Triply heavy tetraquark spectroscopy

The masses of the ground states of all possible compositions of triply heavy tetraquarks are calculated on the basis of the relativistic quark model and the diquark--antidiquark picture of tetraquarks. Within the framework of the quasipotential approach, the relativistic potential of the diquark--antidiquark interaction is constructed, which takes into account the internal structure of the diquark and antidiquark, as well as all spin--dependent and spin--independent relativistic corrections. The calculated masses of tetraquarks are compared with the heavy+heavy--light meson pair decay thresholds and conclusions are drawn about the possibility of experimental observation of such states.