Existence of σ(600)/κ(900)-Particle and New Chiral Scalar Nonet ``Chiralons''

Details Existence of σ(600)/κ(900)-Particle and New Chiral Scalar Nonet ``Chiralons'' Existence of σ(600)/κ(900)-Particle and New Chiral Scalar Nonet ``Chiralons''

1997-12-02

arxiv.org/abs/hep-ph/9712231v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk at HADRON'97, the 7th int. conf. on hadron spectroscopy, BNL, August 1997. 4 pages with 1 eps figure

Scientific paper

10.1016/S0375-9474(97)00678-7

The \sigma(600) and \kappa(900), observed in the phase shift analyses, satisfy rather well the mass and width relation predicted by the SU(3)LsM and the SU(3)LsM with the vector and axial-vector meson nonets, and deserve to be the members of scalar \sigma-nonet, together with the observed resonances a_0(980) and f_0(980), as a chiral partner of pseudoscalar \pi-nonet. In the phase shift analyses an introduction of repulsive background phase \delta_{BG} is essential, whose origin has a close connection to the \lambda\phi^4 interaction in LsM. It is argued that the members of this \sigma-nonet, "Chiralons", have different properties and should be discriminated from the conventional ^3P_0-qqbar-scalar nonet.

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