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Volume 346 - 23rd International Spin Physics Symposium (SPIN2018) - Parallel Session: Future Facilities and Experiments (Y. Furletova and Y. Ilieva)
Longitudinal spin asymmetries in polarized deuteron DIS with spectator tagging
W. Cosyn,* C. Weiss
*corresponding author
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Pre-published on: 2019 August 19
Published on: 2019 August 23
Polarized electron-deuteron DIS with spectator proton tagging provides a method for measuring the neutron spin structure functions with maximal theoretical control of nuclear effects. We calculate the nuclear structure factors in the longitudinal double-spin asymmetries
using methods of light-front nuclear structure. A unique feature of the spin-1 system is that spin asymmetries can be formed either relative to the cross section in all three spin states ($\lambda_d = \pm 1, 0$) or in the two maximum-spin states only ($\pm 1$, involving tensor polarization). We find that the two-state deuteron spin asymmetry at small spectator proton momenta permits accurate extraction of the neutron structure function $g_{1n}$. Such measurements could be performed at a future electron-ion collider (EIC) with polarized deuteron beams and suitable forward detectors.
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