Tests for the asymptotic behaviour of the gamma^* --> gamma pi^0 form factor

Abstract

The gamma^* --> gamma pi^0 transition measured at different photon virtualities already provides us with a clean test for the behaviour of the pi^0 gamma^* gamma off-shell axial anomaly at large time-like squared momenta. It also allows reliable predictions for the branching ratio of heavy quarkonium decays into omega pi^0.

Latex, 7 pages + 1 .ps figure, comments on the Brodsky-Lepage limit and 5 new references added

Cited by in corpus (12)

• The VV'P form factors in resonance chiral theory and the pi-eta-eta' light-by-light contribution to the muon g-2
• Phases and Amplitudes in Inclusive $\Psi$ and ${\Psi }^{\prime }$ Decays
• Measurement of the final states $\omega {\pi }^0$, $\rho \eta$, and $\rho {\eta }^{{}^{\prime }}$ from $\psip$ electromagnetic decays and $\ee$ annihilations
• Measuring psi(3770) --> rho pi in e+e- experiment
• Study of exclusive processes e^+ e^- \to VP
• The Form Factors of omega pi0 and pi+ pi- at psi(2S)
• Observation of the Exclusive Reaction e+e- -> phi eta at sqrt{s}=10.58 GeV
• Measurement of $e^{+}{e}^{-}\to \omega {\pi }^0$, $K^{\ast }(892)\bar{K}$ and $K_2^{\ast }(1430)\bar{K}$ at $\sqrt{s}$ near 10.6 GeV
• Exclusive processes $e^{+}{e}^{-}\to VP$ in $k_T$ factorization
• Measurement of cross sections of exclusive $e^{+}{e}^{-}\to VP$ processes at $\sqrt{s}=10.58$ GeV
• Survival before annihilation in Psi-prime decays
• The continuum and interference effect in $e^{+}{e}^{-}\to D^0{\bar{D}}^0,D^{+}{D}^{-}$ processes