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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 | Affiliation: | Pavia U.), S. Boffi, M. Radici (Pavia U. & INFN, Pavia | Abstract: | 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. | Source: | arXiv, hep-ph/0207230 | Services: | Forum | Review | PDF | Favorites |
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