Existence of sigma(600)/kappa(900) and Possible Classification of Chiral Scalar Nonet
| dc.creator | Ishida, Muneyuki | |
| dc.date | 1999-05-06 | |
| dc.date.accessioned | 2026-07-07T04:07:01Z | |
| dc.date.available | 2026-07-07T04:07:01Z | |
| dc.description | Recently, by reanalyzing the phase shift data of I=0 pipi$ and of I=1/2 Kpi scatterings, we showed the evidences for existence of light scalar mesons, sigma(600) and kappa(900), respectively, which had been sought but missing for a long time. The sigma(600) and kappa(900) together with the established resonances, a_0(980) and f_0(980), are shown to be consistently classified as the members of a single scalar sigma-nonet, appearing in the SU(3) linear sigma model. Especially the mass value of the iso-singlet flavor-octet member satisfies, together with those of kappa(900) and a_0(980), the Gell-Mann Okubo mass formula. The repulsive background phase shift delta_{BG}, which was essential to lead the sigma/kappa-existence in our phase shift analyses, is also shown to be quantitatively describable in the framework of linear sigma model. Thus, the origin of delta_{BG} is reduced to the ``compensating lambda phi^4-interaction," necessary from the viewpoint of chiral symmetry. | |
| dc.description | 6 pages, 1 eps figure, uses elsart.sty proceedings of Int. Conf. e+e-collisions from phi to J/psi, Novosibirsk, March 1-5, 1999 | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9905259 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9905259 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/48993 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Existence of sigma(600)/kappa(900) and Possible Classification of Chiral Scalar Nonet | |
| dc.type | text |