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26 April 2024
 
  » arxiv » hep-ph/0207230

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Polynomiality of unpolarized off-forward distribution functions and the D-term in the chiral quark-soliton model
P. Schweitzer ; S. Boffi ; M. Radici ;
Date 18 Jul 2002
Journal Phys.Rev. D66 (2002) 114004
Subject hep-ph
AffiliationPavia U.), S. Boffi, M. Radici (Pavia U. & INFN, Pavia
AbstractMellin 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.
Source arXiv, hep-ph/0207230
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