Is the dibaryon system bound in a meson exchange model?

Sekihara, Takayasu; Kamiya, Yuki*; Hyodo, Tetsuo*

Recently, the HAL QCD simulation pointed out that the interaction is strongly attractive enough to generate a bound state with spin/parity . In this talk, we investigate the origin of the attraction of the interaction by constructing a meson exchange model. Between and , and scalar-isoscalar ("") mesons can be exchanged. The couplings between the meson and baryons are fixed by the effective Lagrangian based on flavor symmetry. For the "" exchange, on the other hand, we employ the correlated two meson exchange developed in the study of the nuclear force. We discuss whether the interaction is attractive or not and whether the attraction is strong enough to generate the bound state or not.