Different behaviour of the spin structure functions $g_1(x)$ and $h_1(x)$ at $x\to 0$

Abstract

We consider low-$x$ behaviour of the spin structure functions $g_1(x)$ and $h_1(x)$ in the unitarized chiral quark model which combines ideas on the constituent quark structure of hadrons with a geometrical scattering picture and unitarity. A nondiffractive singular low-$x$ dependence of $g_1^p(x)$ and $g_1^n(x)$ indicated by the recent SMC experimental data is described. A diffractive type smooth behaviour of $h_1(x)$ is predicted at small $x$. The expectations for the double-spin asymmetries in the low-mass Drell-Yan production at RHIC in the central region are discussed alongside.

LaTeX, 10 pages, 2 figures

References in corpus (6)

• Measurement of the Neutron Spin Structure Function $g_1^n$ with a Polarized ^3He Target
• Spin Structure of the Proton from Polarized Inclusive Deep-Inelastic Muon-Proton Scattering
• Next-to-Leading Order QCD Analysis of Polarized Deep Inelastic Scattering Data
• Double-Spin Transverse Asymmetries in Drell-Yan Processes
• Gluon polarization in transversely polarized nucleons and jet spin asymmetries at RHIC
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Cited by in corpus (1)

• On impact parameter dependence of low-x structure functions