Strange resonance poles from Kπ scattering below 1.8 GeV

Pelaez, J. R.; Rodas, A.; Ruiz de Elvira Carrascal, Jacobo (2017). Strange resonance poles from Kπ scattering below 1.8 GeV. European physical journal. C - particles and fields, 77(2) EDP Sciences 10.1140/epjc/s10052-017-4668-1

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n 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 κ -meson, nowadays known as K 0∗ (800), the scalar K 0∗ (1430), the K ∗ (892) and K 1∗ (1410) vectors, the spin-two K 2∗ (1430) as well as the spin-three K 3∗ (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 Padé approxi- mants, thus avoiding a particular model for the pole parame- terization. We also pay particular attention to the evaluation of uncertainties.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Ruiz de Elvira Carrascal, Jacobo

Subjects:

500 Science > 530 Physics

ISSN:

1434-6044

Publisher:

EDP Sciences

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

30 Oct 2017 10:42

Last Modified:

05 Nov 2017 02:24

Publisher DOI:

10.1140/epjc/s10052-017-4668-1

ArXiv ID:

1612.07966

BORIS DOI:

10.7892/boris.106401

URI:

https://boris.unibe.ch/id/eprint/106401

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