τ→KSπ-ντ and τ→K-ηντ decays: A combined analysis

The decay spectra of τ-→KSπ-ντ and τ-→K-ηντ decays are studied in a combined analysis using a dispersive representation of the required vector and scalar form factors. The K*(1410) resonance parameters are extracted with improved precision as compared to previous studies, with the findings MK*′=1 304±17 MeV and ΓK*′=171±62 MeV. Isospin violations in the form factor slopes are investigated as the K-π0 vector form factor enters the description of the decay τ-→K-ηντ. In this respect, the spectrum of the transition τ-→K-π0ντ would be extremely useful.