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Measurement of the target-normal single-spin asymmetry in deep-inelastic scattering from the reaction (3)He(↑)(e,e')X.
Katich, J; Qian, X; Zhao, Y X; Allada, K; Aniol, K; Annand, J R M; Averett, T; Benmokhtar, F; Bertozzi, W; Bradshaw, P C; Bosted, P; Camsonne, A; Canan, M; Cates, G D; Chen, C; Chen, J-P; Chen, W; Chirapatpimol, K; Chudakov, E; Cisbani, E; Cornejo, J C; Cusanno, F; Dalton, M M; Deconinck, W; de Jager, C W; De Leo, R; Deng, X; Deur, A; Ding, H; Dolph, P A M; Dutta, C; Dutta, D; El Fassi, L; Frullani, S; Gao, H; Garibaldi, F; Gaskell, D; Gilad, S; Gilman, R; Glamazdin, O; Golge, S; Guo, L; Hamilton, D; Hansen, O; Higinbotham, D W; Holmstrom, T; Huang, J; Huang, M; Ibrahim, H F; Iodice, M.
Afiliación
  • Katich J; College of William and Mary, Williamsburg, Virginia 23187, USA and University of Colorado, Boulder, Colorado 80309, USA.
  • Qian X; Duke University, Durham, North Carolina 27708, USA and Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA and Brookhaven National Laboratory, Upton, New York 11973, USA.
  • Zhao YX; University of Science and Technology of China, Hefei 230026, People's Republic of China.
  • Allada K; University of Kentucky, Lexington, Kentucky 40506, USA.
  • Aniol K; California State University, Los Angeles, Los Angeles, California 90032, USA.
  • Annand JR; University of Glasgow, Glasgow G12 8QQ, Scotland, United Kingdom.
  • Averett T; College of William and Mary, Williamsburg, Virginia 23187, USA.
  • Benmokhtar F; Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
  • Bertozzi W; Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
  • Bradshaw PC; College of William and Mary, Williamsburg, Virginia 23187, USA.
  • Bosted P; College of William and Mary, Williamsburg, Virginia 23187, USA.
  • Camsonne A; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Canan M; Old Dominion University, Norfolk, Virginia 23529, USA.
  • Cates GD; University of Virginia, Charlottesville, Virginia 22904, USA.
  • Chen C; Hampton University, Hampton, Virginia 23187, USA.
  • Chen JP; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Chen W; Duke University, Durham, North Carolina 27708, USA.
  • Chirapatpimol K; University of Virginia, Charlottesville, Virginia 22904, USA.
  • Chudakov E; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Cisbani E; INFN, Sezione di Roma, I-00161 Rome, Italy and Istituto Superiore di Sanità, I-00161 Rome, Italy.
  • Cornejo JC; California State University, Los Angeles, Los Angeles, California 90032, USA.
  • Cusanno F; INFN, Sezione di Roma, I-00161 Rome, Italy and Istituto Superiore di Sanità, I-00161 Rome, Italy.
  • Dalton MM; University of Virginia, Charlottesville, Virginia 22904, USA.
  • Deconinck W; Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
  • de Jager CW; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and University of Virginia, Charlottesville, Virginia 22904, USA.
  • De Leo R; INFN, Sezione di Bari and University of Bari, I-70126 Bari, Italy.
  • Deng X; University of Virginia, Charlottesville, Virginia 22904, USA.
  • Deur A; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Ding H; University of Virginia, Charlottesville, Virginia 22904, USA.
  • Dolph PA; University of Virginia, Charlottesville, Virginia 22904, USA.
  • Dutta C; University of Kentucky, Lexington, Kentucky 40506, USA.
  • Dutta D; Mississippi State University, Mississippi State, Minnesota 39762, USA.
  • El Fassi L; Old Dominion University, Norfolk, Virginia 23529, USA and Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA.
  • Frullani S; INFN, Sezione di Roma, I-00161 Rome, Italy and Istituto Superiore di Sanità, I-00161 Rome, Italy.
  • Gao H; Duke University, Durham, North Carolina 27708, USA.
  • Garibaldi F; INFN, Sezione di Roma, I-00161 Rome, Italy and Istituto Superiore di Sanità, I-00161 Rome, Italy.
  • Gaskell D; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Gilad S; Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
  • Gilman R; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA.
  • Glamazdin O; Kharkov Institute of Physics and Technology, Kharkov 61108, Ukraine.
  • Golge S; Old Dominion University, Norfolk, Virginia 23529, USA.
  • Guo L; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • Hamilton D; University of Glasgow, Glasgow G12 8QQ, Scotland, United Kingdom.
  • Hansen O; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Higinbotham DW; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Holmstrom T; Longwood University, Farmville, Virginia 23909, USA.
  • Huang J; Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
  • Huang M; Duke University, Durham, North Carolina 27708, USA.
  • Ibrahim HF; Cairo University, Giza 12613, Egypt.
  • Iodice M; INFN, Sezione di Roma3, I-00146 Rome, Italy.
Phys Rev Lett ; 113(2): 022502, 2014 Jul 11.
Article en En | MEDLINE | ID: mdl-25062169
ABSTRACT
We report the first measurement of the target-normal single-spin asymmetry in deep-inelastic scattering from the inclusive reaction 3)He(↑)(e,e')X on a polarized (3)He gas target. Assuming time-reversal invariance, this asymmetry is strictly zero in the Born approximation but can be nonzero if two-photon-exchange contributions are included. The experiment, conducted at Jefferson Lab using a 5.89 GeV electron beam, covers a range of 1.7Neutron asymmetries were extracted using the effective nucleon polarization and measured proton-to-(3)He cross-section ratios. The measured neutron asymmetries are negative with an average value of (-1.09±0.38)×10(-2) for invariant mass W>2 GeV, which is nonzero at the 2.89σ level. Our measured asymmetry agrees both in sign and magnitude with a two-photon-exchange model prediction that uses input from the Sivers transverse momentum distribution obtained from semi-inclusive deep-inelastic scattering.
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Banco de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Año: 2014 Tipo del documento: Article
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Banco de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Año: 2014 Tipo del documento: Article