Diffractive effects in spin-flip pp amplitudes and predictions for   relativistic energies
  We analyze the diffractive (Pomeron) contribution to pp spin-flip amplitude and discuss the possible scenarios for energies available at the Relativistic Heavy-Ion Collider (RHIC). In particular, we show that RHIC data will be instrumental in assessing the real contribution of diffraction to spin amplitudes. 
A. F. Martini and E. Predazzi