We present results of a lattice calculation of heavy-light tetraquark states with charm & bottom quarks in the heavy sector and up & down quarks in light sector while the strange quark appears interchangeably in both sectors. The calculation employs the highly improved staggered quark action (HISQ) as adopted by the MILC collaboration in the sea sector and overlap action in the valence sector. The charm and bottom quark masses are tuned to their physical values with a relativistic action for the charm quark while an improved non-relativistic action is used for the bottom quark. We present a study of quark mass dependence of the tetraquark ground state on a range of light quark masses on three lattice spacings.

Hadron Spectroscopy and Interactions