Precise measurement of the neutron d₂ at high Q²

Deep inelastic scattering of leptons off polarized targets has played a central role in understanding the spin structure of the nucleon. While the spin-structure function g₁ primarily reflects quark helicity distributions, g₂ contains information on quark-gluron correlations at leading order. The twist-3 matrix element d₂, defined as the third moment of a linear combination of g₁ and g₂, can be interpreted in terms of the average color Lorentz force experienced by a struck quark from the remnant diquark during the scattering process. To provide significantly improved data for the neutron d₂ at high Q², double-spin asymmetries and unpolarized cross sections were measured in inelastic scattering of longitudinally polarized electrons from polarized ³He nuclei at Jefferson Lab in Hall C. The data cover kinematic region 0.20 ≲ x_Bj ≲ 0.95 and 2.5 ≲ Q² ≲ 6.0 GeV²/c², with measurements taken at three distinct kinematic settings by adjusting the angles of the HMS and SHMS spectrometers with respect to the beam axis. This allowed for a precise extraction of neutron d₂ as a function of Q² by integrating the spin structure functions at constant Q² in each setting. In this talk, we will present preliminary results from this anslysis.