A Simple Model for Generalised Parton Distributions of the Pion

Details A Simple Model for Generalised Parton Distributions of the Pion A Simple Model for Generalised Parton Distributions of the Pion

2004-07-22

arxiv.org/abs/hep-ph/0407266v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Presented by J.P. Lansberg at 12th International Workshop on Deep Inelastic Scattering (DIS 2004), 14-18 April 2004, Strbske P

Scientific paper

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 (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.

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