The pion electromagnetic form factor has been calculated for the first time from solutions of Bethe-Salpeter equation, obtained directly in Minkowski space by using Nakanishi integral representation amplitude. one-gluon exchange kernel contains as inputs quark and gluon masses, well a scale parameter featuring extended quark-gluon vertex. range variability these parameters is suggested lattice ...

We reexamine and extend a recent analysis which showed that the ρ−ω mixing amplitude cannot be unambiguously extracted from the pion electromagnetic form-factor in a model independent way. In particular, we focus on the argument that the extraction is sensitive to the presence of any intrinsic ω I → ππ coupling. Our extended analysis confirms the original conclusion, with only minor, quantitati...

Results from the KTeV experiment at Fermilab using Ξ hyperons are presented, especially the first form-factor (FF) measurement from its semi-leptonic decay. This decay, which is an important test of the Standard Model, was observed for the first time using the 1997 KTeV experiment. We also report on the analysis of a large samples of Ξ weak radiative decays, and a search for the decay of a ligh...