Doubly heavy baryons in Born-Oppenheimer EFT

We report on the recent progress computation of doubly heavy baryon spectrum in effective field theory. The theory is built upon heavy-quark mass and adiabatic expansions. potentials can be expressed as NRQCD Wilson loops with operator insertions. These are nonperturbative objects so far only one corresponding to static potential has been computed lattice QCD. review proposal for a parametrization based an interpolation between short- long-distance regimes. description obtained newly proposed Effective String Theory which coincides previous ones pure gluodynamics but it extended contain fermion field. show hyperfine contributions using these parametrizations potentials.