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Measurement of the Target-Normal Single-Spin Asymmetry in Deep-Inelastic Scattering from the Reaction He3 ↑ (e,e')X

Journal Article · · Physical Review Letters
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  1. College of William and Mary, Williamsburg, VA (United States); Univ. of Colorado, Boulder, CO (United States); Mississippi State University
  2. Duke Univ., Durham, NC (United States); California Institute of Technology (CalTech), Pasadena, CA (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Univ. of Science and Technology of China, Hefei (China)
  4. Univ. of Kentucky, Lexington, KY (United States)
  5. California State Univ. (CalState), Los Angeles, CA (United States)
  6. Univ. of Glasgow, Scotland (United Kingdom)
  7. College of William and Mary, Williamsburg, VA (United States)
  8. Carnegie Mellon Univ., Pittsburgh, PA (United States)
  9. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  10. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  11. Old Dominion Univ., Norfolk, VA (United States)
  12. Univ. of Virginia, Charlottesville, VA (United States)
  13. Hampton Univ., Hampton, VA (United States)
  14. Duke Univ., Durham, NC (United States)
  15. National Inst. of Nuclear Physics (INFN), Rome (Italy); Higher Inst. of Health (ISS), Rome (Italy)
  16. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Univ. of Virginia, Charlottesville, VA (United States)
  17. Univ. of Bari (Italy); National Inst. of Nuclear Physics (INFN), Bari (Italy)
  18. Mississippi State Univ., Mississippi State, MS (United States)
  19. Old Dominion Univ., Norfolk, VA (United States); Rutgers Univ., Piscataway, NJ (United States)
  20. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Rutgers Univ., Piscataway, NJ (United States)
  21. National Academy of Sciences of Ukraine (NASU), Kharkov (Ukraine). National Scientific Centre, Kharkov Inst. of Physics and Technology (KIPT)
  22. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  23. Longwood Univ., Farmville, VA (United States)
  24. Cairo Univ., Giza (Egypt)
  25. National Inst. of Nuclear Physics (INFN), Rome (Italy)
  26. Rutgers Univ., Piscataway, NJ (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  27. Kyungpook National Univ., Daegu (Korea, Republic of)
  28. China Inst. of Atomic Energy (CIAE), Beijing (China)
  29. Univ. of New Hampshire, Durham, NH (United States)
  30. Florida International Univ., Miami, FL (United States)
  31. Univ. of Massachusetts, Amherst, MA (United States)
  32. Temple Univ., Philadelphia, PA (United States)
  33. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  34. Blaise Pascal Univ., Aubière (France)
  35. Seoul National Univ. (Korea, Republic of)
  36. National Inst. of Nuclear Physics (INFN), Genova (Italy)
  37. Univ. of Illinois at Urbana-Champaign, IL (United States)
  38. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  39. Duke Univ., Durham, NC (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  40. Syracuse Univ., NY (United States)
  41. Rutgers Univ., Piscataway, NJ (United States)
  42. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Temple Univ., Philadelphia, PA (United States)
  43. Yerevan Physics Inst. (YerPhI) (Armenia)
  44. Univ. of Ljubljana (Slovenia)
  45. Lanzhou Univ. (China)
  46. Hampton Univ., Hampton, VA (United States); Univ. of Illinois at Urbana-Champaign, IL (United States)
+ Show Author Affiliations
We report here the first measurement of the target-normal single-spin asymmetry in deep-inelastic scattering from the inclusive reaction He3 ↑ (e,e')X on a polarized He3 gas target. Assuming time-reversal invariance, this asymmetry is strictly zero in the Born approximation but can be nonzero if two-photon-exchange contributions are included. The experiment, conducted at Jefferson Lab using a 5.89 GeV electron beam, covers a range of 1.7<W<2.9GeV , 1.0<Q2<4.0GeV2 and 0.16<x<0.65 . Neutron asymmetries were extracted using the effective nucleon polarization and measured proton-to- He3 cross-section ratios. The measured neutron asymmetries shown are negative with an average value of (-1.09±0.38)×10-2 for invariant mass W>2GeV , 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.
Research Organization:
Mississippi State Univ., Mississippi State, MS (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Organization:
National Science Foundation; UK Science and Technology Facilities Council; USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Grant/Contract Number:
AC05-06OR23177; FG02-07ER41528
OSTI ID:
1599864
Alternate ID(s):
OSTI ID: 1136703
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 2 Vol. 113; ISSN 0031-9007; ISSN PRLTAO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (10)

The spin structure of the nucleon journal January 2005
The spin structure of the nucleon journal January 1994
The spin structure of the nucleon journal June 2019
Transverse single-spin asymmetries in p ↑ p → γ X from quark-gluon-quark correlations in the proton journal January 2015
Operator constraints for twist-3 functions and Lorentz invariance properties of twist-3 observables journal March 2016
Measurement of the Target-Normal Single-Spin Asymmetry in Quasielastic Scattering from the Reaction He 3 ↑ ( e , e ′   ) journal October 2015
Optically polarized He 3 journal December 2017
The Spin Structure of the Nucleon: Proceeding of International School of Nucleon Structure: 1st Course conference April 2017
Transverse spin observables in hard-scattering hadronic processes within collinear factorization journal November 2016
Operator Constraints for Twist-3 Functions and Lorentz Invariance Properties of Twist-3 Observables text January 2015

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS