\phantom{\rule{0.3em}{0ex}}{\mathrm{GeV}}^{2}$ from recent high precision JLab-CLAS cross section and longitudinally polarized beam asymmetry data for ${\ensuremath{\pi}}^{+}$ electroproduction on protons at $W=1.15\ensuremath{-}1.69$ GeV. The analysis is made using two approaches, dispersion relations and a unitary isobar model, which give consistent ${Q}^{2}$ behavior of the helicity amplitudes for the ${\ensuremath{\gamma}}^{*}p\ensuremath{\rightarrow}$N(1440)P${}_{11}$ transition. It is found that the transverse helicity amplitude ${A}_{1/2}$, which is large and negative at ${Q}^{2}=0$, becomes large and positive at ${Q}^{2}\ensuremath{\simeq}2\phantom{\rule{0.3em}{0ex}}{\mathrm{GeV}}^{2}$, and then drops slowly with ${Q}^{2}$. The longitudinal helicity amplitude ${S}_{1/2}$, which was previously found from CLAS $\stackrel{\ensuremath{\rightarrow}}{e}p\ensuremath{\rightarrow}\mathit{ep}{\ensuremath{\pi}}^{0},\mathit{en}{\ensuremath{\pi}}^{+}$ data to be large and positive at ${Q}^{2}=0.4,0.65\phantom{\rule{0.3em}{0ex}}{\mathrm{GeV}}^{2}$, drops with ${Q}^{2}$. Available model predictions for ${\ensuremath{\gamma}}^{*}p\ensuremath{\rightarrow}$N(1440)P${}_{11}$ allow us to conclude that these results provide strong evidence in favor of N(1440)P${}_{11}$ as a first radial excitation of the $3q$ ground state. The results of the present paper also confirm the conclusion of our previous analysis for ${Q}^{2}l1$ GeV${}^{2}$ that the presentation of N(1440)P${}_{11}$ as a q$^{3}\mathrm{G}$ hybrid state is ruled out.
Published: 2008

5. Electroproduction ofϕ(1020)mesons at1.4⩽Q2⩽3.8GeV2measured with the CLAS spectrometer

Author: M. Guidal, R. Nasseripour, M. Holtrop, I. I. Strakovsky, R. J. Feuerbach, G. V. O'Rielly, Cynthia Marie Hadjidakis, B. Zhao, Z. W. Zhao, D. G. Jenkins, Alexei V. Klimenko, R. De Masi, A. Deur, Michael Dugger, H. O. Funsten, Michael Wood, K. Hafidi, N. Dashyan, B. E. Stokes, G. S. Adams, Barry Ritchie, P. L. Cole, B. M. Preedom, V. S. Serov, C. E. Hyde-Wright, S. McAleer, J. Langheinrich, S. S. Stepanyan, S. A. Philips, L. Blaszczyk, G. Ricco, J. Ball, F. W. Hersman, Sergey Kuleshov, Lorenzo Zana, J. P. Santoro, M. Bektasoglu, M. Nozar, M. Garçon, Elton Smith, M. Battaglieri, J. Salamanca, J. Lachniet, A. Tkabladze, Latifa Elouadrhiri, P. Coltharp, H. Hakobyan, F. Sabatié, H. S. Jo, K. Livingston, D. S. Dale, J. W C McNabb, J. R. Ficenec, N. A. Baltzell, V. Kuznetsov, R. Bradford, R. C. Minehart, Kei Moriya, C. A. Meyer, J. W. Price, M. M. Ito, S. Strauch, V. Mokeev, C. Salgado, L. Cheng, B. L. Berman, L. M. Qin, D. P. Watts, H. Egiyan, K. A. Griffioen, J. P. Cummings, V. Gyurjyan, G. V. Fedotov, S. A. Morrow, M. Anghinolfi, E. De Sanctis, V. P. Kubarovsky, D. Keller, Nikolay Shvedunov, Friedrich Klein, R. Dickson, James Mueller, C. Paterson, D. I. Sober, O. Pogorelko, C. Djalali, E. Munevar, D. P. Weygand, L. C. Smith, M. Kossov, L. C. Dennis, J. Zhang, B. E. Bonner, H. Avakian, Ji Li, M. Guillo, Brian Raue, S. Niccolai, I. Popa, S. Dhamija, N. Hassall, M. Bellis, H. Bagdasaryan, F. X. Girod, B. S. Ishkhanov, S. Park, R. Fatemi, N. Kalantarians, W. Gohn, A. V. Vlassov, J. R. Johnstone, D. Sharov, M. D. Mestayer, Y. G. Sharabian, Sylvain Bouchigny, J. Hardie, H. G. Juengst, J. Kuhn, L. El Fassi, C. Marchand, G. Audit, E. Wolin, H. Denizli, E. L. Isupov, R. De Vita, J. D. Kellie, L. Morand, Michael L. Williams, P. Rossi, N. Guler, William Brooks, Christian Weiss, A.V. Stavinsky, M. R. Niroula, R. W. Gothe, S. Boiarinov, W. Kim, M. Mirazita, W. J. Briscoe, L. Casey, G. Gavalian, C. Hanretty, S. Tkachenko, S. Anefalos Pereira, G. Niculescu, P. Nadel-Turonski, N. Benmouna, J. P. Ball, Tsutomu Mibe, Y. Prok, D. S. Carman, A. V. Skabelin, A. Cazes, Maryam Moteabbed, Hall Crannell, Bernhard Mecking, D. J. Tedeschi, M. Ripani, E. Pasyuk, V. Crede, Shifeng Chen, G. Rosner, K. V. Dharmawardane, J. R. Calarco, S. A. Dytman, I. Bedlinskiy, B. B. Niczyporuk, L. Guo, M. Ungaro, N. Pivnyuk, D. G. Crabb, R. A. Schumacher, M. Khandaker, S. Barrow, P. Mattione, M. S. Saini, P. Eugenio, M. Taiuti, K. Joo, G. S. Mutchler, Michael Vineyard, D. Cords, L. Graham, C. I O Gordon, A. Yegneswaran, M. Yurov, J. T. Goetz, S. Mehrabyan, S. Bültmann, V. Sapunenko, P. Collins, Dinko Pocanic, J. J. Melone, M. Osipenko, S. Procureur, T. A. Forest, C. Bookwalter, G. Riccardi, S. Stepanyan, S. E. Kuhn, Kalvir S. Dhuga, C. Butuceanu, J. Pierce, Avraham Klein, C. Tur, G. E. Dodge, L. Todor, H. Y. Lu, P. V. Degtyarenko, M. J. Amaryan, D. Protopopescu, M. MacCormick, I. Hleiqawi, S. Pozdniakov, I. Niculescu, D. Lawrence, S. L. Careccia, D. Schott, K. L. Giovanetti, Larry Weinstein, D. Doughty, D. Heddle, Y. Ilieva, B. Moreno, R. A. Miskimen, B. McKinnon, D. Branford, J. M. Laget, N. Gevorgyan, A. I. Ostrovidov, K. Park, D. G. Ireland, Volker D. Burkert, A. S. Biselli, Z. Krahn, N. Baillie, Laird Kramer, Gerard Gilfoyle, D. Sokhan, A. Fradi, N. Markov, G. Asryan, O. P. Dzyubak, R. A. Niyazov, P. Corvisiero, K. S. Egiyan, K. Mikhailov, P. Stoler, and K. Hicks
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Vector meson dominance, 01 natural sciences, Helicity, Gluon, 0103 physical sciences, Exponent, Vector meson, 010306 general physics, Nucleon, Exchange model
Abstract: Electroproduction of exclusive \ensuremath{\phi} vector mesons has been studied with the CLAS detector in the kinematic range $1.4\ensuremath{\leqslant}{Q}^{2}\ensuremath{\leqslant}3.8$ GeV${}^{2},0.0\ensuremath{\leqslant}{t}^{'}\ensuremath{\leqslant}3.6$ GeV${}^{2}$, and $2.0\ensuremath{\leqslant}W\ensuremath{\leqslant}3.0$ GeV. The scaling exponent for the total cross section as $1/({Q}^{2}+{M}_{\ensuremath{\phi}}^{2}){}^{n}$ was determined to be $n=2.49\ifmmode\pm\else\textpm\fi{}0.33$. The slope of the four-momentum transfer ${t}^{'}$ distribution is ${b}_{\ensuremath{\phi}}=0.98\ifmmode\pm\else\textpm\fi{}0.17$ GeV${}^{\ensuremath{-}2}$. Under the assumption of $s$-channel helicity conservation, we determine the ratio of longitudinal to transverse cross sections to be $R=0.86\ifmmode\pm\else\textpm\fi{}0.24$. A two-gluon exchange model is able to reproduce the main features of the data.
Published: 2008

6. Ratios ofN15/C12andHe4/C12inclusive electroproduction cross sections in the nucleon resonance region

Author: K. S. Egiyan, L. Guo, K. Mikhailov, Calarco, P. Stoler, K. Hicks, Susan Taylor, M. Ungaro, C. D. Keith, J. Donnelly, G. Asryan, O. P. Dzyubak, R. A. Niyazov, H. Egiyan, P. Corvisiero, C. E. Hyde-Wright, Y. Ilieva, R. A. Miskimen, G. Ricco, M. Amarian, E. Wolin, B. Zhao, B. McKinnon, R. Fatemi, S. Strauch, Laird Kramer, K. Park, B. B. Niczyporuk, P. Dragovitsch, Nikolay Shvedunov, J. P. Ball, Y. Prok, D. S. Carman, K. Joo, L. M. Qin, R. Suleiman, D. Branford, N. Pivnyuk, Shifeng Chen, A. V. Vlassov, Sergey Kuleshov, J. Yun, D. Cords, M. Mirazita, D. G. Crabb, J. M. Laget, M. Bektasoglu, G. S. Mutchler, S. Niccolai, A. Yegneswaran, M. Battaglieri, Niroula, A. Fradi, M. Nozar, N. A. Baltzell, J. Hardie, P. Eugenio, H. G. Juengst, S. A. Morrow, R. De Vita, O. Pogorelko, C. Djalali, Kubarovsky, C. Paterson, Friedrich Klein, K. A. Griffioen, R. J. Feuerbach, N. Markov, K. Livingston, M. Klusman, M. Taiuti, A.V. Stavinsky, N. Kalantarians, Brian Raue, F. W. Hersman, R. Bradford, K. Lukashin, Marco A. Huertas, D. J. Tedeschi, J. Langheinrich, A. I. Ostrovidov, A. C S Lima, J. T. Goetz, J. Shaw, E. Polli, S. S. Stepanyan, Crede, S. A. Philips, P. Collins, D. G. Ireland, Michael Wood, K. Hafidi, I. Bedlinskiy, Batourine, Elton Smith, Gerard Gilfoyle, Mestayer, Volker D. Burkert, V. S. Serov, L. C. Dennis, A. S. Biselli, N. Guler, B. E. Bonner, H. Avakian, B. Carnahan, G. Gavalian, S. Tkachenko, M. Anghinolfi, N. Benmouna, M. Ripani, Kwangsoo Kim, J. Kuhn, J. Zhang, S Anefalos, R. W. Gothe, G. Riccardi, A. Cazes, James Mueller, J. W C McNabb, Maryam Moteabbed, Bernhard Mecking, J. D. Kellie, S. Barrow, C. Butuceanu, K. V. Dharmawardane, E. Pasyuk, H. Bagdasaryan, Mokeev, Cynthia Marie Hadjidakis, E. De Sanctis, P. D. Rubin, K. Y. Kim, Y. G. Sharabian, M. Guidal, S. A. Dytman, R. G. Fersch, Michael Dugger, H. O. Funsten, L. Todor, N. Baillie, D. I. Sober, D. Protopopescu, M. Holtrop, S. Pozdniakov, M. Garçon, Hong Lu, Sbr Ultmann, Dinko Pocanic, Sylvain Bouchigny, P. L. Cole, P. Rossi, S. E. Kuhn, M. Bellis, J. Lachniet, H. Denizli, A. Tkabladze, D. Rowntree, Sapunenko, R. S. Hakobyan, A. V. Skabelin, P. Nadel-Turonski, Tsutomu Mibe, R. C. Minehart, C. A. Meyer, G. V. Fedotov, B. E. Stokes, G. S. Adams, D. P. Weygand, U. Thoma, M. Khandaker, L. C. Smith, B. S. Ishkhanov, D. Doughty, D. Heddle, Gyurjyan, W. Kim, S. Stepanyan, G. Niculescu, M. MacCormick, I. Hleiqawi, G. Rosner, R. Nasseripour, P. Bosted, S. L. Careccia, K. L. Giovanetti, Larry Weinstein, P. Coltharp, M. M. Ito, M. Osipenko, F. Sabatié, M. Guillo, K. Beard, L. Elouadrhiri, A. Deur, W. K. Brooks, R. A. Schumacher, G. V. O'Rielly, E. Golovatch, L. Morand, T. A. Forest, J. Pierce, Avraham Klein, Z. W. Zhao, J. P. Cummings, Hall Crannell, M. Kossov, D. G. Jenkins, G. E. Dodge, P. V. Degtyarenko, S. McAleer, F. X. Girod, I. Niculescu, D. Lawrence, J. W. Price, R. De Masi, Ji Li, E. L. Isupov, Michael L. Williams, S. Boiarinov, Michael Vineyard, B. M. Preedom, Lorenzo Zana, J. P. Santoro, H. S. Jo, and C. Salgado
Subjects: Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Scattering, Hadron, Carbon-12, Deep inelastic scattering, 01 natural sciences, Nuclear physics, Baryon, Helium-4, 0103 physical sciences, Phenomenological model, Atomic physics, 010306 general physics, Nucleon
Abstract: The (W,Q{sup 2}) dependence of the ratio of inclusive electron scattering cross sections for {sup 15}N/{sup 12}C was determined in the kinematic ranges 0.8
Published: 2008

7. Polarized structure functionσLT'forH1(e→,e'K+)Λin the nucleon resonance region

Author: L. C. Dennis, B. E. Bonner, S. McAleer, F. X. Girod, L. Blaszczyk, H. Avakian, D. Sharov, D. Lawrence, P. Stoler, K. Hicks, K. S. Egiyan, Laird Kramer, D. Doughty, L. C. Smith, E. Munevar, V. Mokeev, K. Mikhailov, Elton Smith, J. Langheinrich, S. S. Stepanyan, S. A. Philips, W. J. Briscoe, E. Pasyuk, B. S. Ishkhanov, D. P. Watts, S. A. Dytman, R. A. Schumacher, P. Eugenio, D. Heddle, H. Egiyan, J. W. Price, M. F. Vineyard, G. Asryan, O. P. Dzyubak, R. A. Niyazov, P. Nadel-Turonski, Tsutomu Mibe, H. G. Juengst, P. Corvisiero, E. Wolin, M. Taiuti, M. Anghinolfi, M. Kossov, James Mueller, E. De Sanctis, M. R. Niroula, J. P. Ball, M. Battaglieri, Y. Ilieva, P. D. Rubin, Y. G. Sharabian, A.V. Stavinsky, D. S. Carman, Patrick Girard, W. Kim, T. A. Forest, G. Niculescu, J. Lachniet, D. I. Sober, R. J. Feuerbach, Michael Wood, A. I. Ostrovidov, V. Sapunenko, L. Casey, Dinko Pocanic, R. Bradford, K. Lukashin, D. J. Tedeschi, K. Park, C. Hanretty, S. Stepanyan, K. Hafidi, D. G. Crabb, J. Pierce, V. S. Serov, S. E. Kuhn, Avraham Klein, E. Anciant, B. E. Stokes, B. B. Niczyporuk, I. Bedlinskiy, G. Ricco, D. G. Ireland, B. Moreno, G. E. Dodge, H. Y. Lu, P. V. Degtyarenko, N. Pivnyuk, Volker D. Burkert, A. S. Biselli, G. Audit, C. E. Hyde-Wright, R. Fatemi, A. V. Vlassov, R. De Vita, Z. W. Zhao, V. Kuznetsov, K. Joo, S. Procureur, Maryam Moteabbed, B. Zhao, D. G. Jenkins, Bernhard Mecking, Z. Krahn, Shifeng Chen, D. Sayre, S. Strauch, P. Collins, D. Protopopescu, I. Niculescu, M. Khandaker, S. Pozdniakov, Sylvain Bouchigny, J. J. Manak, P. Rossi, N. Baillie, S. Anefalos Pereira, A. Fradi, C. Cetina, A. Shafi, P. Dragovitsch, P. Mattione, Friedrich Klein, Kwangsoo Kim, R. A. Miskimen, B. McKinnon, V. P. Kubarovsky, G. Riccardi, J. Salamanca, Sergey Kuleshov, M. Osipenko, R. De Masi, Brian Raue, D. Branford, M. Mirazita, J. M. Laget, J. W C McNabb, S. A. Morrow, C. Djalali, G. S. Mutchler, M. Bektasoglu, S. Niccolai, F. Sabatié, N. Gevorgyan, C. Butuceanu, K. Beard, F. W. Hersman, N. A. Baltzell, J. T. Goetz, K. Livingston, D. S. Dale, N. Markov, O. Pogorelko, P. Coltharp, V. Crede, K. A. Griffioen, R. Dickson, J. Hardie, M. J. Amaryan, Kalvir S. Dhuga, P. Ambrozewicz, Gerard Gilfoyle, M. Nozar, D. Sokhan, M. MacCormick, M. Bellis, I. Hleiqawi, M. M. Ito, S. L. Careccia, J. Kuhn, R. W. Gothe, G. Gavalian, N. Guler, J. R. Calarco, G. A. Peterson, S. Simionatto, J. D. Kellie, S. Taylor, S. Tkachenko, K. Y. Kim, K. L. Giovanetti, B. Asavapibhop, J. P. Santoro, Roy Thompson, Larry Weinstein, S. Barrow, N. Benmouna, M. Ripani, M. Guidal, M. Guillo, L. Cheng, M. D. Mestayer, G. Rosner, R. Nasseripour, Nikolay Shvedunov, J. Hu, E. L. Isupov, L. Elouadrhiri, M. Holtrop, Michael L. Williams, S. Boiarinov, I. I. Strakovsky, B. M. Preedom, A. Deur, Lorenzo Zana, N. Kalantarians, H. Hakobyan, H. S. Jo, Gerald Feldman, Michael Dugger, W. K. Brooks, K. Wang, H. O. Funsten, C. Salgado, B. L. Berman, L. M. Qin, C. Paterson, Thierry Auger, M. Garçcon, J. R. Johnstone, V. Gyurjyan, J. Zhang, H. Bagdasaryan, L. Guo, M. Ungaro, A. Tkabladze, J. Yun, D. Cords, L. El Fassi, A. Yegneswaran, P. L. Cole, Y. Prok, Barry Ritchie, R. C. Minehart, Kei Moriya, C. A. Meyer, G. V. Fedotov, D. P. Weygand, A. V. Skabelin, and N. Dashyan
Subjects: Physics, Nuclear and High Energy Physics, Angular range, 010308 nuclear & particles physics, Hydrogen-1, Structure function, Hyperon, Sigma, Resonance, Lambda, 01 natural sciences, 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon
Abstract: The first measurements of the polarized structure function {sigma}{sub LT{sup '}} for the reaction {sup 1}H(e-vector,e{sup '}K{sup +}){lambda} in the nucleon resonance region are reported. Measurements are included from threshold up to W=2.05 GeV for central values of Q{sup 2} of 0.65 and 1.00 GeV{sup 2}, and nearly the entire kaon center-of-mass angular range. {sigma}{sub LT{sup '}} is the imaginary part of the longitudinal-transverse response and is expected to be sensitive to interferences between competing intermediate s-channel resonances, as well as resonant and nonresonant processes. The results for {sigma}{sub LT{sup '}} are comparable in magnitude to previously reported results from CLAS for {sigma}{sub LT}, the real part of the same response. An intriguing sign change in {sigma}{sub LT{sup '}} is observed in the high Q{sup 2} data at W{approx_equal}1.9 GeV. Comparisons to several existing model predictions are shown.
Published: 2008

8. Cross sections and beam asymmetries fore→p→enπ+in the nucleon resonance region for1.7⩽Q2⩽4.5GeV2

Author: R. Fatemi, A. V. Vlassov, T. Lee, H. G. Juengst, A. Fradi, R. De Vita, A.V. Stavinsky, N. Markov, N. Hassall, B. Zhao, D. J. Tedeschi, S. Park, Sylvain Bouchigny, K. Hafnaoui, K. Livingston, D. S. Dale, G. Rosner, R. Nasseripour, I. Bedlinskiy, S. Anefalos Pereira, P. Rossi, E. Wolin, R. Dickson, Ji Li, J. P. Ball, Y. Prok, F. W. Hersman, V. Kuznetsov, J. P. Cummings, V. Sapunenko, Dinko Pocanic, C. Hanretty, N. Guler, S. McAleer, F. X. Girod, L. Blaszczyk, D. G. Ireland, V. Crede, S. E. Kuhn, M. Osipenko, F. Sabatié, J. Lachniet, H. Denizli, A. Tkabladze, J. R. Johnstone, M. Kossov, J. R. Calarco, D. G. Crabb, D. Rowntree, J. Donnelly, G. Asryan, O. P. Dzyubak, R. A. Niyazov, A. I. Ostrovidov, A. C S Lima, R. Suleiman, I. Popa, G. S. Mutchler, L. Guo, G. E. Dodge, H. Y. Lu, M. Ungaro, D. Doughty, M. D. Mestayer, S. Niccolai, E. De Sanctis, Volker D. Burkert, A. S. Biselli, E. L. Isupov, C. Tur, M. Guillo, D. Heddle, W. Gohn, M. Guidal, J. Hardie, Z. Krahn, J. Kuhn, P. L. Cole, S. Barrow, Elton Smith, Friedrich Klein, M. Yurov, Kalvir S. Dhuga, Michael L. Williams, P. V. Degtyarenko, N. Baillie, M. Anghinolfi, James Mueller, A. V. Skabelin, L. Todor, D. Protopopescu, S. Mehrabyan, D. I. Sober, S. Pozdniakov, M. Garçon, J. Yun, D. Cords, S. S. Stepanyan, S. Boiarinov, P. D. Rubin, Y. G. Sharabian, A. Yegneswaran, R. A. Miskimen, Brian Raue, B. McKinnon, Atilla Gonenc, R. C. Minehart, Kei Moriya, C. A. Meyer, J. W. Price, T. Takeuchi, M. Holtrop, I. Niculescu, C. Bookwalter, G. V. Fedotov, W. Kim, G. Niculescu, G. Gavalian, Laird Kramer, G. Riccardi, D. Lawrence, Baile Zhang, Shifeng Chen, S. Dhamija, J. Shaw, P. Corvisiero, S. Tkachenko, L. El Fassi, D. Branford, Michael Wood, R. De Masi, B. E. Stokes, K. Hafidi, C. Butuceanu, D. Keller, D. Schott, G. S. Adams, N. A. Baltzell, V. Gyurjyan, N. Benmouna, M. Ripani, K. Joo, N. Dashyan, P. Mattione, D. P. Weygand, M. S. Saini, M. Mirazita, J. M. Laget, V. S. Serov, R. W. Gothe, Y. Ilieva, N. Gevorgyan, Michael Vineyard, J. Zhang, P. Nadel-Turonski, Alexei V. Klimenko, L. Cheng, Tsutomu Mibe, B. M. Preedom, L. Elouadrhiri, J. Langheinrich, K. Y. Kim, Nikolay Shvedunov, J. T. Goetz, E. Polli, H. Bagdasaryan, Lorenzo Zana, J. P. Santoro, Barry Ritchie, S. A. Philips, M. Khandaker, P. Eugenio, M. Taiuti, G. V. O'Rielly, Z. W. Zhao, I. I. Strakovsky, P. Stoler, J. D. Kellie, S. A. Morrow, V. P. Kubarovsky, V. Mokeev, R. A. Schumacher, B. Moreno, Gerard Gilfoyle, G. Ricco, C. Djalali, H. Hakobyan, H. S. Jo, Gerald Feldman, K. Hicks, O. Pogorelko, A. Deur, D. G. Jenkins, Federico Ronchetti, L. C. Dennis, L. Graham, P. Collins, B. E. Bonner, J. J. Melone, C. Salgado, D. Sokhan, K. Park, Daniel S. Carman, M. J. Amaryan, K. S. Egiyan, C. I O Gordon, N. Kalantarians, H. Avakian, W. K. Brooks, M. MacCormick, I. Hleiqawi, C. E. Hyde-Wright, D. Sharov, P. Ambrozewicz, K. Mikhailov, S. Bültmann, L. Morand, T. A. Forest, Cynthia Marie Hadjidakis, S. L. Careccia, Sergey Kuleshov, S. Stepanyan, K. L. Giovanetti, J. Pierce, Avraham Klein, Larry Weinstein, M. Bektasoglu, M. Nozar, Michael Dugger, H. O. Funsten, W. J. Briscoe, E. Pasyuk, S. A. Dytman, J. Salamanca, J. W C McNabb, L. Casey, B. B. Niczyporuk, N. Pivnyuk, V. Batourine, M. Battaglieri, L. C. Smith, E. Munevar, B. S. Ishkhanov, B. L. Berman, R. Bradford, B. A. Mecking, K. Lukashin, L. M. Qin, R. S. Hakobyan, K. A. Griffioen, C. Paterson, M. Klusman, D. P. Watts, M. R. Niroula, E. Golovatch, M. Bellis, S. Strauch, H. Egiyan, A. Cazes, Maryam Moteabbed, P. Coltharp, K. V. Dharmawardane, M. Y. Gabrielyan, R. J. Feuerbach, M. M. Ito, and Inna Aznauryan
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Resonance, 01 natural sciences, Excited state, Isospin, 0103 physical sciences, Production (computer science), Invariant mass, Sensitivity (control systems), Atomic physics, 010306 general physics, Nucleon
Abstract: The exclusive electroproduction process $\stackrel{\ensuremath{\rightarrow}}{e}p\ensuremath{\rightarrow}{e}^{'}n{\ensuremath{\pi}}^{+}$ was measured in the range of the photon virtuality ${Q}^{2}=1.7\text{\ensuremath{-}}4.5 {\mathrm{GeV}}^{2}$, and the invariant mass range for the $n{\ensuremath{\pi}}^{+}$ system of $W=1.15\text{\ensuremath{-}}1.7 \mathrm{GeV}$ using the CEBAF Large Acceptance Spectrometer. For the first time, these kinematics are probed in exclusive ${\ensuremath{\pi}}^{+}$ production from protons with nearly full coverage in the azimuthal and polar angles of the $n{\ensuremath{\pi}}^{+}$ center-of-mass system. The $n{\ensuremath{\pi}}^{+}$ channel has particular sensitivity to the isospin \textonehalf{} excited nucleon states, and together with the $p{\ensuremath{\pi}}^{0}$ final state will serve to determine the transition form factors of a large number of resonances. The largest discrepancy between these results and present modes was seen in the ${\ensuremath{\sigma}}_{{\mathit{LT}}^{'}}$ structure function. In this experiment, 31,295 cross section and 4,184 asymmetry data points were measured. Because of the large volume of data, only a reduced set of structure functions and Legendre polynomial moments can be presented that are obtained in model-independent fits to the differential cross sections.
Published: 2008

9. π0photoproduction on the proton for photon energies from 0.675 to 2.875 GeV

Author: B. M. Preedom, J. P. Ball, D. S. Carman, L. C. Dennis, B. E. Bonner, R. A. Schumacher, H. Avakian, J. Kuhn, J. P. Santoro, Roy Thompson, B. Carnahan, D. G. Crabb, P. Eugenio, M. Taiuti, P. Collins, R. A. Niyazov, F. Sabatié, S. Bültmann, T. A. Forest, A. I. Ostrovidov, J. Langheinrich, A. C S Lima, W. J. Briscoe, V. Gyurjyan, S. S. Stepanyan, P. Stoler, J. Slamanca, S. A. Philips, S. Stepanyan, H. S. Jo, Gerald Feldman, E. Pasyuk, Valeria Muccifora, J. Pierce, Avraham Klein, D. Doughty, S. A. Dytman, D. G. Ireland, K. Wang, K. Hicks, J. Zhang, H. Bagdasaryan, D. Heddle, L. Elouadrhiri, R. J. Feuerbach, I. I. Strakovsky, Volker D. Burkert, B. B. Niczyporuk, A. S. Biselli, Gerard Gilfoyle, Marco A. Huertas, H. G. Juengst, L. Zana, G. E. Dodge, P. Coltharp, A. Deur, B. E. Stokes, W. K. Brooks, N. Pivnyuk, P. V. Degtyarenko, G. S. Adams, W. Kim, G. Gavalian, A.V. Stavinsky, J. Shaw, G. Niculescu, J. Napolitano, B. L. Berman, J. Donnelly, G. Asryan, O. P. Dzyubak, S. Tkachenko, Federico Ronchetti, Kwangsoo Kim, G. Riccardi, R. Fatemi, C. Butuceanu, Laird Kramer, M. M. Ito, L. M. Qin, F. W. Hersman, M. Kossov, A. V. Vlassov, Sylvain Bouchigny, P. Rossi, E. Anciant, G. V. O'Rielly, M. D. Mestayer, K. Joo, I. Niculescu, D. Lawrence, N. Benmouna, P. Corvisiero, M. Ripani, Carlos A. Salgado, G. Ricco, Michael L. Williams, Victor Mokeev, T. Lee, D. J. Tedeschi, M. Amarian, L. Guo, P. Nadel-Turonski, Tsutomu Mibe, Z. Krahn, Y. Ilieva, M. Spraker, M. Ungaro, Michael Wood, V. S. Serov, M. Guidal, Susan Taylor, S. Strauch, M. Khandaker, N. Baillie, C. Paterson, M. Klusman, S. Boiarinov, J. P. Cummings, R. De Vita, R. A. Miskimen, K. Park, K. S. Egiyan, B. McKinnon, D. G. Jenkins, H. Egiyan, L. C. Maximon, K. Mikhailov, A. Coleman, I. Hleiqawi, H. R. Weller, J. R. Calarco, M. Guillo, I. Bedlinskiy, S. L. Careccia, S. Simionatto, M. Holtrop, S. McAleer, Friedrich Klein, D. Branford, F. X. Girod, Brian Raue, N. Kalantarians, Hall Crannell, J. J. Manak, M. Osipenko, M. Mirazita, K. L. Giovanetti, B. Asavapibhop, Cynthia Marie Hadjidakis, J. M. Laget, A. Tkabladze, J. Yun, D. Cords, Larry Weinstein, J. W C McNabb, D. Rowntree, K. Beard, L. C. Smith, A. Yegneswaran, Michael Dugger, H. O. Funsten, Michael Vineyard, V. P. Kubarovsky, Nicola Bianchi, R. W. Gothe, B. S. Ishkhanov, Kalvir S. Dhuga, C. Marchand, V. Kuznetsov, S. A. Morrow, C. Djalali, L. Todor, A. Empl, R. S. Hakobyan, O. Pogorelko, K. Y. Kim, G. Rosner, R. Nasseripour, E. De Sanctis, D. Protopopescu, J. W. Price, M. R. Niroula, S. Pozdniakov, M. Garçon, G. Audit, C. E. Hyde-Wright, J. Lachniet, D. I. Sober, A. Shafi, P. Ambrozewicz, P. Dragovitsch, M. Bektasoglu, M. Nozar, K. Livingston, S. Niccolai, P. L. Cole, R. Dickson, J. Hardie, N. Guler, S. Barrow, M. Battaglieri, N. A. Baltzell, K. A. Griffioen, J. D. Kellie, Ron L. Workman, R. Bradford, K. Lukashin, G. S. Mutchler, M. Bellis, J. Hu, Alexei V. Klimenko, R. A. Arndt, Barry Ritchie, Bernhard Mecking, K. V. Dharmawardane, R. C. Minehart, Kei Moriya, C. A. Meyer, G. V. Fedotov, Y. Prok, D. P. Weygand, H. Denizli, A. V. Skabelin, Shifeng Chen, J. T. Goetz, V. Sapunenko, Dinko Pocanic, S. E. Kuhn, C. Tur, Elton Smith, J. R. Ficenec, M. Anghinolfi, James Mueller, P. D. Rubin, Y. G. Sharabian, and E. Wolin
Subjects: Physics, Normalization (statistics), Nuclear and High Energy Physics, Particle physics, Photon, Spectrometer, Proton, 010308 nuclear & particles physics, Forward scatter, Scattering, 01 natural sciences, Particle identification, Nuclear physics, 0103 physical sciences, Photon beam, Nuclear Experiment, 010306 general physics
Abstract: Differential cross sections for the reaction $\gamma p \to p \pi^0$ have been measured with the CEBAF Large Acceptance Spectrometer (CLAS) and a tagged photon beam with energies from 0.675 to 2.875 GeV. The results reported here possess greater accuracy in the absolute normalization than previous measurements. They disagree with recent CB-ELSA measurements for the process at forward scattering angles. Agreement with the SAID and MAID fits is found below 1 GeV. The present set of cross sections has been incorporated into the SAID database, and exploratory fits have been extended to 3 GeV. Resonance couplings have been extracted and compared to previous determinations.
Published: 2007

10. Q2dependence of theS11(1535)photocoupling and evidence for aP-wave resonance in η electroproduction

Author: S. A. Morrow, Laird Kramer, P. Dragovitsch, P. Stoler, Barry Ritchie, J. Hardie, S. O. Nelson, K. Hicks, H. G. Juengst, M. L. Leber, Federico Ronchetti, K. Livingston, A.V. Stavinsky, D. J. Tedeschi, J. Kuhn, N. A. Baltzell, R. C. Minehart, C. A. Meyer, G. V. Fedotov, R. Dickson, L. Elouadrhiri, H. Denizli, J. P. Santoro, Roy Thompson, D. P. Weygand, I. Bedlinskiy, K. A. Griffioen, G. Ricco, N. Markov, J. Langheinrich, S. S. Stepanyan, N. Dashyan, S. A. Philips, I. I. Strakovsky, N. Guler, M. Bellis, G. A. Peterson, K. S. Egiyan, Nikolay Shvedunov, A. Deur, V. Frolov, M. J. Amaryan, K. Mikhailov, Shifeng Chen, R. J. Feuerbach, A. I. Ostrovidov, P. Eugenio, R. Fatemi, B. B. Niczyporuk, S. Barrow, W. K. Brooks, M. Taiuti, V. Batourine, I. Hleiqawi, Friedrich Klein, Y. Ilieva, C. Cetina, A. V. Vlassov, S. L. Careccia, N. Kalantarians, J. Hu, J. D. Kellie, J. P. Cummings, S. Simionatto, C. E. Hyde-Wright, Brian Raue, N. Pivnyuk, J. Napolitano, Michael Vineyard, L. Farhi, D. Rowntree, Sergey Kuleshov, N. Baillie, J. T. Goetz, E. Polli, M. Bektasoglu, M. Nozar, V. Gyurjyan, G. V. O'Rielly, P. Collins, Maryam Moteabbed, K. L. Giovanetti, B. Asavapibhop, M. Kossov, M. MacCormick, Valeria Muccifora, Bernhard Mecking, V. Sapunenko, Dinko Pocanic, R. De Vita, J. Zhang, M. Guidal, Z. W. Zhao, G. Gavalian, S. Tkachenko, R. A. Schumacher, Susan Taylor, N. Benmouna, P. L. Cole, M. Spraker, Larry Weinstein, D. Doughty, G. Rosner, L. C. Smith, S. J. Gaff, H. Bagdasaryan, R. Nasseripour, M. Holtrop, D. G. Jenkins, C. Djalali, M. D. Mestayer, E. L. Isupov, M. Ripani, L. Guo, S. Strauch, Gerard Gilfoyle, K. Sabourov, D. Heddle, Nicola Bianchi, D. P. Watts, H. Egiyan, S. Bültmann, M. Ungaro, Michael L. Williams, B. S. Ishkhanov, Sylvain Bouchigny, S. E. Kuhn, T. A. Forest, D. Sokhan, S. Stepanyan, P. Nadel-Turonski, B. E. Stokes, J. W. Price, J. Pierce, Avraham Klein, G. S. Adams, Tsutomu Mibe, G. E. Dodge, J. J. Manak, S. Boiarinov, Michael Dugger, S. McAleer, B. M. Preedom, H. Y. Lu, P. Rossi, H. O. Funsten, F. X. Girod, P. V. Degtyarenko, D. Protopopescu, R. A. Miskimen, B. McKinnon, J. H. Kelley, K. Joo, G. S. Mutchler, S. Pozdniakov, M. Garçon, L. M. Qin, J. Yun, D. Cords, C. Tur, Lorenzo Zana, D. G. Ireland, A. Shafi, A. Yegneswaran, I. Niculescu, M. Battaglieri, V. Crede, D. Lawrence, D. Branford, P. Ambrozewicz, H. Hakobyan, Kwangsoo Kim, G. Riccardi, Gerald Feldman, K. Moriya, U. Thoma, J. R. Calarco, A. Tkabladze, M. Mirazita, J. M. Laget, C. Paterson, Elton Smith, K. Wang, C. Salgado, Atilla Gonenc, M. R. Niroula, M. Klusman, R. Bradford, K. Lukashin, C. Butuceanu, M. Guillo, E. De Sanctis, M. Khandaker, M. Anghinolfi, E. Wolin, H. S. Jo, R. S. Hakobyan, James Mueller, L. El Fassi, P. D. Rubin, J. P. Ball, Y. Prok, Y. G. Sharabian, D. S. Carman, J. Lachniet, D. I. Sober, S. Niccolai, D. G. Crabb, J. Salamanca, J. W C McNabb, A. Coleman, H. R. Weller, Volker D. Burkert, A. S. Biselli, J. Donnelly, G. Asryan, O. P. Dzyubak, R. A. Niyazov, P. Corvisiero, J. Miles, P. Coltharp, M. Osipenko, F. Sabatié, M. M. Ito, K. Beard, R. W. Gothe, Kalvir S. Dhuga, K. Y. Kim, W. Kim, A. V. Skabelin, G. Niculescu, B. Zhao, R. D. Levine, V. Mokeev, F. W. Hersman, L. C. Dennis, B. E. Bonner, H. Avakian, W. J. Briscoe, E. Pasyuk, S. A. Dytman, Patrick Girard, J. Shaw, Michael Wood, K. Hafidi, V. S. Serov, K. Park, V. P. Kubarovsky, A. Empl, and O. Pogorelko
Subjects: Baryon, Scattering cross-section, Physics, Nuclear and High Energy Physics, Cross section.transverse, Particle physics, Amplitude, Photon, Angular distribution, Momentum transfer, Resonance, High Energy Physics::Experiment
Abstract: New cross sections for the reaction $\mathit{ep}\ensuremath{\rightarrow}{e}^{'}\ensuremath{\eta}p$ are reported for total center-of-mass energy $W=1.5\text{\ensuremath{-}}2.3$ GeV and invariant squared momentum transfer ${Q}^{2}=0.13\text{\ensuremath{-}}3.3$ GeV${}^{2}$. This large kinematic range allows the extraction of new information about response functions, photocouplings, and $\ensuremath{\eta}N$ coupling strengths of baryon resonances. A sharp structure is seen at $W~1.7$ GeV. The shape of the differential cross section is indicative of the presence of a $P$-wave resonance that persists to high ${Q}^{2}$. Improved values are derived for the photocoupling amplitude for the ${S}_{11}$(1535) resonance. The new data greatly expand the ${Q}^{2}$ range covered, and an interpretation of all data with a consistent parametrization is provided.
Published: 2007

11. Separated structure functions for the exclusive electroproduction ofK+ΛandK+Σ0final states

Author: Y. Ilieva, L. C. Dennis, B. E. Bonner, J. Kuhn, J. P. Santoro, Elton Smith, D. P. Watts, Roy Thompson, Nicola Bianchi, R. W. Gothe, H. Avakian, H. Egiyan, Latifa Elouadrhiri, R. C. Minehart, Kei Moriya, D. G. Ireland, P. Eugenio, V. Crede, M. Taiuti, P. Collins, Michael Dugger, C. A. Meyer, H. O. Funsten, K. Livingston, P. L. Cole, M. Anghinolfi, G. V. Fedotov, R. A. Miskimen, B. McKinnon, K. Y. Kim, N. Markov, A. Tkabladze, J. R. Calarco, E. Wolin, R. Dickson, I. I. Strakovsky, James Mueller, D. Rowntree, D. Branford, E. De Sanctis, A. Deur, K. S. Egiyan, W. J. Briscoe, P. D. Rubin, J. P. Ball, B. Zhao, E. Pasyuk, M. Mirazita, J. M. Laget, N. Guler, J. Lachniet, D. I. Sober, A. I. Ostrovidov, D. Doughty, W. K. Brooks, Y. G. Sharabian, D. P. Weygand, K. Mikhailov, L. El Fassi, D. G. Crabb, V. Batourine, S. A. Dytman, Volker D. Burkert, R. Fatemi, G. V. O'Rielly, D. Heddle, Daniel S. Carman, A. S. Biselli, S. Barrow, A. V. Vlassov, G. Gavalian, F. W. Hersman, P. Dragovitsch, Z. W. Zhao, L. Farhi, S. Tkachenko, V. Sapunenko, D. Sayre, N. Benmouna, M. Ripani, P. Nadel-Turonski, Dinko Pocanic, D. G. Jenkins, D. Protopopescu, Kwangsoo Kim, G. Riccardi, M. Amarian, D. Lawrence, Nikolay Shvedunov, J. P. Cummings, C. E. Hyde-Wright, A. V. Skabelin, K. Park, S. Pozdniakov, M. Garçon, C. Butuceanu, Tsutomu Mibe, P. Stoler, R. De Vita, Laird Kramer, N. Baillie, A. Shafi, S. McAleer, M. Osipenko, F. Sabatié, N. Kalantarians, S. E. Kuhn, F. X. Girod, K. Beard, M. Kossov, P. Coltharp, S. Niccolai, K. Hicks, Valeria Muccifora, B. L. Berman, Sylvain Bouchigny, C. Tur, Y. Prok, Barry Ritchie, Kalvir S. Dhuga, L. M. Qin, Gerard Gilfoyle, R. J. Feuerbach, M. M. Ito, Sergey Kuleshov, M. Guillo, M. Bektasoglu, P. Rossi, M. Nozar, V. P. Kubarovsky, J. Donnelly, G. Asryan, V. Frolov, D. Sokhan, O. P. Dzyubak, R. A. Niyazov, C. Paterson, Atilla Gonenc, J. W. Price, M. Klusman, W. Kim, J. Hardie, M. MacCormick, I. Hleiqawi, L. C. Smith, Shifeng Chen, B. S. Ishkhanov, S. L. Careccia, P. Corvisiero, S. Simionatto, G. Niculescu, K. L. Giovanetti, B. Asavapibhop, S. Taylor, Larry Weinstein, M. R. Niroula, M. Khandaker, H. G. Juengst, M. Guidal, M. Bellis, J. Salamanca, V. Mokeev, M. Holtrop, A.V. Stavinsky, C. Cetina, J. T. Goetz, Jian Zhang, E. Polli, Michael Vineyard, J. Langheinrich, S. S. Stepanyan, S. A. Philips, D. J. Tedeschi, I. Bedlinskiy, J. W C McNabb, J. Hu, M. D. Mestayer, E. L. Isupov, B. B. Niczyporuk, S. Boiarinov, Maryam Moteabbed, N. Pivnyuk, B. M. Preedom, Bernhard Mecking, Lorenzo Zana, J. Napolitano, H. Hakobyan, H. S. Jo, Gerald Feldman, K. Wang, C. Salgado, S. A. Morrow, C. Djalali, M. Battaglieri, R. Bradford, P. Ambrozewicz, K. Lukashin, N. A. Baltzell, K. A. Griffioen, J. J. Manak, J. D. Kellie, S. Strauch, G. S. Mutchler, Mathew Williams, V. Gyurjyan, H. Bagdasaryan, L. Guo, M. Ungaro, K. Joo, J. Yun, D. Cords, A. Yegneswaran, B. E. Stokes, G. Ricco, G. Rosner, R. Nasseripour, A. Empl, O. Pogorelko, Patrick Girard, Michael Wood, K. Hafidi, V. S. Serov, Friedrich Klein, Brian Raue, Federico Ronchetti, G. E. Dodge, H. Y. Lu, P. V. Degtyarenko, I. Niculescu, R. De Masi, R. A. Schumacher, S. Bültmann, T. A. Forest, S. Stepanyan, J. Pierce, Avraham Klein, and N. Dashyan
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Proton, 010308 nuclear & particles physics, Momentum transfer, Hyperon, Sigma, Strangeness, Lambda, 01 natural sciences, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Production (computer science), Nuclear Experiment, 010306 general physics, Energy (signal processing)
Abstract: We report measurements of the exclusive electroproduction of K{sup +}{lambda} and K{sup +}{sigma}{sup 0} final states from a proton target using the Continuous Electron Beam Accelerator Facility (CEBAF) large-acceptance spectrometer (CLAS) detector at the Thomas Jefferson National Accelerator Facility. The separated structure functions {sigma}{sub T},{sigma}{sub L},{sigma}{sub TT}, and {sigma}{sub LT} were extracted from the {phi}- and {epsilon}-dependent differential cross sections taken with electron beam energies of 2.567, 4.056, and 4.247 GeV. This analysis represents the first {sigma}{sub L}/{sigma}{sub T} separation with the CLAS detector, and the first measurement of the kaon electroproduction structure functions away from parallel kinematics. The data span a broad range of momentum transfers from 0.5{
Published: 2007

12. First measurement of beam-recoil observablesCxandCzin hyperon photoproduction

Author: V. Gyurjyan, L. C. Dennis, B. E. Bonner, H. Avakian, Maryam Moteabbed, Bernhard Mecking, J. Zhang, K. V. Dharmawardane, H. Bagdasaryan, K. Park, F. Sabatiã, V. P. Kubarovsky, A. Empl, O. Pogorelko, S. A. Morrow, K. Lukashin, W. J. Briscoe, E. Pasyuk, L. C. Smith, V. Sapunenko, Dinko Pocanic, S. A. Dytman, B. S. Ishkhanov, Barry Ritchie, J. Kuhn, Hall Crannell, Marco Ripani, S. E. Kuhn, E. Anciant, Roy Thompson, C. Marchand, M. Bellis, J. Shaw, M. R. Niroula, Michael Wood, J. P. Cummings, K. Hafidi, V. S. Serov, L. Elouadrhiri, C. Tur, B. P. Quinn, R. A. Schumacher, G. V. O'Rielly, R. Fatemi, B. Zhao, Kei Moriya, Federico Ronchetti, C. A. Meyer, Victor Mokeev, Z. W. Zhao, J. Hu, M. Khandaker, G. V. Fedotov, M. Kossov, L. Guo, M. Ungaro, B. L. Berman, D. G. Jenkins, Cynthia Marie Hadjidakis, S. Bültmann, T. A. Forest, A. V. Vlassov, I. Popa, I. I. Strakovsky, J. Langheinrich, S. S. Stepanyan, S. A. Philips, A. Coleman, S. Stepanyan, P. Eugenio, B. B. Niczyporuk, H. R. Weller, N. Baillie, M. Battaglieri, R. A. Miskimen, B. McKinnon, P. Dragovitsch, D. P. Weygand, M. Taiuti, J. Pierce, Avraham Klein, Shifeng Chen, Michael Dugger, Kwangsoo Kim, G. Riccardi, N. Pivnyuk, L. M. Qin, J. Napolitano, H. O. Funsten, R. Bradford, J. Yun, D. Cords, Friedrich Klein, M. Osipenko, F. W. Hersman, G. E. Dodge, S. McAleer, F. X. Girod, A. Yegneswaran, C. Butuceanu, R. J. Feuerbach, A. Deur, H. Denizli, Brian Raue, D. Branford, P. V. Degtyarenko, R. De Vita, N. Guler, P. Collins, Marco A. Huertas, M. Mirazita, J. M. Laget, P. L. Cole, M. Guidal, W. K. Brooks, K. Beard, J. Hardie, G. Niculescu, A. V. Skabelin, I. Niculescu, Giovanni Ricco, Atilla Gonenc, M. D. Mestayer, J. J. Manak, H. G. Juengst, P. Coltharp, D. Lawrence, M. Holtrop, J. W. Price, C. Paterson, R. De Masi, E. L. Isupov, P. Nadel-Turonski, M. M. Ito, C. Djalali, R. W. Gothe, Tsutomu Mibe, A.V. Stavinsky, M. Klusman, Michael L. Williams, E. De Sanctis, M. MacCormick, J. T. Goetz, J. Lachniet, D. I. Sober, G. Audit, C. E. Hyde-Wright, E. Polli, M. Guillo, J. D. Kellie, Valeria Muccifora, D. J. Tedeschi, K. Y. Kim, G. Gavalian, S. Tkachenko, V. Batourine, S. Boiarinov, B. M. Preedom, H. Y. Lu, Sergey Kuleshov, I. Bedlinskiy, M. Bektasoglu, N. Benmouna, M. Nozar, Gerard Gilfoyle, E. Wolin, B. Carnahan, Elton Smith, P. Ambrozewicz, D. Sokhan, A. Tkabladze, Nikolay Shvedunov, D. Rowntree, Lorenzo Zana, J. P. Santoro, W. Kim, J. P. Ball, Y. Prok, U. Thoma, R. S. Hakobyan, M. Anghinolfi, D. S. Carman, Sylvain Bouchigny, L. El Fassi, N. Natasha, N. Kalantarians, James Mueller, S. Niccolai, D. G. Crabb, J. Salamanca, Susan Taylor, P. Rossi, J. W C McNabb, D. P. Watts, H. Egiyan, P. D. Rubin, Y. G. Sharabian, V. Crede, J. R. Calarco, B. E. Stokes, G. S. Adams, H. S. Jo, K. Joo, N. A. Baltzell, K. A. Griffioen, N. Markov, Laird Kramer, Y. Ilieva, S. Strauch, G. S. Mutchler, A. I. Ostrovidov, A. C S Lima, D. G. Ireland, Volker D. Burkert, A. S. Biselli, Nicola Bianchi, L. Todor, D. Protopopescu, S. Pozdniakov, M. Garçon, G. Rosner, R. Nasseripour, A. Shafi, K. S. Egiyan, K. Livingston, R. Dickson, K. Mikhailov, S. Barrow, P. Stoler, K. Hicks, J. Donnelly, G. Asryan, O. P. Dzyubak, R. A. Niyazov, M. J. Amaryan, I. Hleiqawi, S. L. Careccia, S. Simionatto, P. Corvisiero, K. L. Giovanetti, B. Asavapibhop, M. Spraker, Larry Weinstein, D. Doughty, D. Heddle, H. Hakobyan, Gerald Feldman, K. Wang, C. Salgado, and Michael Vineyard
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Photon, 010308 nuclear & particles physics, Bremsstrahlung, Hyperon, Observable, Lambda, Polarization (waves), 01 natural sciences, Induced polarization, Nuclear physics, Recoil, 0103 physical sciences, Nuclear Experiment, 010306 general physics
Abstract: Spin transfer from circularly polarized real photons to recoiling hyperons has been measured for the reactions $$\vec\gamma + p \to K^+ + \vec\Lambda$$ and $$\vec\gamma + p \to K^+ + \vec\Sigma^0$$. The data were obtained using the CLAS detector at Jefferson Lab for center-of-mass energies $W$ between 1.6 and 2.53 GeV, and for $$-0.85
Published: 2007

13. Quark-hadron duality in spin structure functionsg1pandg1d

Author: Carlos A. Salgado, M. Amarian, Nikolay Shvedunov, S. Bültmann, M. Guidal, L. Morand, T. A. Forest, P. Dragovitsch, J. Pierce, Avraham Klein, Elton Smith, Gerard Gilfoyle, S. Niccolai, M. Holtrop, K. Livingston, G. E. Dodge, E. Wolin, Hall Crannell, Michael Vineyard, P. V. Degtyarenko, M. Anghinolfi, Hong Lu, J. Hardie, I. Niculescu, James Mueller, B. M. Preedom, D. Lawrence, P. D. Rubin, Y. G. Sharabian, P. Eugenio, R. De Masi, Lorenzo Zana, J. P. Santoro, V. Batourine, H. G. Juengst, J. Langheinrich, S. S. Stepanyan, S. A. Philips, R. Fatemi, B. Carnahan, F. Sabatié, H. S. Jo, D. Doughty, A. V. Vlassov, M. Taiuti, J. P. Ball, Y. Prok, A.V. Stavinsky, L. Elouadrhiri, N. Guler, P. Nadel-Turonski, Tsutomu Mibe, V. Gyurjyan, Federico Ronchetti, R. J. Feuerbach, V. Sapunenko, V. Crede, D. J. Tedeschi, J. P. Cummings, P. Stoler, Dinko Pocanic, D. Heddle, Daniel S. Carman, J. Zhang, B. E. Stokes, D. G. Crabb, S. E. Kuhn, C. E. Hyde-Wright, G. Ricco, J. R. Calarco, H. Denizli, G. Gavalian, N. Baillie, H. Bagdasaryan, J. W. Price, G. V. O'Rielly, I. Bedlinskiy, S. Tkachenko, M. Kossov, C. Tur, Ji Li, S. Barrow, A. Deur, K. Hicks, R. A. Miskimen, B. McKinnon, G. S. Adams, Jeffrey P. Donnelly, N. Benmouna, M. Ripani, Shifeng Chen, M. D. Mestayer, R. DeVita, Sergey Kuleshov, M. Bektasoglu, M. Nozar, E. L. Isupov, Cynthia Marie Hadjidakis, Michael L. Williams, L. M. Qin, J. W C McNabb, K. S. Egiyan, D. Branford, Friedrich Klein, Michael Dugger, P. L. Cole, S. Boiarinov, W. K. Brooks, J. Lachniet, Z. W. Zhao, A. Tkabladze, A. V. Skabelin, Brian Raue, H. O. Funsten, C. Paterson, J. T. Goetz, E. Polli, S. Stepanyan, P. Collins, M. Mirazita, S. A. Morrow, J. M. Laget, Victor Mokeev, J. J. Manak, D. Rowntree, M. Klusman, L. Todor, C. Djalali, K. Mikhailov, Marco A. Huertas, L. Guo, M. Ungaro, D. G. Jenkins, R. S. Hakobyan, Susan Taylor, E. Golovatch, Sylvain Bouchigny, D. Protopopescu, S. Pozdniakov, M. Garçon, C. D. Keith, Kwangsoo Kim, G. Riccardi, H. Egiyan, P. Rossi, P. Ambrozewicz, R. C. Minehart, C. Butuceanu, K. Joo, J. Yun, D. Cords, M. MacCormick, U. Thoma, G. Asryan, I. Hleiqawi, C. A. Meyer, A. Yegneswaran, O. P. Dzyubak, R. A. Niyazov, G. V. Fedotov, M. Bellis, S. L. Careccia, P. Corvisiero, E. De Sanctis, J. Kuhn, Roy Thompson, K. L. Giovanetti, D. I. Sober, M. Guillo, Larry Weinstein, B. B. Niczyporuk, S. McAleer, N. Pivnyuk, J. Napolitano, M. Khandaker, Y. Ilieva, F. X. Girod, D. P. Weygand, Atilla Gonenc, G. Rosner, P. Bosted, R. Nasseripour, P. Coltharp, M. M. Ito, L. C. Smith, B. S. Ishkhanov, A. Cazes, Maryam Moteabbed, Bernhard Mecking, M. R. Niroula, K. V. Dharmawardane, M. Osipenko, K. Beard, W. Kim, M. Battaglieri, G. Niculescu, R. Bradford, K. Lukashin, L. C. Dennis, Laird Kramer, B. E. Bonner, H. Avakian, E. Pasyuk, S. A. Dytman, N. Markov, K. Park, A. I. Ostrovidov, A. C S Lima, D. G. Ireland, Volker D. Burkert, A. S. Biselli, V. P. Kubarovsky, O. Pogorelko, J. Shaw, Michael Wood, K. Hafidi, V. S. Serov, S. Strauch, R. Suleiman, G. S. Mutchler, N. A. Baltzell, K. A. Griffioen, J. D. Kellie, R. W. Gothe, K. Y. Kim, B. Zhao, F. W. Hersman, and R. A. Schumacher
Subjects: Physics, Quantum chromodynamics, Quark, Nuclear and High Energy Physics, Particle physics, Proton, 010308 nuclear & particles physics, Hadron, Duality (optimization), 01 natural sciences, Resonance (particle physics), Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Nucleon, Spin-½
Abstract: New measurements of the spin structure functions of the proton and deuteron g1p(x,Q2) and g1d(x,Q2) in the nucleon resonance region are compared with extrapolations of target-mass-corrected next-to-leading-order (NLO) QCD fits to higher energy data. Averaged over the entire resonance region (W 1.7 GeV2. This global duality appears to result from cancellations among the prominent local resonance regions: in particular strong sigma{3/2} contributions in the Delta(1232) region appear to be compensated by strong sigma{1/2} contributions in the resonance region centered on 1.5 GeV. These results are encouraging for the extension of NLO QCD fits to lower W and Q2 than have been used previously.
Published: 2007

14. Measurement of theN→Δ+(1232)Transition at High-Momentum Transfer byπ0Electroproduction

Author: L. C. Smith, B. Zhao, B. S. Ishkhanov, G. E. Dodge, P. V. Degtyarenko, V. Gyurjyan, I. Niculescu, D. Lawrence, M. Battaglieri, M. R. Niroula, J. Zhang, R. Fatemi, H. Bagdasaryan, A. V. Vlassov, L. Todor, T. Lee, F. W. Hersman, C. Marchand, V. Sapunenko, D. Protopopescu, R. A. Schumacher, I. Bedliski, Dinko Pocanic, B. M. Preedom, Inna Aznauryan, S. Pozdniakov, M. Garçon, Michael Wood, C. I O Gordon, S. Bültmann, L. Morand, Avraham Klein, R. Bradford, M. Khandaker, V. S. Serov, J. Lachniet, A. Tkabladze, B. L. Berman, Lorenzo Zana, J. P. Santoro, B. E. Stokes, Alexei V. Klimenko, E. Wolin, J. P. Cummings, S. Strauch, H. Egiyan, S. E. Kuhn, L. M. Qin, J. R. Calarco, G. S. Adams, M. Guidal, K. Park, H. S. Jo, Gerald Feldman, Y. Ilieva, R. A. Miskimen, B. McKinnon, V. P. Kubarovsky, Barry Ritchie, C. Salgado, M. Kossov, G. V. O'Rielly, S. A. Morrow, J. Kuhn, O. Pogorelko, C. Djalali, C. Tur, Baile Zhang, D. Doughty, L. C. Dennis, W. Kim, Rakhsha Nasseripour, N. Markov, B. E. Bonner, D. Branford, J. P. Ball, Y. Prok, H. Avakian, M. Holtrop, G. Niculescu, M. Bellis, Shifeng Chen, Ji Li, M. Mirazita, Latifa Elouadrhiri, J. M. Laget, R. C. Minehart, R. S. Hakobyan, N. A. Baltzell, C. A. Meyer, M. Guillo, E. De Sanctis, V. Batourine, K. Livingston, D. G. Jenkins, M. D. Mestayer, G. V. Fedotov, D. I. Sober, Sylvain Bouchigny, F. Sabatié, P. Ambrozewicz, S. Stepanyan, Michael L. Williams, K. A. Griffioen, Laird Kramer, P. Rossi, D. G. Crabb, N. Guler, S. Boiarinov, W. J. Briscoe, J. T. Goetz, E. Polli, Elton Smith, P. Eugenio, M. Taiuti, E. Pasyuk, D. P. Weygand, P. L. Cole, S. Barrow, S. McAleer, J. Langheinrich, S. S. Stepanyan, M. Anghinolfi, S. A. Philips, James Mueller, H. Denizli, F. X. Girod, U. Thoma, S. A. Dytman, J. D. Kellie, P. D. Rubin, P. Coltharp, Y. G. Sharabian, S. Mehrabyan, A. Cazes, Bernhard Mecking, D. Heddle, A. I. Ostrovidov, K. V. Dharmawardane, I. I. Strakovsky, I. Hleiqawi, G. Rosner, M. M. Ito, J. J. Melone, G. Riccardi, A. Deur, A. V. Skabelin, D. G. Ireland, R. DeVita, J. W C McNabb, S. L. Careccia, Michael Vineyard, Volker D. Burkert, W. K. Brooks, C. Butuceanu, J. W. Price, G. S. Mutchler, B. B. Niczyporuk, K. L. Giovanetti, M. Osipenko, N. Pivnyuk, J. Napolitano, Larry Weinstein, Gerard Gilfoyle, Daniel S. Carman, G. Audit, C. E. Hyde-Wright, M. Bektasoglu, M. Nozar, Victor Mokeev, A. S. Biselli, R. W. Gothe, G. Ricco, M. Amarian, P. Stoler, Friedrich Klein, K. Hicks, Brian Raue, K. S. Egiyan, Cynthia Marie Hadjidakis, Michael Dugger, H. O. Funsten, K. Mikhailov, J. Donnelly, G. Asryan, O. P. Dzyubak, R. A. Niyazov, Federico Ronchetti, P. Corvisiero, G. Gavalian, S. Tkachenko, N. Benmouna, M. Ripani, H. G. Juengst, A.V. Stavinsky, D. J. Tedeschi, S. Niccolai, J. Hardie, L. Guo, M. Ungaro, K. Joo, D. Cords, A. Yegneswaran, and R. J. Feuerbach
Subjects: Physics, Proton, 010308 nuclear & particles physics, Momentum transfer, Scalar (mathematics), Solid angle, General Physics and Astronomy, Resonance, 01 natural sciences, Helicity, Nuclear physics, Amplitude, 0103 physical sciences, Magnetic form factor, 010306 general physics
Abstract: We report a new measurement of the exclusive electroproduction reaction gamma*_p --> pi0_p to explore the evolution from soft nonperturbative physics to hard processes via the Q2 dependence of the magnetic (M1+), electric (E1+), and scalar (S1+) multipoles in the N --> Delta transition. 9000 differential cross section data points cover W from threshold to 1.4 GeV/c2, 4pi center-of-mass solid angle, and Q2 from 3 to 6 GeV2/c2, the highest yet achieved. It is found that the magnetic form factor G^*M decreases with Q2 more steeply than the proton magnetic form factor, the ratio E1+/M1+ is small and negative, indicating strong helicity nonconservation, and the ratio S1+/M1+ is negative, while its magnitude increases with Q2.
Published: 2006

15. Erratum:η′Photoproduction on the Proton for Photon Energies from 1.527 to 2.227 GeV [Phys. Rev. Lett.96, 062001 (2006)]

Author: Laird Kramer, Dinko Pocanic, G. S. Mutchler, S. E. Kuhn, G. Rosner, Stephen Taylor, Yordanka Ilieva, M. D. Mestayer, J. J. Manak, P. Eugenio, M. Osipenko, Shifeng Chen, M. Taiuti, S. Boiarinov, B. M. Preedom, M. Guidal, G. Niculescu, K. Beard, K. Livingston, K. S. Egiyan, M. Holtrop, R. A. Schumacher, Lorenzo Zana, Frank Klein, K. Mikhailov, M. Guillo, J. T. Goetz, J. Langheinrich, S. A. Philips, K. A. Griffioen, V. Batourine, D. G. Ireland, V. Crede, S. A. Morrow, P. Rubin, L. Elouadrhiri, A.V. Stavinsky, H. S. Jo, Gerald Feldman, J. R. Calarco, N. Guler, G. Gavalian, C. Djalali, G. Audit, C. E. Hyde-Wright, R. J. Feuerbach, M. Bektasoglu, J. Shaw, N. A. Baltzell, I. I. Strakovsky, B. Carnahan, F. Sabatié, K. Wang, B. E. Stokes, G. S. Adams, D. J. Tedeschi, V. Mokeev, J. P. Cummings, J. Hu, E. Wolin, P. Ambrozewicz, Michael Wood, A. Deur, J. Donnelly, G. Asryan, S. Barrow, O. P. Dzyubak, R. A. Niyazov, H. Juengst, V. S. Serov, R. A. Miskimen, B. McKinnon, I. Bedlinskiy, M. Anghinolfi, G. V. O'Rielly, J. P. Ball, Y. Prok, M. Kossov, Andreas Klein, K. V. Dharmawardane, M. Nozar, P. Corvisiero, James Mueller, Rakhsha Nasseripour, K. S. Dhuga, D. Branford, J. P. Santoro, M. Bellis, E. S. Smith, Marco A. Huertas, D. S. Carman, A. Coleman, H. R. Weller, Roy Thompson, D. Protopopescu, T. A. Forest, D. G. Jenkins, J. D. Kellie, Y. G. Sharabian, Cynthia Marie Hadjidakis, E. De Sanctis, M. Mirazita, J. M. Laget, M. Battaglieri, P. Collins, M. Spraker, V. Gyurjyan, A. I. Ostrovidov, P. Stoler, A. C S Lima, K. Park, L. C. Smith, S. Pozdniakov, M. Garçon, B. S. Ishkhanov, P. L. Cole, Michael Vineyard, A. Shafi, Mark Richard James Williams, S. Stepanyan, Sylvain Bouchigny, R. Bradford, B. A. Mecking, P. Rossi, R. DeVita, J. Zhang, V. P. Kubarovsky, D. G. Crabb, Michael Dugger, Volker D. Burkert, H. Egiyan, J. Pierce, J. W C McNabb, K. Hicks, W. Kim, Clarisse Tur, P. Nadel-Turonski, H. Bagdasaryan, J. W. Price, V. Sapunenko, Valeria Muccifora, A. Empl, O. Pogorelko, A. S. Biselli, P. Dragovitsch, D. I. Sober, S. McAleer, F. X. Girod, Tsutomu Mibe, B. L. Berman, H. O. Funsten, S. Niccolai, L. M. Qin, Gerard Gilfoyle, B. B. Niczyporuk, William Brooks, U. Thoma, L. C. Dennis, B. E. Bonner, P. Coltharp, N. Pivnyuk, K. Lukashin, J. Napolitano, Hall Crannell, H. Avakian, M. M. Ito, J. Hardie, S. Strauch, Jens H. Kuhn, C. Paterson, Nicola Bianchi, L. C. Maximon, C. Marchand, M. Klusman, J. Lachniet, A. Tkabladze, L. Guo, M. Ungaro, G. E. Dodge, D. Rowntree, P. V. Degtyarenko, K. Kim, S. Bültmann, W. J. Briscoe, E. Pasyuk, K. Joo, J. Yun, D. Cords, S. S. Stepanyan, N. Baillie, S. A. Dytman, R. S. Hakobyan, R. Fatemi, A. Yegneswaran, D. Lawrence, A. V. Vlassov, Kwangsoo Kim, G. Riccardi, C. Butuceanu, S. Tkachenko, N. Benmouna, T. Lee, M. Ripani, Carlos A. Salgado, G. Ricco, Brian Raue, Federico Ronchetti, R. C. Minehart, C. A. Meyer, G. V. Fedotov, D. P. Weygand, D. Doughty, H. Denizli, D. Heddle, A. V. Skabelin, Alexei V. Klimenko, Barry Ritchie, E. Anciant, M. Khandaker, I. Hleiqawi, S. L. Careccia, S. Simionatto, K. L. Giovanetti, B. Asavapibhop, Larry Weinstein, F. W. Hersman, and R. W. Gothe
Subjects: Physics, Nuclear physics, Meson production, Photon, Proton, General Physics and Astronomy
Published: 2006

16. Measurement of the deuteron structure functionF2in the resonance region and evaluation of its moments

Author: B. E. Stokes, G. S. Adams, Daniel S. Carman, J. P. Cummings, K. Joo, M. Guillo, G. Audit, C. E. Hyde-Wright, B. M. Preedom, M. Kossov, Susan Taylor, S. Strauch, C. Marchand, H. Egiyan, Silvano Simula, Lorenzo Zana, J. P. Santoro, P. Eugenio, K. Park, M. Taiuti, H. S. Jo, M. Nozar, G. V. O'Rielly, I. Hleiqawi, Alexei V. Klimenko, K. S. Egiyan, S. L. Careccia, J. R. Calarco, W. Kim, Y. Ilieva, K. L. Giovanetti, B. Asavapibhop, Larry Weinstein, M. Khandaker, K. Mikhailov, V. P. Kubarovsky, C. Salgado, Barry Ritchie, M. Battaglieri, D. Doughty, G. Niculescu, R. DeVita, J. W C McNabb, D. Heddle, R. J. Feuerbach, R. A. Schumacher, D. G. Jenkins, A. Empl, N. A. Baltzell, L. C. Smith, B. S. Ishkhanov, E. Wolin, O. Pogorelko, Shifeng Chen, H. G. Juengst, R. Bradford, K. Lukashin, J. J. Melone, E. Golovatch, S. McAleer, K. A. Griffioen, S. A. Morrow, M. Guidal, H. Denizli, C. Djalali, F. X. Girod, J. P. Ball, Y. Prok, A.V. Stavinsky, Ji Li, L. M. Qin, A. V. Skabelin, Marco A. Huertas, Federico Ronchetti, J. Donnelly, G. Rosner, R. Nasseripour, J. D. Kellie, D. G. Crabb, J. T. Goetz, E. Polli, U. Thoma, C. I O Gordon, M. Holtrop, G. Asryan, L. Todor, D. J. Tedeschi, D. Protopopescu, M. D. Mestayer, G. Gavalian, R. C. Minehart, P. Ambrozewicz, L. Elouadrhiri, S. Pozdniakov, M. Garçon, O. P. Dzyubak, A. Cazes, V. Sapunenko, Dinko Pocanic, Sylvain Bouchigny, C. A. Meyer, N. Benmouna, M. Ripani, J. Shaw, G. V. Fedotov, Michael L. Williams, Bernhard Mecking, J. Kuhn, K. V. Dharmawardane, J. W. Price, M. Osipenko, I. Bedlinskiy, M. Klusman, P. Rossi, P. Corvisiero, S. E. Kuhn, S. Boiarinov, S. Bültmann, A. Tkabladze, Michael Wood, D. P. Weygand, A. Deur, Roy Thompson, K. Beard, R. Suleiman, G. Ricco, C. Tur, L. Morand, T. A. Forest, P. Coltharp, V. S. Serov, L. C. Dennis, B. E. Bonner, W. K. Brooks, Cynthia Marie Hadjidakis, G. S. Mutchler, S. Stepanyan, H. Avakian, Michael Dugger, H. O. Funsten, K. Livingston, M. M. Ito, Michael Vineyard, P. Stoler, J. Pierce, Avraham Klein, J. Langheinrich, S. S. Stepanyan, S. A. Philips, B. B. Niczyporuk, Elton Smith, M. Anghinolfi, N. Pivnyuk, J. Napolitano, V. Batourine, S. Mehrabyan, James Mueller, F. Sabatié, P. D. Rubin, E. Pasyuk, P. Dragovitsch, N. Guler, G. Nefedov, K. Hicks, S. A. Dytman, M. Bellis, S. Niccolai, Y. G. Sharabian, G. E. Dodge, J. Hardie, Friedrich Klein, S. Barrow, Brian Raue, P. V. Degtyarenko, Kwangsoo Kim, G. Riccardi, J. Hu, A. Coleman, F. W. Hersman, I. Niculescu, D. Lawrence, C. Butuceanu, Gerard Gilfoyle, R. W. Gothe, R. A. Miskimen, K. Y. Kim, B. McKinnon, D. Branford, M. Mirazita, J. M. Laget, Laird Kramer, N. Baillie, E. De Sanctis, D. I. Sober, R. Fatemi, A. V. Vlassov, T. Lee, J. J. Manak, A. I. Ostrovidov, A. C S Lima, D. G. Ireland, Volker D. Burkert, A. S. Biselli, M. Bektasoglu, J. Lachniet, D. Rowntree, R. S. Hakobyan, P. Nadel-Turonski, P. L. Cole, L. Guo, M. Ungaro, R. A. Niyazov, J. Yun, D. Cords, A. Yegneswaran, V. Gyurjyan, J. Zhang, H. Bagdasaryan, and Victor Mokeev
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Proton, 010308 nuclear & particles physics, Scattering, Hadron, Resonance, 01 natural sciences, Nuclear physics, Cover (topology), 0103 physical sciences, Invariant mass, Operator product expansion, Twist, 010306 general physics
Abstract: Inclusive electron scattering off the deuteron has been measured to extract the deuteron structure function F{sub 2} with the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility. The measurement covers the entire resonance region from the quasielastic peak up to the invariant mass of the final-state hadronic system W{approx_equal}2.7 GeV with four-momentum transfers Q{sup 2} from 0.4 to 6 (GeV/c){sup 2}. These data are complementary to previous measurements of the proton structure function F{sub 2} and cover a similar two-dimensional region of Q{sup 2} and Bjorken variable x. Determination of the deuteron F{sub 2} over a large x interval including the quasielastic peak as a function of Q{sup 2}, together with the other world data, permit a direct evaluation of the structure function moments for the first time. By fitting the Q{sup 2} evolution of these moments with an OPE-based twist expansion we have obtained a separation of the leading twist and higher twist terms. The observed Q{sup 2} behavior of the higher twist contribution suggests a partial cancelation of different higher twists entering into the expansion with opposite signs. This cancelation, found also in the proton moments, is a manifestation of the 'duality' phenomenon inmore » the F{sub 2} structure function.« less
Published: 2006

17. Differential cross sections forγ+p→K++Yfor Λ andΣ0hyperons

Author: R. Bradford, R. A. Schumacher, J. W. C. McNabb, L. Todor, G. Adams, P. Ambrozewicz, E. Anciant, M. Anghinolfi, B. Asavapibhop, G. Asryan, G. Audit, H. Avakian, H. Bagdasaryan, N. Baillie, J. P. Ball, N. A. Baltzell, S. Barrow, V. Batourine, M. Battaglieri, K. Beard, I. Bedlinskiy, M. Bektasoglu, M. Bellis, N. Benmouna, B. L. Berman, N. Bianchi, A. S. Biselli, B. E. Bonner, S. Bouchigny, S. Boiarinov, D. Branford, W. J. Briscoe, W. K. Brooks, S. Bültmann, V. D. Burkert, C. Butuceanu, J. R. Calarco, S. L. Careccia, D. S. Carman, B. Carnahan, S. Chen, P. L. Cole, A. Coleman, P. Coltharp, P. Corvisiero, D. Crabb, H. Crannell, J. P. Cummings, R. DeVita, E. De Sanctis, P. V. Degtyarenko, H. Denizli, L. Dennis, A. Deur, K. V. Dharmawardane, K. S. Dhuga, C. Djalali, G. E. Dodge, J. Donnelly, D. Doughty, P. Dragovitsch, M. Dugger, S. Dytman, O. P. Dzyubak, H. Egiyan, K. S. Egiyan, L. Elouadrhiri, A. Empl, P. Eugenio, R. Fatemi, G. Fedotov, G. Feldman, R. J. Feuerbach, T. A. Forest, H. Funsten, M. Garçon, G. Gavalian, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, J. T. Goetz, E. Golovatch, A. Gonenc, 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, M. Huertas, 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, K. Y. Kim, K. Kim, W. Kim, A. Klein, F. J. Klein, A. V. Klimenko, M. Klusman, M. Kossov, L. H. Kramer, V. Kubarovsky, J. Kuhn, S. E. Kuhn, S. V. Kuleshov, J. Lachniet, J. M. Laget, J. Langheinrich, D. Lawrence, A. C. S. Lima, K. Livingston, K. Lukashin, J. J. Manak, C. Marchand, S. McAleer, B. McKinnon, B. A. Mecking, M. D. Mestayer, C. A. Meyer, T. Mibe, K. Mikhailov, R. Minehart, M. Mirazita, R. Miskimen, V. Mokeev, S. A. Morrow, V. Muccifora, J. Mueller, G. S. Mutchler, P. Nadel-Turonski, J. Napolitano, R. Nasseripour, 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, C. Paterson, S. A. Philips, J. Pierce, N. Pivnyuk, D. Pocanic, O. Pogorelko, E. Polli, I. Popa, S. Pozdniakov, B. M. Preedom, J. W. Price, Y. Prok, D. Protopopescu, L. M. Qin, B. P. Quinn, 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, C. Salgado, J. P. Santoro, V. Sapunenko, 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. S. Stepanyan, S. Stepanyan, B. E. Stokes, P. Stoler, I. I. Strakovsky, S. Strauch, R. Suleiman, M. Taiuti, S. Taylor, D. J. Tedeschi, U. Thoma, R. Thompson, A. Tkabladze, S. Tkachenko, 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, L. Zana, J. Zhang, and B. Zhao
Subjects: Physics, Nuclear and High Energy Physics, Angular distribution, Effective lagrangian, Hyperon, Theoretical models, Sigma, Atomic physics, Lambda, Scaling, Resonance (particle physics)
Abstract: High-statistics cross sections for the reactions {gamma} + p {yields} K{sup +} + {Lambda} and {gamma} + p {yields} K{sup +} + {Sigma}{sup 0} have been measured using CLAS at Jefferson Lab for center-of-mass energies W between 1.6 and 2.53 GeV, and for -0.85 < cos {theta}{sub K{sup +}}{sup c.m.} < +0.95. In the K{sup +}{Lambda} channel we confirm a resonance-like structure near W=1.9 GeV at backward kaon angles. The position and width of this structure change with angle, indicating that more than one resonance is likely playing a role. The K{sup +} {Lambda} channel at forward angles and all energies is well described by a t-channel scaling characteristic of Regge exchange, while the same scaling applied to the K{sup +} {Sigma}{sup 0} channel is less successful. Several existing theoretical models are compared to the data, but none provide a good representation of the results.
Published: 2006

18. Singleπ+electroproduction on the proton in the first and second resonance regions at0.25GeV2<Q2<0.65GeV2

Author: J. Kuhn, Shifeng Chen, R. J. Feuerbach, Roy Thompson, R. W. Gothe, K. Y. Kim, C. Cetina, Y. Kuang, V. Gyurjyan, J. Zhang, E. Anciant, Michael Vineyard, M. Guidal, G. E. Dodge, H. Bagdasaryan, E. Polli, F. W. Hersman, G. Gavalian, K. S. Egiyan, G. Niculescu, Daijin Kim, Min Suk Kim, S. Stepanyan, P. V. Degtyarenko, L. M. Qin, Sylvain Bouchigny, N. Benmouna, M. Ripani, M. Khandaker, K. A. Griffioen, G. Ricco, K. Mikhailov, P. Rossi, M. Holtrop, H. Denizli, Elton Smith, P. Eugenio, M. Taiuti, Philip L. Cole, Ji Li, F. Ronchetti, K. Livingston, E. DeSanctis, G. V. O'Rielly, M. Klusman, M. Anghinolfi, James Mueller, I. Niculescu, Moshe Gai, A. V. Skabelin, E. Wolin, I. G. Aznauryan, I. Hleiqawi, P. D. Rubin, Y. G. Sharabian, J. P. Cummings, D. G. Jenkins, Friedrich Klein, Victor Mokeev, D. Lawrence, S. L. Careccia, S. Simionatto, M. D. Mestayer, Alexei V. Klimenko, K. Sabourov, M. Osipenko, J. Langheinrich, R. DeVita, J. D. Kellie, J. W C McNabb, R. S. Hicks, Brian Raue, J. Lachniet, P. Stoler, J. R. Calarco, L. C. Smith, S. J. Gaff, B. S. Ishkhanov, S. A. Philips, Barry Ritchie, K. Beard, P. Dragovitsch, Dinko Pocanic, M. Kossov, G. T. Goetz, D. Rowntree, Rakhsha Nasseripour, S. McAleer, S. O. Nelson, K. L. Giovanetti, B. Asavapibhop, M. Spraker, Larry Weinstein, L. Guo, M. Ungaro, J. J. Melone, Bernhard Mecking, K. Hicks, S. E. Kuhn, B. Carnahan, F. Sabatié, Latifa Elouadrhiri, W. Kim, K. V. Dharmawardane, D. Doughty, D. Heddle, J. P. Ball, Y. Prok, R. C. Minehart, Cynthia Marie Hadjidakis, C. A. Meyer, B. B. Niczyporuk, J. H. Kelley, S. Niccolai, G. V. Fedotov, C. Tur, Shalev Gilad, Thierry Auger, Michael Dugger, N. Guler, S. Boiarinov, B. M. Preedom, A. Tkabladze, R. S. Hakobyan, O. P. Dzyubak, Daniel S. Carman, Susan Taylor, S. Strauch, G. A. Peterson, H. O. Funsten, M. Eckhause, D. P. Weygand, J. W. Price, J. Hardie, N. Pivnyuk, J. Napolitano, A. Longhi, G. Audit, K. Joo, C. E. Hyde-Wright, R. A. Niyazov, J. Yun, D. Cords, H. Egiyan, A. Yegneswaran, J. P. Santoro, P. Corvisiero, M. Sargsyan, A.V. Stavinsky, N. Baltzel, Hall Crannell, S. A. Morrow, S. Barrow, L. C. Dennis, B. E. Bonner, C. S. Whisnant, C. Djalali, D. J. Tedeschi, C. Marchand, Gerald Feldman, R. A. Schumacher, H. Avakian, J. Hu, M. Nozar, A. Coleman, L. Todor, M. Battaglieri, H. R. Weller, P. Ambrozewicz, K. Wang, C. Salgado, D. Protopopescu, S. Pozdniakov, C. I O Gordon, R. Bradford, K. Lukashin, D. G. Crabb, G. S. Mutchler, Z. L. Zhou, G. Rosner, J. Donnely, A. Shafi, L. Morand, T. A. Forest, W. J. Briscoe, E. Pasyuk, Avraham Klein, S. A. Dytman, G. S. Adams, Y. Ilieva, M. Bellis, K. Park, M. M. Ito, R. Fatemi, A. V. Vlassov, V. P. Kubarovsky, A. Empl, O. Pogorelko, J. J. Manak, Patrick Girard, J. Shaw, Michael Wood, V. S. Serov, Nicola Bianchi, D. I. Sober, L. Y. Murphy, S. Mehrabyan, Kwangsoo Kim, G. Riccardi, C. Butuceanu, Laird Kramer, M. Bektasoglu, D. G. Ireland, Volker D. Burkert, Jing Zhao, A. S. Biselli, R. A. Miskimen, B. McKinnon, H. G. Juengst, D. Branford, M. Mirazita, J. M. Laget, V. Sapunenko, Valeria Muccifora, Gerard Gilfoyle, U. Thoma, M. Guillo, I. I. Strakovsky, and W. K. Brooks
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Proton, 010308 nuclear & particles physics, Hadron, Resonance, Sigma, 01 natural sciences, 7. Clean energy, Helicity, Particle identification, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Neutron, Nuclear Experiment, 010306 general physics, Nucleon
Abstract: The ep {yields} e'pi{sup +}n reaction was studied in the first and second nucleon resonance regions in the 0.25 GeV{sup 2} < Q{sup 2} < 0.65 GeV{sup 2} range using the CLAS detector at Thomas Jefferson National Accelerator Facility. For the first time the absolute cross sections were measured covering nearly the full angular range in the hadronic center-of-mass frame. The structure functions {sigma}{sub TL}, {sigma}{sub TT} and the linear combination {sigma}{sub T} + {epsilon}{sigma}{sub L} were extracted by fitting the {phi}-dependence of the measured cross sections, and were compared to the MAID and Sato-Lee models.
Published: 2006

19. 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

20. 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

21. 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

22. 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

23. 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

24. 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

25. 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

26. 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

27. 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

28. 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

29. 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

30. 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

31. 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

32. 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

33. 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

34. Erratum: First Measurement of the Double Spin Asymmetry ine→p→→e′π+nin the Resonance Region [Phys. Rev. Lett. 88, 082001 (2002)]

Author: R. De Vita, M. Anghinolfi, V. D. Burkert, G. E. Dodge, R. Minehart, M. Taiuti, H. Weller, G. Adams, M. J. Amaryan, E. Anciant, D. S. Armstrong, B. Asavapibhop, G. Asryan, G. Audit, T. Auger, H. Avakian, H. Bagdasaryan, J. P. Ball, S. Barrow, M. Battaglieri, K. Beard, M. Bektasoglu, N. Bianchi, A. S. Biselli, S. Boiarinov, B. E. Bonner, P. Bosted, S. Bouchigny, D. Branford, W. K. Brooks, S. Bueltmann, J. R. Calarco, G. P. Capitani, D. S. Carman, B. Carnahan, A. Cazes, L. Ciciani, P. L. Cole, A. Coleman, J. Connelly, D. Cords, P. Corvisiero, D. Crabb, H. Crannell, J. P. Cummings, E. De Sanctis, P. V. Degtyarenko, R. Demirchyan, H. Denizli, L. Dennis, K. V. Dharmawardane, K. S. Dhuga, C. Djalali, D. Doughty, P. Dragovitsch, M. Dugger, S. Dytman, M. Eckhause, H. Egiyan, K. S. Egiyan, L. Elouadrhiri, A. Empl, L. Farhi, R. Fatemi, R. J. Feuerbach, J. Ficenec, T. A. Forest, V. Frolov, H. Funsten, S. J. Gaff, M. Gai, M. Garçon, G. Gavalian, S. Gilad, G. P. Gilfoyle, K. L. Giovanetti, P. Girard, E. Golovatch, K. Griffioen, M. Guidal, M. Guillo, V. Gyurjyan, C. Hadjidakis, D. Hancock, J. Hardie, D. Heddle, P. Heimberg, F. W. Hersman, K. Hicks, R. S. Hicks, M. Holtrop, J. Hu, C. E. Hyde-Wright, B. S. Ishkanov, 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, M. Klusman, M. Kossov, L. H. Kramer, Y. Kuang, J. Kuhn, S. E. Kuhn, J. Lachniet, J. M. Laget, D. Lawrence, Ji Li, K. Livingston, A. Longhi, K. Loukachine, M. Lucas, W. Major, J. J. Manak, C. Marchand, S. McAleer, J. McCarthy, J. W. C. McNabb, B. A. Mecking, M. D. Mestayer, C. A. Meyer, K. Mikhailov, M. Mirazita, R. Miskimen, V. Mokeev, V. Muccifora, J. Mueller, G. S. Mutchler, J. Napolitano, S. O. Nelson, G. Niculescu, I. Niculescu, B. B. Niczyporuk, R. A. Niyazov, A. K. Opper, 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, A. R. Reolon, G. Riccardi, G. Ricco, M. Ripani, B. G. Ritchie, S. Rock, F. Ronchetti, P. Rossi, D. Rowntree, P. D. Rubin, F. Sabatié, K. Sabourov, C. Salgado, V. Sapunenko, M. Sargsyan, R. A. Schumacher, V. S. Serov, A. Shafi, Y. G. Sharabian, J. Shaw, A. V. Skabelin, E. S. Smith, T. Smith, L. C. Smith, D. I. Sober, L. Sorrell, M. Spraker, A. Stavinsky, S. Stepanyan, P. Stoler, I. I. Strakovsky, S. Taylor, D. J. Tedeschi, R. Thompson, L. Todor, M. Ungaro, M. F. Vineyard, A. V. Vlassov, K. Wang, L. B. Weinstein, A. Weisberg, D. P. Weygand, C. S. Whisnant, E. Wolin, A. Yegneswaran, J. Yun, B. Zhang, J. Zhao, and Z. Zhou
Subjects: Physics, media_common.quotation_subject, Pi, General Physics and Astronomy, Resonance, Angular dependence, Atomic physics, Spin (physics), Asymmetry, Helicity, media_common
Published: 2002

35. Q2Dependence of Quadrupole Strength in theγ*p→Δ+(1232)→pπ0Transition

Author: C. Marchand, T. Y. Tung, M. Witkowski, Bernhard Mecking, C. E. Hyde-Wright, K. V. Dharmawardane, M. J. Amaryan, S. Stepanyan, J. Ficenec, Jochen Heisenberg, G. A. Peterson, S. Barrow, K. Y. Kim, S. A. Philips, Jing Zhao, P. Rossi, Patrick Girard, J. Shaw, Nicola Bianchi, G. E. Dodge, G. S. Adams, P. V. Degtyarenko, K. L. Giovanetti, B. Asavapibhop, J. P. Cummings, L. C. Dennis, B. E. Bonner, R. A. Niyazov, M. Guidal, S. McAleer, H. Avakian, G. Niculescu, W. Kim, K. Loukachine, K. Joo, K. A. Griffioen, J. R. Calarco, P. Corvisiero, Z. L. Zhou, Larry Weinstein, R. De Vita, Michael Vineyard, M. Holtrop, Thomas E. Smith, D. Lawrence, Roy Thompson, A. Longhi, R. A. Demirchyan, M. Battaglieri, F. W. Hersman, K. S. Egiyan, William Bertozzi, E. Anciant, M. Kossov, L. Farhi, V. Sapunenko, H. Egiyan, R. A. Schumacher, M. S. Ohandjanyan, D. P. Weygand, Valeria Muccifora, Daniel S. Carman, S. A. Dytman, A. K. Opper, M. Khandaker, M. D. Mestayer, A. Coleman, V. B. Gavrilov, G. Audit, Y. Patois, H. R. Weller, G. Riccardi, Gerard Gilfoyle, J. W C McNabb, M. Taiuti, H. Funsten, M. Klusman, K. Beard, S. Boiarinov, Federico Ronchetti, J. W. Price, D. Doughty, Airton Deppman, S. Whisnant, B. M. Preedom, D. J. Tedeschi, R. A. Miskimen, L. C. Smith, A. V. Skabelin, D. Heddle, P. Stoler, T. A. Forest, R. J. Feuerbach, G. Ricco, G. S. Mutchler, Kalvir S. Dhuga, Kevin Fissum, B. B. Niczyporuk, M. Mirazita, J. M. Laget, O. Pogorelko, Philip L. Cole, B. Carnahan, K. Hicks, N. Pivnyuk, J. Napolitano, Avraham Klein, R. W. Major, Volker D. Burkert, M. Sanzone, A. S. Biselli, S. K. Matthews, G. P. Capitani, Moshe Gai, Shalev Gilad, Thierry Auger, C. Salgado, Friedrich Klein, Inna Aznauryan, C. Djalali, M. Lucas, A. R. Reolon, S. M. Shuvalov, R. S. Hicks, Brian Raue, M. Guillo, D. Rowntree, D. G. Jenkins, L. Elouadrhiri, Hall Crannell, Robert E. Welsh, P. Dragovitsch, M. M. Ito, W. K. Brooks, L. M. Qin, L. Todor, Y. V. Efremenko, S. Taylor, J. Hardie, M. Bektasoglu, A. V. Vlassov, J. J. Manak, E. De Sanctis, D. I. Sober, Barry Ritchie, E. Wolin, Y. Kuang, E. Polli, H. Denizli, Dinko Pocanic, M. Eckhause, M. Sargsyan, S. E. Kuhn, R. C. Minehart, D. G. Crabb, J. H. Kelley, C. A. Meyer, M. Spraker, Michael Dugger, Elton Smith, M. Anghinolfi, James Mueller, P. D. Rubin, Y. G. Sharabian, M. Ripani, V. Gyurjyan, H. Bagdasaryan, D. Hancock, D. S. Armstrong, J. Yun, D. Cords, and A. Yegneswaran
Subjects: Quark, Physics, Unitarity, 010308 nuclear & particles physics, Nuclear Theory, Scalar (mathematics), General Physics and Astronomy, 01 natural sciences, Nuclear physics, Baryon, Pion, 0103 physical sciences, Quadrupole, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Nucleon, Multipole expansion
Abstract: Models of baryon structure predict a small quadrupole deformation of the nucleon due to residual tensor forces between quarks or distortions from the pion cloud. Sensitivity to quark versus pion degrees of freedom occurs through the Q2 dependence of the magnetic (M1+), electric (E1+), and scalar (S1+) multipoles in the gamma*p-->Delta(+)-->p pi(0) transition. We report new experimental values for the ratios E(1+)/M(1+) and S(1+)/M(1+) over the range Q2 = 0.4-1.8 GeV2, extracted from precision p(e,e(')p)pi(0) data using a truncated multipole expansion. Results are best described by recent unitary models in which the pion cloud plays a dominant role.
Published: 2002

36. First Measurement of the Double Spin Asymmetry ine→p→→e′π+nin the Resonance Region

Author: Elton Smith, B. S. Ishkanov, E. Golovatch, M. Ungaro, V. Frolov, M. J. Amaryan, D. S. Armstrong, J. R. Calarco, S. A. Philips, J. Ficenec, L. Ciciani, R. A. Schumacher, Shalev Gilad, R. A. Demirchyan, L. C. Dennis, B. E. Bonner, M. Anghinolfi, James Mueller, T. A. Forest, S. Stepanyan, Avraham Klein, H. Avakian, A.V. Stavinsky, P. D. Rubin, Hall Crannell, Y. G. Sharabian, K. L. Giovanetti, B. Asavapibhop, L. Elouadrhiri, M. Osipenko, M. Klusman, G. E. Dodge, B. B. Niczyporuk, D. J. Tedeschi, K. Beard, Kalvir S. Dhuga, J. P. Cummings, Dinko Pocanic, R. C. Minehart, C. A. Meyer, M. Taiuti, N. Pivnyuk, J. Napolitano, R. J. Feuerbach, J. Lachniet, D. Rowntree, J. Yun, D. Cords, A. Yegneswaran, P. V. Degtyarenko, K. Kim, K. Loukachine, I. Niculescu, D. Lawrence, G. S. Adams, K. Joo, A. Cazes, Bernhard Mecking, M. Guidal, G. Niculescu, E. Pasyuk, C. Marchand, Larry Weinstein, S. A. Dytman, I. I. Strakovsky, G. Gavalian, J. S. McCarthy, K. V. Dharmawardane, R. De Vita, G. V. O'Rielly, G. Asryan, M. Holtrop, Thomas E. Smith, K. Park, M. Kossov, S. E. Kuhn, D. P. Weygand, E. Anciant, R. A. Niyazov, B. Carnahan, J. H. Kelley, D. G. Jenkins, M. Battaglieri, W. K. Brooks, A. K. Opper, A. Empl, O. Pogorelko, P. Dragovitsch, F. Sabatié, Daniel S. Carman, Sylvain Bouchigny, K. Sabourov, Federico Ronchetti, L. M. Qin, L. C. Smith, M. Khandaker, S. J. Gaff, G. Riccardi, J. W C McNabb, E. De Sanctis, P. Corvisiero, Victor Mokeev, C. E. Hyde-Wright, G. Audit, L. Sorrell, Thierry Auger, P. Rossi, Barry Ritchie, Baile Zhang, A. Weisberg, A. R. Reolon, D. Protopopescu, J. Hardie, M. Ripani, Michael Vineyard, Patrick Girard, J. Shaw, S. Pozdniakov, M. Garçon, D. Doughty, M. Bektasoglu, S. McAleer, V. Gyurjyan, C. Djalali, W. Kim, Cynthia Marie Hadjidakis, P. Stoler, H. Denizli, D. Heddle, M. Lucas, V. S. Serov, F. W. Hersman, W. Major, K. A. Griffioen, Y. Kuang, Michael Dugger, S. O. Nelson, Z. L. Zhou, H. Bagdasaryan, A. Shafi, H. Egiyan, K. Hicks, Roy Thompson, D. I. Sober, D. Hancock, E. Polli, J. Connelly, A. Coleman, Stephen M. Rock, K. S. Egiyan, M. Guillo, G. Ricco, Ji Li, C. S. Whisnant, A. Longhi, E. Wolin, K. Mikhailov, H. Funsten, P. Bosted, P. Heimberg, J. Hu, J. P. Ball, Y. Prok, J. W. Price, M. Eckhause, Philip L. Cole, M. D. Mestayer, K. Y. Kim, M. Sargsyan, J. D. Kellie, D. G. Crabb, M. Spraker, G. P. Capitani, Nicola Bianchi, K. Livingston, S. Taylor, S. Bueltmann, G. A. Peterson, S. Barrow, R. Fatemi, A. V. Vlassov, S. Boiarinov, B. M. Preedom, A. V. Skabelin, G. S. Mutchler, Moshe Gai, H. R. Weller, Friedrich Klein, R. S. Hicks, K. Wang, Brian Raue, C. Salgado, J. J. Manak, M. M. Ito, L. Todor, Laird Kramer, Jing Zhao, L. Farhi, V. Sapunenko, Valeria Muccifora, Volker D. Burkert, A. S. Biselli, Gerard Gilfoyle, R. A. Miskimen, D. Branford, M. Mirazita, and J. M. Laget
Subjects: Physics, Nuclear physics, media_common.quotation_subject, Cathode ray, General Physics and Astronomy, Resonance, High Energy Physics::Experiment, Nuclear Experiment, Spin (physics), Asymmetry, Helicity, media_common
Abstract: The double spin asymmetry in the (-->)e(-->)p --> e(prime)pi(+)n reaction has been measured for the first time in the resonance region for four-momentum transfer Q2 = 0.35-1.5 GeV(2). Data were taken at Jefferson Lab with the CLAS detector using a 2.6 GeV polarized electron beam incident on a polarized solid NH3 target. Comparison with predictions of phenomenological models shows strong sensitivity to resonance contributions. Helicity-1/2 transitions are found to be dominant in the second and third resonance regions. The measured asymmetry is consistent with a faster rise with Q(2) of the helicity asymmetry A1 for the F(15)(1680) resonance than expected from the analysis of the unpolarized data.
Published: 2002

37. Corrected Article: Exclusive electroproduction of φ mesons at 4.2 GeV [Phys. Rev. C63, 065205 (2001)]

Author: J. Domingo, R. A. Schumacher, R. A. Niyazov, John T. O'Brien, G. S. Mutchler, H. O. Funsten, Dinko Pocanic, E. S. Smith, A. Coleman, H. R. Weller, M. D. Mestayer, J. J. Manak, S. E. Kuhn, P. Corvisiero, S. McAleer, J. H. Kelley, Stephen Taylor, Sylvain Bouchigny, P. Rossi, T. A. Forest, S. Stepanyan, K. S. Dhuga, G. Gavalian, S. Boiarinov, J. R. Ficenec, M. Anghinolfi, K. A. Griffioen, J. R. Calarco, S. A. Philips, L. C. Dennis, B. E. Bonner, H. Avakian, K. S. Egiyan, M. M. Ito, Laird Kramer, B. B. Niczyporuk, Jing Zhao, James Mueller, L. C. Smith, S. J. Gaff, K. Mikhailov, Shalev Gilad, G. E. Dodge, J. S. McCarthy, M. Taiuti, R. Fatemi, Y. G. Sharabian, J. Hu, M. Ripani, N. Pivnyuk, K. Lukashin, J. Napolitano, E. Wolin, Michael Vineyard, P. Dragovitsch, G. V. O'Rielly, Baile Zhang, M. Guidal, A. K. Opper, W. J. Briscoe, E. Pasyuk, M. Battaglieri, A. V. Vlassov, D. G. Jenkins, K. Park, B. A. Mecking, J. P. Ball, D. S. Carman, P. Rubin, M. Eckhause, H. Egiyan, C. Djalali, S. Whisnant, B. M. Preedom, K. Sabourov, G. Niculescu, J. P. Cummings, L. M. Qin, S. A. Dytman, R. A. Miskimen, Volker D. Burkert, A. S. Biselli, D. G. Crabb, J. Hardie, V. Gyurjyan, E. Polli, P. Stoler, Kevin Fissum, M. Holtrop, A.V. Stavinsky, D. Branford, M. Guillo, M. Kossov, M. Mirazita, S. O. Nelson, K. Wang, W. Kim, J. M. Laget, S. Pozdniakov, L. Elouadrhiri, D. J. Tedeschi, K. Hicks, C. Salgado, Robert E. Welsh, Roy Thompson, K. Paschke, I. I. Strakovsky, Z. L. Zhou, M. Klusman, Andreas Klein, V. Sapunenko, Valeria Muccifora, J. W. Price, Kwangsoo Kim, G. Riccardi, A. Longhi, G. S. Adams, R. Clark, Gerard Gilfoyle, R. DeVita, J. W C McNabb, A. Empl, Pavel Degtiarenko, E. De Sanctis, G. Audit, O. Pogorelko, C. E. Hyde-Wright, D. I. Sober, R. J. Feuerbach, K. Beard, Frank Klein, G. A. Peterson, S. Barrow, M. Bektasoglu, K. Joo, Patrick Girard, J. Shaw, J. Yun, D. Cords, A. Yegneswaran, Nicola Bianchi, B. Carnahan, F. Sabatié, V. S. Serov, Thierry Auger, A. R. Reolon, A. P. Freyberger, Federico Ronchetti, G. Ricco, Moshe Gai, R. S. Hicks, Brian Raue, Barry Ritchie, R. C. Minehart, C. A. Meyer, L. Ciciani, S. Simionatto, K. L. Giovanetti, B. Asavapibhop, Larry Weinstein, William Bertozzi, E. Anciant, M. Khandaker, D. P. Weygand, D. Doughty, D. Heddle, A. V. Skabelin, K. Kim, I. Niculescu, D. Lawrence, William Brooks, Hall Crannell, C. Marchand, D. Rowntree, L. Yanik, P. L. Cole, and F. W. Hersman
Subjects: Physics, Elastic scattering, Nuclear and High Energy Physics, Particle physics, Meson production, Proton, Meson, Vector meson dominance, Production (computer science), HERA
Abstract: We studied the exclusive reaction $e\stackrel{\ensuremath{\rightarrow}}{p}{e}^{\ensuremath{'}}{p}^{\ensuremath{'}}\ensuremath{\varphi}$ using the $\stackrel{\ensuremath{\rightarrow}}{\ensuremath{\varphi}}{K}^{+}{K}^{\ensuremath{-}}$ decay mode. The data were collected using a 4.2 GeV incident electron beam and the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility. Our experiment covers the range in ${Q}^{2}$ from 0.7 to 2.2 ${\mathrm{GeV}}^{2},$ and W from 2.0 to 2.6 GeV. Taken together with all previous data, we find a consistent picture of $\ensuremath{\varphi}$ production on the proton. Our measurement shows the expected decrease of the t slope with the vector-meson formation time $c\ensuremath{\Delta}\ensuremath{\tau}$ below 2 fm. At $〈c\ensuremath{\Delta}\ensuremath{\tau}〉=0.6$ fm, we measure ${b}_{\ensuremath{\varphi}}=2.27\ifmmode\pm\else\textpm\fi{}0.42$ ${\mathrm{GeV}}^{\ensuremath{-}2}.$ The cross section dependence on W as ${W}^{0.2\ifmmode\pm\else\textpm\fi{}0.1}$ at ${Q}^{2}=1.3$ ${\mathrm{GeV}}^{2}$ was determined by comparison with $\ensuremath{\varphi}$ production at HERA after correcting for threshold effects. This is the same dependence as observed in photoproduction.
Published: 2001

38. Photoproduction of theρ0Meson on the Proton at Large Momentum Transfer

Author: V. Frolov, M. J. Amaryan, V. Mokeev, A. Cazes, J. P. Cummings, R. De Vita, P. Dragovitsch, Roy Thompson, R. Demirchyan, K. V. Dharmawardane, G. Asryan, R. A. Niyazov, M. Kossov, Volker D. Burkert, A. S. Biselli, J. Hardie, K. L. Giovanetti, B. Asavapibhop, R. A. Miskimen, John T. O'Brien, M. Spraker, Larry Weinstein, Laird Kramer, G. S. Adams, B. L. Berman, P. Corvisiero, G. Riccardi, M. Taiuti, M. Battaglieri, Susan Taylor, L. M. Qin, K. Joo, K. Beard, E. Anciant, L. Todor, D. Protopopescu, Kalvir S. Dhuga, K. S. Egiyan, B. A. Mecking, J. R. Calarco, A.V. Stavinsky, M. Klusman, M. M. Ito, H. Egiyan, W. Kim, R. W. Major, E. Wolin, J. W C McNabb, A. P. Freyberger, K. Mikhailov, D. J. Tedeschi, M. Khandaker, D. Branford, K. A. Griffioen, M. Mirazita, Z. L. Zhou, A. Shafi, Dinko Pocanic, L. Farhi, M. Sanzone-Arenhovel, Federico Ronchetti, J. M. Laget, B. B. Niczyporuk, D. Doughty, Shalev Gilad, B. Carnahan, G. Ricco, D. G. Crabb, N. Pivnyuk, D. Heddle, C. S. Whisnant, S. E. Kuhn, J. Napolitano, P. Stoler, A. Coleman, Philip L. Cole, H. R. Weller, Thierry Auger, A. Weisberg, A. R. Reolon, Moshe Gai, K. Sabourov, S. O. Nelson, J. Shaw, K. Hicks, M. Eckhause, P. Rossi, C. Djalali, Michael Wood, M. Lucas, R. J. Feuerbach, Friedrich Klein, R. S. Hicks, Brian Raue, V. S. Serov, V. Sapunenko, Valeria Muccifora, Michael Dugger, J. H. Kelley, F. W. Hersman, H. O. Funsten, M. Guillo, S. McAleer, J. S. McCarthy, A. V. Vlassov, Gerard Gilfoyle, O. Pogorelko, K. Lukashin, L. C. Dennis, L. C. Smith, S. J. Gaff, Nicola Bianchi, H. Avakian, L. Elouadrhiri, G. S. Mutchler, Jing Zhao, W. J. Briscoe, M. Ripani, S. A. Dytman, Elton Smith, E. N. Golovach, G. A. Peterson, W. K. Brooks, S. Barrow, J. R. Ficenec, D. S. Armstrong, M. Anghinolfi, J. Yun, D. Cords, James Mueller, A. Yegneswaran, P. D. Rubin, Y. G. Sharabian, E. DeSanctis, Baile Zhang, J. J. Manak, A. K. Opper, Y. Kuang, V. Gyurjyan, E. Polli, D. I. Sober, J. W. Price, D. Hancock, H. Denizli, A. V. Skabelin, R. C. Minehart, C. A. Meyer, D. P. Weygand, Barry Ritchie, Daniel S. Carman, G. Audit, C. E. Hyde-Wright, M. Bektasoglu, S. A. Philips, M. Guidal, M. D. Mestayer, M. Holtrop, Thomas E. Smith, S. Boiarinov, R. A. Schumacher, T. A. Forest, S. Stepanyan, Avraham Klein, Hall Crannell, C. Cetina, C. Marchand, G. E. Dodge, Michael Vineyard, B. M. Preedom, P. V. Degtyarenko, D. Lawrence, G. P. Capitani, C. Salgado, and D. Rowntree
Subjects: Nuclear physics, Physics, Proton, Meson, Momentum transfer, General Physics and Astronomy
Published: 2001

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