Possible Classification of the Chiral Scalar sigma-Nonet

Details Possible Classification of the Chiral Scalar sigma-Nonet Possible Classification of the Chiral Scalar sigma-Nonet

1999-02-07

arxiv.org/abs/hep-ph/9902260v1

Prog.Theor.Phys.101:661-669,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 1 Postscript figure, uses ptptex.sty

Scientific paper

10.1143/PTP.101.661

We recently observed the iso-singlet scalar sigma(600)-particle and the iso-doublet scalar kappa(900)-particle, through the re-analyses of pi pi- and K pi-scattering phase shifts, respectively. First, assuming the two iso-singlet states, the sigma(600) and the established f0(980), being the ideal mixing states n n and s s, 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 kappa(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 sigma-nonet, together with the pseudo-scalar pi-nonet, realizes the linear representation of SU(3) chiral symmetry.

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