Spin structure functions of 3He at finite Q^2

TL;DR

This paper investigates how nuclear effects influence the spin-dependent structure functions of helium-3 at finite momentum transfer Q^2, revealing significant broadening and suppression effects in resonance and deep inelastic regions.

Contribution

It introduces new relations between nuclear and nucleon spin structure functions at finite Q^2 and compares them with standard large-Q^2 convolution models.

Findings

Significant broadening of nucleon momentum distributions at finite Q^2.

Additional suppression of nuclear g_1 and g_2 near resonance peaks.

Differences between finite-Q^2 results and large-Q^2 approximations.

Abstract

Using recently derived relations between spin-dependent nuclear and nucleon g_1 and g_2 structure functions at finite Q^2, we study nuclear effects in 3He in the nucleon resonance and deep inelastic regions. Comparing the finite-Q^2 results with the standard convolution formulas obtained in the large-Q^2 limit, we find significant broadening of the effective nucleon momentum distribution functions, leading to additional suppression of the nuclear g_1 and g_2 structure functions around the resonance peaks.