Study of the DK interaction with femtoscopic correlation functions

The DK interaction in isospin zero is known to be attractive to such an extent that a bound state can be generated, which can be associated with the mysterious Ds0∗(2317). In this work, we calculate the DK femtoscopic correlation function in the coupled-channel framework for different source sizes that can directly probe the strongly attractive DK interaction, which is otherwise inaccessible due to the unstable nature of D and K mesons, and therefore can help elucidate the nature of Ds0∗(2317). We further generalize the study of source size dependence to various interactions, ranging from repulsive, weakly attractive, moderately attractive, and strongly attractive, in a square-well model. We hope that our study can motivate future experimental measurements of the DK correlation function and other interactions relevant to the understanding of the nature of the many exotic hadrons discovered so far.