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Peláez Sagredo, José Ramón and Rodas, A.
(2020)
*Determination of the lightest strange resonance K-0*(700) or kappa, from a dispersive data analysis.*
Physical review letters, 124
(17).
ISSN 0031-9007

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.124.172001

## Abstract

In this work we present a precise and model-independent dispersive determination from data of the existence and parameters of the lightest strange resonance kappa/K-0*(700). We use both subtracted and unsubtracted partial-wave hyperbolic and fixed-t dispersion relations as constraints on combined fits to pi K -> pi K and pi pi -> K (K) over bar data. We then use the hyperbolic equations for the analytic continuation of the isospin I = 1/2 scalar partial wave to the complex plane, in order to determine the kappa/K-0*(700) and K* (892) associated pole parameters and residues.

Item Type: | Article |
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Additional Information: | © 2020 American Physical Society. |

Uncontrolled Keywords: | Scattering cross section; Pi elastic scattering; Equation analysis; K scattering; Roy; Lattice; Mesons. |

Subjects: | Sciences > Physics > Physics-Mathematical models Sciences > Physics > Mathematical physics |

ID Code: | 60596 |

Deposited On: | 21 May 2020 17:01 |

Last Modified: | 22 May 2020 07:06 |

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