RT Journal Article
T1 Strange resonance poles from K π scattering below 1.8 GeV
A1 Peláez Sagredo, José Ramón
A1 Rodas Bilbao, Arkaitz
A1 Ruiz De Elvira Carrascal, Jacobo
AB 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 ĸ- meson, nowadays known as K(_1)(*)   (800), the scalar K(_1)(*) (1430), the K*(892) and K(_1)(*) (1410) vectors, the spin-two K(_1)(*) (1430) as well as the spin-three K(_1)(*) (1780). The parameters will be determined from the pole associated to each resonance by means of an analytic continuation of the Kπ 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 Pade approximants, thus avoiding a particular model for the pole parameterization. We also pay particular attention to the evaluation of uncertainties.
PB Springer
SN 1434-6044
YR 2017
FD 2017-02-11
LK https://hdl.handle.net/20.500.14352/17847
UL https://hdl.handle.net/20.500.14352/17847
LA eng
NO © SpringerJRP and AR are supported by the Spanish Project FPA2014-53375-C2-2 and the Spanish Excellence network HADRONet FIS2014-57026-REDT. The work of JRE was supported by the DFG (SFB/TR 16, “Subnuclear Structure of Matter”) and theSwiss National Science Foundation.
NO Ministerio de Ciencia e Innovación (MICINN)
NO Swiss National Science Foundation
DS Docta Complutense
RD 10 abr 2025