A study of the resonances K 0*(8OO) and K 0*(1430)

FAIRNESS 2016

Soltysiak, Milena^1 ; Wolkanowski, Thomas^2 ; Giacosa, Francesco^1,2

Institute of Physics, Jan Kochanowski University, Kielce

PL-25406, Poland^1

Institute for Theoretical Physics, Goethe University, Frankfurt am Main

D-60438, Germany^2

关键词: Complex planes;    Interaction term;    Kaonic state;    Lagrangian;    Quark-antiquark state;    Scalar spectral functions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/742/1/012014/pdf
DOI  :  10.1088/1742-6596/742/1/012014

来源: IOP

【 摘 要 】

We study the scalar kaonic states K0∗(800) and K0∗(1430) by using a relativistic QFT Lagrangian in which only a single kaonic field corresponding to the well-established scalar state K0∗(1430) is considered and in which both derivative and non-derivative interaction terms are taken into account. Even if the scalar spectral function shows a unique peak close to 1.4 GeV, we find two poles in the complex plane: 1.413 ± 0.002 - i(0.127 ± 0.003) GeV, which is related to the seed quark-antiquark state K0∗ (1430), and 0.746 ± 0.019 - i(262 ± 0.014) GeV, which is an additional companion pole related to K0∗(800). As a further investigation for increasing Ncconfirms, K0∗(800) emerges as a dynamically generated four-quark object as a consequence of pion-kaon loops.