Decay width of the d⁎(2380)→NNπ process in a chiral constituent quark model

The width of three-body single-pion decay process d⁎→NNπ0,± is calculated by using the d⁎ wave function obtained from our chiral SU(3) constituent quark model calculation. The effect of the dynamical structure on the width of d⁎ is taken into account in both the single ΔΔ channel and coupled ΔΔ+CC two-channel approximations. Our numerical result shows that in the coupled-channel approximation, namely, the hidden-color configuration being...