Effective field theory for the doubly charmed tetraquark

I will discuss an effective field theory for the doubly charmed tetraquark T_cc(3875)⁺ that was discovered by the LHCb collaboration in July 2021. The power counting in this effective field theory (EFT) is based on the fact that the energy of T_cc(3875)⁺ is very close to the D^*+D⁰ threshold, and its decay width is very narrow due to the D⁰D⁰π⁺ phase space suppression near the threshold. I use the EFT to describe the three-body decay rate of the doubly charmed tetraquark.