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Zhang YW, Long E, Mihovilovič M, et al. Measurement of the Target-Normal Single-Spin Asymmetry in Quasielastic Scattering from the Reaction (3)He(↑)(e,e'). Phys Rev Lett. 2015;115(17):172502doi: 10.1103/PhysRevLett.115.172502.
Zhang, Y. W., Long, E., Mihovilovič, M., Jin, G., Allada, K., Anderson, B., Annand, J. R., Averett, T., Ayerbe-Gayoso, C., Boeglin, W., Bradshaw, P., Camsonne, A., Canan, M., Cates, G. D., Chen, C., Chen, J. P., Chudakov, E., De Leo, R., Deng, X., Deur, A., Dutta, C., El Fassi, L., Flay, D., Frullani, S., Garibaldi, F., Gao, H., Gilad, S., Gilman, R., Glamazdin, O., Golge, S., Gomez, J., Hansen, O., Higinbotham, D. W., Holmstrom, T., Huang, J., Ibrahim, H., de Jager, C. W., Jensen, E., Jiang, X., St John, J., Jones, M., Kang, H., Katich, J., Khanal, H. P., King, P., Korsch, W., LeRose, J., Lindgren, R., Lu, H. J., Luo, W., Markowitz, P., Meziane, M., Michaels, R., Moffit, B., Monaghan, P., Muangma, N., Nanda, S., Norum, B. E., Pan, K., Parno, D., Piasetzky, E., Posik, M., Punjabi, V., Puckett, A. J., Qian, X., Qiang, Y., Qiu, X., Riordan, S., Ron, G., Saha, A., Sawatzky, B., Schiavilla, R., Schoenrock, B., Shabestari, M., Shahinyan, A., Širca, S., Subedi, R., Sulkosky, V., Tobias, W. A., Tireman, W., Urciuoli, G. M., Wang, D., Wang, K., Wang, Y., Watson, J., Wojtsekhowski, B., Ye, Z., Zhan, X., Zhang, Y., Zheng, X., Zhao, B., Zhu, L. (2015). Measurement of the Target-Normal Single-Spin Asymmetry in Quasielastic Scattering from the Reaction (3)He(↑)(e,e'). Physical review letters, 115(17), 172502. https://doi.org/10.1103/PhysRevLett.115.172502
Zhang, Y-W, et al. "Measurement of the Target-Normal Single-Spin Asymmetry in Quasielastic Scattering from the Reaction (3)He(↑)(e,e')." Physical review letters vol. 115,17 (2015): 172502. doi: https://doi.org/10.1103/PhysRevLett.115.172502
Zhang YW, Long E, Mihovilovič M, Jin G, Allada K, Anderson B, Annand JR, Averett T, Ayerbe-Gayoso C, Boeglin W, Bradshaw P, Camsonne A, Canan M, Cates GD, Chen C, Chen JP, Chudakov E, De Leo R, Deng X, Deur A, Dutta C, El Fassi L, Flay D, Frullani S, Garibaldi F, Gao H, Gilad S, Gilman R, Glamazdin O, Golge S, Gomez J, Hansen O, Higinbotham DW, Holmstrom T, Huang J, Ibrahim H, de Jager CW, Jensen E, Jiang X, St John J, Jones M, Kang H, Katich J, Khanal HP, King P, Korsch W, LeRose J, Lindgren R, Lu HJ, Luo W, Markowitz P, Meziane M, Michaels R, Moffit B, Monaghan P, Muangma N, Nanda S, Norum BE, Pan K, Parno D, Piasetzky E, Posik M, Punjabi V, Puckett AJ, Qian X, Qiang Y, Qiu X, Riordan S, Ron G, Saha A, Sawatzky B, Schiavilla R, Schoenrock B, Shabestari M, Shahinyan A, Širca S, Subedi R, Sulkosky V, Tobias WA, Tireman W, Urciuoli GM, Wang D, Wang K, Wang Y, Watson J, Wojtsekhowski B, Ye Z, Zhan X, Zhang Y, Zheng X, Zhao B, Zhu L. Measurement of the Target-Normal Single-Spin Asymmetry in Quasielastic Scattering from the Reaction (3)He(↑)(e,e'). Phys Rev Lett. 2015 Oct 23;115(17):172502. doi: 10.1103/PhysRevLett.115.172502. Epub 2015 Oct 22. PMID: 26551107.
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Phys Rev Lett. 2015 Oct 23;115(17):172502. doi: 10.1103/PhysRevLett.115.172502. Epub 2015 Oct 22.

Measurement of the Target-Normal Single-Spin Asymmetry in Quasielastic Scattering from the Reaction (3)He(↑)(e,e').

Physical review letters

Y-W Zhang, E Long, M Mihovilovič, G Jin, K Allada, B Anderson, J R M Annand, T Averett, C Ayerbe-Gayoso, W Boeglin, P Bradshaw, A Camsonne, M Canan, G D Cates, C Chen, J P Chen, E Chudakov, R De Leo, X Deng, A Deur, C Dutta, L El Fassi, D Flay, S Frullani, F Garibaldi, H Gao, S Gilad, R Gilman, O Glamazdin, S Golge, J Gomez, O Hansen, D W Higinbotham, T Holmstrom, J Huang, H Ibrahim, C W de Jager, E Jensen, X Jiang, J St John, M Jones, H Kang, J Katich, H P Khanal, P King, W Korsch, J LeRose, R Lindgren, H-J Lu, W Luo, P Markowitz, M Meziane, R Michaels, B Moffit, P Monaghan, N Muangma, S Nanda, B E Norum, K Pan, D Parno, E Piasetzky, M Posik, V Punjabi, A J R Puckett, X Qian, Y Qiang, X Qiu, S Riordan, G Ron, A Saha, B Sawatzky, R Schiavilla, B Schoenrock, M Shabestari, A Shahinyan, S Širca, R Subedi, V Sulkosky, W A Tobias, W Tireman, G M Urciuoli, D Wang, K Wang, Y Wang, J Watson, B Wojtsekhowski, Z Ye, X Zhan, Y Zhang, X Zheng, B Zhao, L Zhu,

Affiliations

  1. Rutgers University, New Brunswick, New Jersey 08901, USA.
  2. University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
  3. Kent State University, Kent, Ohio 44242, USA.
  4. Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia.
  5. University of Virginia, Charlottesville, Virginia 22908, USA.
  6. Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  7. Glasgow University, Glasgow G12 8QQ Scotland, United Kingdom.
  8. The College of William and Mary, Williamsburg, Virginia 23187, USA.
  9. Florida International University, Miami, Florida 33181, USA.
  10. Old Dominion University, Norfolk, Virginia 23529, USA.
  11. Hampton University, Hampton, Virginia 23669, USA.
  12. Università degli studi di Bari Aldo Moro, I-70121 Bari, Italy.
  13. University of Kentucky, Lexington, Kentucky 40506, USA.
  14. Temple University, Philadelphia, Pennsylvania 19122, USA.
  15. Istituto Nazionale Di Fisica Nucleare, INFN/Sanita, 00161 Roma, Italy.
  16. Duke University, Durham, North Carolina 27708, USA.
  17. Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
  18. Kharkov Institute of Physics and Technology, Kharkov 61108, Ukraine.
  19. Longwood University, Farmville, Virginia 23909, USA.
  20. Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  21. Cairo University, Cairo, Giza 12613, Egypt.
  22. Christopher Newport University, Newport News, Virginia 23606, USA.
  23. Seoul National University, Seoul 151-742, Korea.
  24. Ohio University, Athens, Ohio 45701, USA.
  25. Huangshan University, Tunxi, Huangshan City, Anhui Province 245041, People's Republic of China.
  26. Lanzhou University, Lanzhou, Gansu 730000, People's Republic of China.
  27. Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
  28. Tel Aviv University, Tel Aviv 69978, Israel.
  29. Norfolk State University, Norfolk, Virginia 23504, USA.
  30. Hebrew University of Jerusalem, Jerusalem 91904, Israel.
  31. Northern Michigan University, Marquette, Michigan 49855, USA.
  32. Yerevan Physics Institute, Yerevan 375036, Armenia.
  33. University of Ljubljana, SI-1000 Ljubljana, Slovenia.
  34. George Washington University, Washington, D.C. 20052, USA.
  35. University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.

PMID: 26551107 DOI: 10.1103/PhysRevLett.115.172502

Abstract

We report the first measurement of the target single-spin asymmetry, A(y), in quasielastic scattering from the inclusive reaction (3)He(↑)(e,e') on a (3)He gas target polarized normal to the lepton scattering plane. Assuming time-reversal invariance, this asymmetry is strictly zero for one-photon exchange. A nonzero A(y) can arise from the interference between the one- and two-photon exchange processes which is sensitive to the details of the substructure of the nucleon. An experiment recently completed at Jefferson Lab yielded asymmetries with high statistical precision at Q(2)=0.13, 0.46, and 0.97  GeV(2). These measurements demonstrate, for the first time, that the (3)He asymmetry is clearly nonzero and negative at the 4σ-9σ level. Using measured proton-to-(3)He cross-section ratios and the effective polarization approximation, neutron asymmetries of -(1-3)% were obtained. The neutron asymmetry at high Q(2) is related to moments of the generalized parton distributions (GPDs). Our measured neutron asymmetry at Q(2)=0.97  GeV(2) agrees well with a prediction based on two-photon exchange using a GPD model and thus provides a new, independent constraint on these distributions.

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