A Model for the Off-forward Structure Functions of the Pion

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dc.creatorBissey, F.
dc.creatorCudell, J. R.
dc.creatorCugnon, J.
dc.creatorLansberg, J. P.
dc.creatorStassart, P.
dc.date2003-10-15
dc.date2004-03-05
dc.date.accessioned2026-07-07T11:09:27Z
dc.date.available2026-07-07T11:09:27Z
dc.descriptionWe extend our model for the pion, which we used previously to calculate its diagonal structure function, to the off-forward case. The imaginary part of the off-forward gamma* pi -> gamma* pi scattering amplitude is evaluated in the chiral limit (m_pi=0) and related to the twist-two and twist-three generalised parton distributions, H, H3, H3tilde. Non-perturbative effects, linked to the size of the pion and still preserving gauge invariance, are included. Remarkable new relations between H, H3 and H3tilde are obtained and discussed.
dc.description9 pages, 20 figures, LaTeX, uses ulg_ptf.cls (included); v2: Form factors dropped in favour of GPD's, comparison between Wandzura-Wilczek approximation and our relations added
dc.identifierhttps://arxiv.org/abs/hep-ph/0310184
dc.identifierhttp://arxiv.org/abs/hep-ph/0310184
dc.identifierPhys.Lett.B587:189-200,2004
dc.identifierdoi:10.1016/j.physletb.2004.03.023
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/190469
dc.subjectHigh Energy Physics - Phenomenology
dc.titleA Model for the Off-forward Structure Functions of the Pion
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