A note on the possible bound D(⁎)D(⁎),B¯(⁎)B¯(⁎) and D(⁎)B¯(⁎) states

Abstract

Motivated by the recently observation of the tetraquark Tcc+ state, in this work I revisit the Heavy-Meson Effective Theory to perform a simplified field-theoretical study of possible deuteron-like D(⁎)D(⁎),B¯(⁎)B¯(⁎) and D(⁎)B¯(⁎) molecules. In particular, using the data from Tcc+ as input to fix the potential associated to the shallow-bound DD⁎ system with I(JP)=0(1+), the conditions for the formation of other loosely-bound states in the doubly charmed sector are analyzed. The other sectors are also discussed.