  The spectrum of the doubly heavy baryons is estimated with respect to the new
observation from the LHCb collaboration [Aaij:2017ueg] by using the chiral
partner structure and heavy quark spin-flavor symmetry. The effects of heavy
quark flavor symmetry breaking and light quark flavor symmetry are considered.
The mass splitting of doubly heavy baryons with the same spin but opposite
parity arises from the generalized Goldberger-Treiman relation. The
intermultiplet one-pion transition and intramultiplet radiative transitions are
also be estimated.
