Physics Letters B (Oct 2019)
Measurement of the single-spin asymmetry Ay0 in quasi-elastic 3He↑(e,e′n) scattering at 0.4 < Q2 < 1.0 GeV/c2
- E. Long,
- Y.W. Zhang,
- M. Mihovilovič,
- G. Jin,
- V. Sulkosky,
- A. Kelleher,
- B. Anderson,
- D.W. Higinbotham,
- S. Širca,
- K. Allada,
- J.R.M. Annand,
- T. Averett,
- W. Bertozzi,
- 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,
- J.-O. Hansen,
- T. Holmstrom,
- J. Huang,
- H. Ibrahim,
- C.W. de Jager,
- E. Jensen,
- X. Jiang,
- M. Jones,
- H. Kang,
- J. Katich,
- H.P. Khanal,
- P.M. 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. Qui,
- S. Riordan,
- A. Saha,
- B. Sawatzky,
- M. Shabestari,
- A. Shahinyan,
- B. Shoenrock,
- J. St. John,
- R. Subedi,
- 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
- E. Long
- University of New Hampshire, Durham, NH, 03824, USA; Corresponding author.
- Y.W. Zhang
- Rutgers University, New Brunswick, NJ, 08901, USA
- M. Mihovilovič
- Jožef Stefan Institute, Ljubljana 1000, Slovenia
- G. Jin
- University of Virginia, Charlottesville, VA, 22908, USA
- V. Sulkosky
- Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- A. Kelleher
- Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- B. Anderson
- Kent State University, Kent, OH, 44242, USA
- D.W. Higinbotham
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- S. Širca
- Jožef Stefan Institute, Ljubljana 1000, Slovenia
- K. Allada
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- J.R.M. Annand
- Glasgow University, Glasgow, G12 8QQ, Scotland, United Kingdom
- T. Averett
- The College of William and Mary, Williamsburg, VA, 23187, USA
- W. Bertozzi
- Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- W. Boeglin
- Florida International University, Miami, FL, 33181, USA
- P. Bradshaw
- The College of William and Mary, Williamsburg, VA, 23187, USA
- A. Camsonne
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- M. Canan
- Old Dominion University, Norfolk, VA, 23508, USA
- G.D. Cates
- University of Virginia, Charlottesville, VA, 22908, USA
- C. Chen
- Hampton University, Hampton, VA, 23669, USA
- J.-P. Chen
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- E. Chudakov
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- R. De Leo
- Universite di Bari, Bari, 70121 Italy
- X. Deng
- University of Virginia, Charlottesville, VA, 22908, USA
- A. Deur
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- C. Dutta
- University of Kentucky, Lexington, KY, 40506, USA
- L. El Fassi
- Rutgers University, New Brunswick, NJ, 08901, USA
- D. Flay
- Temple University, Philadelphia, PA, 19122, USA
- S. Frullani
- Istituto Nazionale Di Fisica Nucleare, INFN/Sanita, Roma, Italy
- F. Garibaldi
- Istituto Nazionale Di Fisica Nucleare, INFN/Sanita, Roma, Italy
- H. Gao
- Duke University, Durham, NC, 27708, USA
- S. Gilad
- Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- R. Gilman
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- O. Glamazdin
- Kharkov Institute of Physics and Technology, Kharkov 61108, Ukraine
- S. Golge
- Old Dominion University, Norfolk, VA, 23508, USA
- J. Gomez
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- J.-O. Hansen
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- T. Holmstrom
- Longwood University, Farmville, VA, 23909, USA
- J. Huang
- Massachusetts Institute of Technology, Cambridge, MA, 02139, USA; Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
- H. Ibrahim
- Cairo University, Cairo, Giza 12613, Egypt
- C.W. de Jager
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- E. Jensen
- Christopher Newport University, Newport News, VA, 23606, USA
- X. Jiang
- Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
- M. Jones
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- H. Kang
- Seoul National University, Seoul, Republic of Korea
- J. Katich
- The College of William and Mary, Williamsburg, VA, 23187, USA
- H.P. Khanal
- Florida International University, Miami, FL, 33181, USA
- P.M. King
- Ohio University, Athens, OH, 45701, USA
- W. Korsch
- University of Kentucky, Lexington, KY, 40506, USA
- J. LeRose
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- R. Lindgren
- University of Virginia, Charlottesville, VA, 22908, USA
- H.-J. Lu
- Huangshan University, People's Republic of China
- W. Luo
- Lanzhou University, Lanzhou, Gansu, 730000, People's Republic of China
- P. Markowitz
- Florida International University, Miami, FL, 33181, USA
- M. Meziane
- The College of William and Mary, Williamsburg, VA, 23187, USA
- R. Michaels
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- B. Moffit
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- P. Monaghan
- Hampton University, Hampton, VA, 23669, USA
- N. Muangma
- Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- S. Nanda
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- B.E. Norum
- University of Virginia, Charlottesville, VA, 22908, USA
- K. Pan
- Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- D. Parno
- Carnegie Mellon University, Pittsburgh, PA, 15213, USA
- E. Piasetzky
- Tel Aviv University, Tel Aviv 69978, Israel
- M. Posik
- Temple University, Philadelphia, PA, 19122, USA
- V. Punjabi
- Norfolk State University, Norfolk, VA, 23504, USA
- A.J.R. Puckett
- Massachusetts Institute of Technology, Cambridge, MA, 02139, USA; Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
- X. Qian
- Duke University, Durham, NC, 27708, USA
- Y. Qiang
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- X. Qui
- Lanzhou University, Lanzhou, Gansu, 730000, People's Republic of China
- S. Riordan
- University of Virginia, Charlottesville, VA, 22908, USA; Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- A. Saha
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- B. Sawatzky
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- M. Shabestari
- University of Virginia, Charlottesville, VA, 22908, USA
- A. Shahinyan
- Yerevan Physics Institute, Yerevan, Armenia
- B. Shoenrock
- Northern Michigan University, Marquette, MI, 49855, USA
- J. St. John
- Longwood University, Farmville, VA, 23909, USA
- R. Subedi
- George Washington University, Washington, DC, 20052, USA
- W.A. Tobias
- University of Virginia, Charlottesville, VA, 22908, USA
- W. Tireman
- Northern Michigan University, Marquette, MI, 49855, USA
- G.M. Urciuoli
- Istituto Nazionale Di Fisica Nucleare, INFN/Sanita, Roma, Italy
- D. Wang
- University of Virginia, Charlottesville, VA, 22908, USA
- K. Wang
- University of Virginia, Charlottesville, VA, 22908, USA
- Y. Wang
- University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
- J. Watson
- Kent State University, Kent, OH, 44242, USA
- B. Wojtsekhowski
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- Z. Ye
- Hampton University, Hampton, VA, 23669, USA
- X. Zhan
- Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Y. Zhang
- Lanzhou University, Lanzhou, Gansu, 730000, People's Republic of China
- X. Zheng
- University of Virginia, Charlottesville, VA, 22908, USA
- B. Zhao
- The College of William and Mary, Williamsburg, VA, 23187, USA
- L. Zhu
- Hampton University, Hampton, VA, 23669, USA
- Journal volume & issue
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Vol. 797
Abstract
Due to the lack of free neutron targets, studies of the structure of the neutron are typically made by scattering electrons from either 2H or 3He targets. In order to extract useful neutron information from a 3He target, one must understand how the neutron in a 3He system differs from a free neutron by taking into account nuclear effects such as final state interactions and meson exchange currents. The target single spin asymmetry Ay0 is an ideal probe of such effects, as any deviation from zero indicates effects beyond plane wave impulse approximation. New measurements of the target single spin asymmetry Ay0 at Q2 of 0.46 and 0.96 (GeV/c)2 were made at Jefferson Lab using the quasi-elastic He↑3(e,e′n) reaction. Our measured asymmetry decreases rapidly, from >20% at Q2=0.46 (GeV/c)2 to nearly zero at Q2=0.96 (GeV/c)2, demonstrating the fall-off of the reaction mechanism effects as Q2 increases. We also observed a small ϵ-dependent increase in Ay0 compared to previous measurements, particularly at moderate Q2. This indicates that upcoming high Q2 measurements from the Jefferson Lab 12 GeV program can cleanly probe neutron structure from polarized 3He using plane wave impulse approximation. Keywords: Neutron, Quasi-elastic, Polarized, 3He, Electron scattering, Single spin asymmetry
