Polynomiality of unpolarized off-forward distribution functions and the   D-term in the chiral quark-soliton model
  Mellin moments of off-forward distribution functions are even polynomials of the skewedness parameter. This constraint, called polynomiality property, follows from Lorentz- and time-reversal invariance. We prove that the unpolarized off-forward distribution functions in the chiral quark-soliton model satisfy the polynomiality property. The proof is an important contribution to the demonstration that the description of off-forward distribution functions in the model is consistent. As a byproduct of the proof we derive explicit model expressions for moments of the D-term and compute the first coefficient in the Gegenbauer expansion for this term. 
P. Schweitzer (Pavia U.), S. Boffi, M. Radici (Pavia U. & INFN, Pavia)