New vistas of the meson structure in QCD from low to high energies

Abstract

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 ${\mu }^{+}$ distribution in the polarized $\mu$-pair-induced DY production employing various pion distribution amplitudes.

arXiv comment6 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

References in corpus (26)

• Measurements of the Meson-Photon Transition Form Factors of Light Pseudoscalar Mesons at Large Momentum Transfer
• Analytic Model for the QCD Running Coupling with Universal ${\bar{\alpha }}_s(0)$ Value
• Measurement of the Charged Pion Electromagnetic Form Factor
• QCD-based pion distribution amplitudes confronting experimental data
• Moments of pseudoscalar meson distribution amplitudes from the lattice
• Pion and photon light-cone wave functions from the instanton vacuum
• The $\pi \gamma$ transition form factor and the pion wave function
• Pion form factor in QCD: From nonlocal condensates to NLO analytic perturbation theory
• Unbiased analysis of CLEO data at NLO and pion distribution amplitude
• Perturbative Effects in the Form Factor γγ^*\to πand Extraction of the Pion Wave Function from CLEO Data
• Analytic coupling and Sudakov effects in exclusive processes: pion and ${\gamma }^{\ast }\gamma \to {\pi }^0$ form factors
• CLEO and E791 data: A smoking gun for the pion distribution amplitude?
• Next-to-next-to-leading order prediction for the photon-to-pion transition form factor
• Pion light cone wave function in the non-local NJL model
• QCD Analytic Perturbation Theory. From integer powers to any power of the running coupling
• Pion Form Factor in Improved Holographic QCD Backgrounds
• Fractional Analytic Perturbation Theory in Minkowski space and application to Higgs boson decay into a b\bar{b} pair
• Pion form factors with improved infrared factorization
• |V_ub| and Constraints on the Leading-Twist Pion Distribution Amplitude from B->pi l nu
• Isospin amplitudes and CP violation in $(B\to K\pi )$ decays
• Tagging the pion quark structure in QCD
• Analyticity and power corrections in hard-scattering hadronic functions
• Analyticity properties of three-point functions in QCD beyond leading order
• Higher twist distribution amplitudes of the pion and electromagnetic form factor $F_{\pi }(Q^2)$
• Lattice Results for Vector Meson Couplings and Parton Distribution Amplitudes
• Polarized and unpolarized $\mu$-pair meson-induced Drell--Yan production and the pion distribution amplitude

Cited by in corpus (13)

• Measurement of the gamma gamma* --> pi0 transition form factor
• Transition form factors of the pion in light-cone QCD sum rules with next-to-next-to-leading order contributions
• Two-loop Corrections to the B to pi Form Factor from QCD Sum Rules on the Light-Cone and |V(ub)|
• Pion-photon transition---the new QCD frontier
• Pion transition form factor in k_T factorization
• Systematic estimation of theoretical uncertainties in the calculation of the pion-photon transition form factor using light-cone sum rules
• QCD sum rules with nonlocal condensates and the spacelike pion form factor
• Pion transition form factor at the two-loop level vis-à-vis experimental data
• Endpoint behavior of the pion distribution amplitude in QCD sum rules with nonlocal condensates
• Chimera distribution amplitudes for the pion and the longitudinally polarized $\rho$-meson
• Pion-photon transition form factor using light-cone sum rules: theoretical results, expectations, and a global-data fit
• Pion-Photon Transition Form Factor and Pion Distribution Amplitude in QCD: Facing the Enigmatic Behavior of the BaBar Data
• Pion Form Factor in the NLC QCD SR approach