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Prog. Theor. Phys. Vol. 101 No. 3 (1999) pp. 661-669

[ Full Text PDF : FREE ACCESS (149K) ]

Possible Classification of the Chiral Scalar σ-Nonet

Muneyuki Ishida

Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan

(Received July 22, 1998)

Abstract:

We recently observed the iso-singlet scalar σ(600)-particle and the iso-doublet scalar κ(900)-particle, through the re-analyses of ππ- and Kπ-scattering phase shifts, respectively. First, assuming the two iso-singlet states, the σ(600) and the established f0(980), being the ideal mixing states n\barn and s\bars, respectively, of a single scalar nonet, it is pointed out that the mass value of the iso-singlet flavor-octet state, obtained from the orthogonal transformation, satisfies, together with the κ(900) and the iso-triplet scalar a0(980)-particle, the Gell-Mann Okubo mass-formula. Furthermore, it is argued that, by investigating their properties of masses and widths, this scalar σ-nonet, together with the pseudo-scalar π-nonet, realizes the linear representation of SU(3) chiral symmetry.


URL : http://ptp.ipap.jp/link?PTP/101/661/
DOI : 10.1143/PTP.101.661

[ Full Text PDF : FREE ACCESS (149K) ] Citation:

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