A study of the resonances K0*(8OO) and K0*(1430). (August 2016)

• Record Type: Journal Article
• Authors: Sołtysiak, Milena; Wolkanowski, Thomas; Giacosa, Francesco
• Is Part Of: Journal of physics. Volume 742(2016)
• Publication Date: 2016-08
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/742/1/012014
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: We study the scalar kaonic states K 0 * (800) and K 0 * (1430) by using a relativistic QFT Lagrangian in which only a single kaonic field corresponding to the well-established scalar state K 0 * (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 K 0 * (1430), and 0.746 ± 0.019 — i (262 ± 0.014) GeV, which is an additional companion pole related to K 0 * (800). As a further investigation for increasing Nc confirms, K 0 * (800) emerges as a dynamically generated four-quark object as a consequence of pion-kaon loops.