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3. Recovery of Iron values through conventional beneficiation techniques from Banded Hematite Jasper of Eastern India with special reference to mineralogical and chemical characterization

Author

S K Nanda, D Beura, and S Pani

Subjects
Multidisciplinary, Goethite, Materials science, Mineral, Metallurgy, Magnetic separation, Beneficiation, Hematite, engineering.material, High-intensity magnetic separator, chemistry.chemical_compound, chemistry, Iron ore, visual_art, visual_art.visual_art_medium, engineering, Magnetite
Abstract

Background/Objectives: Due to soaring demand and rapid depletion of high-grade iron ores, lean grade iron ores of India like BHJ and BHQ needs to be utilized through suitable beneficiation techniques. Methods: Banded Hematite Jasper (BHJ) sample of Bonai-Keonjhar belt (BK belt), Odisha, India assayed 35.3 % Fe, 47.1% SiO2 and 0.96% Al2O3 was investigated in respect of mineralogy, liberation characteristics and chemistry to finding out its optimum beneficiation potential. In the present investigation, efforts have been made to characterize the BHJ sample with reference to its beneficiation response. The sample was subjected to various beneficiation operations like Jigging followed by hydrocyclone, two-stage tabling and magnetic Separation. Findings: Mineralogical studies indicate that quartz and hematite are the major mineral phases, whereas goethite, martitized magnetite and clay (kaolinite) are present in very minor amounts. The liberation characteristic indicates that the average band thickness of Iron bearing mineral is of 1680 microns and 80% of the iron bearing minerals are liberated at -105 microns size. The two stage tabling of jig concentrate with desliming gives better outcome as compared with direct tabling of jig concentrate. An iron ore concentrate assayed 64.5% Fe, 5.6% SiO2 and 0.80% Al2O3 with wt% recovery of 23.2% can be obtained from two stage tabling. Another concentrate from magnetic separation of table middling and hydrocyclone assayed 63.2% Fe, 7.2% SiO2 and 0.7% Al2O3 with wt% recovery of 12.4% can be obtained. Novelty/ Application: Here a conventional beneficiation flow sheet is developed with a finding that, in order to beneficiate ore like banded hematite jasper (BHJ), an integral characterization approach is very much essential. Both of the concentrates obtained through the flow sheet assayed 64% Fe, 6.2% SiO2 and 0.7% Al2O3 with a wt% recovery of 35.6% can be utilized as a feed stock for pellet making in iron ore industries. Keywords: Banded Hematite Jasper (BHJ); mineral beneficiation; wet high intensity magnetic separator (WHIMS); jigging; Bonai-Keonjhar belt

Published
2020
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4. Measurement of the 3He spin-structure functions and of neutron (3He) spin-dependent sum rules at 0.035 ≤ Q2 ≤ 0.24 GeV2

Author

Wolfgang Korsch, P.Y. Bertin, A. Shabetai, N. Kolb, Pete Markowitz, Houbing Lu, T.B. Humensky, K. Kramer, R. Roche, Z. E. Meziani, R. De Leo, Antonin Vacheret, Ronald Ransome, Jaideep Singh, R. J. Feuerbach, M. Iodice, F. Garibaldi, W. U. Boeglin, Nilanga Liyanage, L. J. Kaufman, X. Zhan, J. Yuan, J. Gomez, L. Zhu, R. Stringer, L. Wan, Seung-Tae Woo, H. F. Ibrahim, D. Hayes, L. Lagamba, J. Niedziela, Ronald Pandolfi, Douglas Higinbotham, A.J.R. Puckett, S. Dhamija, K. McCormick, S. L. Bailey, Bogdan Wojtsekhowski, J. P. Chen, V. Laine, E. Chudakov, X. Zheng, S. Frullani, P. Monaghan, S. K. Nanda, B. Craver, Yujie Qiang, G. J. Kumbartzki, D. S. Armstrong, J. O. Hansen, P. E. Ulmer, N. Ton, K. E. Keister, G. Laveissière, J. M. Finn, Simon Širca, B. Ma, K. Wang, B. Hersman, R. A. Lindgren, J. J. LeRose, M. Niskin, A. Saha, A. Kelleher, Karl Slifer, V. Sulkosky, F. Cusanno, Seonho Choi, S. Abrahamyan, Ronald Gilman, A. Deur, A. V. Glamazdin, A. Camsonne, D. Lhuillier, J. C. Cornejo, P. Solvignon, R. Subedi, A. Kolarkar, A. Beck, T. Averett, C. E. Hyde, Kent Paschke, Charles Glashausser, V. A. Punjabi, W. Kim, Haiyan Gao, E. Voutier, M. Potokar, L. Coman, J. D. Denton, B. Reitz, C. C. Chang, Olivier Gayou, K. Fuoti, X. Jiang, D. J. Margaziotis, C. Peng, H. Yao, G. D. Cates, William A. Tobias, R. Snyder, G. M. Urciuoli, C. W. de Jager, K. A. Aniol, Bryan J. Moffit, T. Holmstrom, M. Meziane, F. Butaru, R. Michaels, Laboratoire de Physique de Clermont (LPC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA), 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, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Jefferson Lab E97-110, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Clermont Auvergne (UCA)-Centre National de la Recherche Scientifique (CNRS), 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)-Université Grenoble Alpes (UGA), and E97-110

Subjects
Nuclear and High Energy Physics, n: polarization, Electron, structure function: spin, Spin structure, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], spin: dependence, 01 natural sciences, High Energy Physics - Experiment, 0103 physical sciences, Effective field theory, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Neutron, helium: polarization, 010306 general physics, Nuclear Experiment, Spin-½, Physics, Quantum chromodynamics, 010308 nuclear & particles physics, deuteron: structure function, cross section: difference, Resonance, Observable, perturbation theory: chiral, lcsh:QC1-999, sum rule: spin, Atomic physics, spin: asymmetry, lcsh:Physics, experimental results, Jefferson Lab
Abstract

The spin-structure functions $g_1$ and $g_2$, and the spin-dependent partial cross-section $\sigma_\mathrm{TT}$ have been extracted from the polarized cross-sections differences, $\Delta \sigma_{\parallel}\hspace{-0.06cm}\left(\nu,Q^{2}\right)$ and $\Delta \sigma_{\perp}\hspace{-0.06cm}\left(\nu,Q^{2}\right)$ measured for the $\vec{^\textrm{3}\textrm{He}}(\vec{\textrm{e}},\textrm{e}')\textrm{X}$ reaction, in the E97-110 experiment at Jefferson Lab. Polarized electrons with energies from 1.147 to 4.404 GeV were scattered at angles of 6$^{\circ}$ and 9$^{\circ}$ from a longitudinally or transversely polarized $^{3}$He target. The data cover the kinematic regions of the quasi-elastic, resonance production and beyond. From the extracted spin-structure functions, the first moments $\overline{\Gamma_1}\hspace{-0.06cm}\left(Q^{2}\right)$, $\Gamma_2\hspace{-0.06cm}\left(Q^{2}\right)$ and $I_{\mathrm{TT}}\hspace{-0.06cm}\left(Q^{2}\right)$ are evaluated with high precision for the neutron in the $Q^2$ range from 0.035 to 0.24~GeV$^{2}$. The comparison of the data and the chiral effective field theory predictions reveals the importance of proper treatment of the $\Delta$ degree of freedom for spin observables., Comment: 7 pages, 5 figures, 3 tables. Version published in Phys. Lett. B

Published
2020
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5. 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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6. 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

7. 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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8. Automated unified system for LPG using microcontroller and GSM module- A Review

Author

S. K. Nanda and B. B. Didpaye

Subjects
Computer science, business.industry, Liquefied petroleum gas, Automotive engineering, Gas monitoring, law.invention, Unified system, Microcontroller, ALARM, Relay, law, Embedded system, business, Gsm module, Leakage (electronics)
Abstract

A cost-effective, Automated Unified System for Liquefied Petroleum Gas (LPG) booking, leakage detection, real time gas monitoring system and automatic controlling of LPG regulator is proposed in this paper. The aim of this paper is to monitor for LPG leakage to avoid fire accidents providing house safety feature where security has been an important issue. The system detects the leakage of the LPG using gas sensor MQ6 and alerts the consumer about the gas leakage by sending SMS using GSM module and simultaneously activating the alarm and exhaust fan. The system additionally provides the automatically controlling of LPG regulator. To avoid the blast this system will disconnect the main power supply using relay. The additional advantage of the system is that it continuously monitors the level of the LPG present in the cylinder using weight sensor and automatically books the cylinder using a GSM module.

Published
2015
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9. Live table fish transportation - a means of innovative value addition in the fish retail markets of Ludhiana, Punjab

Author

T. Ahmad, A. U. Muzaddadi, Monika Monika, and S. K. Nanda

Subjects
Agricultural science, Value (economics), %22">Fish , Table (landform), Aquatic Science, Mathematics
Abstract

In the present study, different means of transportation of live table fish in Sherpur Fish Market, Ludhiana District in Punjab were investigated. Two methods, one for short distance (travel time

Published
2017
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10. 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

11. 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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12. 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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13. 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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15. Measurements ofd2nandA1n: Probing the neutron spin structure

Author

T. Averett, C. E. Hyde, A. Saha, R. Subedi, Nilanga Liyanage, R. A. Lindgren, J. J. LeRose, V. Sulkosky, S. K. Nanda, Yujie Qiang, D. Flay, S. Riordan, Fatiha Benmokhtar, Simon Širca, M. H. Shabestari, F. Garibaldi, Bogdan Wojtsekhowski, H. Yao, Wolfgang Korsch, Young Do Oh, V. Mamyan, G. D. Cates, A. Kolarkar, R. Michaels, M. M. Dalton, Douglas Higinbotham, Whitney Armstrong, X. Deng, C. Dutta, H. F. Ibrahim, N. Muangma, William A. Tobias, M. Friend, W. Troth, E. Chudakov, Diana Parno, M. Mihovilovic, D. McNulty, Haiyan Gao, X. Zhan, G. J. Kumbartzki, G. Jin, J. P. Chen, J. Gomez, B. Sawatzky, M. Posik, X. Zheng, X. Jiang, Chunhui Chen, X. Yan, Ronald Ransome, Wouter Deconinck, G. B. Franklin, B. Zhao, L. Guo, Z. Ye, B. E. Norum, T. Holmstrom, Xin Qian, A. Shahinyan, E. Long, Y. Zhang, S. Choi, Jen-Chieh Peng, A. Kelleher, J. Huang, A. Lukhanin, Yingxiao Wang, L. El Fassi, Mustafa Canan, Kalyan Allada, Vladimir Nelyubin, Shalev Gilad, L. Yuan, C. W. de Jager, Bryan J. Moffit, S. Golge, Abdurahim Rakhman, Z. E. Meziani, F. Cusanno, P. Solvignon, A. Deur, Yiyang Zhang, Y. X. Ye, William Bertozzi, Amrendra Narayan, Joseph M. Katich, D. Wang, Ronald Gilman, O. Glamazdin, Olfred Hansen, Alexandre Camsonne, and Nuruzzaman

Subjects
Quark, Physics, Quantum chromodynamics, QCD sum rules, Particle physics, 010308 nuclear & particles physics, Constituent quark, Lattice QCD, Deep inelastic scattering, 01 natural sciences, 0103 physical sciences, High Energy Physics::Experiment, Neutron, Atomic physics, 010306 general physics, Electron scattering
Abstract

We report on the results of the E06-014 experiment performed at Jefferson Lab in Hall A, where a precision measurement of the twist-3 matrix element d_2 of the neutron (d^n_2) was conducted. The quantity dn_2 represents the average color Lorentz force a struck quark experiences in a deep inelastic electron scattering event off a neutron due to its interaction with the hadronizing remnants. This color force was determined from a linear combination of the third moments of the ^3He spin structure functions, g_1 and g_2, after nuclear corrections had been applied to these moments. The structure functions were obtained from a measurement of the unpolarized cross section and of double-spin asymmetries in the scattering of a longitudinally polarized electron beam from a transversely and a longitudinally polarized ^3He target. The measurement kinematics included two average Q^2 bins of 3.2 GeV^2 and 4.3 GeV^2, and Bjorken-x 0.25≤ x ≤0.90 covering the deep inelastic and resonance regions. We have found that d^n_2 is small and negative for ⟨Q^2⟩=3.2 GeV^2, and even smaller for ⟨Q^2⟩=4.3 GeV^2, consistent with the results of a lattice QCD calculation. The twist-4 matrix element f^n_2 was extracted by combining our measured d^n_2 with the world data on the first moment in x of g^n_1, Γ^n_1. We found f^n_2 to be roughly an order of magnitude larger than dn2. Utilizing the extracted d^n_2 and f^n_2 data, we separated the Lorentz color force into its electric and magnetic components, F^(y,n)_E and F^(y,n)_B, and found them to be equal and opposite in magnitude, in agreement with the predictions from an instanton model but not with those from QCD sum rules. Furthermore, using the measured double-spin asymmetries, we have extracted the virtual photon-nucleon asymmetry on the neutron A^n_1, the structure function ratio g^n_1/F^n_1, and the quark ratios (Δu+Δu)/(u+u) and (Δd+Δd)/(d+d). These results were found to be consistent with deep-inelastic scattering world data and with the prediction of the constituent quark model but at odds with the perturbative quantum chromodynamics predictions at large x.

Published
2016
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16. A high-finesse Fabry-Perot cavity with a frequency-doubled green laser for precision Compton polarimetry at Jefferson Lab

Author

Vladimir Nelyubin, M. Hafez, Kent Paschke, Fatiha Benmokhtar, Diana Parno, Abdurahim Rakhman, S. K. Nanda, M. M. Dalton, B. P. Quinn, Paul Souder, William A. Tobias, G. B. Franklin, G. D. Cates, A. Camsonne, M. Friend, and R. Michaels

Subjects
Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Polarimetry, Physics::Optics, FOS: Physical sciences, 01 natural sciences, law.invention, 010309 optics, Finesse, Optics, law, 0103 physical sciences, Nuclear Experiment (nucl-ex), 010306 general physics, Instrumentation, Nuclear Experiment, Physics, business.industry, Energy conversion efficiency, Instrumentation and Detectors (physics.ins-det), Polarization (waves), Laser, Cathode ray, Optoelectronics, Continuous wave, Physics::Accelerator Physics, business, Fabry–Pérot interferometer
Abstract

A high-finesse Fabry-Perot cavity with a frequency-doubled continuous wave green laser (532~nm) has been built and installed in Hall A of Jefferson Lab for high precision Compton polarimetry. The infrared (1064~nm) beam from a ytterbium-doped fiber amplifier seeded by a Nd:YAG nonplanar ring oscillator laser is frequency doubled in a single-pass periodically poled MgO:LiNbO$_{3}$ crystal. The maximum achieved green power at 5 W IR pump power is 1.74 W with a total conversion efficiency of 34.8\%. The green beam is injected into the optical resonant cavity and enhanced up to 3.7~kW with a corresponding enhancement of 3800. The polarization transfer function has been measured in order to determine the intra-cavity circular laser polarization within a measurement uncertainty of 0.7\%. The PREx experiment at Jefferson Lab used this system for the first time and achieved 1.0\% precision in polarization measurements of an electron beam with energy and current of 1.0~GeV and 50~$\mu$A., Comment: 20 pages, 22 figures, revised version of arXiv:1601.00251v1, submitted to NIMA

Published
2016
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17. 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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18. 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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19. Spectroscopy ofLiΛ9by electroproduction

Author

T. Miyoshi, P. Brindza, V. A. Punjabi, W. U. Boeglin, X. Jiang, Bogdan Wojtsekhowski, L. Lagamba, D. J. Millener, E. Cisbani, L. Coman, V. Sulkosky, Pete Markowitz, H. Ueno, S. Marrone, R. Michaels, V. M. Rodriguez, Jaideep Singh, B. E. Norum, P. E. Reimer, K. Kino, B. Reitz, R. De Leo, Pavlo Baturin, S. K. Nanda, Yujie Qiang, P. Bydžovský, P.Y. Bertin, S. Colilli, C. Munoz Camacho, H. Breuer, Y. Okasyasu, Vladimir Nelyubin, Z. E. Meziani, Salvatore Frullani, M. Lucentini, J. P. Chen, G. de Cataldo, L. J. Kaufman, G. M. Urciuoli, A. Shahinyan, K. A. Aniol, Franco Garibaldi, Joerg Reinhold, C. E. Hyde, F. Cusanno, A. Deur, Simon Širca, B. Kross, Douglas Higinbotham, Kent Paschke, Tohru Suzuki, E. Piasetzky, M. Gricia, Eugenio Nappi, J. Gomez, A. Acha, D. J. Margaziotis, P. E. Ulmer, C. Zorn, Mauro Iodice, C. C. Chang, D. Hayes, H. Benaoum, H. F. Ibrahim, R. A. Lindgren, J. J. LeRose, A. Saha, X. Zheng, R. J. Feuerbach, P. Veneroni, R. Fratoni, P. Ambrozewicz, Seonho Choi, K. I. Blomqvist, E. Chudakov, C. Ferdi, T. Holmstrom, J. O. Hansen, K. McCormick, J. Segal, A. Camsonne, A. J. Sarty, R. Subedi, Maryam Moteabbed, M. Sotona, Olivier Gayou, R. Snyder, C. W. de Jager, Bryan J. Moffit, R. Roche, F. Giuliani, P. Monaghan, B. Craver, C. F. Perdrisat, E. Folts, F. Santavenere, E. Voutier, and P. Solvignon

Subjects
Superconductivity, Physics, Nuclear and High Energy Physics, Nuclear Theory, Order (ring theory), Atomic physics, Nuclear Experiment, Ground state, Hypernucleus, Spectroscopy, Lambda, Energy (signal processing), Spectral line
Abstract

Background: In the absence of accurate data on the free two-body hyperon-nucleon interaction, the spectra of hypernuclei provides information on the details of the effective hyperon-nucleon interaction.Purpose: To obtain a high-resolution binding-energy spectrum for the ${}^{9}\mathrm{Be}(e,{e}^{\ensuremath{'}}{K}^{+})_{\ensuremath{\Lambda}}^{9}\mathrm{Li}$ reaction.Method: Electroproduction of the hypernucleus $_{\ensuremath{\Lambda}}^{9}\mathrm{Li}$ has been studied for the first time with sub-MeV energy resolution in Hall A at Jefferson Lab on a $^{9}\mathrm{Be}$ target. In order to increase the counting rate and to provide unambiguous kaon identification, two superconducting septum magnets and a ring imaging Cherenkov detector were added to the Hall A standard equipment.Results: The cross section to low-lying states of $_{\ensuremath{\Lambda}}^{9}\mathrm{Li}$ is concentrated within 3 MeV of the ground state and can be fit with four peaks. The positions of the doublets agree with theory while a disagreement could exist with respect to the relative strengths of the peaks in the doublets. The $\ensuremath{\Lambda}$ separation energy, ${B}_{\ensuremath{\Lambda}}$, of $8.36\ifmmode\pm\else\textpm\fi{}0.08$ (stat.) $\ifmmode\pm\else\textpm\fi{}0.08$ (syst.) MeV was measured, in agreement with an earlier experiment.

Published
2015
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20. 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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24. 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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25. 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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26. 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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27. Precision Measurement of the Neutron Twist-3 Matrix Elementd2n: Probing Color Forces

Author

H. F. Ibrahim, T. Averett, C. E. Hyde, B. Zhao, V. Mamyan, E. Chudakov, Bogdan Wojtsekhowski, F. Cusanno, Fatiha Benmokhtar, Whitney Armstrong, R. Michaels, A. Kolarkar, S. Choi, Y. Zhang, X. Yan, Xin Qian, Mustafa Canan, G. D. Cates, Kalyan Allada, Yiyang Zhang, Amrendra Narayan, Joseph M. Katich, G. B. Franklin, Young Do Oh, W. Troth, A. Saha, N. Muangma, Wouter Deconinck, A. Shahinyan, T. Holmstrom, M. Mihovilovic, M. H. Shabestari, Haiyan Gao, D. Wang, G. Jin, X. Zheng, R. A. Lindgren, L. Guo, J. J. LeRose, R. Subedi, Ronald Gilman, H. Yao, E. Long, S. Golge, M. Posik, X. Deng, Wolfgang Korsch, Douglas Higinbotham, A. Kelleher, M. Friend, S. K. Nanda, Yujie Qiang, X. Jiang, D. Flay, Y. X. Ye, P. Solvignon, D. McNulty, G. Kumbartzki, Nuruzzaman, Z. E. Meziani, Simon Širca, Chunhui Chen, F. Garibaldi, B. Moffit, B. Sawatzky, A. Deur, Yingxiao Wang, O. Glamazdin, Olfred Hansen, A. Camsonne, Z. Ye, B. E. Norum, Vincent Sulkosky, J. Gomez, Shalev Gilad, Jen-Chieh Peng, X. Zhan, L. Yuan, C. W. de Jager, Diana Parno, C. Dutta, William A. Tobias, J. P. Chen, J. Huang, A. Lukhanin, William Bertozzi, L. El Fassi, Nilanga Liyanage, Abdurahim Rakhman, Vladimir Nelyubin, M. M. Dalton, and S. Riordan

Subjects
Physics, Scattering, General Physics and Astronomy, High Energy Physics::Experiment, Neutron, Electron, Lattice QCD, Atomic physics, Spin structure, Deep inelastic scattering, Resonance (particle physics), Beam (structure)
Abstract

Double-spin asymmetries and absolute cross sections were measured at large Bjorken x (0.25≤x≤0.90), in both the deep-inelastic and resonance regions, by scattering longitudinally polarized electrons at beam energies of 4.7 and 5.9 GeV from a transversely and longitudinally polarized ^3He target. In this dedicated experiment, the spin structure function g^3He_2 was determined with precision at large x, and the neutron twist-3 matrix element dn2 was measured at ⟨Q2⟩ of 3.21 and 4.32 GeV^2/c^2, with an absolute precision of about 10^(−5). Our results are found to be in agreement with lattice QCD calculations and resolve the disagreement found with previous data at ⟨Q^2⟩=5 GeV^2/c^2. Combining d^n_2 and a newly extracted twist-4 matrix element f^n_2, the average neutron color electric and magnetic forces were extracted and found to be of opposite sign and about 30 MeV/fm in magnitude.

Published
2014
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28. 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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29. 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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30. 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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31. 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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32. Second branchial sinus - A case report

Author

B. Shankar, N. Hemaraju, S. K. Nanda, and Medikeri

Subjects
animal structures, Clinical Report, Pharyngeal pouch, business.industry, Fistula, Branchial sinus, Invagination, Ectoderm, Anatomy, medicine.disease, body regions, medicine.anatomical_structure, Otorhinolaryngology, embryonic structures, Head and neck surgery, Medicine, Surgery, Endoderm, business
Abstract

Branchial apparatus consists of six pairs of mesodermal arches. Invagination of endoderm from inside and ectoderm from outside are known as pharyngeal pouch and branchial clefts respectively. Incomplete fusion of these structure lead to formation of branchial sinus/ fistula. Anomoly of second arch is commonest and manifests as Branchial sinus. We present such a case in a 18 years old boy.

Published
2012

33. Sub-lingual dermoid cyst

Author

N. Hemaraju, S. K. Nanda, and Shankar B. Medikeri

Subjects
Pathology, medicine.medical_specialty, business.industry, Anatomy, Oral cavity, medicine.disease, Article, medicine.anatomical_structure, Otorhinolaryngology, Swallowing, Dermoid cyst, Tongue, Head and neck surgery, medicine, otorhinolaryngologic diseases, Surgery, business
Abstract

Dermoid cysts are commonly found through out the body . In the oral cavity, though rare, dermoids commonly present sublingually. Typically, they present as slow growing masses, causing elevation of the tongue, interference with speech and swallowing. We report a case of sublingual dermoid cyst in a two years old female child.

Published
2012

34. New Measurements of the Transverse Beam Asymmetry for Elastic Electron Scattering from Selected Nuclei

Author

P. M. King, H. Yao, H. Albataineh, B. Craver, William A. Tobias, J. Leckey, A. Kolarkar, Jie Zhang, Kiadtisak Saenboonruang, S. Frullani, B. Waidyawansa, P. Y. Bertin, J. P. Chen, M. L. Sperduto, E. Kuchina, Jaideep Singh, K. de Jager, M. Friend, B. Reitz, J. Barber, K. Otis, Charles Horowitz, Yiyang Zhang, J. Huang, G. M. Urciuoli, C. M. Jen, A. Barbieri, M. M. Dalton, Young Do Oh, C. M. Sutera, S. K. Nanda, Yujie Qiang, E. Cisbani, Eric L. N. Jensen, D. Neyret, A. J. R. Puckett, G. B. Franklin, Joseph M. Katich, M. Poelker, D. J. Margaziotis, R. Holmes, N. Muangma, S. K. Phillips, B. P. Quinn, A. Etile, J. Roche, Wouter Deconinck, V. Yim, S. Riordan, D. Deepa, T. Bielarski, D. Lhuillier, G.V. Russo, K. Grimm, E. Fuchey, R. Michaels, Douglas Higinbotham, R. A. Lindgren, J. J. LeRose, S. Kowalski, V. Bellini, F. Itard, R. Subedi, S. Johnston, A. Palmer, A. Beck, T. Averett, F. Mammoliti, M. Mihovilovic, A. Shahinyan, J. M. Finn, M. Stutzman, D. S. Armstrong, J. Wexler, Z. Ahmed, L. Zana, E. Voutier, C. E. Hyde, E. Burtin, Guy Ron, E. Gasser, X. Zhan, F. Cusanno, F. Butaru, Pete Markowitz, P. E. Reimer, K. Wang, Lindsay Glesener, P. Carter, M. Posik, S. Abrahamyan, P. Monaghan, Peter S. LaViolette, B. Babineau, Simon Širca, A. Giusa, John Arrington, X. Yan, F. Garibaldi, Nilanga Liyanage, L. Lagamba, Kent Paschke, Olfred Hansen, T. Holmstrom, S. Fuchs, D. Flay, M. Mazouz, Richard Wilson, R. Suleiman, V. Ziskin, J. Leacock, Fatiha Benmokhtar, P. Solvignon, Mustafa Canan, Amber McCreary, J. R. Hoskins, R. De Leo, A. V. Glamazdin, Antonin Vacheret, A. Acha, L. Mercado, Seonho Choi, R. S. Beminiwattha, Paul Souder, Diana Parno, R. Snyder, D. Lambert, Whitney Armstrong, X. Deng, Z. E. Meziani, S. L. Bailey, N. Lubinsky, G. D. Cates, J. Gomez, D. Wang, Juliette Mammei, C. Muñoz-Camacho, K. A. Aniol, Jongmin Lee, P. Bosted, Bryan J. Moffit, B. Sawatzky, R. J. Feuerbach, R. I. Pomatsalyuk, A. Deur, D. McNulty, Arijit Saha, Ronald Gilman, A. Whitbeck, X. Jiang, Jay Benesch, J. Hansknecht, C. Gu, Z. Ye, Bogdan Wojtsekhowski, Xin Qian, Vladimir Nelyubin, Andrei Afanasev, C. Ferdi, K. Kliakhandler, D. G. Meekins, H. Benaoum, H. F. Ibrahim, W. Troth, K. Prok, A. Camsonne, Ping Zhu, L. J. Kaufman, Chunhui Chen, Vincent Sulkosky, J. Cahoon, K. Fuoti, Dipangkar Dutta, Nuruzzaman, T. B. Humensky, P. Decowski, P. E. Ulmer, Y. C. Chao, K. McCormick, A. Kelleher, G. Jin, Abdurahim Rakhman, R. Silwal, Y. X. Ye, X. Zheng, J. Grames, Mikhail Gorchtein, C. C. Chang, K. S. Kumar, W. U. Boeglin, P. Rogan, E. Chudakov, M. Potokar, Or Hen, Karl Slifer, 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, 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), HAPPEX, 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, 010308 nuclear & particles physics, Scattering, media_common.quotation_subject, FOS: Physical sciences, General Physics and Astronomy, Elastic electron, chemistry.chemical_element, Electron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Asymmetry, Amplitude, chemistry, Excited state, 0103 physical sciences, Nuclear Experiment (nucl-ex), Atomic physics, 010306 general physics, Nuclear Experiment, Helium, media_common
Abstract

We have measured the beam-normal single-spin asymmetry $A_n$ in the elastic scattering of 1-3 GeV transversely polarized electrons from $^1$H and for the first time from $^4$He, $^{12}$C, and $^{208}$Pb. For $^1$H, $^4$He and $^{12}$C, the measurements are in agreement with calculations that relate $A_n$ to the imaginary part of the two-photon exchange amplitude including inelastic intermediate states. Surprisingly, the $^{208}$Pb result is significantly smaller than the corresponding prediction using the same formalism. These results suggest that a systematic set of new $A_n$ measurements might emerge as a new and sensitive probe of the structure of heavy nuclei., 5 pages, 3 figures, accepted by PRL. v3: fixed one author name and affiliation, otherwise no change

Published
2012
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35. 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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36. 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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37. 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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38. 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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39. Preliminary Results from Integrating Compton Photon Polarimetry in Hall A of Jefferson Lab

Author

G. B. Franklin, R. Michaels, Paul Souder, Fatiha Benmokhtar, S. K. Nanda, Diana Parno, M. Friend, and B. P. Quinn

Subjects
History, Photon, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, media_common.quotation_subject, Polarimetry, FOS: Physical sciences, Physics::Optics, Electron, Asymmetry, Education, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Optics, Nuclear Experiment (nucl-ex), Nuclear Experiment, media_common, Physics, business.industry, Polarimeter, Instrumentation and Detectors (physics.ins-det), Polarization (waves), Computer Science Applications, Cathode ray, Physics::Accelerator Physics, business, Nucleon
Abstract

A wide range of nucleon and nuclear structure experiments in Jefferson Lab's Hall A require precise, continuous measurements of the polarization of the electron beam. In our Compton polarimeter, electrons are scattered off photons in a Fabry-Perot cavity; by measuring an asymmetry in the integrated signal of the scattered photons detected in a GSO crystal, we can make non-invasive, continuous measurements of the beam polarization. Our goal is to achieve 1% statistical error within two hours of running. We discuss the design and commissioning of an upgrade to this apparatus, and report preliminary results for experiments conducted at beam energies from 3.5 to 5.9 GeV and photon rates from 5 to 100 kHz., 6 pages, 7 figures. To appear in the Proceedings of the International Nuclear Physics Conference (INPC 2010), July 4-9 2010, Vancouver, Canada (Journal of Physics: Conference Series)

Published
2011

40. 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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41. 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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42. Roentgenographic cephalometry - an aid in unsuspected abnormalities

Author

S K, Nanda, W W, Merow, and H E, Martin

Subjects
Male, Incidental Findings, Adolescent, Cephalometry, Skull, Skull Neoplasms, Mucocele, Basal Cell Nevus Syndrome, Maxillary Sinus, Foreign Bodies, Facial Bones, Diagnosis, Differential, Radiography, Craniopharyngioma, Paranasal Sinus Diseases, Humans, Female, Pituitary Neoplasms, Bone Diseases, Nasal Cavity, Child
Published
2009

43. High-Resolution Spectroscopy ofNΛ16by Electroproduction

Author

P. E. Ulmer, B. Kross, Maryam Moteabbed, J. Reinhold, R. Roche, Pavlo Baturin, H. Benaoum, H. F. Ibrahim, E. Voutier, Toshinobu Miyoshi, Bogdan Wojtsekhowski, B. Craver, E. Chudakov, P. Ambrozewicz, J. P. Chen, F. Giuliani, P.Y. Bertin, Y. Okasyasu, Olivier Gayou, S. K. Nanda, F. Cusanno, D. Hayes, C. E. Hyde, Yujie Qiang, P. E. Reimer, A. Deur, K. I. Blomqvist, M. Sotona, W. U. Boeglin, T. Holmstrom, G. M. Urciuoli, P. Solvignon, Kent Paschke, Alexandre Camsonne, P. Monaghan, L. J. Kaufman, H. Breuer, C. F. Perdrisat, S. Marrone, Eugenio Nappi, A. Acha, R. Michaels, C. Zorn, K. Kino, D. J. Margaziotis, L. Lagamba, C. Munoz Camacho, Pete Markowitz, E. Folts, A. J. Sarty, S. Frullani, Vladimir Nelyubin, D. J. Millener, A. Saha, M. Gricia, R. De Leo, Brian Raue, Simon Širca, M. Lucentini, F. Garibaldi, Tohru Suzuki, J. Segal, E. Cisbani, Mauro Iodice, P. Bydzovsky, H. Ueno, R. Fratoni, B. Reitz, Douglas Higinbotham, J. Gomez, R. Snyder, X. Jiang, X. Zeng, C. W. de Jager, R. J. Feuerbach, P. Veneroni, E. Piasetzky, C. Ferdi, K. A. Aniol, Bryan J. Moffit, Jaideep Singh, Seonho Choi, K. McCormick, R. Subedi, R. A. Lindgren, J. J. LeRose, V. Sulkosky, L. Coman, J.-O. Hansen, B. E. Norum, C. C. Chang, Z. E. Meziani, P. Brindza, V. A. Punjabi, G. de Cataldo, A. Shahinyan, F. Santavenere, S. Colilli, and V. M. Rodriguez

Subjects
Physics, 010308 nuclear & particles physics, Binding energy, General Physics and Astronomy, Sigma, Halo nucleus, Lambda, Hypernucleus, 01 natural sciences, 0103 physical sciences, Atomic physics, Thin film, 010306 general physics, Spectroscopy, Energy (signal processing)
Abstract

An experimental study of the 16O(e,e'K^+)16N_Lambda reaction has been performed at Jefferson Lab. A thin film of falling water was used as a target. This permitted a simultaneous measurement of the p(e,e'K^+)Lambda,Sigma_0 exclusive reactions and a precise calibration of the energy scale. A ground-state binding energy of 13.76 +/- 0.16 MeV was obtained for 16N_Lambda with better precision than previous measurements on the mirror hypernucleus 16O_Lambda. Precise energies have been determined for peaks arising from a Lambda in s and p orbits coupled to the p_{1/2} and p_{3/2} hole states of the 15N core nucleus.

Published
2009
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44. 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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45. 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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46. 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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47. 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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48. 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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49. 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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50. Scaling Tests of the Cross Section for Deeply Virtual Compton Scattering

Author

Z. E. Meziani, F. Sabatié, Ronald Gilman, K. McCormick, P. Monaghan, H. Benaoum, H. F. Ibrahim, G. Laveissière, R. Subedi, Bogdan Wojtsekhowski, R. Michaels, Paul Gueye, R. A. Lindgren, B. Michel, V. Sulkosky, D. Hayes, M. Brossard, J.-M. Fieschi, C. W. de Jager, K. A. Aniol, C. Munoz Camacho, Olivier Gayou, B. Craver, Bryan J. Moffit, M. Beaumel, B. Guillon, Douglas Higinbotham, E. Chudakov, D. J. Margaziotis, M. Amarian, G. Gavalian, T. Holmstrom, Y. Roblin, X. Jiang, K. Wang, M. Mazouz, Arijit Saha, G. J. Kumbartzki, P. A. M. Guichon, Ronald Ransome, A. Kolarkar, B. Reitz, H. S. Jo, C. E. Hyde-Wright, M. Garçon, R. J. Feuerbach, L. J. Kaufman, R. Igarashi, Nilanga Liyanage, E. Kuchina, C. Ferdi, A. Kelleher, Karl Slifer, Larry Weinstein, J. Gomez, J. P. Chen, P.Y. Bertin, S. Frullani, J. S. Real, J. LeRose, F. Cusanno, A. Deur, Houbing Lu, P. Solvignon, Vladimir Nelyubin, Simon Širca, F. Garibaldi, E. Voutier, J. Roche, S. K. Nanda, Yujie Qiang, M. Potokar, P. E. Ulmer, Olfred Hansen, X. Zheng, L. Y. Zhu, Alexandre Camsonne, 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), 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), 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), HALL A, Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
Quark, Physics, Particle physics, 010308 nuclear & particles physics, Compton scattering, FOS: Physical sciences, 13.60.Fz, 13.40.Gp, 14.20.Dh, 13.60.Hb, General Physics and Astronomy, Parton, HERA, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Helicity, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment, 010306 general physics, Nucleon, Linear combination, Scaling
Abstract

We present the first measurements of the \vec{e}p->epg cross section in the deeply virtual Compton scattering (DVCS) regime and the valence quark region. The Q^2 dependence (from 1.5 to 2.3 GeV^2) of the helicity-dependent cross section indicates the twist-2 dominance of DVCS, proving that generalized parton distributions (GPDs) are accessible to experiment at moderate Q^2. The helicity-independent cross section is also measured at Q^2=2.3 GeV^2. We present the first model-independent measurement of linear combinations of GPDs and GPD integrals up to the twist-3 approximation., 5 pages, 4 figures, 2 tables. Text shortened for publication. References added. One figure removed

Published
2006
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