https://doi.org/10.1140/epjc/s10052-017-4668-1
Regular Article - Theoretical Physics
Strange resonance poles from 
scattering below 1.8 GeV
1
Departamento de Física Teórica II, Universidad Complutense de Madrid, 28040, Madrid, Spain
2
Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) and Bethe Center for Theoretical Physics, Universität Bonn, 53115, Bonn, Germany
3
Albert Einstein Center for Fundamental Physics, Institute for Theoretical Physics, University of Bern, Sidlerstrasse 5, 3012, Bern, Switzerland
* e-mail: jrpelaez@fis.ucm.es
Received:
26
December
2016
Accepted:
30
January
2017
Published online:
11
February
2017
In this work we present a determination of the mass, width, and coupling of the resonances that appear in kaon–pion scattering below 1.8 GeV. These are: the much debated scalar 
-meson, nowadays known as 
, the scalar 
, the 
and 
vectors, the spin-two 
as well as the spin-three 
. The parameters will be determined from the pole associated to each resonance by means of an analytic continuation of the scattering amplitudes obtained in a recent and precise data analysis constrained with dispersion relations, which were not well satisfied in previous analyses. This analytic continuation will be performed by means of Padé approximants, thus avoiding a particular model for the pole parameterization. We also pay particular attention to the evaluation of uncertainties.
© The Author(s), 2017
