Nn. Achasov et Vv. Gubin, SEARCH FOR THE SCALAR A(0) AND F(0) MESONS IN THE REACTIONS E(-)-]GAMMA-PI(0)PI(0)(ETA)()E(), Physical review. D. Particles and fields, 56(7), 1997, pp. 4084-4097
It is shown that the reactions e(+)e(-) --> gamma pi(0) pi(0)(pi) give
a good chance for observing the scalar a(0) and f(0) mesons. In the p
hoton energy region less than 100 MeV the vector meson contributions e
(+)e(-) --> V-0 --> pi(0)V'(0) --> gamma pi(0) pi(0)(eta) are negligib
le in comparison with the scalar meson e(+)e(-) --> phi --> gamma f(0)
(a(0)) --> gamma pi(0) pi(0)(eta) for B(phi --> gamma(f(0) + sigma) --
> gamma pi pi are derived. The four-quark model, the model of the <K(K
)over bar> molecule, and the <a(s)over bar> model of scalar f(0) and a
(0) mesons are discussed.