====== TTP99-26 Spin Dependence of Deep Inelastic Diffraction ======
 
 
   <hidden TTP99-26  Spin Dependence of Deep Inelastic Diffraction > Using a perturbative model for diffractive interactions, we derive an 
 expression for the polarized diffractive structure function $g_1^D$ 
 in the high energy limit. This structure function is given by the
 interference of diffractive amplitudes with polarized and unpolarized
 exchanges. For the polarized exchange we consider both two-gluon and 
 quark-antiquark amplitudes. The polarized diffractive amplitude 
 receives sizable contributions from non-strongly ordered regions in phase 
 space, resulting in a double logarithmic enhancement at small $x$. The 
 resummation of these double logarithmic terms is outlined. We also discuss 
 the transition from our perturbative expression to the nonperturbative 
 region. A first numerical estimate indicates that the perturbative 
 contribution to the spin asymmetry is substantially larger than the 
 nonperturbative one.
 </hidden>
|**J. Bartels, T. Gehrmann and M.G. Ryskin**  | 
|**  Eur. Phys. J.  C11 325-333 1999  **  |
| {{preprints:1999:ttp99-26.pdf|PDF}} {{preprints:1999:ttp99-26.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/9906204|arXiv]]   |
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