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51. Automated calibration system for a high-precision measurement of neutrino mixing angle θ_(13) with the Daya Bay antineutrino detectors

Author: D. A. Dwyer, Guisen Li, R. D. McKeown, R. H.M. Tsang, Wei Wang, R. Carr, Xin Qian, W. Q. Gu, Bei Cai, Chao Zhang, Jianglai Liu, and F. F. Wu
Subjects: Physics, Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, business.industry, Physics::Instrumentation and Detectors, Daya bay, Detector, Daya Bay Reactor Neutrino Experiment, Scintillator, Nuclear physics, Robotic systems, Optics, Calibration, High Energy Physics::Experiment, Neutrino, business, Instrumentation, Mixing (physics)
Abstract: We describe the automated calibration system for the antineutrino detectors in the Daya Bay Neutrino Experiment. This system consists of 24 identical units instrumented on 8 identical 20-ton liquid scintillator detectors. Each unit is a fully automated robotic system capable of deploying an LED and various radioactive sources into the detector along given vertical axes. Selected results from performance studies of the calibration system are reported.
Published: 2014

52. Spectral Measurement of Electron Antineutrino Oscillation Amplitude and Frequency at Daya Bay

Author: J. B. Jiao, M. Qi, S. R. Ely, R. T. Lei, H. Z. Huang, M. Bishai, D. W. Liu, Minfang Yeh, V. Pec, S. Hans, Yk Hor, S. J. Patton, W. Q. Gu, H. S. Chen, W. L. Zhong, B. Roskovec, F. H. Zhang, H. X. Huang, F. Li, Jiawen Zhang, Xin Heng Guo, K. M. Heeger, Yi Wei, K. V. Tsang, Miao He, Michael Kramer, Z. P. Zhang, Y. B. Liu, H. J. Jiang, H. Y. Wei, Huo Yan Chen, Igor Nemchenok, Zhijian Zhang, L. Zheng, R. Carr, Y. P. Cheng, J. K. Xia, Xingtao Huang, R. G. Wang, Wing-Hon Lai, D. M. Webber, Changgen Yang, Y. Zhang, Xubo Ma, Jinjuan Ren, Q. J. Li, J. Napolitano, F. P. An, B. Ren, X. C. Chen, Y. H. Zhang, X. L. Ji, P. Hinrichs, Liang Zhan, R. W. Hackenburg, Z. Wang, Zheng Wang, Jin Yu, L. Q. Ge, B. B. Shao, Y. H. Tam, X. Wang, Zhongyuan Zhou, J. J. Cherwinka, T. Kwok, Guey-Lin Lin, Chun S. J. Pun, Haoqi Lu, Dejun Li, B. Z. Hu, Simon Blyth, K. Lau, Tao Hu, Rupert Leitner, Yue Meng, Kam-Biu Luk, S. H. Kettell, C. Lu, J. L. Xu, X. P. Ji, Y. A. Gornushkin, S. K. Lin, R. L. Brown, Y. C. Zhang, M. Z. Wang, L. J. Hu, L. S. Littenberg, Zhi Ning, Ming Chung Chu, W. Hu, Lawrence Pinsky, L. Lebanowski, Y. Y. Ding, Liangjian Wen, Qingmin Zhang, B. R. Littlejohn, X. F. Du, Shaomin Chen, Jun Cao, A. B. Balantekin, Zeyuan Yu, Y. Xu, E. C. Huang, Li Zhou, N. Y. Wang, J. L. Sun, L. E. Piilonen, K. T. McDonald, L. Y. Wang, Guofu Cao, M. C. McFarlane, Dmitry V. Naumov, L. Kang, W. C. Lai, B. Viren, Vit Vorobel, Q. W. Zhao, Maxim Gonchar, Z. Isvan, Wei Li, S. Jetter, R. A. Johnson, L. H. Whitehead, Xiaoyuan Chen, X. N. Li, R. H.M. Tsang, Richard Rosero, Yanchu Wang, X. Q. Li, H. Liu, J. M. Link, J. P. Cummings, K. K. Kwan, Ilya Butorov, M. V. Diwan, E. Draeger, J. J. Ling, Zhiyong Zhang, C. A. Lewis, H. L. Zhuang, A. G. Olshevski, Y. Nakajima, M. W. Kwok, Wenjie Wang, Mengsu Yang, K. Whisnant, E. T. Worcester, J. de Arcos, S. Trentalange, Guisen Li, Honghan Gong, Z. Y. Deng, W. K. Ngai, Qingming Ma, H. K. Tanaka, Yu-leung Chan, Qinglong Wu, Siew Cheng Wong, Min-Xin Guan, X. Tang, Yi Chen, W. P. Wang, Jiaheng Zou, Tian Xue, C. White, C. H. Wang, D. E. Jaffe, G. Y. Yu, Yufeng Li, Y. K. Heng, W. R. Edwards, Y. S. Yeh, S. L. Zang, J. K. C. Leung, Y. H. Chang, Zhibing Li, G. X. Sun, X. C. Ruan, L. M. Hu, Chao Zhang, G. H. Han, S. H. Zhang, D. M. Xia, C. Chasman, Y. B. Hsiung, Lin Yang, O. D. Tsai, Jinmei Liu, Jing Zhao, X. Y. Ma, J. Y. Xu, I. Mitchell, Y. C. Tung, L. S. Wang, S. J. Chen, Jianglai Liu, Xin Qian, R. L. Hahn, Zhi-zhong Xing, J. Y. Fu, T. Wise, L. Z. Wang, F. Z. Qi, J. F. Chang, Jen-Chieh Peng, X. Xia, H. Themann, Guanghua Gong, Chi Lin, P. Jaffke, W. Beriguete, Yi-Fang Zhao, M. H. Ye, Juan Pedro Ochoa-Ricoux, H. R. Band, H. Liang, Yixue Chen, N. Raper, C. E. Tull, G. Hussain, S. S. Liu, J. Lee, H. L. H. Wong, Y. X. Zhang, J. Xu, A. Leung, Y. C. Lin, J. Yan, R. D. McKeown, H. Y. Ngai, R. L. Gill, Patrick Huber, Bing-Lin Young, E. Naumova, D. A. Dwyer, H. M. Steiner, and Y. Q. Ma
Subjects: Physics, Oscillation, FOS: Physical sciences, General Physics and Astronomy, Daya Bay Reactor Neutrino Experiment, Electron, Spectral line, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Muon neutrino, Nuclear Experiment (nucl-ex), Nuclear Experiment, Oscillation amplitude, Electron neutrino, Energy (signal processing)
Abstract: A measurement of the energy dependence of antineutrino disappearance at the Daya Bay Reactor Neutrino Experiment is reported. Electron antineutrinos ($\overline{\nu}_{e}$) from six $2.9$ GW$_{\rm th}$ reactors were detected with six detectors deployed in two near (effective baselines 512 m and 561 m) and one far (1579 m) underground experimental halls. Using 217 days of data, 41589 (203809 and 92912) antineutrino candidates were detected in the far hall (near halls). An improved measurement of the oscillation amplitude $\sin^{2}2\theta_{13} = 0.090^{+0.008}_{-0.009} $ and the first direct measurement of the $\overline{\nu}_{e}$ mass-squared difference $|\Delta m^{2}_{ee}|= (2.59_{-0.20}^{+0.19}) \times 10^{-3}\ {\rm eV}^2 $ is obtained using the observed $\overline{\nu}_{e}$ rates and energy spectra in a three-neutrino framework. This value of $|\Delta m^{2}_{ee}|$ is consistent with $|\Delta m^{2}_{\mu\mu}|$ measured by muon neutrino disappearance, supporting the three-flavor oscillation model., Comment: As accepted for publication by Phys. Rev. Lett. including ancillary table
Published: 2014
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53. Search for a light sterile neutrino at daya bay

Author: Kirk T. McDonald, L. S. Wang, J. Y. Fu, A. G. Olshevski, E. Draeger, T. Wise, M. V. Diwan, H. L. Zhuang, Xi Chen, X. Q. Li, W. C. Lai, E. T. Worcester, F. Li, J. de Arcos, J. Monari Kebwaro, J. J. Cherwinka, Bing-Lin Young, Yi Chen, J. F. Chang, X. Tang, Jianglai Liu, R. H.M. Tsang, Y. Xu, E. C. Huang, Yu Zhang, Juan Pedro Ochoa-Ricoux, Yu-leung Chan, L. Lebanowski, Y. Y. Ding, Y. Zhao, C. H. Wang, Z. B. Li, S. H. Kettell, Yufeng Li, V. Pec, P. Y. Lin, J. J. Ling, E. Naumova, D. A. Dwyer, Q. W. Zhao, Yi Wei, S. Hans, Y. K. Hor, Marco Grassi, Miao He, K. K. Kwan, Ilya Butorov, Patrick Huber, G. X. Sun, Christopher C. Yang, Jen-Chieh Peng, X. C. Ruan, Y. S. Yeh, H. M. Steiner, Chao Zhang, Xin Qian, W. Zhong, C. A. Lewis, X. Xia, L. M. Hu, Lin Yang, G. H. Han, H. Themann, Jinmei Liu, K. B. Luk, Baoqing Zeng, J. B. Jiao, K. Whisnant, Maxim Gonchar, Xiao-yan Li, Guanghua Gong, Jing Zhao, D. E. Jaffe, Vit Vorobel, Z. Isvan, Chi Lin, Zhi-zhong Xing, X. Y. Ma, J. Y. Xu, S. L. Zang, A. B. Balantekin, Wei Li, I. Mitchell, R. A. Johnson, J. K. C. Leung, H. S. Chen, Jinjuan Ren, Q. J. Li, J. Xu, Y. C. Tung, X. P. Ji, Jiawen Zhang, H. Liu, Y. H. Tam, X. Wang, J. L. Sun, R. T. Lei, Qingmin Zhang, H. R. Band, H. Liang, Yixue Chen, Chun S. J. Pun, B. B. Shao, Haoqi Lu, Dejun Li, Q. X. Zhang, Shaomin Chen, Jun Cao, Q. Y. Chen, J. Cummings, H. Y. Wei, Zhiyong Zhang, Min-Xin Guan, Y. P. Cheng, Jim Napolitano, S. H. Zhang, Michael Kramer, D. M. Xia, M. C. McFarlane, Xubo Ma, R. W. Hackenburg, Li Chang, N. Raper, Dmitry V. Naumov, Xiaohu Guo, Z. Wang, Rupert Leitner, M. T. Yang, C. Chasman, Zeyuan Yu, W. R. Edwards, Jin Yu, Y. B. Hsiung, G. Y. Yu, T. Kwok, Guey-Lin Lin, L. Q. Ge, Qinglong Wu, R. D. McKeown, F. Z. Qi, Y. Ma, Zhongyuan Zhou, L. Kang, B. R. Littlejohn, Y. H. Chang, P. Jaffke, W. Beriguete, Y. Wang, X. F. Du, Tian Xue, Wei Wang, F. H. Zhang, Christopher G. White, Z. P. Zhang, Y. B. Liu, H. J. Jiang, H. Z. Huang, K. L. Jen, Y. K. Heng, Zheng Wang, S. J. Patton, W. Q. Gu, S. K. Lin, Liangjian Wen, Guofu Cao, Tao Hu, N. Y. Wang, R. G. Wang, D. M. Webber, X. L. Ji, Y. H. Zhang, Liang Zhan, G. Hussain, B. Viren, Li Zhou, C. E. Tull, S. S. Liu, J. Lee, H. L. H. Wong, Y. X. Zhang, A. Leung, Y. C. Lin, J. Yan, H. Y. Ngai, R. L. Gill, Richard Rosero, Y. Nakajima, M. W. Kwok, Wenjie Wang, K. V. Tsang, Lawrence Pinsky, L. Y. Wang, M. H. Ye, Guisen Li, Honghan Gong, Z. Y. Deng, Qingming Ma, Siew Cheng Wong, Jiaheng Zou, Igor Nemchenok, Zhijian Zhang, L. Zheng, F. P. An, B. Ren, Yue Meng, L. J. Hu, D. W. Liu, Minfang Yeh, B. Roskovec, J. K. Xia, K. M. Heeger, Kwong Lau, Mengsu Yang, Y. Zhang, P. Hinrichs, C. Lu, J. L. Xu, L. H. Whitehead, J. M. Link, Xingtao Huang, M. Qi, S. R. Ely, M. Bishai, Yaolin Zhao, L. S. Littenberg, Zhi Ning, B. Z. Hu, Simon Blyth, M. Z. Wang, Ming Chung Chu, W. Hu, L. E. Piilonen, and S. Jetter
Subjects: Physics, Sterile neutrino, Oscillation, Daya bay, FOS: Physical sciences, General Physics and Astronomy, Spectral distortion, Daya Bay Reactor Neutrino Experiment, Electron, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Neutrino, Neutrino oscillation
Abstract: A search for light sterile neutrino mixing was performed with the first 217 days of data from the Daya Bay Reactor Antineutrino Experiment. The experiment's unique configuration of multiple baselines from six 2.9~GW$_{\rm th}$ nuclear reactors to six antineutrino detectors deployed in two near (effective baselines 512~m and 561~m) and one far (1579~m) underground experimental halls makes it possible to test for oscillations to a fourth (sterile) neutrino in the $10^{\rm -3}~{\rm eV}^{2} < |\Delta m_{41}^{2}| < 0.3~{\rm eV}^{2}$ range. The relative spectral distortion due to electron antineutrino disappearance was found to be consistent with that of the three-flavor oscillation model. The derived limits on $\sin^22\theta_{14}$ cover the $10^{-3}~{\rm eV}^{2} \lesssim |\Delta m^{2}_{41}| \lesssim 0.1~{\rm eV}^{2}$ region, which was largely unexplored., Comment: 7 pages, 4 figures
Published: 2014

54. P<scp>ARITY</scp>-V<scp>IOLATING</scp> E<scp>LECTRON</scp> S<scp>CATTERING AND</scp> N<scp>UCLEON</scp> S<scp>TRUCTURE</scp>

Author: Douglas H Beck and R. D. McKeown
Subjects: Quark, Physics, Nuclear and High Energy Physics, Particle physics, Series (mathematics), 010308 nuclear & particles physics, Scattering, Formalism (philosophy), Nuclear Theory, FOS: Physical sciences, Parity (physics), 01 natural sciences, Helicity, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, 010306 general physics, Nucleon, Electron scattering
Abstract: The measurement of parity violation in the helicity dependence of electron-nucleon scattering provides unique information about the basic quark structure of the nucleons. In this review, the general formalism of parity-violating electron scattering is presented, with emphasis on elastic electron-nucleon scattering. The physics issues addressed by such experiments is discussed, and the major goals of the presently envisioned experimental program are identified. %General aspects of the experimental technique are reviewed and A summary of results from a recent series of experiments is presented and the future prospects of this program are also discussed., 45 pages, 9 figures
Published: 2001
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55. Transverse AsymmetryAT′from the Quasielastic3He→(e→,e′)Process and the Neutron Magnetic Form Factor

Author: J. Yeh, B. W. Filippone, William Bertozzi, Wolfgang Korsch, K. McIlhany, K. McCormick, M. Schnee, K. Kramer, L. Todor, T. Pavlin, R. I. Pomatsalyuk, L. Cardman, Jacek Golak, Nilanga Liyanage, F. W. Hersman, Branislav Vlahovic, R. Suleiman, A. Deur, Steffen Strauch, R. D. McKeown, J. O. Hansen, D. J. Margaziotis, J. Gomez, Bogdan Wojtsekhowski, Jian-Ping Chen, T. Averett, Charles Glashausser, de Jager Cw, Y. Roblin, D. Pripstein, W. Xu, J. S. Jensen, M. Sutter, I. K. Kominis, M. Liang, C. Crawford, Hiroyuki Kamada, Dipanwita Dutta, W. Glöckle, A. V. Glamazdin, Z. Chai, M. Viviani, Sebastien Incerti, C. F. Williamson, Gordon D. Cates, E. Lakuriqi, F. Xiong, B. Humensky, E. W. Hughes, Henryk Witała, G. G. Petratos, R. Michaels, B. D. Anderson, E. Pace, J. W. Watson, D. S. Dale, Jones Ce, Z. E. Meziani, B. Tipton, Ronald Ransome, G. S. Corrado, L. Auberbach, J. J. LeRose, A. Kievsky, V. Gorbenko, T. Black, Xin Jiang, R. Holmes, R. Kahl, D. W. Higinbotham, G. Salme, S. Churchwell, P. A. Zolnierczuk, J. M. Finn, G. Kumbartzki, C. R. Howell, J. R. Calarco, E. Chudakov, P. Djawotho, Karl Slifer, Haiyan Gao, Paul Souder, T. Shin, M. Rvachev, J. W. Martin, Seonho Choi, S. Malov, Ronald Gilman, M. K. Jones, A. Saha, G. W. Miller, M. Kuss, and David L. Prout
Subjects: Nuclear physics, Physics, Transverse plane, Quasielastic scattering, Experimental uncertainty analysis, media_common.quotation_subject, Magnetic form factor, General Physics and Astronomy, Neutron, Asymmetry, Polarized target, media_common
Abstract: We have measured the transverse asymmetry A_T′ in ^3He(e,e′) quasielastic scattering in Hall A at Jefferson Laboratory with high precision for Q^2 values from 0.1 to 0.6 (GeV/c)^2. The neutron magnetic form factor GMn was extracted based on Faddeev calculations for Q^2 = 0.1 and 0.2 (GeV/c)^2 with an experimental uncertainty of less than 2%.
Published: 2000
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56. An energy feedback system for the MIT/Bates linear accelerator

Author: D. Barkhuff, G. W. Dodson, C. Tschalaer, B. Mueller, E. J. Beise, D. T. Spayde, S. Kowalski, S. P. Wells, A. Zolfaghari, T. Averett, Douglas H Beck, R. D. McKeown, D. Cheever, and Michael Pitt
Subjects: Physics, Nuclear and High Energy Physics, business.industry, Electrical engineering, FOS: Physical sciences, BATES, Line (electrical engineering), Linear particle accelerator, Energy feedback, Nuclear Experiment (nucl-ex), business, Nuclear Experiment, Instrumentation, Energy (signal processing), Order of magnitude, Voltage
Abstract: We report the development and implementation of an energy feedback system for the MIT/Bates Linear Accelerator Center. General requirements of the system are described, as are the specific requirements, features, and components of the system unique to its implementation at the Bates Laboratory. We demonstrate that with the system in operation, energy fluctuations correlated with the 60 Hz line voltage and with drifts of thermal origin are reduced by an order of magnitude.
Published: 2000
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57. Measurement of the Spin Asymmetry in the Photoproduction of Pairs of High-pTHadrons at HERMES

Author: A. Airapetian, N. Akopov, M. Amarian, E. C. Aschenauer, H. Avakian, R. Avakian, A. Avetissian, B. Bains, C. Baumgarten, M. Beckmann, S. Belostotski, J. E. Belz, Th. Benisch, S. Bernreuther, N. Bianchi, J. Blouw, H. Böttcher, A. Borissov, J. Brack, S. Brauksiepe, B. Braun, W. Brückner, A. Brüll, H. J. Bulten, G. P. Capitani, P. Carter, P. Chumney, E. Cisbani, G. R. Court, P. F. Dalpiaz, E. De Sanctis, D. De Schepper, E. Devitsin, P. K. A. de Witt Huberts, P. Di Nezza, M. Düren, A. Dvoredsky, G. Elbakian, J. Ely, A. Fantoni, M. Ferstl, K. Fiedler, B. W. Filippone, H. Fischer, B. Fox, J. Franz, S. Frullani, M.-A. Funk, Y. Gärber, F. Garibaldi, G. Gavrilov, P. Geiger, V. Gharibyan, A. Golendukhin, G. Graw, O. Grebeniouk, P. W. Green, L. G. Greeniaus, C. Grosshauser, M. Guidal, A. Gute, W. Haeberli, J.-O. Hansen, D. Hasch, O. Häusser, F. H. Heinsius, R. Henderson, M. Henoch, R. Hertenberger, Y. Holler, R. J. Holt, W. Hoprich, H. Ihssen, M. Iodice, A. Izotov, H. E. Jackson, A. Jgoun, R. Kaiser, E. Kinney, A. Kisselev, P. Kitching, H. Kobayashi, N. Koch, K. Königsmann, M. Kolstein, H. Kolster, V. Korotkov, W. Korsch, V. Kozlov, L. H. Kramer, M. Kurisuno, G. Kyle, W. Lachnit, W. Lorenzon, N. C. R. Makins, F. K. Martens, J. W. Martin, F. Masoli, A. Mateos, M. McAndrew, K. McIlhany, R. D. McKeown, F. Meissner, F. M. Menden, A. Metz, N. Meyners, O. Mikloukho, C. A. Miller, M. A. Miller, R. Milner, A. Most, V. Muccifora, Y. Naryshkin, A. M. Nathan, F. Neunreither, M. Niczyporuk, W.-D. Nowak, T. G. O'Neill, R. Openshaw, J. Ouyang, B. R. Owen, S. F. Pate, S. Potashov, D. H. Potterveld, G. Rakness, R. Redwine, A. R. Reolon, R. Ristinen, K. Rith, P. Rossi, S. Rudnitsky, M. Ruh, D. Ryckbosch, Y. Sakemi, C. Scarlett, A. Schäfer, F. Schmidt, H. Schmitt, G. Schnell, K. P. Schüler, A. Schwind, J. Seibert, T.-A. Shibata, K. Shibatani, T Shin, V. Shutov, C. Simani, A. Simon, K. Sinram, P. Slavich, M. Spengos, E. Steffens, J. Stenger, J. Stewart, U. Stoesslein, M. Sutter, H. Tallini, S. Taroian, A. Terkulov, B. Tipton, M. Tytgat, G. M. Uriuoli, R. van de Vyver, J. F. J. van den Brand, G. van der Steenhoven, J. J. van Hunen, M. C. Vetterli, V. Vikhrov, M. G. Vincter, J. Visser, E. Volk, W. Wander, J. Wendland, S. E. Williamson, T. Wise, K. Woller, S. Yoneyama, and H. Zohrabian
Subjects: HERMES experiment, Physics, Particle physics, media_common.quotation_subject, Hadron, General Physics and Astronomy, HERA, Polarization (waves), Deep inelastic scattering, Asymmetry, Gluon, Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment, Storage ring, media_common
Abstract: We present a measurement of the longitudinal spin asymmetry A|| in photoproduction of pairs of hadrons with high transverse momentum pT. Data were accumulated by the HERMES experiment using a 27.5 GeV polarized positron beam and a polarized hydrogen target internal to the HERA storage ring. For h^+h^- pairs with _(pT)^(h1)>1.5GeV/c and _(pT)^(h2)>1.0GeV/c, the measured asymmetry is A_(||) = -0.28±0.12(stat)±0.02(syst). This negative value is in contrast to the positive asymmetries typically measured in deep inelastic scattering from protons, and is interpreted to arise from a positive gluon polarization.
Published: 2000
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58. Spin and strangeness in the nucleon

Author: Robert D. McKeown
Subjects: Quantum chromodynamics, Quark, Physics, Nuclear and High Energy Physics, Strange quark, Particle physics, Spin polarization, High Energy Physics::Lattice, High Energy Physics::Phenomenology, Nuclear Theory, Strangeness, Deep inelastic scattering, Electron magnetic dipole moment, Gluon, Spin magnetic moment, Baryon, Nuclear physics, Nuclear magnetic moment, High Energy Physics::Experiment, Nuclear Experiment, Nucleon, Spin-½
Abstract: The spin and magnetic moment of the nucleon arise from the quark-gluon constituents and the properties of Quantum Chromodynamics. Over the last decade, the results of spin dependent deep inelastic scattering experiments have indicated that the quark spin contribution is a small fraction of the total spin of the nucleon. This initially surprising result has been interpreted as due to a substantial negative polarization of the strange quark-antiquark sea or as evidence of a sizeable gluon polarization. Further experimental studies are underway to address these issues. The magnetic moment of the nucleon may also contain contributions from strange quarks, and this aspect of nucleon structure is being studied via parity-violating electron scattering. The present status of these experimental efforts and their impact on our knowledge of nucleon structure is discussed.
Published: 2000
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59. Electron beam position stabilization with a piezo-electric optical correction system

Author: Michael Pitt, T. Averett, C. E. Jones, and R. D. McKeown
Subjects: Physics, Nuclear and High Energy Physics, business.industry, Parity (physics), Electron, Laser, Signal, Helicity, Linear particle accelerator, law.invention, Optics, law, Position (vector), Cathode ray, Atomic physics, business, Instrumentation
Abstract: A piezo-electrically controlled optical correction system was successfully used to reduce the helicity-correlated pulse-to-pulse position differences of a laser spot to better than ±100 nm at a pulse rate of 600 Hz. Using a simple feedback algorithm, average position differences of Δ x =−3.5±4.2 nm and Δ y =2.6±6.6 nm were obtained over a 6 h period. This optical correction system was successfully used in the polarized electron source at the Bates Linear Accelerator Center to stabilize the position of the electron beam during the recent SAMPLE experiment. Because this experiment measures a parity violating signal at the 10−6 level, it is sensitive to systematic effects which are correlated with the helicity of the incident electrons. One potentially large systematic effect is the helicity-correlated motion of the incident electron beam. By using this optical correction system, electron beam position differences at the location of the experiment were routinely kept well below ±100 nm, with averages over the entire two month run of Δ x =6.4±2.3 nm and Δ y =−3.5±2.0 nm.
Published: 1999
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60. Observation of a Coherence Length Effect in Exclusiveρ0Electroproduction

Author: K. Ackerstaff, A. Airapetian, N. Akopov, I. Akushevich, M. Amarian, E. C. Aschenauer, H. Avakian, R. Avakian, A. Avetissian, B. Bains, S. Barrow, C. Baumgarten, M. Beckmann, St. Belostotski, J. E. Belz, Th. Benisch, S. Bernreuther, N. Bianchi, S. Blanchard, J. Blouw, H. Böttcher, A. Borissov, J. Brack, S. Brauksiepe, B. Braun, B. Bray, St. Brons, W. Brückner, A. Brüll, E. E. W. Bruins, H. J. Bulten, R. V. Cadman, G. P. Capitani, P. Carter, P. Chumney, E. Cisbani, G. R. Court, P. F. Dalpiaz, P. P. J. Delheij, E. De Sanctis, D. De Schepper, E. Devitsin, P. K. A. de Witt Huberts, P. Di Nezza, M. Düren, A. Dvoredsky, G. Elbakian, J. Ely, J. Emerson, A. Fantoni, A. Fechtchenko, M. Ferstl, D. Fick, K. Fiedler, B. W. Filippone, H. Fischer, H. T. Fortune, B. Fox, S. Frabetti, J. Franz, S. Frullani, M.-A. Funk, N. D. Gagunashvili, P. Galumian, H. Gao, Y. Gärber, F. Garibaldi, G. Gavrilov, P. Geiger, V. Gharibyan, V. Giordjian, A. Golendukhin, G. Graw, O. Grebeniouk, P. W. Green, L. G. Greeniaus, C. Grosshauser, M. G. Guidal, A. Gute, V. Gyurjyan, J. P. Haas, W. Haeberli, J.-O. Hansen, D. Hasch, O. Häusser, F. H. Heinsius, R. S. Henderson, Th. Henkes, M. Henoch, R. Hertenberger, Y. Holler, R. J. Holt, W. Hoprich, H. Ihssen, M. Iodice, A. Izotov, H. E. Jackson, A. Jgoun, C. Jones, R. Kaiser, E. Kinney, M. Kirsch, A. Kisselev, P. Kitching, H. Kobayashi, N. Koch, K. Königsmann, M. Kolstein, H. Kolster, V. Korotkov, W. Korsch, V. Kozlov, L. H. Kramer, B. Krause, V. G. Krivokhijine, M. Kückes, F. Kümmell, G. Kyle, W. Lachnit, W. Lorenzon, A. Lung, N. C. R. Makins, F. K. Martens, J. W. Martin, F. Masoli, A. Mateos, M. McAndrew, K. McIlhany, R. D. McKeown, F. Meissner, F. Menden, D. Mercer, A. Metz, N. Meyners, O. Mikloukho, C. A. Miller, M. A. Miller, R. G. Milner, V. Mitsyn, A. Most, R. Mozzetti, V. Muccifora, A. Nagaitsev, Y. Naryshkin, A. M. Nathan, F. Neunreither, M. Niczyporuk, W.-D. Nowak, M. Nupieri, P. Oelwein, H. Ogami, T. G. O'Neill, R. Openshaw, J. Ouyang, B. R. Owen, V. Papavassiliou, S. F. Pate, M. Pitt, H. R. Poolman, S. Potashov, D. H. Potterveld, B. Povh, G. Rakness, A. Reali, R. Redwine, A. R. Reolon, R. Ristinen, K. Rith, H. Roloff, G. Röper, P. Rossi, S. Rudnitsky, M. Ruh, D. Ryckbosch, Y. Sakemi, I. Savin, C. Scarlett, F. Schmidt, H. Schmitt, G. Schnell, K. P. Schüler, A. Schwind, J. Seibert, T.-A. Shibata, T. Shin, V. Shutov, C. Simani, A. Simon, K. Sinram, P. Slavich, J. Sowinski, M. Spengos, E. Steffens, J. Stenger, J. Stewart, F. Stock, U. Stoesslein, M. Sutter, H. Tallini, S. Taroian, A. Terkulov, D. M. Thiessen, E. Thomas, B. Tipton, A. Trudel, M. Tytgat, G. M. Urciuoli, J. J. van Hunen, R. van de Vyver, J. F. J. van den Brand, G. van der Steenhoven, M. C. Vetterli, V. Vikhrov, M. Vincter, J. Visser, E. Volk, W. Wander, T. P. Welch, S. E. Williamson, T. Wise, T. Wölfel, K. Woller, S. Yoneyama, K. Zapfe-Düren, H. Zohrabian, and R. Zurmühle
Subjects: Physics, HERMES experiment, Particle physics, Meson, 010308 nuclear & particles physics, High Energy Physics::Lattice, High Energy Physics::Phenomenology, Nuclear Theory, General Physics and Astronomy, Virtual particle, 01 natural sciences, Coherence length, Positron energy, Nuclear physics, Deuterium, Nuclear transparency, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Nucleon
Abstract: Exclusive incoherent electroproduction of the ρ0(770) meson from 1H, 2H, 3He, and 14N targets has been studied by the HERMES experiment at squared four-momentum transfer Q^2>0.4 GeV^2 and positron energy loss ν from 9 to 20 GeV. The ratio of the 14N to 1H cross sections per nucleon, known as the nuclear transparency, was found to decrease with increasing coherence length of quark-antiquark fluctuations of the virtual photon. The data provide clear evidence of the interaction of the quark-antiquark fluctuations with the nuclear medium.
Published: 1999
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61. Beam-induced nuclear depolarization in a gaseous polarized-hydrogen target

Author: Yasuhiro Sakemi, Valeri Valentinovitch Mitsyn, R. P. Redwine, G. van der Steenhoven, J. van Hunen, L. G. Greeniaus, A. Gute, L. H. Kramer, E. Volk, P. Chumney, S. Frullani, H. Schmitt, F. Stock, Ross Milner, T. A. Shibata, E. De Sanctis, R.O. Avakian, A. Metz, N. Koch, J. Franz, H. Kolster, M.-A. Funk, J.-O. Hansen, A.O. Mateos, A. Borissov, B. D. Fox, E. Devitsin, E. Cisbani, S. Potashov, H. Zohrabian, A. R. Reolon, A. Avetissian, K. McIlhany, I.A. Savin, K. Sinram, R. J. Holt, A. Izotov, T. Wise, F. Masoli, F. Neunreither, J. Blouw, S. Bernreuther, Alan M. Nathan, G.R. Court, F. Schmidt, R. V. Cadman, V. A. Korotkov, N.D. Gagunashvili, Y. Gärber, M. Beckmann, M. McAndrew, G. S. Kyle, H. J. Bulten, Michael Pitt, J. F. J. van den Brand, Th. Henkes, J. Stewart, V. Gharibyan, W. Haeberli, S. Frabetti, A. Brull, Brons, M. Ferstl, M. Sutter, M. Amarian, K. Ackerstaff, Klaus Rith, Robert Henderson, E. R. Kinney, Wolfgang Korsch, A. Reali, E. E. W. Bruins, H. Avakian, A. Airapetian, W. Wander, A. Dvoredsky, A. Nagaitsev, E. C. Aschenauer, H. E. Jackson, V. G. Krivokhijine, K. Königsmann, O. Häusser, G. P. Capitani, Y. Naryshkin, H. Ihssen, Michel Vetterli, M. Kolstein, Haiyan Gao, O. Grebeniouk, Ralf Hertenberger, M. Ruh, A. Schwind, A. Simon, F. K. Martens, M. Nupieri, G. Elbakian, W. Brückner, C. Baumgarten, M. Spengos, P. Di Nezza, S. Brauksiepe, N. Akopov, Michael Tytgat, V. Giordjian, A. Golendukhin, S. I. Manaenkov, M. A. Miller, G. Rakness, M. Henoch, P. Geiger, P. Slavich, V. A. Kozlov, S. Taroian, F. Meissner, P. Rossi, W. Lachnit, D. De Schepper, C. Grosshauser, R. A. Ristinen, Y. Holler, Alessandra Fantoni, N. Meyners, B. R. Owen, H.O. Roloff, P. F. Dalpiaz, G. Graw, D. Hasch, D. H. Potterveld, K. Zapfe-Düren, H. Böttcher, S. F. Pate, Jeffrey Brack, B. W. Filippone, F. Garibaldi, J. Stenger, D. Fick, J. E. Belz, R. D. McKeown, P.K.A. de Witt Huberts, M. Niczyporuk, A. Jgoun, Mauro Iodice, V. Papavassiliou, Belostotski, S. Yoneyama, R. Van de Vyver, G. M. Urciuoli, W.-D. Nowak, H. Ogami, T. Shin, Manuella Vincter, A. Kisselev, H. Tallini, Wolfgang Lorenzon, W. Hoprich, U. Stoesslein, H. Fischer, J. W. Martin, S. Rudnitsky, Dirk Ryckbosch, J. Sowinski, B. Tipton, Hiroaki Kobayashi, K. Fiedler, K. Woller, Thomas O'Neill, P.W. Green, B. Braun, K. P. Schüler, Nicola Bianchi, O. Mikloukho, V. Shutov, B. Bains, C. Simani, Naomi C R Makins, R. Mozzetti, Ralf Kaiser, E. Steffens, G. Gavrilov, A. Fechtchenko, B. Bray, P. Kitching, Th. Benisch, M. Düren, P. Carter, C. A. Miller, Adel Terkulov, Valeria Muccifora, G. Schnell, S. E. Williamson, and (Astro)-Particles Physics
Subjects: HERMES experiment, Physics, Hydrogen, General Physics and Astronomy, chemistry.chemical_element, FOS: Physical sciences, DESY, Depolarization, HERA, Magnetic field, High Energy Physics - Experiment, NO, High Energy Physics - Experiment (hep-ex), Bunches, chemistry, Physics::Accelerator Physics, High Energy Physics::Experiment, Atomic physics, Beam (structure)
Abstract: Spin-polarised atomic hydrogen is used as a gaseous polarised proton target in high energy and nuclear physics experiments operating with internal beams in storage rings. When such beams are intense and bunched, this type of target can be depolarised by a resonant interaction with the transient magnetic field generated by the beam bunches. This effect has been studied with the HERA positron beam in the HERMES experiment at DESY. Resonances have been observed and a simple analytic model has been used to explain their shape and position. Operating conditions for the experiment have been found where there is no significant target depolarisation due to this effect., REVTEX, 6 pages, 5 figures
Published: 1999
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62. The HERMES polarized 3He internal gas target

Author: F. Stock, C. E. Jones, D. DeSchepper, Ross Milner, A. Dvoredsky, T. Wise, L. H. Kramer, H. Tallini, Wolfgang Korsch, R. Carr, J. Stewart, J. W. Martin, J.-O. Hansen, G.R. Court, Y. Holler, Kisoo Lee, K. Zapfe-Düren, H. R. Poolman, T. Shin, G. Röper, K. Ackerstaff, S. F. Pate, Haiyan Gao, M. Niczyporuk, E. Steffens, J. Sowinski, J.F. Kelsey, R. D. McKeown, E. R. Kinney, B. Tipton, Michael Pitt, M. Sutter, A. Golendoukhin, and R. vanBommel
Subjects: Physics, HERMES experiment, Nuclear and High Energy Physics, Scattering, DESY, HERA, Polarization (waves), Nuclear physics, High Energy Physics::Experiment, Neutron, Atomic physics, Nucleon, Instrumentation, Storage ring
Abstract: The HERMES experiment is investigating the spin structure of the proton and neutron via deep-inelastic scattering of polarized positrons from polarized nuclear targets. The polarized positrons are provided by the HERA positron storage ring at DESY, Hamburg, Germany. The targets are pure internal gas targets. Data acquisition began in 1995, utilizing a polarized 3 He internal gas target to study the spin structure of the neutron. The target gas was polarized using the metastability-exchange optical-pumping technique and then injected into a cryogenically cooled target cell. The target was designed to operate with either longitudinal or transverse directions of polarization. Operating conditions included polarizations of up to 54% and target thicknesses of 1×10 15 nucleons/cm 2 . In this paper the HERMES polarized 3 He internal gas target is described in detail.
Published: 1998
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63. Measurements of Deuteron Photodisintegration up to 4.0 GeV

Author: D. Beatty, Pete Markowitz, L. Cardman, J. A. Dunne, D. van Westrum, J. Cha, David Mack, H. T. Fortune, K. Gustafsson, R. D. Carlini, C. Bochna, G. J. Kumbartzki, B. R. Owen, J.-O. Hansen, S. Danagoulian, Gabriel Niculescu, Dipangkar Dutta, B. Zeidman, S. Barrow, G. Collins, A. Ahmidouch, Thomas O'Neill, J. W. Price, John Arrington, G. Savage, I. Niculescu, C. Yan, R. J. Holt, H. Mkrtchyan, P. M. Rutt, P. Stoler, Haiyan Gao, D. H. Potterveld, H. E. Jackson, B. W. Filippone, O. K. Baker, Z. E. Meziani, H. Breuer, M. Khandaker, J. Napolitano, B. Terburg, C. S. Armstrong, M. A. Miller, D. Koltenuk, F. Duncan, R. Suleiman, E. J. Brash, K. McFarlane, Rolf Ent, N. Simicevic, D. Abbott, Paul Gueye, R. Madey, W. F. Vulcan, D. F. Geesaman, V. Frolov, T. A. Forest, S. F. Pate, J. E. Belz, M. Harvey, P. E. Bosted, Avraham Klein, T. Eden, J. H. Mitchell, W. J. Cummings, G. Rakness, A. F. Lung, C. Salgado, N. S. Chant, W. Hinton, M. Witkowski, Ronald Gilman, S. Beedoe, R. E. Segel, R. Mohring, S. A. Wood, C. E. Keppel, S. E. Williamson, Alan M. Nathan, E. R. Kinney, Douglas H Beck, R. D. McKeown, J. Reinhold, L. G. Tang, R. V. Cadman, Ketevi Assamagan, Ronald Ransome, D. G. Meekins, E. J. Beise, and C. Cothran
Subjects: Physics, Quantum chromodynamics, Nuclear reaction, Particle physics, Proton, Hadron, FOS: Physical sciences, General Physics and Astronomy, Particle accelerator, Photon energy, law.invention, Nuclear physics, law, Photodisintegration, Physics::Accelerator Physics, Nuclear Experiment (nucl-ex), Nuclear Experiment, Nucleon
Abstract: The first measurements of the differential cross section for the d(gamma,p)n reaction up to 4.0 GeV were performed at Continuous Electron Beam Accelerator Facility (CEBAF) at Jefferson Lab. We report the cross sections at the proton center-of-mass angles of 36, 52, 69 and 89 degrees. These results are in reasonable agreement with previous measurements at lower energy. The 89 and 69 degree data show constituent-counting-rule behavior up to 4.0 GeV photon energy. The 36 and 52 degree data disagree with the counting rule behavior. The quantum chromodynamics (QCD) model of nuclear reactions involving reduced amplitudes disagrees with the present data., Comment: 5 pages (REVTeX), 1 figure (postscript)
Published: 1998
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64. Electroweak processes and the SAMPLE experiment

Author: R. D. McKeown
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Scattering, Nuclear Theory, Electroweak interaction, Magnetic form factor, Parity (physics), Nuclear Experiment, Nucleon, Linear particle accelerator
Abstract: The neutral weak form factors of the nucleon provide crucial new information on the internal structure of the nucleon, such as a determination of the strange quark-antiquark contributions. The measurement of parity violation in elastic electron-nucleon scattering can be used to study these form factors. We have recently obtained the first results on the neutral weak magnetic form factor using this method in the SAMPLE experiment at the Bates Linear Accelerator Center. The status of this experiment and future experiments at other laboratories is discussed.
Published: 1998
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65. Temperature dependence of 3He polarization in aluminum storage cells

Author: D. DeSchepper, Ross Milner, S. F. Pate, R. D. McKeown, R. Carr, A. Dvoredsky, Y. Li, Wolfgang Korsch, Laird Kramer, Michael Pitt, and T. Shin
Subjects: Physics, Nuclear and High Energy Physics, media_common.quotation_subject, chemistry.chemical_element, Polarization (waves), Asymmetry, Exponential function, chemistry, Deuterium, Aluminium, Metastability, Atomic physics, Instrumentation, media_common, Concentration polarization
Abstract: The temperature dependence of the polarization of 3 He atoms in an internal target cell has been studied. Metastable optically pumped polarized 3 He atoms with typical polarization values of 40% were injected into a thin-walled aluminum cell of 40 cm length and a 29.0 × 9.8 mm 2 elliptical cross-section. The cell temperature was varied between 5 and 85 K. The polarization inside the target cell was measured via an asymmetry in the 3 He → (d,p) 4 He reaction at a deuteron energy of 4 MeV. An exponential decrease of the polarization was found for temperatures less than 15 K. For a temperature of ∼6 K a polarization consistent with zero was measured.
Published: 1997
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66. Assembly and Installation of the Daya Bay Antineutrino Detectors

Author: Changjian Lin, Nan Li, B. R. Littlejohn, W. Wang, Lei Yang, J. J. Cherwinka, X. C. Chen, C. A. Lewis, D. M. Webber, Juan Pedro Ochoa-Ricoux, Xiaoyuan Chen, A. Pagac, T. Wise, W. Zhong, P. Hinrichs, D. Wenman, L. Greenler, R. H.M. Tsang, E. Draeger, H. Themann, Kin Keung Kwan, J. Goett, H. L. Zhuang, W. Q. Gu, H. R. Band, M. Krämer, Kam Biu Luk, Y. Nakajima, X. L. Luo, Yuekun Heng, H. L. H. Wong, Li Kang, M. Wingert, Guisen Li, Q. Xiao, W. S. He, Y. Jin, R. L. Gill, S. F. Li, M. C. McFarlane, R. Carr, Zhijian Zhang, K. Shih, Z. M. Wang, J. Wilhelmi, M. Hoff, M. W. Kwok, K. M. Heeger, Ming Chung Chu, K. V. Tsang, Yi Wei, R. L. Brown, Liangjian Wen, Herbert M. Steiner, Xin Qian, Xiao-yan Li, Steve Virostek, B. Seilhan, Lu Wang, W. R. Edwards, D. A. Dwyer, R. D. McKeown, T. H. Ho, X. Tang, Jinmei Liu, X. Y. Ma, S H Kettell, Y. B. Hsiung, and F. F. Wu
Subjects: Physics - Instrumentation and Detectors, business.industry, Physics::Instrumentation and Detectors, Daya bay, Nuclear engineering, Detector, FOS: Physical sciences, Flux, Instrumentation and Detectors (physics.ins-det), Nuclear power, Physics::Geophysics, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Neutrino detector, Environmental science, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Neutrino, business, Nuclear Experiment, Instrumentation, Mathematical Physics
Abstract: The Daya Bay reactor antineutrino experiment is designed to make a precision measurement of the neutrino mixing angle theta13, and recently made the definitive discovery of its nonzero value. It utilizes a set of eight, functionally identical antineutrino detectors to measure the reactor flux and spectrum at baselines of 300 - 2000m from the Daya Bay and Ling Ao Nuclear Power Plants. The Daya Bay antineutrino detectors were built in an above-ground facility and deployed side-by-side at three underground experimental sites near and far from the nuclear reactors. This configuration allows the experiment to make a precision measurement of reactor antineutrino disappearance over km-long baselines and reduces relative systematic uncertainties between detectors and nuclear reactors. This paper describes the assembly and installation of the Daya Bay antineutrino detectors., 31 pages, 19 figures
Published: 2013
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67. Study of Nuclei and Elementary Particles At Low and Intermediate Energies

Author: Robert D McKeown
Subjects: Nuclear physics, Physics, Liquid Scintillator Neutrino Detector, Neutrino detector, Physics::Instrumentation and Detectors, High Energy Physics::Experiment, Elementary particle, Daya Bay Reactor Neutrino Experiment, Solar neutrino problem, Neutrino, Neutrino oscillation, Radioactive decay, Physics::Geophysics
Abstract: The primary activity associated with this DOE grant was the construction, commissioning, operation, and analysis of results of the KamLAND experiment. KamLAND is a large (1kT) liquid scintillator neutrino detector located deep underground in the Kamioka mine in Japan. This effort was a spectacular scientific success, with a major discovery of neutrino oscillations in the âsolarâ sector and the pioneering measurement of geoneutrinos due to radioactive decay within the earth. During the final year of the grant period, effort was devoted to developing the new Daya Bay reactor neutrino experiment in China.
Published: 2013
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68. Mass hierarchy resolution in reactor anti-neutrino experiments: Parameter degeneracies and detector energy response

Author: Xin Qian, D. A. Dwyer, Wei Wang, Petr Vogel, Chao Zhang, and R. D. McKeown
Subjects: Physics, Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Detector, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Solar neutrino problem, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Experimental uncertainty analysis, Neutrino detector, Calibration, Measurements of neutrino speed, Neutrino, Nuclear Experiment (nucl-ex), Neutrino oscillation, Nuclear Experiment
Abstract: Determination of the neutrino mass hierarchy using a reactor neutrino experiment at $\sim$60 km is analyzed. Such a measurement is challenging due to the finite detector resolution, the absolute energy scale calibration, as well as the degeneracies caused by current experimental uncertainty of $|\Delta m^2_{32}|$. The standard $\chi^2$ method is compared with a proposed Fourier transformation method. In addition, we show that for such a measurement to succeed, one must understand the non-linearity of the detector energy scale at the level of a few tenths of percent., Comment: 7 pages, 6 figures, accepted by PRD
Published: 2013

69. Inclusive electron scattering from nuclei atx≃1

Author: J. Arrington, H. J. Bulten, Haiyan Gao, H. E. Jackson, P. L. Anthony, D. H. Potterveld, B. Mueller, L. H. Tao, Kisoo Lee, B. Zeidman, P. E. Bosted, R. Gearhart, S. E. Kuhn, C. E. Jones, J. O. Hansen, K. P. Coulter, Ross Milner, J. L. White, E. R. Kinney, J. E. Belz, M. Spengos, B. W. Filippone, D. F. Geesaman, G. G. Petratos, R. G. Arnold, Z. M. Szalata, Michael Chapman, S. E. Rock, F. S. Dietrich, R. Ent, van den J.F.J. Brand, R. D. McKeown, D. Winter, E. J. Beise, D. J. Margaziotis, C. E. Keppel, R. J. Holt, Naomi C R Makins, Thomas O'Neill, A. Lung, M. Epstein, V. Papavassiliou, Jenny Nelson, Wolfgang Lorenzon, van K. Bibber, and J. Napolitano
Subjects: Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Scattering, Momentum transfer, Duality (optimization), Scattering length, Electron, 01 natural sciences, Nuclear physics, 0103 physical sciences, Atomic physics, 010306 general physics, Nucleon, Electron scattering, Scaling
Abstract: The inclusive A(e,e′) cross section for x≃1 was measured on ^2H, C, Fe, and Au for momentum transfers Q^2 from 1 to 6.8 (GeV/c)^2. The scaling behavior of the data was examined in the region of transition from y scaling to x scaling. Throughout this transitional region, the data exhibit ξ scaling, reminiscent of the Bloom-Gilman duality seen in free nucleon scattering.
Published: 1996
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70. Evidence For Virtual Compton-Scattering From The Proton

Author: B. W. Filippone, Jenny Nelson, Kisoo Lee, Haiyan Gao, D. H. Potterveld, D. F. Geesaman, E. R. Kinney, H. E. Jackson, B. Zeidman, S. E. Rock, R. D. McKeown, K. van Bibber, B. Mueller, Michael Chapman, M. B. Epstein, K. P. Coulter, R. A. Gearhart, Jim Napolitano, Wolfgang Lorenzon, D. J. Margaziotis, J. Arrington, E. J. Beise, H. J. Bulten, P.L. Anthony, J.-O. Hansen, F. S. Dietrich, S. E. Kuhn, J. F. J. van den Brand, P. E. Bosted, G. G. Petratos, J. E. Belz, Thomas O'Neill, L. H. Tao, M. Spengos, Rolf Ent, V. Papavassiliou, Z. M. Szalata, A. Lung, D. A. Wasson, R. G. Arnold, C. E. Jones, C. E. Keppel, Ross Milner, James L. White, R. J. Holt, and Naomi C R Makins
Subjects: Physics, Photon, Proton, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Compton scattering, Electron, Compton wavelength, MAGNETIC FORM-FACTORS, Inelastic scattering, Q(2)=1.75, Linear particle accelerator, Nuclear physics, (GEV/C)(2), Physics::Accelerator Physics, Nucleon, Nuclear Experiment
Abstract: In virtual Compton scattering an electron is scattered off a nucleon such that the nucleon emits a photon. We show that these events can be selected experimentally, and present the first evidence for virtual Compton scattering from the proton in data obtained at the Stanford Linear Accelerator Center. The angular and energy dependence of the data is well described by a calculation that includes the coherent sum of electron and proton radiation.
Published: 1995
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71. Irish Thoracic Society

Author: T. Feeney, O. O’Muire, J. J. Gilmartin, P. Manning, H. Sinclair, L. Clancy, F. O’Connell, D. R. Springall, J. M. Polak, V. E. Thomas, R. W. Fuller, N. B. Pride, R. A. Lyons, C. Leonard, J. Faul, V. J. Tormey, L. W. Poulter, C. M. Burke, S. Pathmakanthan, M. C. Barry, J. H. Wang, C. J. Kelly, P. E. Burke, S. J. Sheehan, H. P. Redmond, D. Bouchier-Hayes, H. Abdih, R. W. G. Watson, P. Burke, J. J. Egan, L. Barber, J. Lomax, A. Fox, J. Craske, N. Yonan, A. N. Rahman, A. K. Deiraniya, K. B. Carroll, A. Turner, A. A. Woodcock, K. McNeill, B. Bookless, K. Gould, P. Corris, T. Higgenbottam, A. Webb, A. Woodcock, K. McManus, D. Miller, M. Allen, D. Ilstrup, C. Deschamps, V. Trastek, P. Pairolero, T. P. Cotter, C. Vaughan, W. P. Kealy, P. F. Duggan, A. Curtain, C. P. Bredin, A. Waite, C. P. Maguire, J. Ryan, D. O’Neill, D. Coakley, J. B. Walsh, I. Kilgallen, S. O’Neill, M. Ryan, C. M. O’Connor, T. McDonnell, R. C. Lowry, J. B. Buick, T. R. A. Magee, D. O’Riordan, J. Hayes, C. O’Connor, M. X. FitzGerald, C. Cosgrave, C. Costello, P. C. Deegan, W. T. McNicholas, A. M. Nugent, J. Lyons, I. Gleadhill, J. MacMahon, E. C. Stevenson, L. G. Heaney, M. D. Shields, I. S. Cadden, R. Taylor, M. Ennis, S. A. Kharitonov, J. O’Connor, W. A. Owens, H. O’Kane, J. Cleland, D. J. Gladstone, M. Sarsam, A. N. J. Graham, V. Anikin, J. A. McGuigan, R. C. Curry, G. Varghese, P. Keelan, R. Rutherford, D. O’Keeffe, P. McCarthy, H. Moore, E. Balbernie, R. Coakley, M. Keane, R. Costello, P. Byrne, D. McKeogh, P. McLoughlin, G. Finlay, D. Concannon, D. McKeown, P. Kelly, W. A. Tanner, D. J. Bouchier-Hayes, M. Arumugasamy, K. Yacoub, G. O’Leary, K. Stokes, J. Geraghty, H. Osborne, R. O’Dwyer, R. Gilliland, S. M. Saleem, T. Aherne, C. K. Power, C. H. Burke, A. Byrne, J. F. A. Murphy, R. Sharkey, E. Mulloy, K. Sharkey, M. Long, M. A. Birchall, A. Moorat, J. Henderson, L. Jacques, P. Cahill, C. Condron, D. Royston, J. Murphy, and S. O. Neill
Subjects: General Medicine
Published: 1995
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72. Transverse-Longitudinal Asymmetry in the QuasielasticHe→3(e→, e′)Reaction

Author: Michael Pitt, Wolfgang Lorenzon, D. R. Tieger, B. Bray, R. Carr, E. J. Beise, J. O. Hansen, B. B. Wojtsekhowski, B. W. Filippone, Haiyan Gao, C. E. Jones, Kisoo Lee, P. U. Sauer, L. H. Kramer, E. Candell, W. Korsch, C. Tripp, J. Napolitano, D. DeSchepper, T.W. Donnelly, M. Farkhondeh, A. Lung, Ross Milner, Naomi C R Makins, G. W. Dodson, J. Arrington, R.-W. Schulze, M. A. Titko, B. Mueller, R. D. McKeown, K. Dow R. Ent, and T. P. Welch
Subjects: Physics, Nuclear reaction, Quasielastic scattering, media_common.quotation_subject, Nuclear Theory, Momentum transfer, Plane wave, General Physics and Astronomy, Asymmetry, Nuclear physics, Transverse plane, High Energy Physics::Experiment, Nuclear Experiment, Nucleon, Wave function, media_common
Abstract: The transverse-longitudinal asymmetry ATL′ in 3He→(e→, e′) quasielastic scattering at momentum transfer Q2=0.14 (GeV/c)^2 has been measured to be 1.52 ± 0.55(stat) ± 0.15(syst)%. The plane wave impulse approximation (PWIA) prediction for this measurement ranges from 2.1% to 2.9%, where the variation is due to uncertainty in the initial state wave function, nucleon form factors, and off-shell prescription. The data may suggest a suppression with respect to the PWIA, which has also been observed for the unpolarized longitudinal response function.
Published: 1995
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73. National scientific medical meeting 1995 abstracts

Author: S. Norris, C. Collins, J. Hegarty, C. O’Farrelly, J. Carton, L. Madrigal, D. P. O’Donoghue, H. Holloway, J. F. Fielding, W. Mullins, S. W. Hone, M. Donnelly, F. Powell, A. W. Blayney, E. A. Cahill, S. F. Daly, M. J. Turner, P. A. Sullivan, M. McLoughlin, M. M. Skelly, H. E. Mulcahy, T. Connell, C. Duggan, M. J. Duffy, A. Troy, K. Sheahan, A. Whelan, C. M. Herra, C. T. Keane, H. Johnson, B. Lee, E. Doherty, T. McDonnell, D. Mulherin, O. FitzGerald, B. Bresnihan, H. M. Hassett, A. Boyce, V. Greig, C. O’Herlihy, P. P. A. Smyth, E. F. Roche, I. McCormack, E. Tempany, M. J. Cullen, D. F. Smith, Y. McBrinn, B. Murray, R. Freaney, D. Keating, M. J. McKenna, J. A. O’Hare, H. Alam, Q. Raza, M. Geoghegan, S. Killalea, M. Hall, J. Feely, L. Kyne, B. O’Hara, M. Cullen, I. M. Rea, J. P. Donnelly, R. W. Stout, P. Lacey, M. J. Donnelly, J. McGrath, T. P. Hennessy, C. V. I. Timon, D. Hyde, H. X. Xia, M. Buckley, C. O’Morain, S. Keating, H. Xia, J. P. McGrath, R. C. Stuart, P. Lawlor, P. J. Byrne, T. N. Walsh, T. P. J. Hennessy, M. Duffy, M. Tubridy, J. Redmond, K. Monahan, R. P. Murphy, D. R. Headon, T. O’Gorman, F. M. O’Reilly, C. Darby, G. M. Murphy, A. Murphy, M. Codd, P. Dervan, D. Lawlor, S. O. Loughlin, N. Flanagan, R. Watson, L. Barnes, C. Kilgallen, E. Sweeney, A. Mynes, D. Mooney, I. Donoghue, O. Browne, J. A. Kirrane, D. McKenna, M. Young, E. O’Toole, S. O’Briain, U. Srinivasan, C. Feighery, N. Leonard, E. Jones, M. A. Moloney, D. G. Weir, M. Lawler, A. O’Neill, H. Gowing, D. Pamphilon, S. R. McCann, G. O’Toole, A. Orren, C. M. Seifer, D. C. Crowley, G. J. Sheehan, T. Deignan, J. Kelly, V. J. Tormey, J. Faul, C. Leonard, C. M. Burke, L. W. Poulter, S. Lynch, G. McEntee, O. Traynor, E. Barry, P. Costello, A. Keavney, R. Willoughby, C. O’Donnell, M. Cahill, A. Earley, P. Eustace, R. Osborne, C. Saidlear, B. Holmes, A. Early, A. P. Moran, A. Neisser, R. J. Polt, H. Bernheimer, M. Kainz, B. Schwerer, L. Gallagher, R. Firth, N. Kennedy, E. McGilloway, N. Tubridy, K. Shields, W. K. Cullen, M. J. Rowan, A. R. Moore, M. Rowan, D. Coakley, B. Lawlor, G. Swanwick, R. Al-Naeemi, R. Murphy, N. M. Codd, M. Goggins, N. P. Kennedy, B. L. Mallon, H. Mulcahy, M. Skelly, D. O. Donoghue, D. McCarthy, A. Saunders, D. J. Veale, J. J. F. Belch, D. Breathnach, E. Murphy, G. Kernohan, K. Gibson, A. G. Wilson, G. W. Duff, N. de Vries, L. B. A. van de Putte, J. Donoghue, F. O’Kelly, Z. Johnson, T. Maher, A. Moran, C. Keane, D. O’Neill, N. Horgan, J. M. Barragry, D. M. Campbell, M. Behan, P. R. O’Connell, V. S. Donnelly, D. Crowley, M. Geary, P. Boylan, M. Fanagan, K. Hickey, T. Teoh, M. Doyle, R. Harrison, D. Lyons, Y. Shenouda, M. Coughlan, P. McKenna, P. Lenehan, M. Foley, P. Kelehan, P. Ravichandran, M. Kelly, A. Conroy, C. Fitzpatrick, D. Egan, C. L. Regan, B. V. McAdam, P. McParland, G. A. FitzGerald, D. J. Fitzgerald, S. C. Sharma, K. Foran, C. Barry-Kinsella, R. F. Harrison, F. J. Gillespie, P. O’Mahony, M. Boyle, M. J. White, F. Donohoe, Y. Birrane, M. Naughton, R. B. Fitzsimons, M. Piracha, S. McConkey, E. Griffin, E. Hayes, T. Clarke, N. Parfrey, K. Butler, A. J. Malone, P. J. Kearney, P. F. Duggan, A. Lane, R. Keville, M. Turner, S. Barry, D. Sloan, S. Gallagher, M. Darby, P. Galligan, J. Stack, N. Walsh, M. O’Sullivan, M. Fitzgerald, D. Meagher, S. Browne, C. Larkin, P. Casey, E. O’Callaghan, S. Rooney, E. Walsh, M. Morris, T. Burke, M. Roe, C. Maher, M. Wrigley, M. Gill, M. Burgess, E. Corcoran, D. Walsh, B. Gilmer, C. B. Hayes, L. Thornton, J. Fogarty, R. Lyons, M. O’Connor, V. Delaney, K. Buckley, D. Lillis, V. Delany, C. Hayes, P. Dack, D. Igoe, H. J. O’Neill, P. Kelly, D. McKeown, L. Clancy, G. Varghese, S. Hennessy, J. J. Gilmartin, K. Birthistle, D. Carrington, H. Maguire, P. Atkinson, C. Foley-Nolan, M. Lynch, B. Cryan, D. Whyte, C. Conlon, V. Kucinskas, U. Usinskiene, I. Sakalyte, E. Dawson, K. Molloy, N. Goulden, J. Doyle, E. Lawlor, M. G. Harrington, N. El-Nageh, M. -L. Nolan, J. O’Riordan, G. Judge, G. Crotty, T. Finch, M. Borton, T. Barnes, O. Gilligan, G. Lee, R. Limmer, M. Madden, C. Bergin, A. O’Leary, F. Mulcahy, F. Wallis, M. Glennon, M. Cormican, U. NiRiain, M. Heiginbothom, F. Gannon, T. Smith, C. O’Sullivan, R. Hone, D. A. Caugant, C. A. P. Fijen, E. J. Van Schalkwyk, G. J. Coetzee, U. Ni Riain, M. G. Cormican, L. Park, J. Flynn, V. Regazzoli, M. Hayes, G. Nicholson, P. Higgins, N. Flynn, G. Corbett-Feeney, D. J. Conway, N. J. O’Higgins, S. Rajendiran, J. Byrne, E. Kilfeather, P. Dingle, M. Hunter, S. K. Al-Ghazal, P. Stanley, J. Palmer, A. Hong, P. Saxby, D. Sheehan, I. Regan, J. O’Mullane, M. Ni Chaoimh, M. Leahy, J. J. Heffron, M. Lehane, C. Keohane, N. O’Leary, M. Sheehan, E. Renny-Walsh, M. J. Whelton, C. T. Doyle, J. Webster, N. Benjamin, S. FitzGerald, J. S. Chadha, M. G. FitzGerald, G. R. FitzGerald, L. Hemeryck, P. McGettigan, J. Golden, N. Arthur, S. Y. Wen, P. Deegan, T. Cooke, G. I. Adebayo, P. Gaffney, M. Sinnot, D. O’Riordan, T. Hayes, C. M. O’Connor, M. X. FitzGerald, C. Costello, G. Finlay, J. Hayes, C. O’Connor, K. McMahon, S. Hone, J. Robertson, R. Coakley, S. O’Neill, M. Walsh, J. McCarthy, D. Lannon, A. E. Wood, R. Sharkey, E. Mulloy, M. Long, I. Kilgallen, V. Tormey, S. Horne, T. Feeney, Ó. Ó Muiré, M. J. Griffin, D. Hughes, A. Knaggs, D. Magee, C. McCrory, B. March, D. Phelan, M. White, J. Fabry, D. Buggy, C. Cooney, E. Aziz, D. O’Keefe, A. J. McShane, J. Boylan, E. Tobin, C. Motherway, F. Colreavy, N. Denish, R. Dwyer, A. Bergin, K. O’Brien, R. MacSullivan, K. D. Carson, W. P. Blunnie, D. C. Moriarty, B. Kinirons, B. Lyons, N. Cregg, W. Casey, K. P. Moore, S. A. Colbert, C. Ecoffey, D. O’Gorman, J. Fitzgerald, P. Diamond, M. B. Codd, D. D. Sugrue, J. Kellett, M. Tighe, C. J. McKenna, J. Galvin, H. A. McCann, A. Scallon, A. Fraser, M. Norton, G. Tomkin, I. Graham, A. Byrne, M. Maher, N. Moran, D. Fitzgerald, D. O’Callaghan, D. Coyle, A. G. Nugent, C. McGurk, G. D. Johnston, A. Nugent, B. Silke, N. Murphy, L. Jennings, D. Pratico, C. Doyle, T. Hennessy, H. McCann, D. Sugrue, S. Donnelly, A. Hennessy, C. Hartigan, D. MacDonald, S. Blake, D. McDonald, D. Dominque, S. R. McMechan, G. MacKenzie, J. Allen, G. T. Wright, G. J. Dempsey, M. Crawley, J. Anderson, A. A. J. Adgey, M. T. Harbinson, N. P. S. Campbell, C. M. Wilson, P. K. Ellis, E. M. McIlrath, A. McShane, T. V. Keaveny, K. Rabenstein, F. Scheller, D. Pfeiffer, C. Urban, I. Moser, G. Jobst, A. Manz, S. Verpoorte, F. Dempsey, D. Diamond, M. Smyth, E. Dempsey, V. Hamilton, J. Twomey, R. Crowley, L. Fenelon, F. Walsh, J. McCann, P. McDonagh, E. McGovern, D. Luke, K. Crowley, D. Mannion, D. Murphy, K. Clarkson, E. Carton, I. Leonard, D. O’Toole, M. Staunton, M. Griffin, D. Owens, P. Collins, A. Johnson, G. H. Tomkin, N. A. Herity, J. D. Allen, R. O’Moore, G. M. Crotty, M. DeArce, K. Nikookam, P. Keenan, D. Cregan, N. O’Meara, S. Forman, D. A. Cusack, and B. Farrell
Subjects: medicine.medical_specialty, business.industry, Family medicine, medicine, MEDLINE, General Medicine, business
Published: 1995
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74. Recent results from the SAMPLE experiment

Author: R. D. McKeown
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Strange quark, Proton, Magnetic moment, High Energy Physics::Phenomenology, Nuclear Theory, Momentum transfer, Electroweak interaction, Hadron, Quark model, Nuclear physics, Moment (mathematics), Nuclear Experiment
Abstract: The SAMPLE experiment at MIT-Bates provides measurements of parity-violating electron scattering at backward angles and low momentum transfer. These measurements yield unique information on the contribution of strange quarks to the magnetic moment of the proton and also electroweak corrections such as the anapole moment. Recent results, some possible interpretations, and outstanding issues for the future are discussed.
Published: 2003
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75. Primary care anticoagulant management using near patient testing

Author: D McKeown, C O’Hanlon, A. Cosgrove, M Daly, Andrew W. Murphy, and E. L. Egan
Subjects: medicine.medical_specialty, Primary Health Care, medicine.drug_class, business.industry, Anticoagulant, Primary health care, Anticoagulants, General Medicine, Primary care, Anticoagulant therapy, Near patient testing, medicine, Humans, Blood Coagulation Tests, Intensive care medicine, Anticoagulation clinic, business, Oral anticoagulation, Monitoring, Physiologic, Blood coagulation test
Abstract: Indications for anticoagulant treatment are increasing and new approaches to anticoagulant services require a shift from hospital to primary care.To pragmatically test the validity and effectiveness of primary care anticoagulant management using near patient testing.Twelve CoaguCheck monitors were supplied to 16 rural practices that had previously provided supervision of anticoagulant therapy. Practices were required to record data for eligible patients from September 1998 to April 1999 and to forward one blood sample per week to the regional hospital laboratory for parallel testing.Nine practices returned data on 122 patients. Indications for anticoagulation Included atrial fibrillation (n = 56), valve replacement (n = 12) and deep venous thrombosis or pulmonary embolus (n=12). Regression of the mean of 185 paired readings against their difference confirmed the validity of the CoaguCheck monitor (r2 = 0.00 [95% CI -0.38 to 0.38]). There were 692 International Normalised Ratio (INR) tests performed representing an average of 5.7 tests per patient. The desired therapeutic range was provided for 609 (88%) of these tests; 294 (48.3%) were within the desired therapeutic range. Results differed significantly between practices.This study confirmed the validity of anticoagulant management using the CoaguCheck monitor in primary care.
Published: 2003
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76. Statistical evaluation of experimental determinations of neutrino mass hierarchy

Author: Xin Qian, Aixin Tan, J. J. Ling, Chao Zhang, R. D. McKeown, and Wei Wang
Subjects: Physics, Nuclear and High Energy Physics, Gaussian, Bayesian probability, FOS: Physical sciences, Experimental data, Confidence interval, High Energy Physics - Experiment, Binomial distribution, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology, symbols.namesake, Theoretical physics, High Energy Physics - Phenomenology (hep-ph), Bernoulli distribution, symbols, Applied mathematics, Sensitivity (control systems), Nuclear Experiment (nucl-ex), Nuclear Experiment, Statistical hypothesis testing
Abstract: Statistical methods of presenting experimental results in constraining the neutrino mass hierarchy (MH) are discussed. Two problems are considered and are related to each other: how to report the findings for observed experimental data, and how to evaluate the ability of a future experiment to determine the neutrino mass hierarchy, namely, sensitivity of the experiment. For the first problem where experimental data have already been observed, the classical statistical analysis involves constructing confidence intervals for the parameter {\Delta}m^2_{32}. These intervals are deduced from the parent distribution of the estimation of {\Delta}m^2_{32} based on experimental data. Due to existing experimental constraints on |{\Delta}m^2_{32}|, the estimation of {\Delta}m^2_{32} is better approximated by a Bernoulli distribution (a Binomial distribution with 1 trial) rather than a Gaussian distribution. Therefore, the Feldman-Cousins approach needs to be used instead of the Gaussian approximation in constructing confidence intervals. Furthermore, as a result of the definition of confidence intervals, even if it is correctly constructed, its confidence level does not directly reflect how much one hypothesis of the MH is supported by the data rather than the other hypothesis. We thus describe a Bayesian approach that quantifies the evidence provided by the observed experimental data through the (posterior) probability that either one hypothesis of MH is true. This Bayesian presentation of observed experimental results is then used to develop several metrics to assess the sensitivity of future experiments. Illustrations are made using a simple example with a confined parameter space, which approximates the MH determination problem with experimental constraints on the |{\Delta}m^2_{32}|., Comment: 15 pages, 3 figures, updates on text, accepted by PRD
Published: 2012
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77. Measurement of the Parity-Violating Asymmetry in Inclusive Electroproduction ofπ−near theΔ0Resonance

Author: V. Tadevosyan, M. Stutzman, M. K. Jones, R. Suleiman, J. Hansknecht, G. Guillard, Fatiha Benmokhtar, Darko Androić, S. Kox, W. D. Ramsay, Michael Pitt, W. T. H. van Oers, J. Roche, T. Horn, A. Micherdzinska, S. L. Bailey, E. Voutier, D. T. Spayde, H. Breuer, P. Bosted, Douglas H Beck, G. Flores, Christophe Furget, Michael Gericke, S. Wells, R. D. McKeown, Neven Simicevic, M. Muether, M. Poelker, E. J. Beise, Y. C. Chao, D. Gaskell, A. Coppens, M. Versteegen, J. Grames, B. P. Quinn, D. S. Armstrong, G. R. Smith, M. Mihovilovic, Junyu Liu, C. L. Capuano, L. Bimbot, S. E. Williamson, J. Birchall, S. K. Phillips, Wolfgang Korsch, Juliette Mammei, S. A. Wood, P. M. King, J. Arvieux, S. F. Pate, H. Mkrtchyan, C. Ellis, S. A. Page, P. G. Roos, P. Pillot, G. B. Franklin, W. F. Vulcan, T. Seva, J. Schaub, L. Lee, V. Papavassiliou, J. W. Martin, Jay Benesch, J. S. Real, C. A. Davis, and A. Lung
Subjects: Physics, Particle physics, Chiral perturbation theory, 010308 nuclear & particles physics, Scattering, media_common.quotation_subject, Hyperon, General Physics and Astronomy, Inelastic scattering, 01 natural sciences, Asymmetry, Nuclear physics, Pion, 0103 physical sciences, High Energy Physics::Experiment, Neutron, Nuclear Experiment, 010306 general physics, Electron scattering, media_common
Abstract: The parity-violating (PV) asymmetry of inclusive π- production in electron scattering from a liquid deuterium target was measured at backward angles. The measurement was conducted as a part of the G0 experiment, at a beam energy of 360 MeV. The physics process dominating pion production for these kinematics is quasifree photoproduction off the neutron via the Δ^0 resonance. In the context of heavy-baryon chiral perturbation theory, this asymmetry is related to a low-energy constant d_Δ^- that characterizes the parity-violating γNΔ coupling. Zhu et al. calculated d_Δ^- in a model benchmarked by the large asymmetries seen in hyperon weak radiative decays, and predicted potentially large asymmetries for this process, ranging from A_γ^-=-5.2 to +5.2 ppm. The measurement performed in this work leads to A_γ^-=-0.36±1.06±0.37±0.03 ppm (where sources of statistical, systematic and theoretical uncertainties are included), which would disfavor enchancements considered by Zhu et al. proportional to V_(ud)/V_(us). The measurement is part of a program of inelastic scattering measurements that were conducted by the G0 experiment, seeking to determine the N-Δ axial transition form factors using PV electron scattering.
Published: 2012
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78. Observation of electron-antineutrino disappearance at Daya Bay

Author: D. M. Webber, X. Huang, A. Pagac, Y. Wang, Pu Huang, W. Q. Jiang, F. H. Zhang, L. Lebanowski, Y. Y. Ding, M. Qi, S. R. Ely, M. Bishai, H. X. Huang, J. J. Cherwinka, Tian Xue, H. C. Wong, Xuejun Liu, Y. A. Gornushkin, Guisen Li, Y. K. Heng, A. G. Olshevski, Xiaoyuan Chen, Yaolong Zhang, Yi Wei, Meng Wang, X. C. Chen, K. K. Kwan, Jianbin Xu, C. E. Tull, Yi Chen, Q. He, Li Zhou, Honghan Gong, Z. Y. Deng, E. Draeger, H. Themann, Guanghua Gong, P. Stoler, M. V. Diwan, W. K. Ngai, S. D. Fang, W. Zhong, H. L. Zhuang, K. T. McDonald, E. T. Worcester, Qingming Ma, J. K. C. Leung, Min-Xin Guan, B. R. Littlejohn, Chi Lin, L. E. Piilonen, T. Wise, Y. X. Chen, R. H.M. Tsang, W. C. Lai, Zhongyuan Zhou, S. Jetter, Q. J. Li, S. H. Kettell, K. Shih, Jiaheng Zou, Wai Ting Chan, C. White, H. Z. Huang, W. P. Wang, Igor Nemchenok, Zhijian Zhang, A. B. Balantekin, L. Zheng, Michael Kramer, C. A. Lewis, Xiaoyan Ma, B. Viren, Yufeng Li, L. Kang, B. B. Shao, C. R. Newsom, Vit Vorobel, S. J. Patton, W. Q. Gu, Richard Rosero, Lei Yang, Z. Isvan, K. Y. Leung, L. Q. Ge, D. Wenman, Guo-Lin Xu, Wei Li, J. E. Morgan, K. Whisnant, Y. H. Chang, D. Mohapatra, Maxim Gonchar, Joonho Lee, X. L. Ji, W. S. He, J. Napolitano, F. P. An, Wing-Hon Lai, X. B. Li, D. R. Beavis, L. S. Wang, Rupert Leitner, Zeyuan Yu, B. Z. Hu, T. Luo, Y. Xu, Chun S. J. Pun, S. Blyth, J. Goett, C. H. Wang, R. A. Johnson, K. Zhang, Shaomin Chen, Jun Cao, H. S. Chen, Zhenyu Zhang, Zhiyong Zhang, Ming Chung Chu, Bei Cai, V. Ghazikhanian, Changgen Yang, Y. Nakajima, Jiawen Zhang, M. W. Kwok, P. Hinrichs, K. Lau, Q. W. Zhao, S. F. Li, B. Seilhan, M. C. McFarlane, Y. B. Hsiung, R. W. Hackenburg, V. Pec, S. J. Chen, C. Liu, J. Cummings, Sa Liu, Yue Meng, Ching-Yao Lai, R. D. McKeown, Tao Hu, F. F. Wu, S. Hans, Jianglai Liu, T. H. Ho, F. Z. Qi, Dmitry V. Naumov, C. Lu, Minfang Yeh, J. Z. Bai, N. Y. Wang, X. N. Li, J. M. Link, J. J. Ling, Kam-Biu Luk, R. L. Brown, S. Trentalange, K. V. Tsang, J. B. Jiao, J. L. Xu, C. Pearson, Z. Wang, Y. S. Yeh, Xin Qian, Huo Yan Chen, X. F. Du, H. L. H. Wong, Y. X. Zhang, J. Wong, Zai-Wei Fu, Q. Wu, B. L. Young, B. Roskovec, Y. C. Lin, Lawrence S. Pinsky, Steve Virostek, Y. H. Tam, Y. K. Hor, T. Kwok, X. T. Huang, Guey-Lin Lin, Liangjian Wen, S. H. Zhang, D. M. Xia, Guofu Cao, W. Beriguete, Zhi-zhong Xing, L. S. Littenberg, Yi-Fang Zhao, L. Y. Wang, Chao Zhang, Patrick Huber, Zhi Ning, H. Y. Ngai, R. L. Gill, Jennifer S. Li, R. Carr, Y. B. Nie, X. Tang, Zhenyu Wang, J. Y. Fu, Xiang Li, F. Li, C. Chasman, Haoqi Lu, Jingjing Liang, Jen-Chieh Peng, B. W. Mayes, Lixin Dong, W. Xu, M. H. Ye, Y. B. Liu, J. Wilhelmi, H. J. Jiang, L. Z. Wang, X. P. Ji, J. L. Sun, J. F. Chang, O. D. Tsai, X. L. Luo, Xuan Wang, Jinmei Liu, Jing Zhao, X. Y. Ma, L. H. Ma, D. E. Jaffe, L. H. Whitehead, Q. Xiao, Shengxin Lin, K. M. Heeger, W. R. Edwards, K. Yip, Juan Pedro Ochoa-Ricoux, M. K.P. Lee, D. Oh, Miao He, B. Li, Y. Torun, C. A. Whitten, L. Greenler, R. G. Wang, Y. H. Zhang, Ting-Chi Wang, Liang Zhan, A. Luk, D. A. Dwyer, H. R. Band, H. Liang, H. M. Steiner, Q. X. Zhang, Y. Q. Ma, S. K. Lin, N. Raper, Brent J. Liu, H. K. Tanaka, Xiaohu Guo, X. S. Chen, Hongjun Liu, Zhibing Li, K. Boddy, R. L. Hahn, Qingmin Zhang, S. T. Xiang, G. X. Sun, X. C. Ruan, and D. W. Liu
Subjects: NOνA, Physics, Particle physics, T2K experiment, General Physics and Astronomy, FOS: Physical sciences, Daya Bay Reactor Neutrino Experiment, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Inverse beta decay, Neutrino, Neutrino oscillation, Electron neutrino, Jiangmen Underground Neutrino Observatory
Abstract: The Daya Bay Reactor Neutrino Experiment has measured a non-zero value for the neutrino mixing angle $\theta_{13}$ with a significance of 5.2 standard deviations. Antineutrinos from six 2.9 GW$_{\rm th}$ reactors were detected in six antineutrino detectors deployed in two near (flux-weighted baseline 470 m and 576 m) and one far (1648 m) underground experimental halls. With a 43,000 ton-GW_{\rm th}-day livetime exposure in 55 days, 10416 (80376) electron antineutrino candidates were detected at the far hall (near halls). The ratio of the observed to expected number of antineutrinos at the far hall is $R=0.940\pm 0.011({\rm stat}) \pm 0.004({\rm syst})$. A rate-only analysis finds $\sin^22\theta_{13}=0.092\pm 0.016({\rm stat})\pm0.005({\rm syst})$ in a three-neutrino framework., Comment: 5 figures. Version to appear in Phys. Rev. Lett
Published: 2012

79. A side-by-side comparison of Daya Bay antineutrino detectors

Author: O. D. Tsai, H. F. Hao, Jinmei Liu, Jing Zhao, X. Y. Ma, A. B. Balantekin, Minfang Yeh, J. Z. Bai, L. Kang, J. Y. Fu, Jiawen Zhang, Q. An, B. Roskovec, Liangquan Ge, D. Wenman, Sa Liu, C. H. Wang, Guisen Li, H. S. Chen, J. F. Chang, Honghan Gong, Z. Y. Deng, Patrick Huber, Q. Xiao, Shengxin Lin, Zai-Wei Fu, W. K. Ngai, Qingming Ma, F. Li, Rupert Leitner, Bing-Lin Young, T. Kwok, Guey-Lin Lin, J. Wilhelmi, Jiaheng Zou, D. E. Jaffe, Y. K. Hor, Vit Vorobel, L. Lebanowski, Y. Y. Ding, Guanghua Gong, Y. B. Hsiung, F. F. Wu, P. Stoler, Chi Lin, W. Beriguete, D. M. Webber, X. L. Ji, J. K. C. Leung, Chao Zhang, Wei Li, Xurong Chen, Xiaoyuan Chen, M. V. Diwan, X. Q. Li, S. D. Fang, G. X. Sun, X. C. Ruan, Y. S. Yeh, K. K. Kwan, X. L. Luo, L. H. Whitehead, S. Blyth, Y. Zhou, Zhiyong Zhang, R. G. Wang, Y. H. Zhang, Liang Zhan, A. Luk, J. J. Cherwinka, X. Tang, K. M. Heeger, K. V. Tsang, S. H. Kettell, L. H. Ma, Xuan Wang, X. C. Chen, A. G. Olshevski, D. W. Liu, Xuejun Liu, Z. B. Li, Kirk T. McDonald, R. W. Hackenburg, W. R. Edwards, Y. A. Gornushkin, T. Wise, Juan Pedro Ochoa-Ricoux, D. A. Dwyer, Z. Wang, Zhiyuan Wang, Zhongyuan Zhou, X. P. Ji, Li Zhou, X. F. Du, H. R. Band, Wei Wang, S. H. Zhang, D. Mohapatra, Maxim Gonchar, Lawrence Pinsky, D. M. Xia, H. M. Steiner, J. L. Sun, H. Liang, Y. Q. Ma, Y. C. Lin, Xiaohu Guo, L. Y. Wang, Yi Chen, Q. He, C. Chasman, R. A. Johnson, Wing-Hon Lai, X. B. Li, Yi Wei, Brent J. Liu, Jen-Chieh Peng, H. Z. Huang, V. Pec, Changgen Yang, P. Hinrichs, S. Trentalange, Richard Rosero, S. J. Patton, S. Hans, W. Q. Gu, Miao He, C. Lu, J. L. Xu, J. B. Xi, W. L. Zhong, Y. H. Sun, L. Greenler, B. B. Shao, J. Wong, Michael Kramer, Y. Nakajima, Min-Xin Guan, B. R. Littlejohn, M. W. Kwok, Haoqi Lu, Yagmur Torun, Qingmin Zhang, R. D. McKeown, T. H. Ho, F. Z. Qi, J. B. Jiao, Y. H. Chang, W. C. Lai, M. K.P. Lee, W. S. He, Chun S. J. Pun, Shaomin Chen, Jun Cao, S. F. Li, M. C. McFarlane, Ching-Yao Lai, Dmitry V. Naumov, E. Draeger, H. L. Zhuang, Christopher G. White, Yufeng Li, Jun Li, J. M. Link, J. P. Cummings, C. A. Lewis, K. Whisnant, L. S. Littenberg, H. K. Tanaka, Zhi Ning, Tian Xue, Y. K. Heng, Zhenyu Zhang, K. Lau, Tao Hu, N. Y. Wang, B. Viren, Kwok Yin Leung, Y. Xu, Q. W. Zhao, R. Carr, Y. B. Nie, B. W. Mayes, X. Huang, L. E. Piilonen, S. Jetter, K. Shih, R. H.M. Tsang, J. J. Ling, Guo-Lin Xu, W. Q. Jiang, Xin Qian, B. Z. Hu, Xiao-yan Li, R. L. Hahn, X. T. Huang, Zhi-zhong Xing, M. Z. Wang, Ming Chung Chu, Q. J. Li, Yaolong Zhang, C. E. Tull, M. Qi, S. R. Ely, C. R. Newsom, M. Bishai, Yaolin Zhao, Jianbin Xu, L. S. Wang, Zeyuan Yu, H. L. H. Wong, Y. X. Zhang, A. Pagac, B. Seilhan, Y. Wang, Pu Huang, S. J. Chen, Q. Wu, F. H. Zhang, H. X. Huang, Jianglai Liu, H. Y. Ngai, R. L. Gill, Igor Nemchenok, Zhijian Zhang, L. Zheng, J. Napolitano, F. P. An, Yue Meng, Kam-Biu Luk, Haifeng Zhao, M. H. Ye, S. K. Lin, R. L. Brown, Liangjian Wen, Guofu Cao, Y. B. Liu, H. J. Jiang, and Lin Yang
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, Daya bay, Detector, FOS: Physical sciences, Daya Bay Reactor Neutrino Experiment, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Calibration, Neutrino, Nuclear Experiment (nucl-ex), 010306 general physics, Neutrino oscillation, Instrumentation, Nuclear Experiment
Abstract: The Daya Bay Reactor Neutrino Experiment is designed to determine precisely the neutrino mixing angle $\theta_{13}$ with a sensitivity better than 0.01 in the parameter sin$^22\theta_{13}$ at the 90% confidence level. To achieve this goal, the collaboration will build eight functionally identical antineutrino detectors. The first two detectors have been constructed, installed and commissioned in Experimental Hall 1, with steady data-taking beginning September 23, 2011. A comparison of the data collected over the subsequent three months indicates that the detectors are functionally identical, and that detector-related systematic uncertainties exceed requirements., Comment: 24 pages, 36 figures
Published: 2012

80. Physics Opportunities with the 12 GeV Upgrade at Jefferson Lab

Author: Jozef Dudek, Rolf Ent, Rouven Essig, K. S. Kumar, Curtis Meyer, R. D. McKeown, Zein Eddine Meziani, Gerald A. Miller, Michael Pennington, David Richards, Larry Weinstein, Glenn Young, and Susan Brown
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Electroweak interaction, FOS: Physical sciences, 20399 Classical Physics not elsewhere classified, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Upgrade, Electron beam accelerator, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract: This white paper summarizes the scientific opportunities for utilization of the upgraded 12 GeV Continuous Electron Beam Accelerator Facility (CEBAF) and associated experimental equipment at Jefferson Lab. It is based on the 52 proposals recommended for approval by the Jefferson Lab Program Advisory Committee.The upgraded facility will enable a new experimental program with substantial discovery potential to address important topics in nuclear, hadronic, and electroweak physics., Comment: 64 pages
Published: 2012
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81. Search for extraterrestrial antineutrino sources with the KamLAND detector

Author: D. A. Dwyer, M. Sakai, H. M. Steiner, Hitoshi Murayama, G. A. Horton-Smith, M. P. Decowski, N. Nagai, Y. Kibe, Hidetomo Yoshida, R. W. Kadel, Yuri Efremenko, J. A. Detwiler, J. G. Learned, J. Maricic, B. D. Xu, T. I. Banks, A. Piepke, A. Gando, K. M. Heeger, Yasuhiro Kishimoto, H. Ikeda, B. E. Berger, Sanshiro Enomoto, Hideki Watanabe, Yuri Kamyshkov, K. Nakajima, M. Batygov, F. Suekane, S. Matsuno, M. Koga, Y. Gando, Ke Han, Stuart J. Freedman, J. Shirai, T. O'Donnell, T. Miletic, I. Shimizu, O. Perevozchikov, C. E. Lane, T. Morikawa, N. Takahashi, Giorgio Gratta, G. Keefer, A. Suzuki, K. Narita, Y. Minekawa, K. Tamae, Y. Takemoto, R. D. McKeown, Kunio Inoue, H. Takahashi, Yasuhiro Shimizu, B. K. Fujikawa, H. Yabumoto, Chao Zhang, A. Kozlov, D. M. Markoff, T. Mitsui, C. Grant, T. Bloxham, S. Yoshida, Koichi Ichimura, Hugon J Karwowski, K. Nakamura, Werner Tornow, K. E. Downum, and Astroparticle Physics (IHEF, IoP, FNWI)
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Particle physics, Annihilation, Neutral current, Solar neutrino, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, High Energy Physics::Phenomenology, Flux, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, High Energy Physics - Experiment, Supernova, High Energy Physics - Experiment (hep-ex), Space and Planetary Science, High Energy Physics::Experiment, Neutrino, Nuclear Experiment (nucl-ex), Astrophysics - High Energy Astrophysical Phenomena, Light dark matter, Nuclear Experiment
Abstract: We present the results of a search for extraterrestrial electron antineutrinos ($\bar{\nu}_{e}$'s) in the energy range $8.3 MeV < E_{\bar{\nu}_{e}} < 31.8 MeV$ using the KamLAND detector. In an exposure of 4.53 kton-year, we identify 25 candidate events. All of the candidate events can be attributed to background, most importantly neutral current atmospheric neutrino interactions, setting an upper limit on the probability of $^{8}$B solar $\nu_{e}$'s converting into $\bar{\nu}_{e}$'s at $5.3 \times 10^{-5}$ (90% C.L.), if we assume an undistorted $\bar{\nu}_{e}$ shape. This limit corresponds to a solar $\bar{\nu}_{e}$ flux of $93 cm^{-2} s^{-1}$ or an event rate of $1.6 events (kton-year)^{-1}$ above the energy threshold $(E_{\bar{\nu}_{e}} > 8.3 MeV)$. The present data also allows us to set more stringent limits on the diffuse supernova neutrino flux and on the annihilation rates for light dark matter particles., Comment: 22 pages, 6 figures
Published: 2012

82. Electroweak physics at Jefferson Lab

Author: R. D. McKeown
Subjects: Physics, Particle physics, High intensity, Physics beyond the Standard Model, Electroweak interaction, FOS: Physical sciences, Electron, High Energy Physics - Experiment, Standard Model, Nuclear physics, High Energy Physics - Experiment (hep-ex), Upgrade, Electron beam accelerator, Cathode ray, Physics::Accelerator Physics, Nuclear Experiment
Abstract: The Continuous Electron Beam Accelerator Facility (CEBAF) at the Thomas Jefferson National Accelerator Facility provides CW electron beams with high intensity, remarkable stability, and a high degree of polarization. These capabilities offer new and unique opportunities to search for novel particles and forces that would require extension of the standard model. CEBAF is presently undergoing an upgrade that includes doubling the energy of the electron beam to 12 GeV and enhancements to the experimental equipment. This upgraded facility will provide increased capability to address new physics beyond the standard model., 8 pages, 3 figures, Paper compiled for IX Latin American Symposium On Nuclear Physics And Applications
Published: 2012
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83. Measurement of the Parity-Violating Asymmetry in Inclusive Electroproduction of π- near the Δ0 Resonance

Author: D, Androić, D S, Armstrong, J, Arvieux, S L, Bailey, D H, Beck, E J, Beise, J, Benesch, F, Benmokhtar, L, Bimbot, J, Birchall, P, Bosted, H, Breuer, C L, Capuano, Y-C, Chao, A, Coppens, C A, Davis, C, Ellis, G, Flores, G, Franklin, C, Furget, D, Gaskell, M T W, Gericke, J, Grames, G, Guillard, J, Hansknecht, T, Horn, M K, Jones, P M, King, W, Korsch, S, Kox, L, Lee, J, Liu, A, Lung, J, Mammei, J W, Martin, R D, McKeown, A, Micherdzinska, M, Mihovilovic, H, Mkrtchyan, M, Muether, S A, Page, V, Papavassiliou, S F, Pate, S K, Phillips, P, Pillot, M L, Pitt, M, Poelker, B, Quinn, W D, Ramsay, J-S, Real, J, Roche, P, Roos, J, Schaub, T, Seva, N, Simicevic, G R, Smith, D T, Spayde, M, Stutzman, R, Suleiman, V, Tadevosyan, W T H, van Oers, M, Versteegen, E, Voutier, W, Vulcan, S P, Wells, S E, Williamson, and S A, Wood
Subjects: PRIRODNE ZNANOSTI. Fizika, deuterium target, electron scattering, parity-violating asymmetry, High Energy Physics::Experiment, Nuclear Experiment, NATURAL SCIENCES. Physics
Abstract: The parity-violating (PV) asymmetry of inclusive π- production in electron scattering from a liquid deuterium target was measured at backward angles. The measurement was conducted as a part of the G0 experiment, at a beam energy of 360 MeV. The physics process dominating pion production for these kinematics is quasifree photoproduction off the neutron via the Δ0 resonance. In the context of heavy-baryon chiral perturbation theory, this asymmetry is related to a low-energy constant d(Δ)- that characterizes the parity-violating γNΔ coupling. Zhu et al. calculated d(Δ)- in a model benchmarked by the large asymmetries seen in hyperon weak radiative decays, and predicted potentially large asymmetries for this process, ranging from A(γ)-=-5.2 to +5.2 ppm. The measurement performed in this work leads to A(γ)-=-0.36±1.06±0.37±0.03 ppm (where sources of statistical, systematic and theoretical uncertainties are included), which would disfavor enchancements considered by Zhu et al. proportional to V(ud)/V(us). The measurement is part of a program of inelastic scattering measurements that were conducted by the G0 experiment, seeking to determine the N-Δ axial transition form factors using PV electron scattering.
Published: 2012
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84. Measurement of the neutron magnetic form factor from inclusive quasielastic scattering of polarized electrons from polarizedHe3

Author: B. B. Wojtsekhowski, J. O. Hansen, Richard G. Milner, Naomi C R Makins, M. Farkhondeh, E. J. Beise, B. Bray, T. P. Welch, C. Tripp, D. DeSchepper, E. Candell, D. R. Tieger, C. E. Jones, W. Lorenzon, R. Carr, B. W. Filippone, Michael Pitt, R. Ent, W. Korsch, B. Mueller, R. D. McKeown, A. Lung, K. A. Dow, Jim Napolitano, G. W. Dodson, L. H. Kramer, Haiyan Gao, J. Arrington, and K. Lee
Subjects: Nuclear physics, Nuclear reaction, Physics, Nuclear and High Energy Physics, Dipole, Quasielastic scattering, Scattering, Computer Science::Information Retrieval, Magnetic form factor, Neutron, Atomic physics, Nucleon, Electron scattering
Abstract: We report a measurement of the asymmetry in spin-dependent quasielastic scattering of longitudinally polarized electrons from a polarized [sup 3]He target. The neutron magnetic form factor [ital G][sup [ital n]][sub [ital M]] has been extracted from the measured asymmetry based on recent PWIA calculations using spin-dependent spectral functions. Our determination of [ital G][sup [ital n]][sub [ital M]] at [ital Q][sup 2]=0.19 (GeV/[ital c])[sup 2] agrees with the dipole parametrization. This experiment represents the first measurement of the neutron magnetic form factor using spin-dependent electron scattering.
Published: 1994
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85. Measurements of the proton elastic form factors for1≤Q2≤3(GeV/c)2at SLAC

Author: E. M. Riordan, B. Debebe, A. Para, M. W. Krasny, B. W. Filippone, R. G. Arnold, R. S. Hicks, R. Gearhart, Sridhara Dasu, J. Alster, F. Dietrich, L.W. Whitlow, G. deChambrier, J. Jourdan, J. Button-Shafer, D. Benton, P. de Barbaro, Karol Lang, L. Andivahis, R. D. McKeown, K. van Bibber, P. E. Bosted, D. H. Potterveld, A. Bodek, Ross Milner, S. E. Rock, Z. M. Szalata, A. Lung, H. Harada, and R. C. Walker
Subjects: Physics, Combinatorics, Scattering cross-section, Particle physics, Particle properties, Proton, Particle model, Theoretical models
Abstract: We report measurements of the proton form factors [ital G][sub [ital E]][sup [ital p]] and [ital G][sub [ital M]][sup [ital p]] extracted from elastic scattering in the range 1[le][ital Q][sup 2][le]3 (GeV/[ital c])[sup 2] with total uncertainties [lt] 15% in [ital G][sub [ital E]][sup [ital p]] and [lt] 3% in [ital G][sub [ital M]][sup [ital p]]. Comparisons are made to theoretical models, including those based on perturbative QCD, vector-meson dominance, QCD sum rules, and diquark constituents in the proton. The results for [ital G][sub [ital E]][sup [ital p]] are somewhat larger than indicated by most theoretical parametrizations, and the ratios of the Pauli and Dirac form factors [ital Q][sup 2]([ital F][sub 2][sup [ital p]]/[ital F][sub 1][sup [ital p]]) are lower in value and demonstrate a weaker [ital Q][sup 2] dependence than those predictions. A global extraction of the elastic form factors from several experiments in the range 0.1 [lt] [ital Q][sup 2] [lt] 10 (GeV/[ital c])[sup 2] is also presented.
Published: 1994
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86. Measurement of kinematic and nuclear dependence ofR=σLσTin deep inelastic electron scattering

Author: M. W. Krasny, P. E. Bosted, B. W. Filippone, B. Debebe, D. Benton, J. Button-Shafer, A. Lung, R. S. Hicks, A. Bodek, G. deChambrier, S. E. Rock, R. A. Gearhart, F. S. Dietrich, Ross Milner, K. van Bibber, Sridhara Dasu, H. Harada, R. G. Arnold, J. Alster, D. H. Potterveld, R. D. McKeown, L.W. Whitlow, R. C. Walker, J. Jourdan, L. Andivahis, A. Para, Z. M. Szalata, P. de Barbaro, Karol Lang, and E. M. Riordan
Subjects: Nuclear physics, Physics, Quantum chromodynamics, Particle physics, Scattering, EMC effect, Elementary particle, Twist, Inelastic scattering, Nucleon, Deep inelastic scattering
Abstract: We report results on a precision measurement of the ratio R=σ_L/σ_T in deep inelastic electron-nucleon scattering in the kinematic range 0.2≤x≤0.5 and 1≤Q^2≤10 (GeV/c)^2. Our results show, for the first time, a clear falloff of R with increasing Q^2. Our R results are in agreement with QCD predictions only when corrections for target mass effects and some additional higher twist effects are included. At small x, the data on R favor structure functions with a large gluon contribution. We also report results on the differences R_A-R_D and the cross section ratio σ^A/σ^D between Fe and Au nuclei and the deuteron. Our results for R_A-R_D are consistent with zero for all x, Q^2 indicating that possible contributions to R from nuclear higher twist effects and spin-0 constituents in nuclei are not different from those in nucleons. The ratios σ^A/σ^D from all recent experiments, at all x, Q^2 values, are now in agreement.
Published: 1994
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87. Irish thoracic society

Author: K. H. Chan, H. P. Singh, T. Aherne, U. Carabine, H. Gilliland, J. R. Johnston, K. G. Lowry, J. McGuigan, J. Cosgrove, D. Veerasingham, J. McCarthy, J. Hurley, A. E. Wood, R. Gilliland, J. A. McGuigan, K. G. McManus, P. Wilkinson, L. C. Johnston, J. MacMahon, D. Wilson, C. Austin, V. Anikin, K. McManus, J. R. P. Gibbons, R. Sharkey, M. Long, A. Maree, S. O’Neill, C. P. Maguire, J. P. Hayes, J. Masterson, M. X. Fitzgerald, M. Hayes, C. Quigley, A. Mofidi, R. Mofidi, M. O’Neill, J. B. G. Watson, E. T. O’Halloran, C. Shortt, M. Taylor, C. Holland, P. O’Lorcain, S. Pathmakanthan, S. Sreenan, C. K. Power, L. W. Poulter, C. M. Burke, D. Reilly, S. Doyle, C. Power, A. Goggin, P. Debenham, A. Southey, C. M. O’Connor, W. J. Bourke, T. J. McDonnell, J. B. Buck, T. R. A. Magee, R. C. Lowry, A. N. J. Graham, W. A. Owens, S. B. Kelly, R. W. Costelloe, J. Ryan, J. Collins, D. Guerin, D. Rooney, E. Long, M. O’Donnell, T. P. Cotter, C. P. Bredin, J. B. Buick, J. J. MacMahon, G. Finlay, D. Concannon, P. T. Reid, J. Alderdice, J. Carson, D. G. Sinnamon, S. Murphy, T. Scott, C. T. Keane, J. B. Walsh, D. Coakley, D. McKeown, P. Kelly, L. Clancy, J. L. Kiely, B. Cryan, P. Killeen, S. Farrell, D. M. O’Riordan, S. Sheehan, J. Curtain, J. Hogan, A. Malone, S. Ahmed, M. Murphy, W. Fennell, C. Keohane, C. M. Gleeson, A. J. Ritchie, S. E. H. Russell, E. Molloy, M. Keane, R. Coakley, R. Costello, C. Condron, R. G. W. Watson, C. Kelly, H. Redmond, W. Watson, P. Burke, D. Bouchier-Hayes, S. C. Donnelly, C. Haslett, I. Dransfield, C. E. Robertson, D. C. Carter, J. A. Ross, I. S. Grant, T. F. Tedder, L. G. Heaney, L. J. M. Cross, C. F. Stanford, Madeleine Ennis, L. Gergely, N. Deng, R. M. Rose, T. Hennessy, L. Hickey, L. Thornton, C. Collum, M. Durity, J. Power, H. Johnson, B. Lee, E. Doherty, E. Kelly, T. McDonnell, G. Varghese, J. Gibbons, N. H. Gower, and R. M. Rudd
Subjects: medicine.medical_specialty, business.industry, medicine.medical_treatment, General Medicine, medicine.disease, Cystic fibrosis, language.human_language, Respiratory Medicine, Irish, medicine, language, Continuous positive airway pressure, Intensive care medicine, business
Published: 1994
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88. Momentum transfer dependence of nuclear transparency from the quasielasticC12(e,e’p) reaction

Author: L. H. Tao, B. Mueller, C. E. Keppel, van Bibber K, B. W. Filippone, C. E. Jones, D. H. Potterveld, R. J. Holt, Naomi C R Makins, R. A. Gearhart, R. Ent, B. Zeidman, D. J. Margaziotis, M. B. Epstein, K. P. Coulter, Papavassiliou, S. E. Rock, Z. M. Szalata, Thomas O'Neill, H. J. Bulten, E. Belz, Haiyan Gao, J. O. Hansen, S. E. Kuhn, J. Nelson, Ross Milner, J. Arrington, H. E. Jackson, Michael Chapman, E. J. Beise, P. E. Bosted, M. Spengos, van den Brand Jf, Patratos Gg, J. L. White, E. R. Kinney, A. Lung, P. L. Anthony, R. G. Arnold, R. D. McKeown, Wolfgang Lorenzon, Kisoo Lee, D. F. Geesaman, J. Napolitano, and F. S. Dietrich
Subjects: Nuclear reaction, Physics, Scattering, Nuclear Theory, Momentum transfer, Hadron, General Physics and Astronomy, Nuclear physics, Baryon, Nuclear transparency, Atomic physics, Nuclear Experiment, Nucleon, Lepton
Abstract: The cross section for quasielastic ^(12)C(e,e’p) scattering has been measured at momentum transfer Q^2=1, 3, 5, and 6.8 (GeV/c)^2. The results are consistent with scattering from a single nucleon as the dominant process. The nuclear transparency is obtained and compared with theoretical calculations that incorporate color transparency effects. No significant rise of the transparency with Q^2 is observed.
Published: 1994
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89. Transverse Beam Spin Asymmetries at Backward Angles in Elastic Electron-Proton and Quasielastic Electron-Deuteron Scattering

Author: Marc Vanderhaeghen, J. Roche, M. K. Jones, Jay Benesch, J. Hansknecht, A. Lung, J. W. Martin, H. Breuer, W. F. Vulcan, Christophe Furget, S. F. Pate, H. Mkrtchyan, G. Flores, Michael Gericke, R. Suleiman, Darko Androić, S. Kox, G. Guillard, T. Seva, M. Stutzman, S. A. Page, J. Schaub, L. Lee, Douglas H Beck, Fatiha Benmokhtar, M. Muether, V. Papavassiliou, S. Wells, C. L. Capuano, T. Horn, R. D. McKeown, W. D. Ramsay, W. T. H. van Oers, P. Bosted, S. A. Wood, E. Voutier, D. T. Spayde, J. S. Real, M. Poelker, G. B. Franklin, C. A. Davis, D. Gaskell, B. Pasquini, P. M. King, B. P. Quinn, L. Bimbot, S. E. Williamson, Neven Simicevic, Y. C. Chao, Wolfgang Korsch, J. Birchall, Juliette Mammei, P. G. Roos, J. Grames, C. Ellis, M. Versteegen, S. K. Phillips, J. Arvieux, A. Micherdzinska, D. S. Armstrong, G. R. Smith, M. Mihovilovič, E. J. Beise, V. Tadevosyan, A. Coppens, Michael Pitt, S. L. Bailey, Junyu Liu, P. Pillot, 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), and G0
Subjects: Nuclear Theory, General Physics and Astronomy, axial-vector current, FOS: Physical sciences, Inelastic scattering, Mott scattering, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], strange quark, 01 natural sciences, Nuclear physics, Nuclear Theory (nucl-th), High Energy Physics - Phenomenology (hep-ph), parity-violating asymmetries, charge and magnetic nucleon form factors, 0103 physical sciences, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Elastic scattering, Physics, Quasielastic scattering, 010308 nuclear & particles physics, Scattering, Small-angle neutron scattering, NATURAL SCIENCES. Physics, PRIRODNE ZNANOSTI. Fizika, High Energy Physics - Phenomenology, Quasielastic neutron scattering, Physics::Accelerator Physics, High Energy Physics::Experiment, Scattering theory, Atomic physics
Abstract: We have measured the beam-normal single-spin asymmetries in elastic scattering of transversely polarized electrons from the proton, and performed the first measurement in quasi-elastic scattering on the deuteron, at backward angles (lab scattering angle of 108 degrees) for Q2 = 0.22 GeV^2/c^2 and 0.63 GeV^2/c^2 at beam energies of 362 MeV and 687 MeV, respectively. The asymmetry arises due to the imaginary part of the interference of the two-photon exchange amplitude with that of single photon exchange. Results for the proton are consistent with a model calculation which includes inelastic intermediate hadronic (piN) states. An estimate of the beam-normal single-spin asymmetry for the scattering from the neutron is made using a quasi-static deuterium approximation, and is also in agreement with theory.
Published: 2011
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90. Measurement of the 8B solar neutrino flux with the KamLAND liquid scintillator detector

Author: D. A. Dwyer, Yu. Efremenko, Hideki Watanabe, Y. Gando, M. Sakai, H. Ikeda, H. M. Steiner, Hitoshi Murayama, Sandip Pakvasa, Lindley Winslow, G. A. Horton-Smith, J. G. Learned, Yuri Kamyshkov, J. A. Detwiler, K. Tamae, Y. Takemoto, T. I. Banks, A. Suzuki, K. Nakajima, D. M. Markoff, J. Shirai, M. Batygov, F. Piquemal, Yasuhiro Kishimoto, B. E. Berger, E. Yonezawa, T. Mitsui, Y. Minekawa, C. E. Lane, Koichi Ichimura, Y. Kibe, J. Maricic, A. Kozlov, R. D. McKeown, Yasuhiro Shimizu, O. Perevozchikov, A. Piepke, N. Nagai, K. Tolich, R. W. Kadel, B. D. Xu, D. McKee, C. Mauger, K. E. Downum, C. Grant, Chao Zhang, Hugon J Karwowski, Ke Han, I. Shimizu, S. Abe, A. Gando, K. Furuno, K. Narita, B. K. Fujikawa, H. Yabumoto, Stuart J. Freedman, W. Kimura, H. Takahashi, J. S. Ricol, S. Matsuno, M. Koga, M. Nakamura, Giorgio Gratta, K. Nakamura, T. O'Donnell, T. Morikawa, Kunio Inoue, Werner Tornow, Hidetomo Yoshida, T. Bloxham, Sanshiro Enomoto, S. Yoshida, F. Suekane, T. Miletic, K. M. Heeger, N. Takahashi, M. P. Decowski, G. Keefer, A. Tang, Research Center for Neutrino Science [Sendai], Tohoku University [Sendai], Department of Physics [Berkeley], University of California [Berkeley], University of California-University of California, Lawrence Berkeley National Laboratory [Berkeley] (LBNL), Neutrino et Faibles Radioactivités (NEMO), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), KamLAND, and Other Research IHEF (IoP, FNWI)
Subjects: Nuclear and High Energy Physics, Particle physics, Solar neutrino, FOS: Physical sciences, Flux, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Scintillator, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Recoil, 0103 physical sciences, Nuclear Experiment (nucl-ex), 010306 general physics, Neutrino oscillation, Nuclear Experiment, Solar and Stellar Astrophysics (astro-ph.SR), Elastic scattering, Physics, Standard solar model, 010308 nuclear & particles physics, 3. Good health, Astrophysics - Solar and Stellar Astrophysics, High Energy Physics::Experiment, Neutrino
Abstract: We report a measurement of the neutrino-electron elastic scattering rate from 8B solar neutrinos based on a 123 kton-day exposure of KamLAND. The background-subtracted electron recoil rate, above a 5.5 MeV analysis threshold is 1.49+/-0.14(stat)+/-0.17(syst) events per kton-day. Interpreted as due to a pure electron flavor flux with a 8B neutrino spectrum, this corresponds to a spectrum integrated flux of 2.77+/-0.26(stat)+/-0.32(syst) x 10^6 cm^-2s^-1. The analysis threshold is driven by 208Tl present in the liquid scintillator, and the main source of systematic uncertainty is due to background from cosmogenic 11Be. The measured rate is consistent with existing measurements and with Standard Solar Model predictions which include matter enhanced neutrino oscillation., Comment: 6 pages, 3 figures
Published: 2011
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91. Transverse Momentum Dependent Parton Distribution/Fragmentation Functions at an Electron-Ion Collider

Author: M. Contalbrigo, Matthias Burkardt, J. C. Peng, Jian-Wei Qiu, Minghui Liu, Xin Qian, Daniël Boer, Dipangkar Dutta, Q. J. Ye, Zhong-Bo Kang, Peter Schweitzer, Z. T. Liang, H. Avakian, P. Rossi, X. Zhan, G. Laskaris, A. Prokudin, R. D. McKeown, Leonard Gamberg, J. Soffer, J.P. Chen, N. C. R. Makins, Cynthia Keppel, J. Huang, Y.-H. Zhang, Yujie Qiang, Bernhard Musch, E. Cisbani, J. Zhou, Feng Yuan, Q. Ye, W. Zheng, Donald Crabb, Franco Bradamante, Vincent Sulkosky, Mauro Anselmino, Yi Wang, Zein-Eddine Meziani, Andreas Metz, Haiyan Gao, D. Hasch, M. Huang, and Bo-Wen Xiao
Subjects: Quark, Particle physics, Nuclear and High Energy Physics, media_common.quotation_subject, FRAGMENTATION FUNCTIONS, Hadron, Nuclear Theory, FOS: Physical sciences, Parton, DRELL-YAN PROCESSES, Asymmetry, law.invention, High Energy Physics - Experiment, DEEP-INELASTIC SCATTERING, HARD-SCATTERING, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), law, Nuclear Experiment (nucl-ex), Collider, PION ELECTROPRODUCTION, Nuclear Experiment, media_common, Spin-½, Physics, FINAL-STATE INTERACTIONS, High Energy Physics::Phenomenology, SINGLE-SPIN, AZIMUTHAL ASYMMETRIES, Gluon, High Energy Physics - Phenomenology, SPIN PRODUCTION ASYMMETRIES, High Energy Physics::Experiment, HADRON STRUCTURE, Nucleon
Abstract: We present a summary of a recent workshop held at Duke University on Partonic Transverse Momentum in Hadrons: Quark Spin-Orbit Correlations and Quark-Gluon Interactions. The transverse momentum dependent parton distribution functions (TMDs), parton-to-hadron fragmentation functions, and multi-parton correlation functions, were discussed extensively at the Duke workshop. In this paper, we summarize first the theoretical issues concerning the study of partonic structure of hadrons at a future electron-ion collider (EIC) with emphasis on the TMDs. We then present simulation results on experimental studies of TMDs through measurements of single spin asymmetries (SSA) from semi-inclusive deep-inelastic scattering (SIDIS) processes with an EIC, and discuss the requirement of the detector for SIDIS measurements. The dynamics of parton correlations in the nucleon is further explored via a study of SSA in D (`D) production at large transverse momenta with the aim of accessing the unexplored tri-gluon correlation functions. The workshop participants identified the SSA measurements in SIDIS as a golden program to study TMDs in both the sea and valence quark regions and to study the role of gluons, with the Sivers asymmetry measurements as examples. Such measurements will lead to major advancement in our understanding of TMDs in the valence quark region, and more importantly also allow for the investigation of TMDs in the sea quark region along with a study of their evolution., Comment: 44 pages 23 figures, summary of Duke EIC workshop on TMDs accepted by EPJA
Published: 2011
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92. Constraints on theta 13 from a three-flavor oscillation analysis of reactor antineutrinos at KamLAND

Author: R. W. Kadel, B. D. Xu, Hugon J Karwowski, J. Maricic, A. Gando, D. M. Markoff, K. Narita, K. Nakamura, J. G. Learned, C. Grant, F. Suekane, K. E. Downum, M. P. Decowski, T. I. Banks, H. Takahashi, A. Piepke, Koichi Ichimura, G. Keefer, Giorgio Gratta, K. Tamae, Y. Takemoto, S. Matsuno, Hideki Watanabe, Y. Gando, C. E. Lane, B. E. Berger, J. Shirai, J. A. Detwiler, H. Ikeda, N. Nagai, Shijun Yoshida, T. O'Donnell, Yasuhiro Kishimoto, D. A. Dwyer, Chao Zhang, T. Morikawa, M. Sakai, H. M. Steiner, Werner Tornow, Hitoshi Murayama, G. A. Horton-Smith, Kunio Inoue, A. Suzuki, O. Perevozchikov, M. Koga, K. Nakajima, T. Bloxham, M. Batygov, T. Mitsui, B. K. Fujikawa, H. Yabumoto, Y. Kibe, A. Kozlov, Yu. Efremenko, K. M. Heeger, Sanshiro Enomoto, Ke Han, Stuart J. Freedman, R. D. McKeown, Hiroshi Yoshida, T. Miletic, N. Takahashi, Y. Minekawa, Yasuhiro Shimizu, I. Shimizu, and Other Research IHEF (IoP, FNWI)
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, CPT symmetry, Solar neutrino, Hadron, CHOOZ, High Energy Physics - Experiment, Baryon, Nuclear physics, Physics - Geophysics, Neutrino, Neutrino oscillation, Nuclear Experiment, Lepton
Abstract: We present new constraints on the neutrino oscillation parameters $/textyen Delta m^{2}_{21}$, $/textyen theta_{12}$, and $/textyen theta_{13}$ from a three-flavor analysis of solar and KamLAND data. The KamLAND data set includes data acquired following a radiopurity upgrade and amounts to a total exposure of $3.49 \textyen times 10^{32}$ target-proton-year. Under the assumption of {\textyen it CPT} invariance, a two-flavor analysis (/textyen mbox{$\textyen theta_{13} = 0$}) of the KamLAND and solar data yields the best-fit values $\textyen tan^{2} \textyen theta_{12} = 0.444^{+0.036}_{-0.030}$ and $\textyen Delta m^{2}_{21} = 7.50^{+0.19}_{-0.20} \textyen times 10^{-5} ~ {\textyen rm eV}^{2}$; a three-flavor analysis with $\textyen theta_{13}$ as a free parameter yields the best-fit values $\textyen tan^{2} \textyen theta_{12} = 0.452^{+0.035}_{-0.033}$, $\textyen Delta m^{2}_{21} = 7.50^{+0.19}_{-0.20} \textyen times 10^{-5} ~ {\textyen rm eV}^{2}$, and $\textyen sin^{2} \textyen theta_{13} = 0.020^{+0.016}_{-0.016}$. This $\textyen theta_{13}$ interval is consistent with other recent work combining the CHOOZ, atmospheric and long-baseline accelerator experiments. We also present a new global $\textyen theta_{13}$ analysis, incorporating the CHOOZ, atmospheric and accelerator data, which indicates $\textyen sin^{2} \textyen theta_{13} = 0.009^{+0.013}_{-0.007}$. A nonzero value is suggested, but only at the 79\textyen% C.L., Comment: 10 pages, 7 figures. Version as published in PRD. The dChi2-map and prompt energy spectrum for this analysis are available at http://www.awa.tohoku.ac.jp/KamLAND/4th_result_data_release/4th_result_data_release.html
Published: 2011

93. The G0 Experiment: Apparatus for Parity-Violating Electron Scattering Measurements at Forward and Backward Angles

Author: T. Horn, G. A. Rutledge, R. M. Laszewski, A. Kolarkar, R. Hasty, F. Merchez, E. Liatard, K. Grimm, W. F. Vulcan, J. Yun, H. C. Fenker, R. Carr, R. Suleiman, D. McKee, J. Roche, R. Neveling, K. Johnston, M. Versteegen, Raphael Noel Tieulent, A. Coppens, R. Frascaria, S. A. Wood, T. Averett, P. Pillot, S. Kox, D. Marchand, D. S. Armstrong, K. A. Griffioen, G. R. Smith, C. Yan, G. Guillard, J. Lachniet, E. Voutier, K. W. McFarlane, G. Quéméner, J. Schaub, L. Lee, D. S. Dale, Michael Gericke, A. Hawthorne Allen, Fatiha Benmokhtar, V. Zeps, E. J. Beise, M. Muether, R. Clark, D. J. Mack, Michael Pitt, Jay Benesch, Jonathan W. Martin, W. T. H. van Oers, T. A. Porcelli, J. A. Secrest, W. D. Ramsay, A. A. Cowley, S. Niccolai, H. Guler, C. L. Capuano, S. L. Bailey, J. Arvieux, N. S. Chant, L. Bimbot, P. Kammel, C. Ellis, Bryan J. Moffit, R. Asaturyan, G. Batigne, D. T. Spayde, W. R. Falk, P. M. King, Douglas H Beck, A. Micherdzinska, Takeyasu Ito, John Musson, R. D. McKeown, S. A. Page, S. Wells, J. Kuhn, Y. C. Chao, K. Nakahara, B. Guillon, S. E. Williamson, J. Grames, L. Hannelius, M. Morlet, H. Breuer, J. Van de Wiele, S. K. Phillips, J. Hansknecht, J. S. Real, A. S. Biselli, R. J. Woo, S. Covrig, M. K. Jones, J. Lenoble, S. Ong, H. Mkrtchyan, M. Poelker, D. Gaskell, S.G. Stepanyan, T. A. Forest, C. A. Davis, A. Lung, J. M. Finn, M. Stutzman, S. F. Pate, T. Seva, E. Korkmaz, A. W. Rauf, V. Papavassiliou, P. Brindza, G. A. MacLachlan, V. Tadevosyan, J. Birchall, R. Kazimi, C. Furget, Juliette Mammei, Glen A. Warren, Neven Simicevic, P. G. Roos, D. Nilsson, G. B. Franklin, K. Gustafsson, Wolfgang Korsch, Darko Androić, M. Mihovilovic, Jin Liu, P. Bosted, R. D. Carlini, T. Ries, B. P. Quinn, Mines Nantes (Mines Nantes), Laboratoire SUBATECH Nantes (SUBATECH), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), 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), and G0
Subjects: Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, FOS: Physical sciences, Electron, Mott scattering, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, magnetic spectrometer, liquid hydrogen target, polarized electron beam, parity-violation, electron scattering, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Instrumentation, Cherenkov radiation, Elastic scattering, Physics, Spectrometer, 010308 nuclear & particles physics, Scattering, Instrumentation and Detectors (physics.ins-det), Small-angle neutron scattering, Electron scattering
Abstract: In the G0 experiment, performed at Jefferson Lab, the parity-violating elastic scattering of electrons from protons and quasi-elastic scattering from deuterons is measured in order to determine the neutral weak currents of the nucleon. Asymmetries as small as 1 part per million in the scattering of a polarized electron beam are determined using a dedicated apparatus. It consists of specialized beam-monitoring and control systems, a cryogenic hydrogen (or deuterium) target, and a superconducting, toroidal magnetic spectrometer equipped with plastic scintillation and aerogel Cerenkov detectors, as well as fast readout electronics for the measurement of individual events. The overall design and performance of this experimental system is discussed., Comment: Submitted to Nuclear Instruments and Methods
Published: 2011
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94. Partial radiogenic heat model for Earth revealed by geoneutrino measurements

Author: Sanshiro Enomoto, D. A. Dwyer, B. E. Berger, M. Sakai, H. M. Steiner, Hitoshi Murayama, G. A. Horton-Smith, H. Ikeda, M. Batygov, Yasuhiro Kishimoto, D. M. Markoff, G. Keefer, Y. Kibe, A. Kozlov, Koichi Ichimura, N. Nagai, K. Nakajima, K. Tamae, B. K. Fujikawa, Y. Takemoto, Hidetomo Yoshida, H. Yabumoto, K. M. Heeger, S. Matsuno, Hugon J Karwowski, A. Piepke, K. Tolich, C. Grant, T. O'Donnell, Giorgio Gratta, T. Miletic, J. A. Detwiler, J. Shirai, A. Gando, Ke Han, T. Morikawa, Stuart J. Freedman, T. I. Banks, O. Perevozchikov, Hideki Watanabe, Y. Gando, I. Shimizu, K. Narita, N. Takahashi, H. Takahashi, R. W. Kadel, T. Bloxham, B. D. Xu, J. Maricic, R. D. McKeown, Y. Minekawa, S. Yoshida, A. Suzuki, Yasuhiro Shimizu, J. G. Learned, Chao Zhang, T. Mitsui, M. Koga, F. Suekane, Yuri Efremenko, Kunio Inoue, C. E. Lane, M. P. Decowski, K. E. Downum, K. Nakamura, Werner Tornow, and Other Research IHEF (IoP, FNWI)
Subjects: Physics, Radiogenic nuclide, Geoneutrino, Thorium, chemistry.chemical_element, Flux, Physics::Geophysics, Nuclear physics, chemistry, Heat flux, General Earth and Planetary Sciences, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Neutrino, Borexino, Radioactive decay
Abstract: The Earth has cooled since its formation, yet the decay of radiogenic isotopes, and in particular uranium, thorium and potassium, in the planet’s interior provides a continuing heat source. The current total heat flux from the Earth to space is 44:2±1.0 TW, but the relative contributions from residual primordial heat and radiogenic decay remain uncertain. However, radiogenic decay can be estimated from the flux of geoneutrinos, electrically neutral particles that are emitted during radioactive decay and can pass through the Earth virtually unaffected. Here we combine precise measurements of the geoneutrino flux from the Kamioka Liquid-Scintillator Antineutrino Detector, Japan, with existing measurements from the Borexino detector, Italy.We find that decay of uranium-238 and thorium-232 together contribute 20.0^(+8.8)_(-8.6)TW to Earth’s heat flux. The neutrinos emitted from the decay of potassium-40 are below the limits of detection in our experiments, but are known to contribute 4TW. Taken together, our observations indicate that heat from radioactive decay contributes about half of Earth’s total heat flux. We therefore conclude that Earth’s primordial heat supply has not yet been exhausted.
Published: 2011

95. The Jefferson Lab 12 GeV Upgrade

Author: R. D. McKeown, David Armstrong, Volker Burkert, Jian-Ping Chen, Will Detmold, Jo Dudek, Wally Melnitchouk, and David Richards
Subjects: Physics, Nuclear physics, Upgrade, Electron beam accelerator, Cathode ray, Physics::Accelerator Physics, Parity (physics), Polarization (waves)
Abstract: A major upgrade of the Continuous Electron Beam Accelerator Facility (CEBAF) at the Thomas Jefferson National Accelerator Facility is in progress. Construction began in 2008 and the project should be completed in 2015. The upgrade includes doubling the energy of the electron beam to 12 GeV, the addition of a new fourth experimental hall, and new experimental equipment in three of the experimental halls. A brief overview of this upgrade project is presented along with some highlights of the anticipated experimental program.
Published: 2011
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96. Two-body disintegration of the deuteron with 0.8–1.8 GeV photons

Author: Douglas H Beck, R. C. Walker, R. D. McKeown, D. Collins, Jim Napolitano, C. Marchand, Z. E. Meziani, R.S. Kowalczyk, D. F. Geesaman, G. Boyd, Ronald Gilman, B. W. Filippone, E. R. Kinney, R. J. Holt, J. E. Nelson, B. Zeidman, M.C. Green, R. E. Segel, C. E. Jones, R. G. Milner, P. E. Bosted, J. Jourdan, H. E. Jackson, R. C. Minehart, S. J. Freedman, T. Y. Tung, and D. H. Potterveld
Subjects: Nuclear reaction, Physics, Nuclear and High Energy Physics, Photon, Proton, Hadron, Bremsstrahlung, Baryon, Nuclear physics, Neutron, Atomic physics, Nuclear Experiment, Nucleon, Caltech Library Services
Abstract: The differential cross section for the reaction 2H(γ,p)n has been measured at several center-of-mass angles ranging from 50° to 143° for photon energies between 0.8 and 1.8 GeV. The experiment was performed at the SLAC-NPAS facility with the use of the 1.6 GeV/c spectrometer to detect the high energy protons produced by a bremsstrahlung beam directed at a liquid deuterium target. Contributions from concurrent disintegration by the residual electron beam were determined by measuring the proton yield without the Cu photon radiator. At angles not very far from 90°, the energy dependence of the cross sections is consistent with predictions of scaling using counting rules for constituent quarks. At least one theoretical calculation based on a meson-baryon picture of the reaction is able to reproduce the magnitude and energy dependence of the 90° cross section. The angular distribution exhibits a large enhancement at backward angles at the higher energies.
Published: 1993
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97. Coherent anti-stokes raman spectroscopy (CARS) and laser-induced fluorescence (LIF) measurements in a rocket engine plume☆

Author: D. R. Williams, A. G. Astill, K. M. Rawley, C. A. Baker, D. Mckeown, and F. M. Porter
Subjects: business.product_category, General Chemical Engineering, Analytical chemistry, General Physics and Astronomy, Energy Engineering and Power Technology, General Chemistry, Temperature measurement, Plume, Physics::Fluid Dynamics, symbols.namesake, Fuel Technology, Rocket, symbols, Environmental science, Coherent anti-Stokes Raman spectroscopy, Atomic physics, business, Laser-induced fluorescence, Spectroscopy, Raman spectroscopy, Physics::Atmospheric and Oceanic Physics, Water vapor
Abstract: Coherent anti-Stokes raman spectroscopy (CARS) and laser-induced fluorescence (LIF) measurements in the plume of a liquid-fueled rocket engine are compared with the results predicted by a mathematical model of the plume. Single-shot CARS nitrogen thermometry extensively mapped the temperature profile of the plume. At most positions, high signal success rates were obtained. Success rates were lower during initial runs, while the system was optimized for operation in the rocket environment, and on axis close to the nozzle where the probing laser beams were severely deflected by the plume. For each position studied, the spectra taken were fitted for temperature and a mean temperature and standard deviation calculated from the results. The mean temperatures were compared with predicted temperature values obtained from a marching procedure parabolic computer program. CARS spectra from water vapor in the plume were also recorded and fitted for temperature and concentration. Excellent agreement between theory and experiment was obtained. Results showed a strong positive correlation between water vapor concentration and temperature at each measurement position-some contributions to this may arise from similarities of the effects of temperature and concentration on spectral shape. However, shear layer mixing and entrainment of cold gas into the plume may significantly affect the composition and temperature of the plume gases. LIF was used to visualize the plume structure. Imaging of the flow field was performed by detecting sodium fluorescence, after the oxidant was seeded with sodium. Images were obtained without excessively high background levels and large fluctuations in the plume structure were observed. This is consistent with the observations from the CARS experiments.
Published: 1993
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98. High momentum transfer RT,L response functions for 3,4He

Author: T. Koh, R. C. Minehart, J.P. Chen, R. G. Milner, J. Jourdan, Douglas H Beck, G. Boyd, J. Mougey, R. M. Sealock, R. D. McKeown, L. M. Chinitz, W. Lorenzon, L. C. Dennis, G.E. Dodge, D. H. Potterveld, K. W. Kemper, S.T. Thornton, B. W. Fillipone, L. C. Smith, C. E. Woodward, J. Morgenstern, K. L. Giovanetti, Ingo Sick, Donal Day, Z. E. Meziani, J. S. McCarthy, R. C. Walker, and O. Rondon-Aramayo
Subjects: Physics, Nuclear and High Energy Physics, Scattering, Charge (physics), Electron, Nuclear physics, Transverse plane, medicine.anatomical_structure, Coulomb, medicine, Sum rule in quantum mechanics, Atomic physics, Nuclear Experiment, Nucleus, Electron scattering
Abstract: The tantalizing problem of the “quenching” of the Coulomb sum rule observed in medium weight nuclei is investigated in light nuclei at high momentum transfer. Inclusive electron scattering cross sections for 3,4He have been measured in the quasielastic region at electron energies between 0.9 GeV and 4.3 GeV, and scattering angles of 15° and 85°. Longitudinal (RL) and transverse (RT) response functions have been extracted using a Rosenbluth separation at constant ‖ q ‖ of 1.050 (GeV/c). The ratio of the longitudinal to the transverse reduced response functions in the negative y region reaches unity. The experimental Coulomb sum rule although with large uncertainty and conversly to the case of medium weight nuclei, saturates at high momentum to the He nucleus total charge namely Z=2.
Published: 1993
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99. Limits on neutrino oscillations fromν¯eappearance

Author: Elton Smith, W. Metcalf, J. W. Mitchell, S. J. Freedman, K. T. Lesko, T. A. Romanowski, G. T. Garvey, R. D. McKeown, J. B. Donahue, J. Napolitano, J. E. Nelson, M. Timko, A. R. Fazely, L. S. Durkin, T. Y. Ling, V. D. Sandberg, W. C. Choi, B. K. Fujikawa, R. L. Imlay, and R. W. Harper
Subjects: Scattering cross-section, Physics, Particle physics, Muon, Meson, Computer Science::Information Retrieval, High Energy Physics::Phenomenology, High Energy Physics::Experiment, Neutrino oscillation, Mathematical physics
Abstract: A 20-ton neutrino detector located near the Los Alamos Meson Physics Facility beam stop is used to search for [bar [nu]][sub [ital e]] generated via neutrino oscillations from any of the three neutrino types, [nu][sub [mu]], [bar [nu]][sub [mu]], and [nu][sub [ital e]], which radiate from the beam stop. The analysis of three years of data provides limits on the oscillation modes [bar [nu]][sub [mu]][r arrow][bar [nu]][sub [ital e]], [nu][sub [ital e]][r arrow][bar [nu]][sub [ital e]], and [nu][sub [mu]][r arrow][bar [nu]][sub [ital e]], and the lepton-number-violating decay process [mu][sup +][r arrow][ital e][sup +]+[bar [nu]][sub [ital e]]+[nu][sub [mu]]. The 90%-confidence-level limits for [bar [nu]][sub [mu]][r arrow][bar [nu]][sub [ital e]] oscillations are [delta][ital m][sup 2][le]0.14 eV[sup 2] for maximal mixing, and sin[sup 2]2[theta][le]0.024 for large [delta][ital m][sup 2].
Published: 1993
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100. NMR calibration of optical measurement of nuclear polarization inHe3

Author: R. D. McKeown, Haiyan Gao, Wolfgang Lorenzon, and T. R. Gentile
Subjects: Nuclear physics, Optical pumping, Physics, Spin polarization, Helium-3, Metastability, Calibration, Atomic physics, Adiabatic process, Polarization (waves), Atomic and Molecular Physics, and Optics, Circular polarization
Abstract: We have performed precise NMR measurements in order to calibrate a standard optical technique for measuring the polarization of 3He nuclei. This optical technique requires knowledge of the pressure-dependent relationship between the nuclear polarization and the degree of circular polarization of the 668-nm light emitted from a 3He discharge. We determined the nuclear polarization by comparing the adiabatic fast-passage NMR signal from samples of polarized 3He at pressures between 0.1 and 5 torr to an identical sample of water. For water, the polarization is known from statistical mechanics. The 3He is polarized using the metastability exchange technique for optical pumping of 3He. The accuracy of the calibration is ±2%, which is required for applications in nuclear physics.
Published: 1993
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