Spin polarizabilities of the nucleon
  Spin polarizabilities of the nucleon are discussed in the framework of fixed-t and backward-angle dispersion relations, chiral perturbation theory, and the non-relativistic quark model. Calculations with the dispersion relations generally confirm findings from HBChPT and disagree with a recent experimental result from LEGS for the backward spin polarizability. 
A. I. L'vov (Lebedev Inst.)