Abstract
Motivated by the recent experimental observations of the exotic narrow doubly charmed tetraquark \(T_{cc}(3875)^{+}\) , the spectroscopy of such tetraquarks is investigated within the relativistic quark model, based on the quasipotential approach and QCD. Tetraquark is considered as a diquark–antidiquark bound state. Relativistic quasipotential includes all relativistic corrections and accounts for the finite size of a diquark. Masses of doubly charmed tetraquarks are calculated and then compared with available experimental data and the strong fall-apart decay thresholds into a pair of mesons. The states that could be observed as narrow resonances in other decay modes are identified.
