Third Spectroscopy with a hint of superstrings

New regularities found in the pseudoscalar meson octet are reported. They invite to reconsider models where elementary fermions and composite QCD open strings can be grouped in common supermultiplets. It is proven that, with fermions having the standard model charges, such grouping needs at least three families.Comment: 6 pages, some typos correcte

Regularities in electromagnetic decay widths

We revisit Sakurai's remark on the regularities of lepton-pair widths for mesons, extending the panorama to radiative $X \to \gamma \gamma$ and total decays. The regularities persist, and somehow surprisingly some of them seem to relate with Fermi's constant -or $Z^0$-.Comment: 6 pages, 2 figure