Determination of the lightest strange resonance K-0*(700) or kappa, from a dispersive data analysis
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 fi...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/6268 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/6268 |
| Access Level: | acceso abierto |
| Palabra clave: | 51-73 Scattering cross section Pi elastic scattering Equation analysis K scattering Roy Lattice Mesons. Física-Modelos matemáticos Física matemática |
| Sumario: | 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. |
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