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IHEP 97 - 31
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| Troshin S.M. and Tyurin N.E. | ||
| Different behaviour of the spin structure functions g1(x) and h1(x) at x --> 0 | ||
| Protvino, 1997.- p.10, figs. 2, refs.:20. | ||
We consider a 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 $g^p_1(x)$ 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. PACS: 11.80.Fv, 13.60.Hb, 13.88.+e spin structure functions, unitarity, low-x.
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