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Title: Neutron spin structure with polarized deuterons and spectator proton tagging at EIC

The neutron's deep-inelastic structure functions provide essential information for the flavor separation of the nucleon parton densities, the nucleon spin decomposition, and precision studies of QCD phenomena in the flavor-singlet and nonsinglet sectors. Thus, traditional inclusive measurements on nuclear targets are limited by dilution from scattering on protons, Fermi motion and binding effects, final-state interactions, and nuclear shadowing at x << 0.1. An Electron-Ion Collider (EIC) would enable next-generation measurements of neutron structure with polarized deuteron beams and detection of forward-moving spectator protons over a wide range of recoil momenta (0 < pR << several 100 MeV in the nucleus rest frame). The free neutron structure functions could be obtained by extrapolating the measured recoil momentum distributions to the on-shell point. The method eliminates nuclear modifications and can be applied to polarized scattering, as well as to semi-inclusive and exclusive final states. We review the prospects for neutron structure measurements with spectator tagging at EIC, the status of R&D efforts, and the accelerator and detector requirements.
 [1] ;  [2] ;  [3] ;  [4] ;  [4] ;  [3] ;  [4] ;  [5] ;  [6] ;  [3]
  1. Ghent Univ., Gent (Belgium)
  2. Petersburg Nuclear Physics Institute, Gatchina (Russia)
  3. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  4. Old Dominion Univ., Norfolk, VA (United States)
  5. Florida Intl Univ., Miami, FL (United States)
  6. Pennsylvania State Univ., University Park, PA (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
JLAB-THY-14-1955; arXiv:1409.5768; DOE/OR/23177-3183
Journal ID: ISSN 1742-6588
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Journal of Physics. Conference Series
Additional Journal Information:
Journal Volume: 543; Conference: Tensor Polarized Solid Target Workshop, Newport News, VA (United States), 10-12 Mar 2014; Journal ID: ISSN 1742-6588
IOP Publishing
Research Org:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States