ar X iv : h ep - p h / 98 03 29 2 v 2 1 1 M ar 1 99 8 NATURE OF THE SCALAR a 0 ( 980 ) AND f 0 ( 980 ) - MESONS

ar X iv : h ep - p h / 98 03 29 2 v 1 1 0 M ar 1 99 8 NATURE OF THE SCALAR a 0 ( 980 ) AND f 0 ( 980 ) - MESONS

It is presented a critical consideration of all unusual properties of the scalar a 0 (980) and f 0 (980)-mesons in the four-quark, two-quark and molecular models. The arguments are adduced that the four-quark model is more preferable. It is discussed the complex of experiments that could finally resolve this issue.

ar X iv : h ep - p h / 98 03 29 2 v 3 2 8 O ct 1 99 8 NATURE OF THE SCALAR a 0 ( 980 ) AND f 0 ( 980 ) - MESONS

It is presented a critical consideration of all unusual properties of the scalar a 0 (980) and f 0 (980)-mesons in the four-quark, two-quark and molecular models. The arguments are adduced that the four-quark model is more preferable. It is discussed the complex of experiments that could finally resolve this issue.

ar X iv : h ep - p h / 04 10 05 1 v 1 4 O ct 2 00 4 Problem of Light Scalar Mesons ∗

The following topics are considered. 1. Confinement, chiral dynamics and light scalar mesons. 2. φ-meson radiative decays about nature of light scalar resonances. Arguments in favor of the four-quark model of the a 0 (980) and f 0 (980) mesons are given. To discuss actually the nature of the putative nonet of the light scalar mesons: the red putative f 0 (600) (or σ(600)) and κ(700−900) mesons ...

ar X iv : h ep - p h / 02 03 04 2 v 2 4 A pr 2 00 2 Once more on mixing of the a 0 ( 980 ) and f 0 ( 980 ) mesons

ar X iv : h ep - p h / 98 03 21 4 v 1 2 M ar 1 99 8 THE φ → γK

The branching ratio of the φ meson to γK 0 ¯ K 0 is calculated to be 5 × 10 −8 in a scheme which takes into account the different isospin channels involved, I = 0, 1 with the resonant, f 0 (980), a 0 (980), and non resonant contributions. The study of the process φ → γK 0 ¯ K 0 is an interesting subject since it provides a background to the reaction φ → K 0 ¯ K 0. This latter process has been p...