Speaker
Description
In the present talk, we present a molecular nature of the charmed strange $D_{s0}^*(2317)$ state. The $D_{s0}^*(2317)$ state has a mass approximately 40 MeV below the $D^0K^+$ threshold, and the upper limit of the width is known to be $3.8$ MeV. Its favorable spin-parity assignment is believed to be $J^P=0^+$, the parity conservation being assumed. Since $D_{s0}^*(2317)$ only decays into the isospin breaking process, the $\pi^0-\eta$ mixing for the $D_s\pi^0$ channel is taken into account in our calculation. We solve the coupled integral equations to obtain a fully off-mass shell $T$-matrix in the momentum space. The $u$-channel exchange amplitudes in $DK$ channels generate dynamically a $DK$ bound state, which can be identified as the $D_{s0}^*(2317)$ meson. We also discuss the uncertainty of the results with the coupling constants varied.
