Masses and axial currents of the doubly charmed baryons

Abstract

The chiral dynamics of the doubly heavy baryons is solely governed by the light quark. In this paper, we have derived the chiral corrections to the mass of the doubly heavy baryons up to N3LO. The mass splitting of Ξcc and Ωcc at the N2LO depends on one unknown low energy constant c7. By fitting the lattice masses of Ξccð3520Þ, we estimate the mass of Ωcc to be around 3.726 GeV. Moreover, we have also performed a systematical analysis of the chiral corrections to the axial currents and axial charges of the doubly heavy baryons. The chiral structure and analytical expressions will be very useful to the chiral extrapolations of the future lattice QCD simulations of the doubly heavy baryons.