出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：In the SU(3) symmetry limit, the ratio R ´ B(D+!f0l+n)+B(D+!s l+n ) B(D+!a00 l+n ) is equal to 1 if the scalar mesons are ¯ qq states, while it is 3 if these mesons are tetra-quark states. This ratio provides a model-independent way to distinguish the descriptions for light scalar mesons . It also applies to the B¡ ! Sl¡ ¯ n and ¯B0 ! J=y(hc)S decays. The SU(3) symmetry breaking effect is found to be under control, which will not spoil our method. The branching fractions of the D+ !Sl+n , B¡!Sl¡ ¯ n and ¯B0!J=y(hc)S decays roughly have the order 10¡4, 10¡5 and 10¡6, respectively. The B factory experiments and ongoing BEPC-II experiments are able to measure these channels and accordingly to provide the detailed information of the scalar meson inner structure.
