Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-12-17
PoS LC2008:017,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
To appear in the proceedings of Light Cone 2008: Relativistic Nuclear and Particle Physics (LC2008), Mulhouse, France, 7-11 Ju
Scientific paper
The exclusive production of \pi\pi and \pi\rho in hard \gamma^{\star}\gamma scattering in the forward kinematical region where the virtual photon is highly off-shell are studied through the \gamma\to\pi^- Transition Distribution Amplitudes. The calculation is based on a covariant Bethe-Salpeter approach, applied to the Nambu - Jona-Lasinio model, for the determination of the pion bound state. In particular it is shown that the pion pole contribution produces a large enhancement of the differential cross section for the pion pair production with respect to previous estimates.
Courtoy A.
Noguera Santiago
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