Author: "S. K. Nanda" / Topic: nuclear physics - Searchworks@Jio Institute Digital Library Search Results

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1. Exclusive π0p electroproduction off protons in the resonance region at photon virtualities 0.4GeV2≤Q2≤1GeV2

Author: P. Eugenio, M. Taiuti, Carlos A. Salgado, L. C. Smith, I. I. Strakovsky, B. S. Ishkhanov, R. Dupre, M. Battaglieri, Aditya R. Khanal, A. Deur, R. A. Schumacher, M. Contalbrigo, Michael Paolone, F. Bossu, C. Evans, Maxime Defurne, N. Tyler, C. Djalali, J. A. Tan, K. A. Griffioen, Pawel Nadel-Turonski, Fatiha Benmokhtar, O. Soto, R. De Vita, M. Ungaro, S. Niccolai, L. Lanza, A. D'Angelo, A. Kim, Alessandro Rizzo, T. Mineeva, S. Stepanyan, W. Kim, U. Shrestha, V. Crede, L. El Fassi, T. B. Hayward, H. Atac, R. Paremuzyan, P. Stoler, K. Joo, D. G. Jenkins, M. Leali, K. Hicks, G. Ciullo, William Brooks, N. Markov, M. Guidal, G. Niculescu, Y. Prok, L. Venturelli, W. Phelps, E. De Sanctis, V. Mascagna, I. Bedlinskiy, E. Golovatch, D. S. Carman, A. Celentano, R. W. Gothe, E. L. Isupov, M. Holtrop, Nikos Sparveris, C. W. Kim, Luciano Pappalardo, X. Wei, F. X. Girod, S. Boiarinov, G. Angelini, H. Avakian, J. W. Price, P. L. Cole, G. Rosner, N. A. Baltzell, T. Chetry, J. Rowley, K. Park, D. Sokhan, Y. Ghandilyan, F. Sabatié, Y. G. Sharabian, H. Hakobyan, H. S. Jo, E. Voutier, S. Diehl, D. G. Ireland, I. J. D. MacGregor, N. Dashyan, Volker D. Burkert, A. S. Biselli, S. Strauch, S. Adhikari, M. H. Wood, M. Osipenko, P. Chatagnon, B. McKinnon, Yordanka Ilieva, V. Mokeev, M. Mirazita, Rong Wang, M. Ehrhart, L. Barion, M. Hattawy, H. Voskanyan, S. K. Nanda, M. Ripani, M. Khachatryan, W. J. Briscoe, D. Marchand, E. Pasyuk, V. P. Kubarovsky, D. Riser, A. El Alaoui, C. Ayerbe Gayoso, Nicholas Zachariou, J. C. Carvajal, O. Pogorelko, D. Protopopescu, Frank Klein, Dustin Keller, K. Livingston, K. Hafidi, M. J. Amaryan, A. Filippi, and M. Khandaker
Subjects: Physics, Range (particle radiation), Photon, Proton, 010308 nuclear & particles physics, Resonance, 01 natural sciences, Nuclear physics, Cross section (physics), Isospin, 0103 physical sciences, Invariant mass, 010306 general physics, Legendre polynomials
Abstract: The exclusive electroproduction process ep→e′p′π0 was measured in the range of photon virtualities Q2=0.4–1.0GeV2 and the invariant mass range of the pπ0 system of W=1.1–1.8 GeV. These kinematics are covered in exclusive π0 electroproduction off the proton with nearly complete angular coverage in the pπ0 center-of-mass system and with high statistical accuracy. Nearly 36 000 cross-section points were measured, and the structure functions σT+eσL,σLT, and σTT, were extracted via fitting the ϕπ0 dependence of the cross section. A Legendre polynomial expansion analysis demonstrates the sensitivity of our data to high-lying N* and Δ* resonances with M>1.6 GeV. As part of a broad effort to determine the electrocouplings of the N* and Δ* resonances using both single- and double-pion electroproduction, this dataset is crucial for the reliable extraction of the high-lying resonance electrocouplings from the combined isospin analysis of the Nπ and π+π−p channels.
Published: 2020
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2. Measurement of double-polarization asymmetries in the quasi-elastic Process

Author: R. A. Lindgren, C. Dutta, William A. Tobias, X. Zhan, F. Garibaldi, M. H. Shabestari, G. D. Cates, D. Flay, B. Schoenrock, Henryk Witała, Y. Zhang, X. Deng, Diana Parno, T. Holmstrom, J. P. Chen, B. Zhao, P. Monaghan, Yingxiao Wang, J. Huang, P. M. King, A. Saha, G. M. Urciuoli, Bogdan Wojtsekhowski, N. Muangma, J. Gomez, Shalev Gilad, S. Golge, R. Subedi, C. W. de Jager, T. Averett, Chunhui Chen, S. Širca, A. Shahinyan, P. C. Bradshaw, X. Jiang, Xin Qian, A. Kievsky, J. St. John, P. U. Sauer, H. P. Khanal, B. Moffit, Mustafa Canan, Kalyan Allada, R. Michaels, R. Skibiński, L. El Fassi, W. U. Boeglin, A. Deltuva, A. Deur, H. Kang, B. D. Anderson, Yiyang Zhang, W. Tireman, M. Meziane, M. Posik, William Bertozzi, Z. Ye, H.-J. Lu, Wolfgang Korsch, B. E. Norum, Michele Viviani, Hiroyuki Kamada, Vincent Sulkosky, O. Glamazdin, Pete Markowitz, Olfred Hansen, J. R. M. Annand, A. Camsonne, H. F. Ibrahim, J. LeRose, W. Luo, R. De Leo, Joseph M. Katich, Kacper Topolnicki, J. W. Watson, B. Sawatzky, E. Chudakov, Haiyan Gao, L. E. Marcucci, S. Riordan, V. A. Punjabi, D. Wang, Ronald Gilman, Douglas Higinbotham, M. K. Jones, E. Jensen, Jacek Golak, K. Pan, K. Wang, X. Qui, L. Y. Zhu, S. Frullani, G. Jin, X. Zheng, S. K. Nanda, Yujie Qiang, Andrew Puckett, Rocco Schiavilla, E. Long, M. Mihovilovič, and E. Piasetzky
Subjects: Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Nuclear Theory, Observable, Kinematics, Spin structure, Polarization (waves), Breakup, 01 natural sciences, p-process, Nuclear interaction, Nuclear physics, Reaction dynamics, 0103 physical sciences, Nuclear Experiment, 010306 general physics
Abstract: We report on a precise measurement of double-polarization asymmetries in electron-induced breakup of He3 proceeding to pd and ppn final states, performed in quasi-elastic kinematics at Q2=0.25(GeV/c)2 for missing momenta up to 250MeV/c. These observables represent highly sensitive tools to investigate the electromagnetic and spin structure of He3 and the relative importance of two- and three-body effects involved in the breakup reaction dynamics. The measured asymmetries cannot be satisfactorily reproduced by state-of-the-art calculations of He3 unless their three-body segment is adjusted, indicating that the spin-dependent part of the nuclear interaction governing the three-body breakup process is much smaller than previously thought.
Published: 2018

3. Precision measurements of A1n in the deep inelastic regime

Author: S. Choi, Mustafa Canan, Kalyan Allada, H. Yao, M. Friend, A. Deur, Wouter Deconinck, Nuruzzaman, J. P. Chen, B. Sawatzky, F. Garibaldi, M. H. Shabestari, G. D. Cates, S. K. Nanda, Yujie Qiang, R. Subedi, A. Camsonne, N. Muangma, A. Shahinyan, Vincent Sulkosky, O. Glamazdin, Z. Ye, B. E. Norum, V. Mamyan, J. Huang, R. A. Lindgren, J. J. LeRose, Olfred Hansen, Bogdan Wojtsekhowski, X. Deng, X. Zhan, W. Troth, Y. Zhang, D. Flay, A. Lukhanin, B. Moffit, G. Jin, M. Posik, Douglas Higinbotham, C. Dutta, X. Zheng, Zein-Eddine Meziani, Diana Parno, William A. Tobias, D. McNulty, Arijit Saha, P. Solvignon, J. Gomez, Jen-Chieh Peng, S. Golge, Chunhui Chen, S. Širca, Haiyan Gao, Y. X. Ye, Wolfgang Korsch, L. Yuan, X. Jiang, Whitney Armstrong, G. Kumbartzki, B. Zhao, Yiyang Zhang, William Bertozzi, Yingxiao Wang, Amrendra Narayan, Joseph M. Katich, Shalev Gilad, C. W. de Jager, G. B. Franklin, M. M. Dalton, T. Holmstrom, S. Riordan, D. Wang, Ronald Gilman, R. Michaels, Abdurahim Rakhman, L. Guo, E. Long, M. Mihovilovič, A. Kelleher, Vladimir Nelyubin, Young Do Oh, H. F. Ibrahim, E. Chudakov, A. Kolarkar, Nilanga Liyanage, T. Averett, C. E. Hyde, F. Cusanno, Fatiha Benmokhtar, X. Yan, Xin Qian, and L. El Fassi
Subjects: Quantum chromodynamics, Physics, Nuclear physics, Quark, Nuclear and High Energy Physics, Proton, media_common.quotation_subject, Up quark, Neutron, Parton, Deep inelastic scattering, Asymmetry, media_common
Abstract: We have performed precision measurements of the double-spin virtual-photon asymmetry A 1 on the neutron in the deep inelastic scattering regime, using an open-geometry, large-acceptance spectrometer and a longitudinally and transversely polarized 3 He target. Our data cover a wide kinematic range 0.277 ≤ x ≤ 0.548 at an average Q 2 value of 3.078 (GeV/c) 2 , doubling the available high-precision neutron data in this x range. We have combined our results with world data on proton targets to make a leading-order extraction of the ratio of polarized-to-unpolarized parton distribution functions for up quarks and for down quarks in the same kinematic range. Our data are consistent with a previous observation of an A 1 n zero crossing near x = 0.5 . We find no evidence of a transition to a positive slope in ( Δ d + Δ d ¯ ) / ( d + d ¯ ) up to x = 0.548 .
Published: 2015
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4. Extraction of the Neutron Electric Form Factor from Measurements of Inclusive Double Spin Asymmetries

Author: G. D. Cates, T. Holmstrom, Xin Qian, Haiyan Gao, M. Meziane, Simon Širca, F. Garibaldi, H. F. Ibrahim, E. Chudakov, Houbing Lu, P. M. King, A. Shahinyan, W.U. Boeglin, V. A. Punjabi, D. G. Meekins, X. Jiang, E. Long, C. Dutta, William A. Tobias, Bogdan Wojtsekhowski, L. El Fassi, Vincent Sulkosky, S. Riordan, H. P. Khanal, A. Kelleher, H. Kang, A. Camsonne, R. A. Lindgren, Eric L. N. Jensen, N. Muangma, W. Tireman, Diana Parno, M. Mihovilovic, R. Subedi, D. Flay, Yingxiao Wang, W. Luo, M. H. Shabestari, B. Shoenrock, B. Sawatzky, Shalev Gilad, C. W. de Jager, Bryan J. Moffit, E. Piasetzky, X. Zhan, A. Deur, J.-O. Hansen, Z. Ye, B. E. Norum, Y. Zhang, M. Posik, R. Michaels, X. Deng, B. Zhao, J. Gomez, X. Qui, S. Golge, Arijit Saha, P. Monaghan, P. C. Bradshaw, Chunhui Chen, A. J. R. Puckett, L. Y. Zhu, Wolfgang Korsch, J. W. Watson, O. Glamazdin, J. R. M. Annand, S. Frullani, J. P. Chen, J. Huang, G. M. Urciuoli, William Bertozzi, Ronald Gilman, Pete Markowitz, J. LeRose, R. De Leo, J. John, Brian P. Anderson, Yiyang Zhang, Joseph M. Katich, Douglas Higinbotham, Matthew Jones, K. Pan, K. Wang, D. Wang, T. Averett, G. Jin, X. Zheng, Mustafa Canan, Kalyan Allada, S. K. Nanda, and Yujie Qiang
Subjects: Physics, Particle physics, Proton, 010308 nuclear & particles physics, media_common.quotation_subject, Nuclear Theory, Electric form factor, Form factor (quantum field theory), FOS: Physical sciences, 01 natural sciences, Asymmetry, Nuclear physics, Pion, 0103 physical sciences, Neutron detection, Neutron, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Spin-½, media_common
Abstract: $[Background]$ Measurements of the neutron charge form factor, $G^n_E$, are challenging due to the fact that the neutron has no net charge. In addition, measurements of the neutron form factors must use nuclear targets which require accurately accounting for nuclear effects. Extracting $G^n_E$ with different targets and techniques provides an important test of our handling of these effects. $[Purpose]$ The goal of the measurement was to use an inclusive asymmetry measurement technique to extract the neutron charge form factor at a four-momentum transfer of $1~(\rm{GeV/c})^2$. This technique has very different systematic uncertainties than traditional exclusive measurements and thus serves as an independent check of whether nuclear effects have been taken into account correctly. $[Method]$ The inclusive quasi-elastic reaction $^3\overrightarrow{\rm{He}}(\overrightarrow{e},e')$ was measured at Jefferson Lab. The neutron electric form factor, $G_E^n$, was extracted at $Q^2 = 0.98~(\rm{GeV/c})^2$ from ratios of electron-polarization asymmetries measured for two orthogonal target spin orientations. This $Q^2$ is high enough that the sensitivity to $G_E^n$ is not overwhelmed by the neutron magnetic contribution, and yet low enough that explicit neutron detection is not required to suppress pion production. $[Results]$ The neutron electric form factor, $G_E^n$, was determined to be $0.0414\pm0.0077\;{(stat)}\pm0.0022\;{(syst)}$; providing the first high precision inclusive extraction of the neutron's charge form factor. $[Conclusions]$ The use of the inclusive quasi-elastic $^3\overrightarrow{\rm{He}}(\overrightarrow{e},e')$ with a four-momentum transfer near $1~(\rm{GeV/c})^2$ has been used to provide a unique measurement of $G^n_E$. This new result provides a systematically independent validation of the exclusive extraction technique results., 7 pages, 2 figures, 2 tables
Published: 2017

5. First measurement of unpolarized semi-inclusive deep-inelastic scattering cross sections from a He3 target

Author: Nilanga Liyanage, D. J. Margaziotis, T. Liu, G. D. Cates, X. Zhan, Young Do Oh, Y. Li, E. Cisbani, P. C. Bradshaw, D. McNulty, Arijit Saha, C. Dutta, J. C. Cornejo, A. Kolarkar, Simon Širca, Chunhui Chen, R. A. Lindgren, J. J. LeRose, F. Garibaldi, A. Shahinyan, P. A. M. Dolph, F. Cusanno, William A. Tobias, L. G. Tang, Abdurahim Rakhman, X. Yan, Y. Zhang, W. Kim, V. Sulkosky, A. Deur, M. Huang, Ronald Ransome, H. Ding, H. F. Ibrahim, H. Yao, R. Michaels, Mustafa Canan, Xin Qian, S. K. Phillips, Kalyan Allada, William Bertozzi, Yanxi Zhang, Bogdan Wojtsekhowski, T. Averett, X. Jiang, C. Munoz Camacho, B. Zhao, L. Guo, E. Long, M. M. Dalton, Wouter Deconinck, M. Posik, L. El Fassi, S. Riordan, Wolfgang Korsch, P. E. Bosted, Haiyan Gao, Zein-Eddine Meziani, Ronald Gilman, David Hamilton, M. H. Shabestari, Pete Markowitz, Y. F. Wang, E. Chudakov, S. Frullani, X. Zong, A. Kelleher, M. Osipenko, I. Vilardi, Xiaofeng Zhu, Dipanwita Dutta, X. Deng, B. Sawatzky, Jen-Chieh Peng, G. Jin, A. J. R. Puckett, B. Moffit, Y. X. Ye, Houbing Lu, X. Zheng, S. Stepanyan, W. Chen, Fatiha Benmokhtar, R. De Leo, T. Holmstrom, L. Yuan, Vladimir Nelyubin, R. Subedi, Shalev Gilad, Diana Parno, K. Chirapatpimol, J. P. Chen, C. W. de Jager, O. Glamazdin, E. Schulte, K. A. Aniol, Olfred Hansen, J. R. M. Annand, S. K. Nanda, Yujie Qiang, S. Golge, L. Y. Zhu, J. Huang, G. M. Urciuoli, Alexandre Camsonne, Z. Ye, B. E. Norum, Y. Zhao, X. Li, Mauro Iodice, Douglas Higinbotham, M. K. Jones, K. Wang, S. Marrone, Amrendra Narayan, Joseph M. Katich, and D. Gaskell
Subjects: Quark, Quantum chromodynamics, Physics, Particle physics, 010308 nuclear & particles physics, Scattering, Quark model, Deep inelastic scattering, 01 natural sciences, Nuclear physics, 0103 physical sciences, Neutron, Nuclear cross section, 010306 general physics, Nucleon
Abstract: The unpolarized semi-inclusive deep-inelastic scattering (SIDIS) differential cross sections in He3(e,e′π±)X have been measured for the first time in Jefferson Lab experiment E06-010 with a 5.9GeVe− beam on a He3 gas target. The experiment focuses on the valence quark region, covering a kinematic range 0.12
Published: 2017
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6. Measurement of parity violation in electron–quark scattering

Author: William Bertozzi, A. V. Glamazdin, E. Long, D. S. Armstrong, D. McNulty, Arijit Saha, G. D. Cates, B. Waidyawansa, Bogdan Wojtsekhowski, Amrendra Narayan, J. LeRose, R. De Leo, Jongmin Lee, S. Kowalski, J. Roche, Xin Qian, D. J. Margaziotis, J. P. Chen, D. G. Meekins, Vladimir Nelyubin, Douglas Higinbotham, L. Ye, J. Huang, C. E. Hyde, C. M. Sutera, Nuruzzaman, Shalev Gilad, B. P. Quinn, N. Muangma, S. K. Phillips, R. Holmes, E. Cisbani, L. El Fassi, M. M. Dalton, S. K. Nanda, M. Mihovilovic, Kent Paschke, Yujie Qiang, John Arrington, C. W. de Jager, K. A. Aniol, R. J. Holt, K. Rider, K. Pan, P. E. Reimer, A. Giusa, P. M. King, Franco Meddi, Vincent Sulkosky, Fatiha Benmokhtar, Kiadtisak Saenboonruang, B. Sawatzky, R. S. Beminiwattha, R. Silwal, Wouter Deconinck, Nilanga Liyanage, E. Chudakov, F. Garibaldi, Ho-Young Kang, J. O. Hansen, D. Wang, T. Holmstrom, Mustafa Canan, X. Zheng, Kalyan Allada, X. Deng, S. Frullani, Diana Parno, G.V. Russo, B. Zhao, R. Subedi, Jay Benesch, K. E. Myers, Z. Ahmed, C. M. Jen, A. Deur, D. C. Jones, S. Riordan, D. Flay, C. Dutta, R. Michaels, Young Do Oh, William A. Tobias, Abdurahim Rakhman, A. Camsonne, K. Hafidi, G. M. Urciuoli, K. Grimm, V. Bellini, G. B. Franklin, J. G. Rubin, Simon Širca, R. Suleiman, M. Friend, L. Mercado, K. S. Kumar, S. Golge, Jens Erler, A. Shahinyan, Z. E. Meziani, and Paul Souder
Subjects: Physics, Quark, Particle physics, Multidisciplinary, Scattering, Physics beyond the Standard Model, media_common.quotation_subject, High Energy Physics::Phenomenology, Electroweak interaction, Parity (physics), Electron, Asymmetry, Nuclear physics, High Energy Physics::Experiment, media_common
Abstract: Symmetry permeates nature and is fundamental to all laws of physics. One example is parity (mirror) symmetry, which implies that flipping left and right does not change the laws of physics. Laws for electromagnetism, gravity and the subatomic strong force respect parity symmetry, but the subatomic weak force does not. Historically, parity violation in electron scattering has been important in establishing (and now testing) the standard model of particle physics. One particular set of quantities accessible through measurements of parity-violating electron scattering are the effective weak couplings C2q, sensitive to the quarks' chirality preference when participating in the weak force, which have been measured directly only once in the past 40 years. Here we report a measurement of the parity-violating asymmetry in electron-quark scattering, which yields a determination of 2C2u - C2d (where u and d denote up and down quarks, respectively) with a precision increased by a factor of five relative to the earlier result. These results provide evidence with greater than 95 per cent confidence that the C2q couplings are non-zero, as predicted by the electroweak theory. They lead to constraints on new parity-violating interactions beyond the standard model, particularly those due to quark chirality. Whereas contemporary particle physics research is focused on high-energy colliders such as the Large Hadron Collider, our results provide specific chirality information on electroweak theory that is difficult to obtain at high energies. Our measurement is relatively free of ambiguity in its interpretation, and opens the door to even more precise measurements in the future.
Published: 2014
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7. Measurement of the single-spin asymmetry Ay0 in quasi-elastic 3He↑(e,e′n) scattering at 0.4 < Q2 < 1.0 GeV/c2

Author: E. Long, O. Glamazdin, J. R. M. Annand, J. P. Chen, S. K. Nanda, Yujie Qiang, A. Kelleher, J. Huang, M. Mihovilovič, A. Deur, T. Holmstrom, F. Garibaldi, Z. Ye, B. E. Norum, William Bertozzi, Pete Markowitz, M. H. Shabestari, L. Y. Zhu, J. Gomez, X. Jiang, B. Zhao, R. De Leo, X. Deng, S. Riordan, P. Monaghan, A. Shahinyan, Y. Zhang, T. Averett, Xin Qian, G. Jin, Chunhui Chen, S. Širca, J. St. John, M. Meziane, A. Camsonne, B. D. Anderson, X. Zheng, B. Moffit, H. F. Ibrahim, B. Sawatzky, H.-J. Lu, B. Shoenrock, S. Golge, L. El Fassi, W. U. Boeglin, Wolfgang Korsch, P. M. King, Vincent Sulkosky, E. Chudakov, R. Subedi, C. Dutta, William A. Tobias, J. O. Hansen, V. A. Punjabi, Bogdan Wojtsekhowski, J. W. Watson, X. Qui, N. Muangma, R. Michaels, H. P. Khanal, W. Tireman, G. D. Cates, X. Zhan, Yingxiao Wang, H. Kang, S. Frullani, G. M. Urciuoli, M. Posik, Shalev Gilad, R. A. Lindgren, J. J. LeRose, C. W. de Jager, W. Luo, Diana Parno, A. J. R. Puckett, D. Flay, Haiyan Gao, D. Wang, E. Piasetzky, Ronald Gilman, Mustafa Canan, Kalyan Allada, Yiyang Zhang, Joseph M. Katich, Douglas Higinbotham, A. Saha, M. K. Jones, P. C. Bradshaw, E. Jensen, K. Pan, and K. Wang
Subjects: Physics, Nuclear reaction, Nuclear and High Energy Physics, Meson, 010308 nuclear & particles physics, Scattering, media_common.quotation_subject, Plane wave, Electron, 01 natural sciences, Asymmetry, Nuclear physics, 0103 physical sciences, Neutron, Nuclear Experiment, 010306 general physics, Electron scattering, media_common
Abstract: Due to the lack of free neutron targets, studies of the structure of the neutron are typically made by scattering electrons from either 2H or 3He targets. In order to extract useful neutron information from a 3He target, one must understand how the neutron in a 3He system differs from a free neutron by taking into account nuclear effects such as final state interactions and meson exchange currents. The target single spin asymmetry A y 0 is an ideal probe of such effects, as any deviation from zero indicates effects beyond plane wave impulse approximation. New measurements of the target single spin asymmetry A y 0 at Q 2 of 0.46 and 0.96 (GeV/ c ) 2 were made at Jefferson Lab using the quasi-elastic He ↑ 3 ( e , e ′ n ) reaction. Our measured asymmetry decreases rapidly, from > 20 % at Q 2 = 0.46 (GeV/ c ) 2 to nearly zero at Q 2 = 0.96 (GeV / c ) 2 , demonstrating the fall-off of the reaction mechanism effects as Q 2 increases. We also observed a small ϵ-dependent increase in A y 0 compared to previous measurements, particularly at moderate Q 2 . This indicates that upcoming high Q 2 measurements from the Jefferson Lab 12 GeV program can cleanly probe neutron structure from polarized 3He using plane wave impulse approximation.
Published: 2019
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8. Measurement of the Target-Normal Single-Spin Asymmetry in Quasielastic Scattering from the ReactionHe3↑(e,e′ )

Author: H. F. Ibrahim, E. Piasetzky, G. D. Cates, Y. Zhang, J. Gomez, Bogdan Wojtsekhowski, S. Frullani, C. Dutta, Chunhui Chen, S. Širca, E. Chudakov, William A. Tobias, R. Subedi, Mustafa Canan, Kalyan Allada, G. Jin, X. Zhan, B. Zhao, S. Golge, R. Michaels, X. Zheng, B. Schoenrock, P. Monaghan, B. D. Anderson, O. Glamazdin, Olfred Hansen, J. R. M. Annand, A. Saha, F. Garibaldi, S. K. Nanda, H. P. Khanal, Yujie Qiang, Andrew Puckett, M. H. Shabestari, Pete Markowitz, H. Kang, C. Ayerbe-Gayoso, Z. Ye, M. Posik, B. E. Norum, W. Luo, Rocco Schiavilla, Diana Parno, X. Deng, P. C. Bradshaw, X. Jiang, B. Sawatzky, Yingxiao Wang, Xin Qian, R. De Leo, G. M. Urciuoli, N. Muangma, T. Holmstrom, L. Y. Zhu, Shalev Gilad, Yiyang Zhang, C. W. de Jager, Haiyan Gao, J. P. Chen, L. El Fassi, W. U. Boeglin, Joseph M. Katich, J. Huang, S. Riordan, E. Long, Douglas Higinbotham, M. K. Jones, X. Qiu, M. Mihovilovič, E. Jensen, J. St. John, B. Moffit, Wolfgang Korsch, W. Tireman, K. Pan, K. Wang, A. Deur, P. M. King, Guy Ron, D. Wang, Ronald Gilman, J. W. Watson, V. A. Punjabi, A. Shahinyan, M. Meziane, A. Camsonne, H.-J. Lu, Vincent Sulkosky, T. Averett, R. A. Lindgren, J. J. LeRose, and D. Flay
Subjects: Physics, Quasielastic scattering, Particle physics, Scattering, media_common.quotation_subject, General Physics and Astronomy, Parton, Polarization (waves), Asymmetry, Nuclear physics, High Energy Physics::Experiment, Neutron, Nuclear Experiment, Nucleon, Lepton, media_common
Abstract: We report the first measurement of the target single-spin asymmetry, A(y), in quasielastic scattering from the inclusive reaction (3)He(↑)(e,e') on a (3)He gas target polarized normal to the lepton scattering plane. Assuming time-reversal invariance, this asymmetry is strictly zero for one-photon exchange. A nonzero A(y) can arise from the interference between the one- and two-photon exchange processes which is sensitive to the details of the substructure of the nucleon. An experiment recently completed at Jefferson Lab yielded asymmetries with high statistical precision at Q(2)=0.13, 0.46, and 0.97 GeV(2). These measurements demonstrate, for the first time, that the (3)He asymmetry is clearly nonzero and negative at the 4σ-9σ level. Using measured proton-to-(3)He cross-section ratios and the effective polarization approximation, neutron asymmetries of -(1-3)% were obtained. The neutron asymmetry at high Q(2) is related to moments of the generalized parton distributions (GPDs). Our measured neutron asymmetry at Q(2)=0.97 GeV(2) agrees well with a prediction based on two-photon exchange using a GPD model and thus provides a new, independent constraint on these distributions.
Published: 2015
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9. Double spin asymmetries of inclusive hadron electroproduction from a transversely polarizedHe3target

Author: S. K. Nanda, Yujie Qiang, H. Yao, M. M. Dalton, S. Riordan, Bogdan Wojtsekhowski, S. S. Stepanyan, Mustafa Canan, T. Holmstrom, Wolfgang Korsch, Kalyan Allada, J. C. Cornejo, L. G. Tang, Y. Zhang, D. McNulty, P. A. M. Dolph, T. Averett, Abdurahim Rakhman, M. Huang, Jen-Chieh Peng, X. Zong, S. K. Phillips, B. Sawatzky, X. Li, G. Jin, X. Zheng, C. Dutta, Nilanga Liyanage, Franco Garibaldi, L. Yuan, A. Camsonne, Chunhui Chen, B. Zhao, L. Guo, K. Chirapatpimol, Salvatore Frullani, Y. Li, D. J. Margaziotis, Simon Širca, Young Do Oh, Vincent Sulkosky, E. Long, Mauro Iodice, F. Cusanno, L. Y. Zhu, William A. Tobias, W. Kim, A. Deur, E. Cisbani, A. J. R. Puckett, J. P. Chen, Fatiha Benmokhtar, S. Golge, A. Kelleher, H. J. Lu, A. Shahinyan, R. A. Lindgren, J. J. LeRose, Yong Zhang, I. Vilardi, H. Ding, A. Kolarkar, Vladimir Nelyubin, J. Huang, G. M. Urciuoli, H. F. Ibrahim, E. Schulte, Xiaofeng Zhu, Dipangkar Dutta, R. Michaels, G. D. Cates, X. Zhan, E. Chudakov, M. Osipenko, William Bertozzi, Haiyan Gao, O. Glamazdin, Z. Ye, B. E. Norum, Diana Parno, S. Marrone, Olfred Hansen, J. R. M. Annand, Y. Zhao, David Hamilton, Pete Markowitz, A. Saha, M. H. Shabestari, P. Bosted, Y. X. Ye, R. De Leo, X. Yan, Ronald Ransome, Xin Qian, Yingxiao Wang, P. C. Bradshaw, M. Posik, X. Deng, Zein-Eddine Meziani, L. El Fassi, C. Muñoz Camacho, Shalev Gilad, C. W. de Jager, K. A. Aniol, Wouter Deconinck, R. Subedi, Amrendra Narayan, Joseph M. Katich, D. Gaskell, Ronald Gilman, Douglas Higinbotham, M. K. Jones, B. Moffit, K. Wang, X. Jiang, and W. Chen
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Scattering, Hadron, chemistry.chemical_element, Parton, Horizontal plane, Polarization (waves), Helicity, Nuclear physics, chemistry, Cathode ray, High Energy Physics::Experiment, Nuclear Experiment, Helium
Abstract: We report the measurement of beam-target double-spin asymmetries ALT in the inclusive production of identified hadrons, e +³He↑ → h + X, using a longitudinally polarized 5.9 GeV electron beam and a transversely polarized ³He target. Hadrons (π±, K± and proton) were detected at 16° with an average momentum h>=2.35 GeV/c and a transverse momentum (pT) coverage from 0.60 to 0.68 GeV/c. Asymmetries from the ³He target were observed to be non-zero for π± production when the target was polarized transversely in the horizontal plane. The π⁺ and π⁻ asymmetries have opposite signs, analogous to the behavior of ALT in semi-inclusive deep-inelastic scattering.
Published: 2015
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10. Constraints on the nucleon strange form factors at Q2∼0.1 GeV2

Author: V. Sulkosky, J. LeRose, M. Mazouz, L. J. Kaufman, R. I. Pomatsalyuk, S. K. Nanda, Yujie Qiang, J. P. Chen, P. Decowski, P. Monaghan, J. Cahoon, B. Craver, F. Garibaldi, G. M. Urciuoli, D. J. Margaziotis, T. Averett, H. Benaoum, H. F. Ibrahim, Bogdan Wojtsekhowski, V. Gorbenko, B. Reitz, J. Roche, Kent Paschke, Seonho Choi, E. Chudakov, William A. Tobias, Peter S. LaViolette, E. Burtin, A. V. Glamazdin, Ronald Gilman, R. Subedi, A. Kolarkar, R. Suleiman, D. Lambert, K. Fuoti, Douglas Higinbotham, D. S. Armstrong, R. Snyder, R. J. Feuerbach, K. McCormick, A. Kelleher, C. W. de Jager, K. Wang, Antonin Vacheret, X. Zheng, K. A. Aniol, Bryan J. Moffit, C. Ferdi, D. Neyret, Jaideep Singh, M. Poelker, F. Cusanno, Nilanga Liyanage, Richard Wilson, Z. E. Meziani, D. G. Meekins, R. Holmes, S. Frullani, S. Kowalski, D. Lhuillier, E. Voutier, J. M. Finn, M. Stutzman, Paul Souder, D. Deepa, G. D. Cates, A. Saha, J. Hansknecht, T. Holmstrom, C. Muñoz-Camacho, R. Michaels, V. Nelyubin, X. Jiang, T. B. Humensky, Y. C. Chao, J. Grames, C. C. Chang, K. S. Kumar, and P.Y. Bertin
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Magnetic moment, Neutral current, 010308 nuclear & particles physics, Scattering, media_common.quotation_subject, Form factor (quantum field theory), 01 natural sciences, Asymmetry, Nuclear physics, 0103 physical sciences, Neutron, 010306 general physics, Nucleon, Beam energy, media_common
Abstract: We report the most precise measurement to date of a parity-violating asymmetry in elastic electron–proton scattering. The measurement was carried out with a beam energy of 3.03 GeV and a scattering angle 〈 θ lab 〉 = 6.0 ○ , with the result A PV = ( − 1.14 ± 0.24 ( stat ) ± 0.06 ( syst ) ) × 10 −6 . From this we extract, at Q 2 = 0.099 GeV 2 , the strange form factor combination G E s + 0.080 G M s = 0.030 ± 0.025 ( stat ) ± 0.006 ( syst ) ± 0.012 ( FF ) where the first two errors are experimental and the last error is due to the uncertainty in the neutron electromagnetic form factor. This result significantly improves current knowledge of G E s and G M s at Q 2 ∼ 0.1 GeV 2 . A consistent picture emerges when several measurements at about the same Q 2 value are combined: G E s is consistent with zero while positive values are favored for G M s , though G E s = G M s = 0 is compatible with the data at 95% C.L.
Published: 2006
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11. Measurement of Double-Polarization Asymmetries in the QuasielasticHe→3(e→,e′d)Process

Author: P. U. Sauer, M. Viviani, V. A. Punjabi, T. Averett, W. Tireman, P. M. King, Bogdan Wojtsekhowski, Yiyang Zhang, M. H. Shabestari, C. Dutta, William A. Tobias, F. Garibaldi, H. P. Khanal, Joseph M. Katich, A. Shahinyan, Simon Širca, R. Skibiński, Mustafa Canan, H. Kang, Kalyan Allada, B. D. Anderson, M. Mihovilovic, Z. Ye, Douglas Higinbotham, A. Deltuva, A. Deur, M. K. Jones, B. E. Norum, G. D. Cates, X. Deng, E. Jensen, Y. Zhang, Yingxiao Wang, Wolfgang Korsch, K. Pan, X. Jiang, Henryk Witała, L. E. Marcucci, K. Wang, L. Y. Zhu, G. M. Urciuoli, Xin Qian, N. Muangma, Shalev Gilad, C. W. de Jager, J. St. John, S. Riordan, X. Zhan, B. Moffit, A. Kievsky, B. Schoenrock, S. Golge, H. F. Ibrahim, L. El Fassi, W. U. Boeglin, Diana Parno, E. Long, J. Watson, D. Wang, E. Chudakov, Pete Markowitz, Ronald Gilman, R. A. Lindgren, J. J. LeRose, O. Glamazdin, R. De Leo, Olfred Hansen, J. R. M. Annand, G. Jin, J. P. Chen, W. Luo, X. Zheng, Haiyan Gao, B. Zhao, S. K. Nanda, J. Huang, Yujie Qiang, Andrew Puckett, J. Gomez, P. Monaghan, Rocco Schiavilla, D. Flay, B. Sawatzky, M. Meziane, A. Camsonne, T. Holmstrom, H.-J. Lu, Vincent Sulkosky, Jacek Golak, X. Qui, R. Michaels, M. Posik, E. Piasetzky, S. Frullani, R. Subedi, Arijit Saha, Chunhui Chen, and P. C. Bradshaw
Subjects: Nuclear physics, Physics, Scattering, Hadron, General Physics and Astronomy, Electron, Kinematics, Few-body systems, Functional dependency, Polarization (waves), Omega
Abstract: We present a precise measurement of double-polarization asymmetries in the 3He(e,e'd) reaction. This particular process is a uniquely sensitive probe of hadron dynamics in 3He and the structure of the underlying electromagnetic currents. The measurements have been performed in and around quasi-elastic kinematics at Q2=0.25(GeV/c)2 for missing momenta up to 270MeV/c. The asymmetries are in fair agreement with the state-of-the-art calculations in terms of their functional dependencies on pm and omega, but are systematically offset. Beyond the region of the quasi-elastic peak, the discrepancies become even more pronounced. Thus, our measurements have been able to reveal deficiencies in the most sophisticated calculations of the three-body nuclear system, and indicate that further refinement in the treatment of their two- and/or three-body dynamics is required.
Published: 2014
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12. Measurement of 'pretzelosity' asymmetry of charged pion production in semi-inclusive deep inelastic scattering on a polarizedHe3target

Author: Jen-Chieh Peng, M. Osipenko, L. Yuan, K. Chirapatpimol, J. P. Chen, Y. X. Ye, Franco Garibaldi, Simon Širca, Y. Zhang, M. Huang, W. Kim, R. A. Lindgren, J. J. LeRose, J. Huang, G. M. Urciuoli, A. Kolarkar, A. Deur, X. Jiang, A. Saha, I. Vilardi, H. Ding, Salvatore Frullani, D. J. Margaziotis, M. M. Dalton, M. H. Shabestari, J. C. Cornejo, S. Riordan, R. Michaels, Xiaofeng Zhu, Douglas Higinbotham, M. K. Jones, C. Muñoz Camacho, B. Sawatzky, L. G. Tang, B. Zhao, X. Li, X. Zhan, X. Yan, M. Posik, X. Deng, Y. Li, Mauro Iodice, Abdurahim Rakhman, P. C. Bradshaw, William Bertozzi, T. Averett, S. Golge, D. McNulty, A. Camsonne, H. J. Lu, T. Holmstrom, David Hamilton, Pete Markowitz, H. Yao, Diana Parno, L. Guo, K. Wang, X. Zong, Chunhui Chen, Vincent Sulkosky, E. Long, S. Marrone, W. Chen, Z. E. Meziani, R. De Leo, Bogdan Wojtsekhowski, G. D. Cates, Yong Zhang, S. S. Stepanyan, A. Kelleher, B. Moffit, Vladimir Nelyubin, F. Cusanno, Nilanga Liyanage, Amrendra Narayan, Joseph M. Katich, P. Bosted, A. J. R. Puckett, Z. Ye, B. E. Norum, Mustafa Canan, Kalyan Allada, D. Gaskell, A. Shahinyan, Wolfgang Korsch, Fatiha Benmokhtar, E. Cisbani, Ronald Gilman, P. A. M. Dolph, Ronald Ransome, Xin Qian, L. El Fassi, Young Do Oh, C. Dutta, William A. Tobias, Yingxiao Wang, G. Jin, X. Zheng, S. K. Phillips, Shalev Gilad, C. W. de Jager, K. A. Aniol, H. F. Ibrahim, S. K. Nanda, Yujie Qiang, Dipangkar Dutta, Wouter Deconinck, R. Subedi, E. Chudakov, O. Glamazdin, Olfred Hansen, J. R. M. Annand, L. Y. Zhu, Haiyan Gao, and E. Schulte
Subjects: Quark, Physics, Nuclear and High Energy Physics, Particle physics, Scattering, media_common.quotation_subject, Deep inelastic scattering, Asymmetry, Nuclear physics, Pion, Distribution function, Neutron, Nuclear Experiment, Nucleon, media_common
Abstract: An experiment to measure single-spin asymmetries of semi-inclusive production of charged pions in deep-inelastic scattering on a transversely polarized $^{3}\mathrm{He}$ target was performed at Jefferson Laboratory in the kinematic region of $0.16lxl0.35$ and $1.4l{Q}^{2}l2.7$ ${\mathrm{GeV}}^{2}$. Pretzelosity asymmetries on $^{3}\mathrm{He}$, which are expressed as the convolution of the ${h}_{1T}^{\ensuremath{\perp}}$ transverse-momentum-dependent distribution functions and the Collins fragmentation functions in the leading order, were measured for the first time. Under the effective polarization approximation, we extracted the corresponding neutron asymmetries from the measured $^{3}\mathrm{He}$ asymmetries and cross-section ratios between the proton and $^{3}\mathrm{He}$. Our results show that both ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$ on $^{3}\mathrm{He}$ and on neutron pretzelosity asymmetries are consistent with zero within experimental uncertainties.
Published: 2014
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13. Measurement of the Target-Normal Single-Spin Asymmetry in Deep-Inelastic Scattering from the Reaction He3↑(e,e′)X

Author: W. Chen, S. Marrone, M. Osipenko, A. Kolarkar, Salvatore Frullani, Nilanga Liyanage, D. J. Margaziotis, E. Cisbani, T. Averett, M. Huang, X. Jiang, L. Guo, E. Long, Y. X. Ye, Wouter Deconinck, G. Jin, Bogdan Wojtsekhowski, H. Yao, X. Zheng, R. Subedi, F. Cusanno, A. Kelleher, S. K. Nanda, Yujie Qiang, William Bertozzi, X. Yan, Ronald Ransome, David Hamilton, Fatiha Benmokhtar, C. Dutta, Pete Markowitz, Xin Qian, M. H. Shabestari, P. A. M. Dolph, L. El Fassi, L. Zhu, R. De Leo, X. Deng, J. C. Cornejo, L. G. Tang, Yingxiao Wang, J. P. Chen, W. Kim, Shalev Gilad, D. McNulty, C. W. de Jager, K. A. Aniol, J. Huang, G. M. Urciuoli, Chunhui Chen, X. Zhan, Diana Parno, S. K. Phillips, X. Li, B. Moffit, Mauro Iodice, Wolfgang Korsch, Franco Garibaldi, S. S. Stepanyan, Simon Širca, Mustafa Canan, Kalyan Allada, Xiaofeng Zhu, A. Shahinyan, M. Posik, X. Zong, A. J. R. Puckett, Y. Li, P. Bosted, Z. E. Meziani, R. A. Lindgren, J. J. LeRose, A. Saha, M. M. Dalton, Jen-Chieh Peng, B. Sawatzky, Young Do Oh, I. Vilardi, H. Ding, P. C. Bradshaw, S. Riordan, L. Yuan, T. Holmstrom, H. F. Ibrahim, K. Chirapatpimol, Dipangkar Dutta, A. Camsonne, E. Chudakov, Vincent Sulkosky, A. Deur, R. Michaels, C. Muñoz Camacho, B. Zhao, Adam M. Tobias, G. D. Cates, Douglas Higinbotham, Yong Zhang, M. K. Jones, E. Schulte, O. Glamazdin, Vladimir Nelyubin, Olfred Hansen, J. R. M. Annand, K. Wang, Abdurahim Rakhman, Y. Zhang, Haiyan Gao, Amrendra Narayan, Joseph M. Katich, D. Gaskell, S. Golge, H. J. Lu, Ronald Gilman, Z. Ye, B. E. Norum, and Y. Zhao
Subjects: Physics, Range (particle radiation), Scattering, media_common.quotation_subject, General Physics and Astronomy, Deep inelastic scattering, Asymmetry, Nuclear physics, Cathode ray, High Energy Physics::Experiment, Born approximation, Nuclear Experiment, media_common, Sign (mathematics), Spin-½
Abstract: We report the first measurement of the target-normal single-spin asymmetry in deep-inelastic scattering from the inclusive reaction ^3He^↑ (e,e′) X on a polarized ^3He gas target. Assuming time-reversal invariance, this asymmetry is strictly zero in the Born approximation but can be nonzero if two-photon-exchange contributions are included. The experiment, conducted at Jefferson Lab using a 5.89 GeV electron beam, covers a range of 1.7 2 GeV, which is nonzero at the 2.89σ level. Our measured asymmetry agrees both in sign and magnitude with a two-photon-exchange model prediction that uses input from the Sivers transverse momentum distribution obtained from semi-inclusive deep-inelastic scattering.
Published: 2014
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14. GEp/GMpRatio by Polarization Transfer ine→p→ep→

Author: M. K. Jones, K. A. Aniol, F. T. Baker, J. Berthot, P. Y. Bertin, W. Bertozzi, A. Besson, L. Bimbot, W. U. Boeglin, E. J. Brash, D. Brown, J. R. Calarco, L. S. Cardman, C.-C. Chang, J.-P. Chen, E. Chudakov, S. Churchwell, E. Cisbani, D. S. Dale, R. De Leo, A. Deur, B. Diederich, J. J. Domingo, M. B. Epstein, L. A. Ewell, K. G. Fissum, A. Fleck, H. Fonvieille, S. Frullani, J. Gao, F. Garibaldi, A. Gasparian, G. Gerstner, S. Gilad, R. Gilman, A. Glamazdin, C. Glashausser, J. Gomez, V. Gorbenko, A. Green, J.-O. Hansen, C. R. Howell, G. M. Huber, M. Iodice, C. W. de Jager, S. Jaminion, X. Jiang, W. Kahl, J. J. Kelly, M. Khayat, L. H. Kramer, G. Kumbartzki, M. Kuss, E. Lakuriki, G. Lavessière, J. J. LeRose, M. Liang, R. A. Lindgren, N. Liyanage, G. J. Lolos, R. Macri, R. Madey, S. Malov, D. J. Margaziotis, P. Markowitz, K. McCormick, J. I. McIntyre, R. L. J. van der Meer, R. Michaels, B. D. Milbrath, J. Y. Mougey, S. K. Nanda, E. A. J. M. Offermann, Z. Papandreou, C. F. Perdrisat, G. G. Petratos, N. M. Piskunov, R. I. Pomatsalyuk, D. L. Prout, V. Punjabi, G. Quéméner, R. D. Ransome, B. A. Raue, Y. Roblin, R. Roche, G. Rutledge, P. M. Rutt, A. Saha, T. Saito, A. J. Sarty, T. P. Smith, P. Sorokin, S. Strauch, R. Suleiman, K. Takahashi, J. A. Templon, L. Todor, P. E. Ulmer, G. M. Urciuoli, P. Vernin, B. Vlahovic, H. Voskanyan, K. Wijesooriya, B. B. Wojtsekhowski, R. J. Woo, F. Xiong, G. D. Zainea, and Z.-L. Zhou
Subjects: Elastic scattering, Physics, Proton, 010308 nuclear & particles physics, Proton magnetic moment, General Physics and Astronomy, Electron, Polarization (waves), 01 natural sciences, Charged particle, Nuclear physics, Magnetization, 0103 physical sciences, Magnetic form factor, Physics::Accelerator Physics, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract: The ratio of the proton's elastic electromagnetic form factors was obtained by measuring the transverse and longitudinal polarizations of recoiling protons from the elastic scattering of polarized electrons with unpolarized protons. The ratio of the electric to magnetic form factor is proportional to the ratio of the transverse to longitudinal recoil polarizations. The ratio was measured over a range of four-momentum transfer squared between 0.5 and 3.5 GeV-squared. Simultaneous measurement of transverse and longitudinal polarizations in a polarimeter provides good control of the systematic uncertainty. The results for the ratio of the proton's electric to magnetic form factors show a systematic decrease with increasing four momentum squared, indicating for the first time a marked difference in the spatial distribution of charge and magnetization currents in the proton.
Published: 2000
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15. Single Spin Asymmetries of Inclusive Hadrons Produced in Electron Scattering from a Transversely Polarized $^3$He Target

Author: B. Sawatzky, X. Li, M. Posik, A. Camsonne, Xiaofeng Zhu, Mauro Iodice, Nilanga Liyanage, Vincent Sulkosky, Yingxiao Wang, T. Averett, J. P. Chen, Bogdan Wojtsekhowski, X. Zong, J. Huang, G. M. Urciuoli, Ronald Gilman, J. C. Cornejo, X. Yan, A. J. R. Puckett, Shalev Gilad, C. W. de Jager, R. A. Lindgren, J. J. LeRose, E. Cisbani, K. A. Aniol, W. Kim, M. H. Shabestari, Fatiha Benmokhtar, L. G. Tang, I. Vilardi, B. Moffit, A. Tobias, Wouter Deconinck, H. Ding, R. Michaels, Franco Garibaldi, Salvatore Frullani, Simon Širca, William Bertozzi, R. Subedi, F. Cusanno, G. D. Cates, A. Kolarkar, X. Deng, Amrendra Narayan, H. J. Lu, David Hamilton, Pete Markowitz, H. Yao, Joseph M. Katich, D. Gaskell, A. Deur, Haiyan Gao, C. Dutta, Y. Li, P. A. M. Dolph, R. De Leo, T. Holmstrom, D. McNulty, Arijit Saha, G. Jin, X. Zhan, Douglas Higinbotham, M. K. Jones, X. Zheng, O. Glamazdin, Olfred Hansen, J. R. M. Annand, S. Marrone, Chunhui Chen, Jen-Chieh Peng, S. K. Nanda, L. Guo, A. Shahinyan, M. Osipenko, Yujie Qiang, W. Chen, E. Long, L. Y. Zhu, K. Wang, Z. Ye, B. E. Norum, Y. Zhao, L. Yuan, Y. X. Ye, K. Chirapatpimol, Ronald Ransome, Y. Zhang, Diana Parno, Xin Qian, P. C. Bradshaw, A. Kelleher, E. Schulte, P. Bosted, M. Huang, S. Golge, X. Jiang, L. El Fassi, Z. E. Meziani, Wolfgang Korsch, D. J. Margaziotis, Young Do Oh, S. K. Phillips, C. Muñoz Camacho, B. Zhao, H. F. Ibrahim, Dipangkar Dutta, E. Chudakov, S. S. Stepanyan, Mustafa Canan, Kalyan Allada, Abdurahim Rakhman, Yong Zhang, Vladimir Nelyubin, M. M. Dalton, and S. Riordan
Subjects: Physics, Nuclear and High Energy Physics, Range (particle radiation), Proton, media_common.quotation_subject, Nuclear Theory, Hadron, High Energy Physics::Phenomenology, FOS: Physical sciences, Asymmetry, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pion, Neutron, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment, Electron scattering, Spin-½, media_common
Abstract: We report the first measurement of target single-spin asymmetries (A$_N$) in the inclusive hadron production reaction, $e~$+$~^3\text{He}^{\uparrow}\rightarrow h+X$, using a transversely polarized $^3$He target. The experiment was conducted at Jefferson Lab in Hall A using a 5.9-GeV electron beam. Three types of hadrons ($\pi^{\pm}$, $\text{K}^{\pm}$ and proton) were detected in the transverse hadron momentum range 0.54 $, Comment: Updated version, submitted to Phys. Rev. C
Published: 2013
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16. Measurement of the Parity-Violating Asymmetry in Electron-Deuteron Scattering in the Nucleon Resonance Region

Author: M. Friend, B. P. Quinn, S. Frullani, K. Hafidi, J. G. Rubin, A. V. Glamazdin, P. E. Reimer, E. Cisbani, Douglas Higinbotham, S. Kowalski, D. McNulty, Arijit Saha, Nilanga Liyanage, Bogdan Wojtsekhowski, J. P. Chen, C. E. Hyde, B. Zhao, A. Deur, Paul Souder, Vladimir Nelyubin, Nuruzzaman, A. Shahinyan, X. Zheng, E. Long, D. S. Armstrong, Wouter Deconinck, J. Huang, K. Pan, G. M. Urciuoli, K. E. Myers, G. D. Cates, Jongmin Lee, Kent Paschke, A. Giusa, Olfred Hansen, G.V. Russo, John Arrington, K. S. Kumar, A. Camsonne, S. Golge, R. Subedi, R. S. Beminiwattha, Abdurahim Rakhman, Diana Parno, G. B. Franklin, Vincent Sulkosky, Fatiha Benmokhtar, S. K. Nanda, Yujie Qiang, B. Sawatzky, D. Wang, N. Muangma, S. K. Phillips, Z. Ahmed, R. Silwal, Young Do Oh, R. J. Holt, M. M. Dalton, J. J. LeRose, B. Waidyawansa, Xin Qian, R. Holmes, M. Mihovilovic, S. Riordan, L. Mercado, P. M. King, Franco Meddi, Z. E. Meziani, Jay Benesch, Kiadtisak Saenboonruang, D. G. Meekins, H. Kang, C. M. Sutera, X. Deng, D. Flay, K. Rider, Mustafa Canan, Kalyan Allada, C. W. de Jager, K. A. Aniol, C. M. Jen, L. El Fassi, C. Dutta, R. De Leo, William A. Tobias, D. C. Jones, E. Chudakov, R. Michaels, Amrendra Narayan, T. Holmstrom, J. Roche, V. Bellini, Simon Širca, F. Garibaldi, R. Suleiman, K. Grimm, D. J. Margaziotis, and L. Ye
Subjects: Physics, Quark, Particle physics, Scattering, media_common.quotation_subject, Nuclear Theory, Electroweak interaction, Hadron, High Energy Physics::Phenomenology, General Physics and Astronomy, FOS: Physical sciences, Inelastic scattering, Asymmetry, Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nucleon, Nuclear Experiment, Electron scattering, media_common
Abstract: We report on parity-violating asymmetries in the nucleon resonance region measured using $5 - 6$ GeV longitudinally polarized electrons scattering off an unpolarized deuterium target. These results are the first parity-violating asymmetry data in the resonance region beyond the $\Delta(1232)$, and provide a verification of quark-hadron duality in the nucleon electroweak $\gamma Z$ interference structure functions at the (10-15)% level. The results are of particular interest to models relevant for calculating the $\gamma Z$ box-diagram corrections to elastic parity-violating electron scattering measurements., Comment: 7 pages, 1 figure, to appear in Phys. Rev. Lett
Published: 2013
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17. Measurement of the 12C(e,e'p)11B Two-Body Breakup Reaction at High Missing Momentum Values

Author: J. P. Chen, A. Shahinyan, G. M. Urciuoli, G. Rosner, Joerg Reinhold, R. Igarashi, Nilanga Liyanage, Olivier Gayou, Simon Širca, F. Garibaldi, B. Craver, O. Glamazdin, Olfred Hansen, J. R. M. Annand, Y. Jiang, C. F. Perdrisat, H. Yao, E. Piasetzky, William Bertozzi, P. Monaghan, B. D. Anderson, M. Mazouz, Pete Markowitz, Guy Ron, Wim Cosyn, C. Ciofi degli Atti, R. A. Lindgren, J. J. LeRose, L. Y. Zhu, L. J. Kaufman, V. Sulkosky, Jan Ryckebusch, X. Zheng, G. J. Kumbartzki, H. Morita, X. Jiang, Bogdan Wojtsekhowski, Shalev Gilad, S. K. Nanda, Yujie Qiang, D. J. Margaziotis, J. Gomez, C. W. de Jager, R. Shneor, W. U. Boeglin, A. Kelleher, R. Subedi, K. A. Aniol, J. W. Watson, A. Saha, B. Reitz, Bryan J. Moffit, B. Sawatzky, E. Kuchina, Larry Weinstein, J. Segal, E. Cisbani, Karl Slifer, R. Michaels, V. A. Punjabi, S. A. Wood, T. Holmstrom, D. G. Meekins, R. J. Feuerbach, M. Potokar, P. E. Ulmer, J. Arrington, H. Benaoum, H. F. Ibrahim, E. Voutier, N. Thompson, E. Chudakov, P.Y. Bertin, P. Solvignon, Fatiha Benmokhtar, A. Kolarkar, Douglas Higinbotham, E. Jans, K. Wang, S. Marrone, Seonho Choi, Ronald Gilman, E. Folts, S. Frullani, Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)
Subjects: Scattering cross-section, Physics, Nuclear and High Energy Physics, Momentum (technical analysis), Theoretical models, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Breakup, Nuclear physics, Distribution (mathematics), Range (statistics), Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract: The five-fold differential cross section for the 12C(e,e'p)11B reaction was determined over a missing momentum range of 200-400 MeV/c, in a kinematics regime with Bjorken x > 1 and Q2 = 2.0 (GeV/c)2. A comparison of the results and theoretical models and previous lower missing momentum data is shown. The theoretical calculations agree well with the data up to a missing momentum value of 325 MeV/c and then diverge for larger missing momenta. The extracted distorted momentum distribution is shown to be consistent with previous data and extends the range of available data up to 400 MeV/c., 12 pages, 1 table and 3 figures for submission to Journal Physics G
Published: 2013
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18. Calibration of the polarimeter POMME at proton energies between 1.05 and 2.4 GeV

Author: Alain Boudard, M. Boivin, W. T. H. van Oers, S. Belostotsky, I.M. Sitnik, S. K. Nanda, J. Oh, E. A. Strokovsky, R. Beurtey, V. P. Ladygin, N.M. Piskunov, N.E. Cheung, W. W. Jacobs, R. Abegg, L. Penchev, E. Warde, E. Tomasi-Gustafsson, F. Plouin, R. Frascaria, C. F. Perdrisat, B. Johnson, V. V. Vikhrov, V. A. Punjabi, C. Lippert, J. Yonnet, K. Beard, and R. Siebert
Subjects: Physics, Nuclear and High Energy Physics, Range (particle radiation), Proton, Particle accelerator, Polarimeter, law.invention, Power (physics), Nuclear physics, law, Calibration, Empirical formula, Nuclear Experiment, Instrumentation, Energy (signal processing)
Abstract: We report a new calibration of the polarimeter POMME for energies between 1.05 and 2.40 GeV using polarized proton beams at the Laboratoire National Saturne. A 16 parameter and a new 14 parameter empirical formula have been used to fit both the angular and energy dependencies of the inclusive proton-carbon analyzing power data between 0.80 and 2.40 GeV. Both fits have very good chi-square, 1.20 per degree of freedom for the former, and 1.05 for the latter. The parameters from these fits can be used to predict the angular distribution of the pC analyzing power at any energy within the energy range of the fits.
Published: 1995
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19. Virtual Compton scattering and the generalized polarizabilities of the proton atQ2=0.92and 1.76 GeV2

Author: L. B. Auerbach, C. Cavata, D. J. Margaziotis, K. Kino, A. J. Sarty, Seigo Kato, J. A. Templon, B. Frois, Ronald Ransome, D. Rowntree, R. W. Lourie, Christophe Furget, P. Grenier, M. K. Jones, D. S. Dale, G. W. Miller, H. Voskanyan, C. Jutier, S. Frullani, Z. L. Zhou, C. R. Howell, W. Kahl, M. Khayat, A. T. Katramatou, M. Kuss, J. W. Watson, K. Wijesooriya, W. M. Zhang, J. Jardillier, G.I. Smirnov, David L. Prout, G. Laveissière, A. Deur, G. E. Dodge, J. R. Calarco, G. Fournier, N. Degrande, R. A. Lindgren, J. J. LeRose, R. I. Pomatsalyuk, E. J. Brash, W. U. Boeglin, V. Gorbenko, R. Suleiman, F. T. Baker, S. Platchkov, G. M. Huber, F. Garibaldi, Ronald Gilman, K. McCormick, G. Rutledge, T. Saito, Richard Madey, G. G. Petratos, Z. E. Meziani, K. Arundell, Marc Vanderhaeghen, J. Martino, James J. Kelly, S. Kox, J. Marroncle, L. Cardman, C. E. Hyde, Raphael Noel Tieulent, Z. Papandreou, Pierre A.M. Guichon, F. Merchez, Bogdan Wojtsekhowski, D. Marchand, E. Tomasi-Gustaffson, M. Liang, P. M. Rutt, F. Renard, Shalev Gilad, S. Mehrabyan, G. Quéméner, V. A. Punjabi, D. M. Manley, C. W. de Jager, R. L.J. van der Meer, K. A. Aniol, Nilanga Liyanage, A. Gasparian, B. D. Anderson, G. J. Lolos, M. B. Epstein, Richard Wilson, Branislav Vlahovic, L. C. Alexa, A. Ketikyan, P. E. Ulmer, A. V. Glamazdin, E. A.J.M. Offermann, Jing Zhao, P. Y. Bertin, L. Van Hoorebeke, T. Pussieux, Mauro Iodice, Larry Weinstein, Laird Kramer, T. Terasawa, Vincent Breton, J. Gao, C. F. Perdrisat, C. Marchand, D. Neyret, William Bertozzi, R. Michaels, R. Holmes, H. Fonvieille, D. G. Zainea, Charles Glashausser, C. C. Chang, K. S. Kumar, J. Domingo, Pavel Sorokin, Haiyan Gao, Pete Markowitz, L. Bimbot, R. Di Salvo, J. M. Finn, J. S. Real, Justin I. McIntyre, S. Jaminion, G. Kumbartzki, E. Chudakov, Barbara Pasquini, Latifa Elouadrhiri, N. d'Hose, Roberto Perrino, R. De Leo, M. Baylac, J. O. Hansen, J. P. Chen, R. Van de Vyver, G. M. Urciuoli, J. Berthot, H. Breuer, Kevin Fissum, L. A. Ewell, G. Audit, Kazushige Maeda, J. Mougey, O. Ravel, S. Malov, E. Burtin, M. Holtrop, J. Gomez, Thomas E. Smith, Paul Souder, H. Ueno, S. K. Nanda, Hiroaki Tsubota, S. Kerhoas, L. Todor, A. Leone, A. Saha, E. Voutier, K. Soldi, A. Serdarevic, Sebastien Incerti, Y. Roblin, P. Vernin, and E. Cisbani
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Photon, Chiral perturbation theory, Proton, 010308 nuclear & particles physics, Structure function, Compton scattering, 01 natural sciences, Nuclear physics, Amplitude, Dispersion relation, 0103 physical sciences, Beta (velocity), 010306 general physics
Abstract: Virtual Compton Scattering (VCS) on the proton has been studied at Jefferson Lab using the exclusive photon electroproduction reaction (e p --> e p gamma). This paper gives a detailed account of the analysis which has led to the determination of the structure functions P{sub LL}-P{sub TT}/epsilon and P{sub LT}, and the electric and magnetic generalized polarizabilities (GPs) alpha{sub E}(Q{sup 2}) and beta{sub M}(Q{sup 2}) at values of the four-momentum transfer squared Q{sup 2} = 0.92 and 1.76 GeV{sup 2}. These data, together with the results of VCS experiments at lower momenta, help building a coherent picture of the electric and magnetic GPs of the proton over the full measured Q{sup 2}-range, and point to their non-trivial behavior.
Published: 2012
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20. Final analysis of proton form factor ratio data atQ2=4.0, 4.8, and 5.6 GeV2

Author: C. Cavata, T. Averett, J. R. Calarco, R. Endres, S. Kozlov, J. P. Chen, Kevin Fissum, C. C. Chang, I. Sitnik, Shalev Gilad, C. W. de Jager, A. V. Glamazdin, Z. Chai, K. A. Aniol, K. Wijesooriya, G. M. Urciuoli, E. Tomasi-Gustafsson, D. J. Margaziotis, X. Jiang, Douglas Higinbotham, M. K. Jones, N. M. Piskunov, Bogdan Wojtsekhowski, Fatiha Benmokhtar, R. Michaels, T. Chang, Charles Glashausser, Stephanie Escoffier, C. F. Perdrisat, L. Bimbot, C. Salgado, Mauro Iodice, L. Todor, R. A. Lindgren, J. J. LeRose, G. J. Lolos, M. B. Epstein, H. Voskanyan, K. Kramer, F. Marie, V. A. Punjabi, William Bertozzi, Brian Raue, Pete Markowitz, M. Rvachev, M. Khandaker, R. De Leo, D. Neyret, S. Frullani, Olivier Gayou, J. Gomez, Ronald Gilman, S. Strauch, E. Chudakov, J. O. Hansen, G. J. Kumbartzki, H. Fonvieille, B. D. Milbrath, E. J. Brash, K. McCormick, R. Roche, J. Gao, Simon Širca, G. M. Huber, F. Garibaldi, S. K. Nanda, Andrew Puckett, Sonja Dieterich, X. Zheng, D. Lhuillier, Nilanga Liyanage, L. Zhu, L. Pentchev, and Ronald Ransome
Subjects: Quark, Physics, Nuclear physics, Nuclear and High Energy Physics, Angular momentum, 010308 nuclear & particles physics, 0103 physical sciences, Momentum transfer, 010306 general physics, Nucleon, Polarization (waves), 01 natural sciences
Abstract: Precise measurements of the proton electromagnetic form factor ratio R = mu(p)G(E)(p)/G(M)(p) using the polarization transfer method at Jefferson Lab have revolutionized the understanding of nucleon structure by revealing the strong decrease of R with momentum transfer Q(2) for Q(2) greater than or similar to 1 GeV2, in strong disagreement with previous extractions of R from cross-section measurements. In particular, the polarization transfer results have exposed the limits of applicability of the one-photon-exchange approximation and highlighted the role of quark orbital angular momentum in the nucleon structure. The GEp-II experiment in Jefferson Lab's Hall A measured R at four Q(2) values in the range 3.5 GeV2
Published: 2012
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21. Beam-Target Double-Spin AsymmetryALTin Charged Pion Production from Deep Inelastic Scattering on a Transversely PolarizedHe3Target at1.4<Q2<2.7 GeV2

Author: Jen-Chieh Peng, Wolfgang Korsch, L. Yuan, L. G. Tang, Nilanga Liyanage, K. Chirapatpimol, S. K. Nanda, Yujie Qiang, A. Shahinyan, Z. E. Meziani, H. J. Lu, X. Yan, Salvatore Frullani, Y. Li, D. J. Margaziotis, E. Cisbani, R. A. Lindgren, J. J. LeRose, A. Deur, L. Guo, E. Long, B. Zhao, X. Zhan, Ronald Gilman, I. Vilardi, H. Ding, Wouter Deconinck, A. Kelleher, G. Jin, R. Subedi, Diana Parno, X. Zheng, Bogdan Wojtsekhowski, Ronald Ransome, P. Bosted, Z. Ye, B. E. Norum, Xin Qian, Y. Zhang, W. Kim, Franco Garibaldi, B. Sawatzky, P. A. M. Dolph, Simon Širca, R. Michaels, J. C. Cornejo, C. Dutta, W. Chen, Douglas Higinbotham, M. K. Jones, B. Moffit, A. Camsonne, F. Cusanno, Vincent Sulkosky, X. Zong, A. J. R. Puckett, L. El Fassi, Xiaofeng Zhu, S. Golge, X. Li, C. Muñoz Camacho, K. Wang, Yingxiao Wang, M. Huang, G. D. Cates, M. Posik, Shalev Gilad, C. W. de Jager, X. Jiang, K. A. Aniol, M. H. Shabestari, M. Osipenko, Mauro Iodice, Y. X. Ye, William Bertozzi, H. F. Ibrahim, S. Marrone, Amrendra Narayan, Joseph M. Katich, D. Gaskell, David Hamilton, Pete Markowitz, Dipangkar Dutta, X. Deng, R. De Leo, J. P. Chen, S. S. Stepanyan, Mustafa Canan, Chen Chen, Kalyan Allada, T. Holmstrom, D. McNulty, E. Chudakov, T. Averett, J. Huang, G. M. Urciuoli, Young Do Oh, A. Tobias, Fatiha Benmokhtar, Abdurahim Rakhman, A. Kolarkar, M. M. Dalton, S. Riordan, A. Saha, Yong Zhang, Vladimir Nelyubin, Haiyan Gao, P. C. Bradshaw, S. K. Phillips, O. Glamazdin, Olfred Hansen, J. R. M. Annand, L. Y. Zhu, E. Schulte, and H. Yao
Subjects: Quark, Physics, Particle physics, 010308 nuclear & particles physics, Scattering, media_common.quotation_subject, General Physics and Astronomy, Parton, Electron, Deep inelastic scattering, 01 natural sciences, Asymmetry, Nuclear physics, Pion, 0103 physical sciences, High Energy Physics::Experiment, Neutron, Nuclear Experiment, 010306 general physics, media_common
Abstract: We report the first measurement of the double-spin asymmetry A_(LT) for charged pion electroproduction in semi-inclusive deep-inelastic electron scattering on a transversely polarized ^3He target. The kinematics focused on the valence quark region, 0.16
Published: 2012
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22. Single Spin Asymmetries in Charged Pion Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely PolarizedHe3Target atQ2=1.4–2.7 GeV2

Author: A. Kolarkar, M. Huang, X. Jiang, C. Dutta, M. Osipenko, T. Averett, H. Yao, W. Chen, Abdurahim Rakhman, L. G. Tang, Bogdan Wojtsekhowski, Y. X. Ye, X. Zhan, X. Yan, O. Glamazdin, Olfred Hansen, J. R. M. Annand, Fatiha Benmokhtar, D. McNulty, Arijit Saha, Diana Parno, W. Kim, Nilanga Liyanage, Wouter Deconinck, R. Subedi, D. J. Margaziotis, Salvatore Frullani, Chunhui Chen, P. Bosted, Yingxiao Wang, Yong Zhang, Shalev Gilad, Vladimir Nelyubin, Wolfgang Korsch, M. M. Dalton, Yuxiang Zhao, E. Cisbani, C. W. de Jager, K. A. Aniol, L. Guo, S. Riordan, E. Long, L. Y. Zhu, M. H. Shabestari, A. Kelleher, X. Li, S. K. Phillips, Mauro Iodice, E. Schulte, J. P. Chen, X. Deng, A. Shahinyan, G. Jin, X. Zheng, J. Huang, G. M. Urciuoli, S. K. Nanda, P. A. M. Dolph, Yujie Qiang, J. C. Cornejo, A. Tobias, William Bertozzi, S. Marrone, David Hamilton, Pete Markowitz, R. De Leo, Franco Garibaldi, Simon Širca, Ronald Ransome, S. S. Stepanyan, Xin Qian, Mustafa Canan, Kalyan Allada, B. Moffit, L. El Fassi, Xiaofeng Zhu, Z. E. Meziani, R. A. Lindgren, J. J. LeRose, I. Vilardi, H. Ding, B. Sawatzky, G. D. Cates, A. Camsonne, Vincent Sulkosky, Y. Li, X. Zong, R. Michaels, H. F. Ibrahim, C. Muñoz Camacho, Dipangkar Dutta, B. Zhao, A. J. R. Puckett, Haiyan Gao, E. Chudakov, T. Holmstrom, Young Do Oh, F. Cusanno, Douglas Higinbotham, M. K. Jones, A. Deur, M. Posik, P. C. Bradshaw, K. Wang, H. J. Lu, Jen-Chieh Peng, Ronald Gilman, L. Yuan, K. Chirapatpimol, Z. Ye, B. E. Norum, Y. Zhang, Amrendra Narayan, Joseph M. Katich, D. Gaskell, and S. Golge
Subjects: Physics, Particle physics, Proton, 010308 nuclear & particles physics, Hadron, General Physics and Astronomy, Inelastic scattering, Deep inelastic scattering, 01 natural sciences, Baryon, Nuclear physics, Pion, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Nucleon, Lepton
Abstract: We report the first measurement of target single spin asymmetries in the semi-inclusive ^3He(e,e^′π^±)X reaction on a transversely polarized target. The experiment, conducted at Jefferson Lab using a 5.9 GeV electron beam, covers a range of 0.16
Published: 2011
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23. Cross sections and Rosenbluth separations inH1(e,e′K+)Λup toQ2=2.35 GeV2

Author: D. J. Margaziotis, John C. Mitchell, W. Hinton, A. Camsonne, C. C. Chang, S. A. Wood, L. G. Tang, S. Marrone, Kevin Fissum, Paul Gueye, H. Ueno, B. Hu, Salvatore Frullani, Douglas Higinbotham, M. K. Jones, K. Wijesooriya, K. Wang, L. Cole, J. Reinhold, M. Coman, K. Kozlov, K. Kanda, S. K. Nanda, M. Palomba, R. Roche, P. G. Roos, P. E. Ulmer, J. Gomez, W. U. Boeglin, Friedrich Klein, Nilanga Liyanage, L. Lagamba, Y. Sato, A. Uzzle, L. Zhu, Brian Raue, Mauro Iodice, J. J. LeRose, S. Širca, T. Miyoshi, Antonin Vacheret, C. E. Keppel, Bogdan Wojtsekhowski, Pete Markowitz, Franco Garibaldi, P. King, G. M. Huber, T. Horn, R. Michaels, Sonja Dieterich, F. Dohrmann, O. Filoti, R. De Leo, Dipanwita Dutta, C. F. Perdrisat, M. Sotona, J. Cha, J. P. Chen, F. Gilman, G. M. Urciuoli, A. Saha, Olivier Gayou, E. Chudakov, Laird Kramer, J. O. Hansen, E. Cisbani, P. Bydžovský, K. McCormick, X. Zheng, Rolf Ent, C. Jackson, V. Pattichio, K. Baker, A. J. Sarty, F. Cusanno, A. Deur, C. W. de Jager, K. A. Aniol, K. Kramer, H. Breuer, V. A. Punjabi, N. S. Chant, B. Reitz, E. Piasetzky, X. Jiang, and I. Yaron
Subjects: Nuclear reaction, Physics, Nuclear and High Energy Physics, Particle physics, Meson, Hadron, Momentum transfer, Lambda baryon, Lambda, Nuclear physics, Photon polarization, High Energy Physics::Experiment, Nuclear cross section, Nuclear Experiment
Abstract: The kaon electroproduction reaction 1H(e,e'K+)Lambda was studied as a function of the virtual-photon four-momentum, Q2, total energy, W, and momentum transfer, t, for different values of the virtual- photon polarization parameter. Data were taken at electron beam energies ranging from 3.40 to 5.75 GeV. The center of mass cross section was determined for 21 kinematics corresponding to Q2 of 1.90 and 2.35 GeV2 and the longitudinal, sigmaL, and transverse, sigmaT , cross sections were separated using the Rosenbluth technique at fixed W and t. The separated cross sections reveal a flat energy dependence at forward kaon angles not satisfactorily described by existing electroproduction models. Influence of the kaon pole on the cross sections was investigated by adopting an off-shell form factor in the Regge model which better describes the observed energy dependence of sigmaT and sigmaL.
Published: 2010
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24. Polarization transfer in at 2.1 GeV

Author: S. K. Nanda, R. Siebert, E. Cheung, V. A. Punjabi, K. Beard, E. Warde, R. Beurtey, M. Boivin, C. Lippert, W. W. Jacobs, P.C. Gugelot, R. Abegg, F. Plouin, J. Yonnet, R. Frascaria, C. F. Perdrisat, and W. T. H. van Oers
Subjects: Baryon, Nuclear physics, Nuclear reaction, Physics, Nuclear and High Energy Physics, Deuterium, Proton, Hadron, Elementary particle, Nucleon, Polarization (waves)
Abstract: The polarization of the proton from the inclusive breakup reaction 1 H( d , p )X at 2.1 GeV was measured at 0°. The results are expressed as the ratio of the proton polarization, P p , to the deuteron beam polarization, P d , κ 0 = P p / P d . The measured values of κ 0 range from +0.983 to -0.305 and are in general agreement with the expected behavior arising from the D state in the deuteron wave function.
Published: 1992
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25. Virtual Compton Scattering and Neutral Pion Electroproduction in the Resonance Region up to the Deep Inelastic Region at Backward Angles

Author: Seigo Kato, H. Ueno, K. Wijesooriya, R. Di Salvo, L. C. Alexa, G. W. Miller, H. Voskanyan, C. Jutier, J. Jardillier, E. Voutier, J. A. Templon, G. Rutledge, B. Frois, D. G. Zainea, C. C. Chang, E. Chudakov, David L. Prout, G. Laveissière, T. Terasawa, Vincent Breton, Mauro Iodice, Bogdan Wojtsekhowski, K. S. Kumar, Latifa Elouadrhiri, J. O. Hansen, A. Gasparian, K. Arundell, Pavel Sorokin, Sebastien Incerti, Larry Weinstein, P. Grenier, R. W. Lourie, W. Kahl, J. Berthot, G. Audit, L. B. Auerbach, T. Pussieux, G. Fournier, William Bertozzi, A. Deur, P. Vernin, Pierre A.M. Guichon, Ronald Ransome, Kazushige Maeda, K. Kino, N. Degrande, Pete Markowitz, D. Rowntree, Z. Papandreou, R. L.J. van der Meer, A. T. Katramatou, T. Saito, Richard Madey, Paul Souder, P. M. Rutt, S. K. Nanda, Roberto Perrino, R. De Leo, D. S. Dale, S. Mehrabyan, S. Kerhoas, J. M. Finn, W. U. Boeglin, D. J. Margaziotis, R. I. Pomatsalyuk, A. Ketikyan, L. Todor, A. Leone, M. Baylac, S. Jaminion, Nilanga Liyanage, S. Malov, E. Burtin, M. Holtrop, Thomas E. Smith, Richard Wilson, G. E. Dodge, R. Holmes, J. Marroncle, D. Marchand, E. Tomasi-Gustaffson, S. Platchkov, J. S. Real, J. Martino, Raphael Noel Tieulent, G.I. Smirnov, J. P. Chen, R. Van de Vyver, G. M. Urciuoli, Branislav Vlahovic, R. A. Lindgren, J. J. LeRose, C. R. Howell, Justin I. McIntyre, J. R. Calarco, L. Tiator, L. Bimbot, Arijit Saha, K. Soldi, O. Ravel, Hiroaki Tsubota, A. Serdarevic, C. E. Hyde, Y. Roblin, J. Y. Mougey, G. M. Huber, F. Garibaldi, E. Cisbani, J. Gomez, V. Gorbenko, J. W. Watson, F. Renard, L. Cardman, B. D. Anderson, G. J. Lolos, M. B. Epstein, F. T. Baker, F. Merchez, P. Y. Bertin, Haiyan Gao, M. Liang, G. Quéméner, D. Neyret, N. d'Hose, S. Frullani, Charles Glashausser, M. Khayat, H. Breuer, D. M. Manley, J. Gao, L. Van Hoorebeke, G. G. Petratos, Z. E. Meziani, V. A. Punjabi, L. A. Ewell, Ronald Gilman, K. McCormick, H. Fonvieille, Z. L. Zhou, A. V. Glamazdin, S. Kox, Jing Zhao, C. F. Perdrisat, R. Michaels, C. Marchand, M. K. Jones, C. Furget, P. E. Ulmer, Kevin Fissum, M. Kuss, James J. Kelly, E. J. Brash, Laird Kramer, Shalev Gilad, C. W. de Jager, K. A. Aniol, E. A.J.M. Offermann, C. Cavata, S.S. Kamalov, G. J. Kumbartzki, A. J. Sarty, W. M. Zhang, R. Suleiman, J. Domingo, Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), HALL A, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)
Subjects: Elastic scattering, Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Scattering, Compton scattering, Resonance, FOS: Physical sciences, Inelastic scattering, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Deep inelastic scattering, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pion, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment (nucl-ex), 010306 general physics, Nucleon, Nuclear Experiment
Abstract: We have made the first measurements of the virtual Compton scattering (VCS) process via the H$(e,e'p)\gamma$ exclusive reaction in the nucleon resonance region, at backward angles. Results are presented for the $W$-dependence at fixed $Q^2=1$ GeV$^2$, and for the $Q^2$-dependence at fixed $W$ near 1.5 GeV. The VCS data show resonant structures in the first and second resonance regions. The observed $Q^2$-dependence is smooth. The measured ratio of H$(e,e'p)\gamma$ to H$(e,e'p)\pi^0$ cross sections emphasizes the different sensitivity of these two reactions to the various nucleon resonances. Finally, when compared to Real Compton Scattering (RCS) at high energy and large angles, our VCS data at the highest $W$ (1.8-1.9 GeV) show a striking $Q^2$- independence, which may suggest a transition to a perturbative scattering mechanism at the quark level., Comment: 20 pages, 8 figures. To appear in Phys.Rev.C
Published: 2009
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26. Investigation of Proton-Proton Short-Range Correlations via theC12(e,e′pp)Reaction

Author: Yujie Qiang, Eli Piasetzky, P. Monaghan, William Bertozzi, B. Craver, H. Benaoum, H. F. Ibrahim, Pete Markowitz, N. Thompson, A. Shahinyan, B. D. Anderson, G. J. Kumbartzki, Bogdan Wojtsekhowski, G. Rosner, E. Chudakov, B. Sawatzky, H. Yao, J. O. Hansen, V. Sulkosky, P.Y. Bertin, R. Michaels, O. Glamazdin, John Arrington, L. Zhu, J. P. Chen, S. Frullani, J. Gomez, G. M. Urciuoli, Simon Širca, F. Garibaldi, A. Saha, P. Solvignon, A. Kelleher, L. J. Kaufman, S. A. Wood, T. Holmstrom, J. Reinhold, Olivier Gayou, Jrm Annand, D. J. Margaziotis, Guy Ron, S. Marrone, Shalev Gilad, R. Shneor, Larry Weinstein, P. E. Ulmer, Karl Slifer, A. Kolarkar, C. W. de Jager, M. Potokar, K. A. Aniol, E. Cisbani, E. Kuchina, R. J. Feuerbach, R. A. Lindgren, J. J. LeRose, J. W. Watson, Bryan J. Moffit, X. Zheng, V. A. Punjabi, D. G. Meekins, Fatiha Benmokhtar, R. Subedi, E. Voutier, C. F. Perdrisat, W. U. Boeglin, R. Igarashi, Nilanga Liyanage, Y. Jiang, Douglas Higinbotham, E. Jans, K. Wang, Seonho Choi, Ronald Gilman, B. Reitz, M. Mazouz, X. Jiang, and S. K. Nanda
Subjects: Nuclear reaction, Physics, Proton, 010308 nuclear & particles physics, Nuclear Theory, Hadron, Strong interaction, General Physics and Astronomy, 01 natural sciences, Baryon, Momentum, Nuclear physics, 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon, Lepton
Abstract: In this work we present a simultaneous measurement of the 12C(e,e'p) and 12C(e,e'pp) reactions. This measurement was done as part of the E01-015 experiment at Hall A of Jefferson Lab, at Q2 = 2 (GeV/c) 2 , xB = 1.2, for an (e,e'p) missing-momentum range from 300 to 600 MeV/c. At these kinematics conditions, with a missing-momentum greater than the Fermi momentum of nucleons in a nucleus and far from the D excitation, nucleon-nucleon Short-Range Correlations (SRCs) are predicted to dominate the reaction. For 9.5 ± 2% of the 12C(e,e2p) events, a recoiling partner proton was observed in the opposite direction to the 12C(e,e2p) missing momentum vector with roughly equal momentum. This observation is an experimental signature for proton-proton short-range correlations (pp-SRC) in nuclei. Even though the probability of pp-SRCs in nuclei is small, they are important since they can teach us about the strong interaction at short distances. Moreover, as a manifestation of asymmetric
Published: 2007
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27. High Resolution Spectroscopy ofBΛ12by Electroproduction

Author: G. M. Urciuoli, D. J. Margaziotis, P.Y. Bertin, S. Colilli, Y. Okasyasu, L. Lagamba, P. Monaghan, G. de Cataldo, Pavlo Baturin, B. Craver, E. Piasetzky, C. Zorn, M. Gricia, H. Breuer, D. J. Millener, J. Gomez, K. Kino, P. Bydžovský, Z. E. Meziani, E. Cisbani, H. Ueno, T. Miyoshi, R. Michaels, Brian Raue, L. Coman, P. E. Reimer, P. E. Ulmer, V. Nelyubin, B. Reitz, P. Brindza, H. Benaoum, H. F. Ibrahim, M. Iodice, C. Munoz Camacho, E. Folts, Olivier Gayou, R. A. Lindgren, J. J. LeRose, Kent Paschke, R. Snyder, S. Marrone, R. J. Feuerbach, B. E. Norum, P. Veneroni, R. Roche, A. Shahinyan, V. A. Punjabi, A. Acha, C. W. de Jager, E. Chudakov, Bogdan Wojtsekhowski, K. A. Aniol, Bryan J. Moffit, W. U. Boeglin, V. Sulkosky, P. Ambrozewicz, J. O. Hansen, V. M. Rodriguez, F. Giulani, A. Saha, Tohru Suzuki, X. Jiang, C. Ferdi, K. I. Blomqvist, Maryam Moteabbed, T. Holmstrom, Franco Garibaldi, Y. X. Ye, C. C. Chang, R. Subedi, R. Fratoni, Simon Širca, C. F. Perdrisat, Pete Markowitz, R. De Leo, Salvatore Frullani, A. J. Sarty, L. J. Kaufman, F. Cusanno, Jaideep Singh, A. Deur, F. Santavenere, Seonho Choi, J. Segal, K. McCormick, A. Camsonne, Douglas Higinbotham, E. Voutier, S. Zhou, P. Solvignon, M. Sotona, X. Zheng, Charles Hyde, S. K. Nanda, Yujie Qiang, Eugenio Nappi, D. Hayes, B. Kross, J. Reinhold, M. Lucentini, and J. P. Chen
Subjects: Physics, Superconductivity, 010308 nuclear & particles physics, Resolution (electron density), General Physics and Astronomy, Order (ring theory), Lambda, 01 natural sciences, Ring-imaging Cherenkov detector, Nuclear physics, Full width at half maximum, 0103 physical sciences, Nuclear Experiment, 010306 general physics, Spectroscopy, Energy (signal processing)
Abstract: An experiment measuring electroproduction of hypernuclei has been performed in Hall A at Jefferson Lab on a $^{12}$C target. In order to increase counting rates and provide unambiguous kaon identification two superconducting septum magnets and a Ring Imaging CHerenkov detector (RICH) were added to the Hall A standard equipment. An unprecedented energy resolution of less than 700 keV FWHM has been achieved. Thus, the observed \lam{12}{B} spectrum shows for the first time identifiable strength in the core-excited region between the ground-state {\it s}-wave $\Lambda$ peak and the 11 MeV {\it p}-wave $\Lambda$ peak.
Published: 2007
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28. Precision Measurements of the Nucleon Strange Form Factors atQ2∼0.1 GeV2

Author: S. K. Nanda, Yujie Qiang, V. Ziskin, R. Michaels, J. P. Chen, J. M. Finn, M. Stutzman, T. Averett, Z. E. Meziani, Nilanga Liyanage, L. Lagamba, P. M. King, G. M. Urciuoli, X. Jiang, R. I. Pomatsalyuk, John Arrington, Richard Wilson, J. Hansknecht, S. Kowalski, B. Craver, S. K. Phillips, Ronald Gilman, R. Holmes, D. J. Margaziotis, J. Barber, R. Snyder, D. Lhuillier, Kent Paschke, A. J. R. Puckett, S. Širca, J. Roche, A. Acha, R. Subedi, Pete Markowitz, R. De Leo, M. Poelker, C. W. de Jager, K. A. Aniol, Bryan J. Moffit, L. J. Kaufman, Douglas Higinbotham, F. Cusanno, A. Saha, T. Holmstrom, A. Kolarkar, M. Potokar, A. Deur, Lindsay Glesener, S. Zhou, R. A. Lindgren, Bogdan Wojtsekhowski, K. Wang, K. Otis, J. J. LeRose, V. Nelyubin, S. Frullani, Peter S. LaViolette, S. L. Bailey, B. Reitz, Jaideep Singh, H. Yao, E. Cisbani, Paul Souder, D. S. Armstrong, X. Zheng, K. Fuoti, Joseph M. Katich, F. Butaru, R. J. Feuerbach, P. Solvignon, A. Kelleher, V. Sulkosky, Xin Qian, Y. C. Chao, X. Zhan, J. Grames, A. Beck, E. Kuchina, B. Sawatzky, D. G. Meekins, K. S. Kumar, K. Grimm, A. Whitbeck, Y. X. Ye, P. Bosted, E. Burtin, William A. Tobias, P. Decowski, P. E. Ulmer, R. Suleiman, Y. Prok, S. Fuchs, G. D. Cates, P.Y. Bertin, H. Benaoum, H. F. Ibrahim, J. Benesch, E. Chudakov, J. O. Hansen, and Karl Slifer
Subjects: Quark, Elastic scattering, Physics, Particle physics, Strange quark, 010308 nuclear & particles physics, Hadron, General Physics and Astronomy, Elementary particle, Strangeness, 7. Clean energy, 01 natural sciences, Nuclear physics, Baryon, 0103 physical sciences, 010306 general physics, Nucleon
Abstract: We report new measurements of the parity-violating asymmetry A_PV in elastic scattering of 3 GeV electrons off hydrogen and 4He targets with ~6.0 degrees. The 4He result is A_PV = (+6.40 +/- 0.23 (stat) +/- 0.12 (syst)) x10^-6. The hydrogen result is A_PV = (-1.58 +/- 0.12 (stat) +/- 0.04 (syst)) x10^-6. These results significantly improve constraints on the electric and magnetic strange form factors G_E^s and G_M^s. We extract G_E^s = 0.002 +/- 0.014 +/- 0.007 at = 0.077 GeV^2, and G_E^s + 0.09 G_M^s = 0.007 +/- 0.011 +/- 0.006 at = 0.109 GeV^2, providing new limits on the role of strange quarks in the nucleon charge and magnetization distributions.
Published: 2007
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29. Compton Scattering Cross Section on the Proton at High Momentum Transfer

Author: K. S. Egiyan, Seonho Choi, L. Zhu, Branislav Vlahovic, L. Pentchev, J. Gomez, D. G. Meekins, Jrm Annand, Bogdan Wojtsekhowski, F. Sabatié, Ronald Gilman, K. McCormick, E. Piasetzky, C. E. Hyde, A. Camsonne, A. V. Glamazdin, P. Stoler, A. Ketikyan, C. W. de Jager, K. A. Aniol, V. Sulkosky, C. F. Perdrisat, Dipangkar Dutta, Kent Paschke, F. Garibaldi, A. Deur, J. P. Chen, G. Laveissière, A. Shahinyan, C. C. Chang, C. R. Howell, J. R. Calarco, P. Moussiegt, R. A. Lindgren, J. J. LeRose, Olivier Gayou, D. M. Nikolenko, R. Michaels, P. V. Degtyarenko, P. Bosted, V. H. Mamyan, Yu. V. Shestakov, Charles Glashausser, N. Savvinov, D. J. Margaziotis, X. Zheng, Anatoly Radyushkin, E. Chudakov, I. A. Rachek, M. Roedelbronn, T. Hunyady, K. Kramer, S. K. Nanda, Haiyan Gao, J. O. Hansen, B. E. Norum, Areg Danagoulian, P.Y. Bertin, R. Roche, V. A. Punjabi, Guy Ron, H. Xiang, L. Todor, S. Tajima, T. Chang, P. Solvignon, Z. E. Meziani, Karl Slifer, David Hamilton, Pete Markowitz, W. Hinton, G. J. Kumbartzki, Vladimir Nelyubin, M. Khandaker, Alan M. Nathan, D. Hayes, L. Bimbot, Larry Weinstein, R. I. Pomatsalyuk, Arijit Saha, S. Širca, T. Horn, Douglas Higinbotham, M. K. Jones, B. Reitz, H. Voskanyan, K. Wang, X. Jiang, V. P. Kubarovsky, Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), HALL A, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Quantum chromodynamics, Elastic scattering, Particle physics, Proton, 010308 nuclear & particles physics, Scattering, 13.60.Fz, 24.85.+p, Momentum transfer, Compton scattering, FOS: Physical sciences, General Physics and Astronomy, Perturbative QCD, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Cross section (physics), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment
Abstract: Cross-section values for Compton scattering on the proton were measured at 25 kinematic settings over the range s = 5-11 and -t = 2-7 GeV2 with statistical accuracy of a few percent. The scaling power for the s-dependence of the cross section at fixed center of mass angle was found to be 8.0 +/ 0.2, strongly inconsistent with the prediction of perturbative QCD. The observed cross-section values are in fair agreement with the calculations using the handbag mechanism, in which the external photons couple to a single quark., 5 pages, 5 figures
Published: 2007
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30. Recoil-proton polarization in high-energy deuteron photodisintegration with circularly polarized photons

Author: F. Garibaldi, K. McCormick, Arijit Saha, V. Sulkosky, David Gaskell, I. A. Qattan, L. J. Kaufman, R. Sheyor, S. K. Nanda, Bogdan Wojtsekhowski, Karl Slifer, Nilanga Liyanage, L. Lagamba, L. Zhu, K. Wijesooriya, Olfred Hansen, Dipangkar Dutta, P. Monaghan, C. W. de Jager, B. Reitz, R. Michaels, R. A. Lindgren, J. J. LeRose, C. Glashauser, E. R. Kinney, Z. E. Meziani, John Arrington, E. Chudakov, Bryan J. Moffit, Ronald Ransome, Douglas Higinbotham, M. K. Jones, P. Solvignon, P. E. Reimer, V. A. Punjabi, C. F. Perdrisat, K. Wang, E. Voutier, F. Cusanno, X. Jiang, Kent Paschke, Seonho Choi, A. Deur, Ronald Gilman, A. Camsonne, Fatiha Benmokhtar, Olivier Gayou, J. P. Chen, G. M. Urciuoli, David Hamilton, R. De Leo, D. Lhuillier, K. Kramer, R. J. Holt, E. Schulte, Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), HALL A, and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Quantum chromodynamics, Physics, Photon, Isovector, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], 010308 nuclear & particles physics, Nuclear Theory, General Physics and Astronomy, Photon energy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Polarization (waves), Two-body problem, 7. Clean energy, 01 natural sciences, Nuclear physics, Deuterium, Photodisintegration, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 25.20.-x, 24.70.+s, 24.85.+p, 25.10.+s, 010306 general physics, Nuclear Experiment
Abstract: 5 pages, 1 figure, submitted to Physical Review Letters - HALL A; We measured the angular dependence of the three recoil proton polarization components in two-body photodisintegration of the deuteron at a photon energy of 2 GeV. These new data provide a benchmark for calculations based on quantum chromodynamics. Two of the five existing models have made predictions of polarization observables. Both explain the longitudinal polarization transfer satisfactorily.. Transverse polarizations are not well described, but suggest isovector dominance.
Published: 2007
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31. Publisher's Note: Proton elastic form factor ratios toQ2=3.5GeV2by polarization transfer [Phys. Rev. C 71, 055202 (2005)]

Author: R. J. Woo, Justin I. McIntyre, K. Wijesooriya, M. Khayat, P.Y. Bertin, C. F. Perdrisat, E. A. J. M. Offermann, Riad Suleiman, Y. Roblin, X. Jiang, A. Gasparian, R. A. Lindgren, J. J. LeRose, L. S. Cardman, J. Berthot, S. Malov, P. Vernin, J. A. Templon, L. Bimbot, V. Gorbenko, B. Diederich, D. S. Brown, Bogdan Wojtsekhowski, L. Todor, S. K. Nanda, S. Churchwell, Z. L. Zhou, Richard Madey, M. K. Jones, N. M. Piskunov, Shalev Gilad, E. Chudakov, K. A. Aniol, D. S. Dale, H. Voskanyan, Nilanga Liyanage, Brian Raue, G. M. Huber, F. Garibaldi, T. Saito, George Dan Zainea, G. G. Petratos, M. Kuss, Laird Kramer, A. V. Glamazdin, Z. Chai, G. Rutledge, David L. Prout, G. J. Kumbartzki, E. Lakuriki, G. J. Lolos, M. B. Epstein, G. Laveissière, B. D. Milbrath, C. Glashausser, Mauro Iodice, Lubomir Pentchev, S. Frullani, J. Y. Mougey, R. Roche, R. Michaels, A. Deur, R. L. Meer, A. J. Sarty, J. P. Chen, C. W. Jager, M. Liang, G. Quéméner, Branislav Vlahovic, H. Fonvieille, Andre Fleck, G. M. Urciuoli, C. R. Howell, J. R. Calarco, C. C. Chang, E. J. Brash, A. Green, D. J. Margaziotis, William Bertozzi, T. Smith, Ronald Gilman, J. Gao, R. I. Pomatsalyuk, Pavel Sorokin, Pete Markowitz, P. E. Ulmer, Kevin Fissum, W. Kahl, R. De Leo, K. McCormick, W.U. Boeglin, S. Strauch, G. M. Gerstner, J.-O. Hansen, Z. Papandreou, A. Besson, P. M. Rutt, Ronald Ransome, J. Domingo, F. Xiong, A. Saha, S. Jaminion, E. Cisbani, F. T. Baker, V. A. Punjabi, Jonatan Piedra Gomez, R. Macri, James J. Kelly, L. A. Ewell, and K. Takahashi
Subjects: Physics, Elastic scattering, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Proton, 010308 nuclear & particles physics, 0103 physical sciences, 010306 general physics, Polarization (waves), 01 natural sciences, Typographical error
Abstract: This paper was published online on 20 May 2005 without several of the authors' corrections incorporated. Equation (13) has been replaced. The captions of Figs. 16--18 have also been replaced. Typographical errors on pages 4, 6, 14, 15, 18, 19, 22, and 24 have all been corrected. The paper has been corrected as of 8 June 2005. The text is correct in the printed version of the journal.
Published: 2005
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32. Proton elastic form factor ratios toQ2=3.5GeV2by polarization transfer

Author: R. I. Pomatsalyuk, A. V. Glamazdin, Z. Chai, K. Wijesooriya, H. Fonvieille, M. Liang, G. Quéméner, Salvatore Frullani, C. F. Perdrisat, A. Gasparian, C. R. Howell, J. R. Calarco, K. McCormick, A. Green, J. A. Templon, P. Vernin, D. J. Margaziotis, Bogdan Wojtsekhowski, J. Y. Mougey, J. Berthot, F. T. Baker, E. J. Brash, L. Todor, R. Roche, J. Gao, M. Khayat, P.Y. Bertin, G. G. Petratos, S. K. Nanda, A. Deur, Z. L. Zhou, A. J. Sarty, R. J. Woo, A. Saha, L. Cardman, S. Jaminion, W. Kahl, B. Diederich, P. E. Ulmer, Franco Garibaldi, K. Takahashi, T. Saito, R. A. Lindgren, J. J. LeRose, D. S. Brown, G. M. Huber, Y. Roblin, G. M. Gerstner, R. Suleiman, V. Gorbenko, X. Jiang, V. A. Punjabi, S. Strauch, M. B. Epstein, Z. Papandreou, A. Besson, S. Churchwell, Charles Glashausser, E. Chudakov, Shalev Gilad, G. Laveissière, R. Madey, William Bertozzi, D. S. Dale, C. W. de Jager, K. A. Aniol, J. O. Hansen, G. M. Urciuoli, G. Kumbartzki, E. A.J.M. Offermann, Andre Fleck, Pete Markowitz, G. J. Lolos, Jian-Ping Chen, H. Voskanyan, Brian Raue, R. De Leo, S. Malov, P. M. Rutt, R. L.J. van der Meer, R. Macri, C. C. Chang, David L. Prout, J. Gomez, Pavel Sorokin, L. Bimbot, T. P. Smith, G. Rutledge, E. Lakuriki, B. D. Milbrath, M. K. Jones, N. M. Piskunov, M. Kuss, Ronald Gilman, M. Iodice, L. A. Ewell, James J. Kelly, F. Xiong, L. Pentchev, Ronald Ransome, W. U. Boeglin, Nilanga Liyanage, Branislav Vlahovic, E. Cisbani, Laird Kramer, Justin I. McIntyre, J. Domingo, Kevin Fissum, George Dan Zainea, and R. Michaels
Subjects: Physics, Quark, Nuclear and High Energy Physics, Photon, Proton, 010308 nuclear & particles physics, Polarimeter, Electron, Polarization (waves), 01 natural sciences, Nuclear physics, Transverse plane, Magnetization, 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract: The ratio of the proton elastic electromagnetic form factors, GEp/GMp, was obtained by measuring Pt and P, the transverse and longitudinal recoil proton polarization components, respectively, for the elastic epepreaction in the four-momentum transfer squared range of 0.5 to 3.5 GeV2. In the single-photon exchange approximation, GEp/GMp is directly proportional to Pt/P. The simultaneous measurement of Pt and P in a polarimeter reduces systematic uncertainties. The results for GEp/GMp show a systematic decrease with increasing Q2, indicating for the first time a definite difference in the distribution of charge and magnetization in the proton. The data have been reanalyzed and their systematic uncertainties have become significantly smaller than those reported previously. (Less)
Published: 2005
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33. Dynamics of the quasielasticO16(e,e′p)reaction atQ2≈0.8(GeV∕c)2

Author: A. V. Glamazdin, E. A.J.M. Offermann, Seigo Kato, D. M. Manley, H. Fonvieille, R. Roche, S. Malov, P.Y. Bertin, E. Burtin, M. Holtrop, J. Gomez, Jing Zhao, Nilanga Liyanage, R. W. Lourie, R. Michaels, S. Jaminion, R. Holmes, T. Terasawa, Vincent Breton, D. J. Margaziotis, Branislav Vlahovic, H. Voskanyan, C. Jutier, W. Kahl, F. T. Baker, C. F. Perdrisat, Leonid Levchuk, J. M. Finn, R. I. Pomatsalyuk, V. A. Punjabi, K. Joo, David L. Prout, Olivier Ravel, H. Ueno, Bogdan Wojtsekhowski, K. McCormick, P. Vernin, P. E. Ulmer, S. K. Nanda, S. Kerhoas, J. Y. Mougey, L. B. Auerbach, A. Leone, T. Pussieux, L. S. Cardman, Y. Roblin, S. van Verst, R. A. Lindgren, J. J. LeRose, G. M. Huber, Z. Papandreou, J. A. Templon, F. Garibaldi, T. Saito, M. Khayat, Dimitri Debruyne, P. M. Rutt, V. Gorbenko, B. Frois, Kevin Fissum, D. Neyret, G. G. Petratos, A. Saha, Z. E. Meziani, B. Diederich, C. E. Hyde-Wright, G. Rutledge, L. Bimbot, James J. Kelly, K. Kino, M. Liang, Wolfgang Korsch, J. S. McCarthy, T. P. Smith, G. Quéméner, S. Platchkov, Mauro Iodice, Kazushige Maeda, L. Todor, K. Wijesooriya, Justin I. McIntyre, J. W. Watson, Larry Weinstein, J. Martino, C. R. Howell, Hiroaki Tsubota, J. P. Chen, J. R. Calarco, N. d'Hose, Jan Ryckebusch, Z. L. Zhou, G. M. Urciuoli, D. G. Zainea, Ronald Gilman, Ronald Ransome, R. L.J. van der Meer, C. C. Chang, D. Rowntree, K. S. Kumar, J. Gao, B. D. Anderson, G. J. Lolos, M. B. Epstein, Pavel Sorokin, Laird Kramer, G. J. Kumbartzki, G. Laveissière, M. K. Jones, A. Gasparian, R. Madey, William Bertozzi, W. U. Boeglin, Pete Markowitz, D. S. Dale, M. Khandaker, V. Zeps, Roberto Perrino, R. De Leo, E. Cisbani, J. Berthot, S. Frullani, H. Breuer, E. J. Brash, J. R. Vignote, T. P. Gorringe, J. M. Udías, F. W. Hersman, L. A. Ewell, J. Domingo, Gordon D. Cates, Paul Souder, A. Serdarevic-Offermann, A. Deur, C. Cavata, A. Soldi, J.E. Ducret, A. J. Sarty, P. Djawotho, C. Glashausser, R. Suleiman, Shalev Gilad, C. W. de Jager, and K. A. Aniol
Subjects: Physics, Nuclear and High Energy Physics, Proton, 010308 nuclear & particles physics, media_common.quotation_subject, Two-body problem, 01 natural sciences, Asymmetry, Eikonal approximation, Nuclear physics, Classical mechanics, 0103 physical sciences, Isobar, 010306 general physics, Relativistic quantum chemistry, Glauber, Oxygen-16, media_common
Abstract: The physics program in Hall A at Jefferson Lab commenced in the summer of 1997 with a detailed investigation of the ^(16)O(e,e′p) reaction in quasielastic, constant (q,ω) kinematics at Q^2≈0.8(GeV/c)^2, q≈1GeV/c, and ω≈445MeV. Use of a self-calibrating, self-normalizing, thin-film waterfall target enabled a systematically rigorous measurement. Five-fold differential cross-section data for the removal of protons from the 1p-shell have been obtained for 0
Published: 2004
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34. Measurement of the Generalized Polarizabilities of the Proton in Virtual Compton Scattering atQ2=0.92and1.76 GeV2

Author: G. Laveissière, L. Todor, N. Degrande, S. Jaminion, C. Jutier, R. Di Salvo, L. Van Hoorebeke, L. C. Alexa, B. D. Anderson, K. A. Aniol, K. Arundell, G. Audit, L. Auerbach, F. T. Baker, M. Baylac, J. Berthot, P. Y. Bertin, W. Bertozzi, L. Bimbot, W. U. Boeglin, E. J. Brash, V. Breton, H. Breuer, E. Burtin, J. R. Calarco, L. S. Cardman, C. Cavata, C.-C. Chang, J.-P. Chen, E. Chudakov, E. Cisbani, D. S. Dale, C. W. de Jager, R. De Leo, A. Deur, N. d'Hose, G. E. Dodge, J. J. Domingo, L. Elouadrhiri, M. B. Epstein, L. A. Ewell, J. M. Finn, K. G. Fissum, H. Fonvieille, G. Fournier, B. Frois, S. Frullani, C. Furget, H. Gao, J. Gao, F. Garibaldi, A. Gasparian, S. Gilad, R. Gilman, A. Glamazdin, C. Glashausser, J. Gomez, V. Gorbenko, P. Grenier, P. A. M. Guichon, J. O. Hansen, R. Holmes, M. Holtrop, C. Howell, G. M. Huber, C. E. Hyde-Wright, S. Incerti, M. Iodice, J. Jardillier, M. K. Jones, W. Kahl, S. Kato, A. T. Katramatou, J. J. Kelly, S. Kerhoas, A. Ketikyan, M. Khayat, K. Kino, S. Kox, L. H. Kramer, K. S. Kumar, G. Kumbartzki, M. Kuss, A. Leone, J. J. LeRose, M. Liang, R. A. Lindgren, N. Liyanage, G. J. Lolos, R. W. Lourie, R. Madey, K. Maeda, S. Malov, D. M. Manley, C. Marchand, D. Marchand, D. J. Margaziotis, P. Markowitz, J. Marroncle, J. Martino, K. McCormick, J. McIntyre, S. Mehrabyan, F. Merchez, Z. E. Meziani, R. Michaels, G. W. Miller, J. Y. Mougey, S. K. Nanda, D. Neyret, E. A. J. M. Offermann, Z. Papandreou, B. Pasquini, C. F. Perdrisat, R. Perrino, G. G. Petratos, S. Platchkov, R. Pomatsalyuk, D. L. Prout, V. A. Punjabi, T. Pussieux, G. Quémenér, R. D. Ransome, O. Ravel, J. S. Real, F. Renard, Y. Roblin, D. Rowntree, G. Rutledge, P. M. Rutt, A. Saha, T. Saito, A. J. Sarty, A. Serdarevic, T. Smith, G. Smirnov, K. Soldi, P. Sorokin, P. A. Souder, R. Suleiman, J. A. Templon, T. Terasawa, R. Tieulent, E. Tomasi-Gustaffson, H. Tsubota, H. Ueno, P. E. Ulmer, G. M. Urciuoli, M. Vanderhaeghen, R. Van De Vyver, R. L. J. Van der Meer, P. Vernin, B. Vlahovic, H. Voskanyan, E. Voutier, J. W. Watson, L. B. Weinstein, K. Wijesooriya, R. Wilson, B. B. Wojtsekhowski, D. G. Zainea, W-M. Zhang, J. Zhao, and Z.-L. Zhou
Subjects: Physics, Proton, 010308 nuclear & particles physics, Scattering, Momentum transfer, Compton scattering, General Physics and Astronomy, 01 natural sciences, 7. Clean energy, Nuclear physics, Paramagnetism, Dipole, Pion, Polarizability, 0103 physical sciences, Atomic physics, 010306 general physics
Abstract: We report a virtual Compton scattering study of the proton at low c.m. energies. We have determined the structure functions P(LL)-P(TT)/epsilon and P(LT), and the electric and magnetic generalized polarizabilities (GPs) alpha(E)(Q2) and beta(M)(Q2) at momentum transfer Q(2)=0.92 and 1.76 GeV2. The electric GP shows a strong falloff with Q2, and its global behavior does not follow a simple dipole form. The magnetic GP shows a rise and then a falloff; this can be interpreted as the dominance of a long-distance diamagnetic pion cloud at low Q2, compensated at higher Q2 by a paramagnetic contribution from piN intermediate states.
Published: 2004
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35. Backward electroproduction ofπ0mesons on protons in the region of nucleon resonances at four momentum transfer squaredQ2=1.0GeV2

Author: P.Y. Bertin, M. K. Jones, B. D. Anderson, G. J. Lolos, M. B. Epstein, S. Frullani, R. W. Lourie, Jing Zhao, W. Kahl, M. Kuss, J. W. Watson, Y. Roblin, Bogdan Wojtsekhowski, William Bertozzi, L. S. Cardman, D. Neyret, S. Jaminion, R. Michaels, S. Platchkov, F. T. Baker, H. Ueno, Pete Markowitz, R. Di Salvo, T. Terasawa, Vincent Breton, M. Khayat, J. Martino, Raphael Noel Tieulent, Sebastien Incerti, A. Saha, L. B. Auerbach, E. J. Brash, G. E. Dodge, V. A. Punjabi, R. A. Lindgren, Richard Madey, G. J. Kumbartzki, G. Laveissière, Z. Papandreou, J. J. LeRose, P. M. Rutt, O. Ravel, Roberto Perrino, R. De Leo, D. J. Margaziotis, J. A. Templon, Ronald Ransome, D. Rowntree, M. Baylac, J. P. Chen, A. Deur, P. Vernin, B. Frois, G. G. Petratos, Z. E. Meziani, K. Kino, E. Chudakov, J. O. Hansen, Justin I. McIntyre, R. I. Pomatsalyuk, K. Wijesooriya, Hiroaki Tsubota, A. Ketikyan, Z. L. Zhou, K. Soldi, A. Serdarevic, L. Bimbot, H. Breuer, M. Liang, R. Van de Vyver, G. M. Urciuoli, A. T. Katramatou, L. C. Alexa, G. Quéméner, V. Gorbenko, F. Renard, N. d'Hose, S. K. Nanda, S. Malov, E. Burtin, J. Domingo, C. R. Howell, J. R. Calarco, J. M. Finn, S. Kerhoas, M. Holtrop, J. Gomez, Thomas E. Smith, C. F. Perdrisat, C. Glashausser, E. Cisbani, W. U. Boeglin, Philippe Grenier, Latifa Elouadrhiri, G. Audit, A. Gasparian, C. E. Hyde-Wright, L. Todor, A. Leone, L. Tiator, S. Mehrabyan, L. A. Ewell, Kazushige Maeda, C. Furget, D. M. Manley, Kevin Fissum, D. G. Zainea, J. Jardillier, J. Gao, K. Arundell, R. Holmes, G. Rutledge, C. C. Chang, L. Van Hoorebeke, K. S. Kumar, Ronald Gilman, K. McCormick, Mauro Iodice, Nilanga Liyanage, H. Fonvieille, Pierre A.M. Guichon, Pavel Sorokin, Larry Weinstein, P. E. Ulmer, Paul Souder, A. V. Glamazdin, Haiyan Gao, R. L.J. van der Meer, S. Kox, G. M. Huber, F. Garibaldi, T. Saito, Richard Wilson, Laird Kramer, J. Y. Mougey, E. Voutier, Branislav Vlahovic, F. Merchez, G. Fournier, James J. Kelly, C. Marchand, Seigo Kato, G. W. Miller, H. Voskanyan, C. Jutier, David L. Prout, T. Pussieux, W. M. Zhang, J. Berthot, R. Suleiman, C. Cavata, S.S. Kamalov, G. Smirnov, A. J. Sarty, Shalev Gilad, C. W. de Jager, K. A. Aniol, E. A.J.M. Offermann, N. Degrande, J. Marroncle, D. Marchand, E. Tomasi-Gustaffson, J. S. Real, and D. S. Dale
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Nuclear Theory, Hadron, Momentum transfer, Sigma, 01 natural sciences, Nuclear physics, Baryon, Pion, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Nucleon, Lepton
Abstract: Exclusive electroproduction of pi{sup 0} mesons on protons in the backward hemisphere has been studied at Q2 = 1.0 GeV2 by detecting protons in the forward direction in coincidence with scattered electrons from the 4 GeV electron beam in Jefferson Lab's Hall A. The data span the range of the total (gamma*p) center-of-mass energy W from the pion production threshold to W = 2.0 GeV. The differential cross sections sigma{sub T} + epsilon sigma{sub L}, sigma{sub TL}, and sigma{sub TT} were separated from the azimuthal distribution and are presented together with the MAID and SAID parameterizations.
Published: 2004
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36. Precision Measurement of the Neutron Spin AsymmetryA1nand Spin-Flavor Decomposition in the Valence Quark Region

Author: E. Burtin, J. Gomez, William Bertozzi, Pete Markowitz, R. De Leo, Antonin Vacheret, D. J. Steiner, Jian-Ping Chen, S. Širca, S. Strauch, F. Marie, Baile Zhang, Paul Souder, S. K. Nanda, T. Averett, G. M. Urciuoli, H. Xiang, Sonja Dieterich, Haiyan Gao, Xiaofeng Zhu, S. Frullani, V. Sulkosky, A. Powell, X. Zheng, Dipanwita Dutta, A. Saha, D. J. Margaziotis, K. McCormick, Shalev Gilad, D. Lhuillier, C. W. de Jager, K. A. Aniol, Bryan J. Moffit, R. Roche, F. Garibaldi, D. S. Armstrong, J. R. Calarco, T. Horn, L. J. Kaufman, S. Binet, Bogdan Wojtsekhowski, F. Cusanno, E. Chudakov, E. Busato, Wolfgang Korsch, J. O. Hansen, A. Deur, C. Butuceanu, J. Roche, M. Roedelbronn, Karl Slifer, P. Solvignon, T. Pussieux, X. Jiang, B. Reitz, Z. Chai, M. Rvachev, Y. Xiao, D. Neyret, F. Xiong, Nilanga Liyanage, L. Zhu, J. J. LeRose, Z. E. Meziani, J. M. Finn, Guy Ron, Jiansong Gao, Seonho Choi, Ronald Gilman, A. Camsonne, Douglas Higinbotham, Jaideep Singh, James J. Kelly, N. Savvinov, K. Kramer, Adam M. Tobias, Gordon D. Cates, S. K. Phillips, R. Michaels, P. A. Zolnierczuk, and W. Hinton
Subjects: Quantum chromodynamics, Physics, Quark, Particle physics, Nuclear Theory, Hadron, Quark model, General Physics and Astronomy, Constituent quark, Deep inelastic scattering, Nuclear physics, Baryon, High Energy Physics::Experiment, Nuclear Experiment, Nucleon
Abstract: We have measured the neutron spin asymmetry A{sub 1}{sup n} with high precision at three kinematics in the deep inelastic region at x = 0.33, 0.47 and 0.60, and Q{sup 2} = 2.7, 3.5 and 4.8 (GeV/c){sup 2}, respectively. Our results unambiguously show, for the first time, that A{sub 1}{sup n} crosses zero around x = 0.47 and becomes significantly positive at x = 0.60. Combined with the world proton data, polarized quark distributions were extracted. Our results, in general, agree with relativistic constituent quark models and with perturbative quantum chromodynamics (pQCD) analyses based on the earlier data. However they deviate from pQCD predictions based on hadron helicity conservation.
Published: 2004
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37. Precision Measurement of the Neutron Spin Asymmetries and Spin-dependent Structure Functions in the Valence Quark Region

Author: Z. Chai, Douglas Higinbotham, G. M. Urciuoli, J. R. Calarco, L. J. Kaufman, D. J. Margaziotis, T. Averett, V. Sulkosky, Baile Zhang, S. K. Nanda, W. Hinton, Haiyan Gao, B. Reitz, Dipangkar Dutta, Bogdan Wojtsekhowski, E. Chudakov, Paul Souder, Nilanga Liyanage, Jaideep Singh, J. O. Hansen, Sonja Dieterich, L. Zhu, F. Garibaldi, D. S. Armstrong, F. Cusanno, F. Marie, Karl Slifer, C. Butuceanu, William Bertozzi, Z. E. Meziani, A. Deur, Jiansong Gao, D. J. Steiner, A. Powell, Seonho Choi, Jian-Ping Chen, K. McCormick, Pete Markowitz, J. Gomez, P. Solvignon, E. Burtin, J. LeRose, Ronald Gilman, R. De Leo, A. Camsonne, Arijit Saha, S. Frullani, J. M. Finn, X. Zheng, D. Lhuillier, Xiaofeng Zhu, Guy Ron, F. Xiong, S. Širca, S. Strauch, D. Neyret, Antonin Vacheret, T. Horn, S. Binet, Wolfgang Korsch, Hua Xiang, M. Roedelbronn, R. Roche, T. Pussieux, X. Jiang, M. Rvachev, Y. Xiao, Emmanuel Busato, Gordon D. Cates, S. K. Phillips, Shalev Gilad, C. W. de Jager, K. A. Aniol, R. Michaels, Bryan J. Moffit, J. Roche, P. A. Zolnierczuk, James J. Kelly, N. Savvinov, K. Kramer, Adam M. Tobias, Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and HALL A
Subjects: Nuclear and High Energy Physics, Particle physics, Hadron, Constituent quark, FOS: Physical sciences, Parton, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, High Energy Physics - Experiment, 13.60.Hb, 24.85.+p, 25.30.-c, Nuclear physics, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Quantum chromodynamics, Physics, 010308 nuclear & particles physics, Perturbative QCD, Deep inelastic scattering, Baryon, High Energy Physics - Phenomenology, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], High Energy Physics::Experiment, Nucleon
Abstract: We report on measurements of the neutron spin asymmetries $A_{1,2}^n$ and polarized structure functions $g_{1,2}^n$ at three kinematics in the deep inelastic region, with $x=0.33$, 0.47 and 0.60 and $Q^2=2.7$, 3.5 and 4.8 (GeV/c)$^2$, respectively. These measurements were performed using a 5.7 GeV longitudinally-polarized electron beam and a polarized $^3$He target. The results for $A_1^n$ and $g_1^n$ at $x=0.33$ are consistent with previous world data and, at the two higher $x$ points, have improved the precision of the world data by about an order of magnitude. The new $A_1^n$ data show a zero crossing around $x=0.47$ and the value at $x=0.60$ is significantly positive. These results agree with a next-to-leading order QCD analysis of previous world data. The trend of data at high $x$ agrees with constituent quark model predictions but disagrees with that from leading-order perturbative QCD (pQCD) assuming hadron helicity conservation. Results for $A_2^n$ and $g_2^n$ have a precision comparable to the best world data in this kinematic region. Combined with previous world data, the moment $d_2^n$ was evaluated and the new result has improved the precision of this quantity by about a factor of two. When combined with the world proton data, polarized quark distribution functions were extracted from the new $g_1^n/F_1^n$ values based on the quark parton model. While results for $\Delta u/u$ agree well with predictions from various models, results for $\Delta d/d$ disagree with the leading-order pQCD prediction when hadron helicity conservation is imposed., Comment: A typing error in A_\parallel(3He) at x=0.47 in Table VII of Phys. Rev. C has been noticed and corrected
Published: 2004
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38. Cross Section Measurements of Charged Pion Photoproduction in Hydrogen and Deuterium from 1.1 to 5.5 GeV

Author: P. E. Reimer, E. Chudakov, R. Michaels, S. K. Nanda, B. Reitz, V. Sulkosky, Sonja Dieterich, S. Strauch, W. Xu, Olfred Hansen, K. McCormick, X. Zheng, Douglas Higinbotham, X. Jiang, John C. Mitchell, Nilanga Liyanage, Jian-Ping Chen, E. R. Kinney, S. Frullani, R. J. Holt, C. F. Williamson, L. Zhu, Haiyan Gao, Branislav Vlahovic, C. Glashausser, Kevin Fissum, Benjamin Clasie, K. Hafidi, D. J. Mack, K. Wijesooriya, J. Zeng, E. Schulte, J. Calarco, J. Gomez, P. Markowitz, Z. E. Meziani, C. Crawford, Bogdan Wojtsekhowski, G. J. Kumbartzki, H. Xiang, K. Kramer, F. Dohrmann, D. H. Potterveld, M. Coman, Ronald Gilman, F. Xiong, Dipanwita Dutta, C. W. de Jager, Ronald Ransome, T. Chang, J. Seely, John Arrington, Arijit Saha, D. G. Meekins, S. Širca, E. J. Beise, J. LeRose, Larry Weinstein, and T. Averett
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Photon, Sigma, FOS: Physical sciences, Gluon, Nuclear physics, Cross section (physics), symbols.namesake, Pion, Deuterium, symbols, Feynman diagram, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment, Scaling
Abstract: The differential cross section for the gamma +n --> pi- + p and the gamma + p --> pi+ n processes were measured at Jefferson Lab. The photon energies ranged from 1.1 to 5.5 GeV, corresponding to center-of-mass energies from 1.7 to 3.4 GeV. The pion center-of-mass angles varied from 50 degree to 110 degree. The pi- and pi+ photoproduction data both exhibit a global scaling behavior at high energies and high transverse momenta, consistent with the constituent counting rule prediction and the existing pi+ data. The data suggest possible substructure of the scaling behavior, which might be oscillations around the scaling value. The data show an enhancement in the scaled cross section at center-of-mass energy near 2.2 GeV. The differential cross section ratios at high energies and high transverse momenta can be described by calculations based on one-hard-gluon-exchange diagrams., 18 pages, 19 figures
Published: 2004
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39. Basic instrumentation for Hall A at Jefferson Lab

Author: T. Pussieux, Paul Souder, J. H. Mitchell, Y. Roblin, O. Ravel, E. Chudakov, K. A. Griffioen, C. Cavata, J. A. Templon, H. F. Ibrahim, J. S. McCarthy, M. A. Stevens, D. P. Watts, B. Frois, W. J. Schneider, Dipangkar Dutta, R. Di Salvo, R. I. Pomatsalyuk, A. Soldi, G. J. Kumbartzki, Arijit Saha, N. Colombel, J. Berthot, Jing Zhao, A. J. Sarty, B. D. Anderson, J. Martine, M. Coman, R. Michaels, M. B. Epstein, R. W. Lourie, J. O. Hansen, N. Degrande, J. Mclntyre, John Arrington, L. Zhu, W. Kahl, Bogdan Wojtsekhowski, P. Djawotho, M. Leuschner, William Bertozzi, K. A. Aniol, A. Gasparian, Karl Slifer, Jrm Annand, C. F. Perdrisat, D. Pripstein, M. Baylac, S. Kox, X. Jiang, K. Kramer, H. Breuer, David Hamilton, Jian-Ping Chen, T. Averett, L. B. Auerbach, G. A. Rutledge, G. Quéméner, Stephanie Escoffier, P.Y. Bertin, R. Suleiman, R. Carr, Pete Markowitz, A. Deur, Z. Papandreou, R. L. Walter, R. D. McKeown, T. P. Gorringe, M. Rvachev, R. Holmes, S. Churchwell, J. Marroncle, S. Platchkov, M. Khandaker, M. Liang, L. Pierangeli, K. Kino, A. Ketikyan, Kevin Fissum, F. W. Hersman, J. LeRose, F. Giuliani, P. E. Ulmer, Roberto Perrino, R. De Leo, J. Gao, L. A. Ewell, S. Jensen, R. Crateri, Shalev Gilad, C. W. de Jager, D. Lhuillier, J.E. Ducret, M. Gricia, R. Iommi, F. Sabatavenere, P. A. Zolnierczuk, K. Wijesooriya, Alan M. Nathan, D. Rowntree, E. Voutier, H. Holmgren, S. K. Nanda, D. G. Meekins, K. S. Egiyan, C. R. Howell, A. Serdarevic-Offermann, Hiroaki Tsubota, D. G. Zainea, J. R. Calarco, S. Esp, T. Terasawa, Vincent Breton, C. C. Chang, J. Domingo, T. Black, A. T. Katramatou, S. Kerhoas, F. Santavenere, J. Y. Mougey, R. Van de Vyver, G. M. Urciuoli, Seigo Kato, G. M. Huber, B. Reitz, E. J. Beise, K. S. Kumar, F. Garibaldi, Pavel Sorokin, G. J. Lolos, M. Lucentini, J. Segal, H. Xiang, D. V. Boykin, W. U. Boeglin, C. Glashausser, E. Cisbani, A. Leone, R. D. Ransomez, Gordon D. Cates, Sonja Dieterich, H. Voskanyan, C. Jutier, R. L.J. van der Meer, Olivier Gayou, James A. Miller, L. Van Hoorebeke, Sebastien Incerti, J. Jardillier, L. Cardman, James J. Kelly, F. Xiong, S. Jaminion, I. K. Kominis, K. McCormick, P. Vernin, P. M. Rutt, A. Petrosyan, David L. Prout, Nilanga Liyanage, L. Lagamba, X. Zheng, S. L. Spiegel, Branislav Vlahovic, Leonid Levchuk, Mauro Iodice, Larry Weinstein, F. Marie, D. G. Ireland, N. S. Chant, David Manley, V. A. Punjabi, C. E. Jones, J. Gomez, Wolfgang Korsch, W. Xu, J. W. Watson, M. Roedelbronn, F. T. Baker, Z. E. Meziani, T. Saito, S. Frullani, H. Ueno, E. J. Brash, R. Roche, E. Hovhannisyan, C. E. Hyde-Wright, N. d'Hose, L. Bimbot, G. Laveissière, R. Madey, Kazushige Maeda, A. Gavalya, W. Miller, D. Neyret, T. P. Smith, B. Diederich, E. Burtin, M. Holtrop, L. Todor, G. Dezern, Z. L. Zhou, K. Livingston, D. S. Dale, V. Zeps, S. Mayilyan, E. Folts, B. D. Milbrath, Haiyan Gao, J. M. Finn, O. Rondon-Aramayo, R. A. Lindgren, V. Gorbenko, A. V. Glamazdin, Z. Chai, E. A.J.M. Offermann, S. Malov, J. Alcorn, S. Strauch, A. Shahinyan, G. Rosner, H. Fonvieille, P. G. Roos, E. W. Hughes, K. Joo, D. S. Brown, P. Brindza, G. G. Petratos, S. van Verst, M. Khayat, S. Colilli, Douglas Higinbotham, M. K. Jones, D. J. Margaziotis, M. Kuss, Seonho Choi, Ronald Gilman, Thomas Jefferson National Accelerator Facility (Jefferson Lab), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), HALL A, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear and High Energy Physics, Spectrometer, 010308 nuclear & particles physics, Cryogenics, Scintillator, 7. Clean energy, 01 natural sciences, Particle identification, Magnetic field, Nuclear physics, Cardinal point, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Nuclear Experiment, 010306 general physics, Nucleon, Instrumentation, Cherenkov radiation
Abstract: The instrumentation in Hall A at the Thomas Jefferson National Accelerator Facility was designed to study electro-and photo-induced reactions at very high luminosity and good momentum and angular resolution for at least one of the reaction products. The central components of Hall A are two identical high resolution spectrometers, which allow the vertical drift chambers in the focal plane to provide a momentum resolution of better than 2 x 10(-4). A variety of Cherenkov counters, scintillators and lead-glass calorimeters provide excellent particle identification. The facility has been operated successfully at a luminosity well in excess of 10(38) CM-2 s(-1). The research program is aimed at a variety of subjects, including nucleon structure functions, nucleon form factors and properties of the nuclear medium. (C) 2003 Elsevier B.V. All rights reserved.
Published: 2004
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40. Plane-wave impulse approximation extraction of the neutron magnetic form factor from quasielastic3He→(e→,e′)atQ2=0.3to0.6(GeV/c)2

Author: G. G. Petratos, Z. E. Meziani, J. M. Finn, A. Saha, W. Xu, J. P. Chen, D. Pripstein, J. S. Jensen, C. E. Jones, K. McCormick, Dipangkar Dutta, C. R. Howell, P. Żołnierczuk, S. Churchwell, A. Kievsky, R. I. Pomatsalyuk, J. R. Calarco, Ronald Ransome, G. S. Corrado, T. Black, Sebastien Incerti, K. Kramer, E. Chudakov, Emanuele Pace, R. Holmes, John C. Mitchell, T.W. Donnelly, D. S. Dale, M. K. Jones, Gordon D. Cates, K. McIlhany, E. Lakuriqi, T. Averett, M. Liang, J. O. Hansen, G. J. Kumbartzki, B. D. Anderson, Jacek Golak, Bogdan Wojtsekhowski, W. Glöckle, F. W. Hersman, S. Strauch, P. Djawotho, E. W. Hughes, D. W. Higinbotham, B. Humensky, Haiyan Gao, D. J. Margaziotis, C. F. Williamson, L. Auberbach, C. Glashausser, Karl Slifer, M. Sutter, J. Yeh, M. Viviani, Wolfgang Korsch, S. K. Nanda, M. Kuss, I. K. Kominis, C. W. de Jager, B. Tipton, William Bertozzi, F. Xiong, C. Crawford, J. W. Watson, Nilanga Liyanage, A. Deur, Hiroyuki Kamada, R. D. McKeown, R. Michaels, G. Salme, Y. Roblin, Branislav Vlahovic, Seonho Choi, L. S. Cardman, R. Suleiman, R. Kahl, L. Todor, S. Malov, J. Gomez, M. Schnee, J. W. Martin, Henryk Witała, Ronald Gilman, Paul Souder, T. Pavlin, G. W. Miller, David L. Prout, X. Jiang, M. Rvachev, T. Shin, A. V. Glamazdin, Z. Chai, J. J. LeRose, and V. Gorbenko
Subjects: Physics, Nuclear physics, Nuclear reaction, Nuclear and High Energy Physics, Quasielastic scattering, Scattering, Magnetic form factor, Hadron, Momentum transfer, Neutron, Nuclear Experiment, Nucleon
Abstract: A high precision measurement of the transverse spin-dependent asymmetry A_T' in ^3He(e,e') quasielastic scattering was performed in Hall A at Jefferson Lab at values of the squared four-momentum transfer, Q^2, between 0.1 and 0.6 (GeV/c)^2. A_(T') is sensitive to the neutron magnetic form factor, G_M^n . Values of G_M^n at Q^2 = 0.1 and 0.2 (GeV/c)^2, extracted using Faddeev calculations, were reported previously. Here, we report the extraction of G_M^n for the remaining Q^2 values in the range from 0.3 to 0.6 (GeV/c)^2 using a plane-wave impulse approximation calculation. The results are in good agreement with recent precision data from experiments using a deuterium target.
Published: 2003
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41. Spin Physics at CEBAF

Author: S. K. Nanda
Subjects: Physics, Nuclear physics, Nuclear Theory, Magnetic form factor, Cathode ray, Electric form factor, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment, Nucleon, Spin (physics)
Abstract: A summary of the proposed spin physics program at CEBAF is presented. These studies include the electromagnetic form factors of the nucleon as well as the spin response of nuclei via electroproduction of polarized nucleons with a 4 GeV continuous electron beam.
Published: 1991
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42. A large-angle pion-nucleus scattering facility for EPICS at LAMPF

Author: M. Brown, E.C. Milner, Shaul Mordechai, Kazushige Maeda, Zhehui Wang, Christopher Morris, W. B. Cottingame, James F. Amann, J. D. Zumbro, D. Yusnukis, Peter A. Seidl, Rex R. Kiziah, N. Tanaka, C. F. Moore, Steven J. Greene, K. S. Dhuga, J. A. Faucett, G. R. Burleson, C. L. Blilie, R. L. Boudrie, S. J. Seestrom-Morris, D. Dehnhard, S. K. Nanda, D. S. Oakley, and C.P. Fontenla
Subjects: Nuclear physics, Elastic scattering, Physics, Nuclear and High Energy Physics, Angular range, Pion, medicine.anatomical_structure, Scattering, medicine, Instrumentation, Nucleus
Abstract: A facility has been constructed to extend the measurements of pion-nucleus scattering with the EPICS system at LAMPF into the angular range of 115 to 180°. The design of the system is described, and results of tests on it are given. Comparisons of measurements of elastic scattering cross sections with previous data are presented.
Published: 1986
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43. Anomalous spin response in the 4He(p[downward right arrow],p[downward right arrow]’)4He∗ reaction at 500 MeV

Author: M. K. Jones, Y. F. Yen, S. M. Sterbenz, C. E. Parman, K. W. Jones, D. Dehnhard, and S. K. Nanda
Subjects: Nuclear physics, Physics, Nuclear Theory, Atomic physics, Nuclear Experiment, Spin (physics)
Abstract: Spin‐flip probabilities, Snn, larger than the free nucleon‐nucleon values were observed in the 4He(p↘,p↘’)4He* reaction at Tp=500 MeV and q=375 MeV/c. The results differ from previous measurements on other nuclei.
Published: 1989
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