decays using effective field theory*

The LHCb collaboration recently discovered a doubly charm tetraquark, T_cc⁺.  We study its strong and electromagnetic decays in a molecular interpretation using a nonrelativistic effective field theory.  This requires solving a coupled channel problem to account for both the D^*0D⁺ and the D^*+D⁰ channels.  We also compute differential spectra as a function of the invariant mass of the final state meson pair.  These results are in good agreement with the experimental analysis by LHCb.  We discuss the effect of other shallow bound states of two pseudoscalar charm mesons on the decay of T_cc⁺, as well as next-leading-order contributions from pion exchange and final state rescattering.