Strange resonance poles from d-i-eq1"> \(K\pi \) scattering below 1.8 GeV

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• 作者：J. R. Pelaez ; A. Rodas ; J. Ruiz de Elvira
• 刊名：The European Physical Journal C
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：77
• 期：2
• 全文大小：1290KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Elementary Particles, Quantum Field Theory; Nuclear Physics, Heavy Ions, Hadrons; Quantum Field Theories, String Theory; Measurement Science and Instrumentation; Astronomy, Astrophysics and Cosmology;
• 出版者：Springer Berlin Heidelberg
• ISSN：1434-6052
• 卷排序：77

文摘

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 \(\kappa \)-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 \(K\pi \) 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.