Polarized light ions and spectator nucleon tagging at EIC
- Petersburg Nuclear Physics Institute, Gatchina, 188300, Russia
- JLAB
- Old Dominion University, Norfolk, VA 23529, USA
- Florida International University, Miami, FL 33199, USA
- Pennsylvania State University, University Park, PA 16802, USA
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. 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 ll 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 < p(R) < several 100MeV 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.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1163952
- Report Number(s):
- JLAB-THY-14-1913; arXiv:1407.3236; DOE/OR/23177-3126; R&D Project: 2013-LDRD-07
- Journal Information:
- Proceedings of Science, Vol. DIS, Issue 2014; Conference: DIS 2014, 28 Apr - 2 May 2014. Warsaw, Poland
- Country of Publication:
- United States
- Language:
- English
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