Combined analysis of the decays τ − → K S π − ν τ and τ − → K − ην τ

• DOI: 10.1007/jhep09(2014)042
• Publication Date: 2014-09-10T00:47:45Z
• Authors: R. Escribano; S. González-Solís; M. Jamin; P. Roig
• Keywords: Position (finance); Representation

In a combined study of the decay spectra τ − K S π ν and ην decays within dispersive representation required form factors, we illustrate how *(1410) resonance parameters, defined through pole position in complex plane, can be extracted with improved precision as compared to previous studies. While obtain substantial improvement mass, uncertainty width is only slightly reduced, findings M K*′ = 1304 ± 17 MeV Γ 171 62 MeV. Further constraints on could result from updated analyses Kπ and/or Kη using full Belle-I data sample. Prospects for Belle-II are also discussed. As 0 vector factor enters description , investigate isospin violations its parameters like slopes. this respect making available spectrum transition → would extremely useful, it allow those much higher precision.