2004/07/22 by J. P. Lansberg, F. Bissey, Lansberg, J. P. +7
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0407266
Presented by J.P. Lansberg at 12th International Workshop on Deep Inelastic Scattering (DIS 2004), 14-18 April 2004, Strbske Pleso, Slovakia, 5 pages, 4 figures, LaTeX, uses dis04.cls (included)
arxiv created 2004/07/22 · arxiv updated 2009/12/01
We present here an extension of 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 (mpi=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.