Abstract
© 2014, The Author(s). Abstract: In a combined study of the decay spectra of τ−− KSπ−ντ and τ−− K−ηντ decays within a dispersive representation of the required form factors, we illustrate how the K*(1410) resonance parameters, defined through the pole position in the complex plane, can be extracted with improved precision as compared to previous studies. While we obtain a substantial improvement in the mass, the uncertainty in the width is only slightly reduced, with the findings MK*′ = 1304 ± 17 MeV and ΓK*′ = 171 ± 62 MeV. Further constraints on the width could result from updated analyses of the Kπ and/or Kη spectra using the full Belle-I data sample. Prospects for Belle-II are also discussed. As the K−π0 vector form factor enters the description of the decay τ−− K−ηντ, we are in a position to investigate isospin violations in its parameters like the form factor slopes. In this respect also making available the spectrum of the transition τ−→ K−π0ντ would be extremely useful, as it would allow to study those isospin violations with much higher precision.
Original language | English |
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Article number | 42 |
Journal | Journal of High Energy Physics |
Volume | 2014 |
Issue number | 9 |
DOIs | |
Publication status | Published - 1 Jan 2014 |
Keywords
- Phenomenological Models
- QCD Phenomenology