The generalized forward spin polarizabilities γ0 and δLT of
the neutron have been extracted for the first time in a Q2 range from 0.1 to
0.9 GeV2. Since γ0 is sensitive to nucleon resonances and
δLT is insensitive to the Δ resonance, it is expected that the
pair of forward spin polarizabilities should provide benchmark tests of the
current understanding of the chiral dynamics of QCD. The new results on
δLT show significant disagreement with Chiral Perturbation Theory
calculations, while the data for γ0 at low Q2 are in good agreement
with a next-to-lead order Relativistic Baryon Chiral Perturbation theory
calculation. The data show good agreement with the phenomenological MAID model.Comment: 5 pages, 2 figures, corrected typo in author name, published in PR