New vistas of the meson structure in QCD from low to high energies
Abstract
Description
This talk presents issues pertaining to the quark structure of the pion within QCD, both from the theoretical and from the experimental point of view. We review and discuss the pion-photon transition form factor and the pion's electromagnetic form factor vs. corresponding experimental data from the CLEO Collaboration and the JLab. We also examine the extent to which recent high-precision lattice computations of the second moment of the pion's distribution amplitude conform with theoretical models. Finally, we include predictions for the azimuthal asymmetry of the $μ^+$ distribution in the polarized $μ$-pair-induced DY production employing various pion distribution amplitudes.
6 pages, 7 figures, 2 tables. Talk presented at International Workshop on e^+e^- collisions from Phi to Psi, Frascati, Italy, 7-10 April 2008. V2 is an exclusive HEP version which includes predictions from AdS/QCD. V3: typo in title corrected
6 pages, 7 figures, 2 tables. Talk presented at International Workshop on e^+e^- collisions from Phi to Psi, Frascati, Italy, 7-10 April 2008. V2 is an exclusive HEP version which includes predictions from AdS/QCD. V3: typo in title corrected