Study light scalar meson property from heavy meson decays

Abstract

In the SU(3) symmetry limit, the ratio R ≡ B(D+→ f0l+ν)+B(D+→σ l+ν )/B(D+→a00 l+ν ) is equal to 1 if the scalar mesons are q̄q states, while it is 3 if these mesons are tentraquark states. This ratio provides a model-independent way to distinguish the descriptions for light scalar mesons. It also applies to the B -→ Sl-ν̄ and B̄0 → JΨ(ηc)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+ ν, B-→ Sl- ν̄ and B̄0rarr; Jψ(ηc)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. © 2010 American Institute of Physics.