SEARCH FOR THE SCALAR A(0) AND F(0) MESONS IN THE REACTIONS E(-)-]GAMMA-PI(0)PI(0)(ETA)()E()

Citation
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
Citations number
52
Categorie Soggetti
Physics, Particles & Fields
ISSN journal
05562821
Volume
56
Issue
7
Year of publication
1997
Pages
4084 - 4097
Database
ISI
SICI code
0556-2821(1997)56:7<4084:SFTSAA>2.0.ZU;2-K
Abstract
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.