The 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 work, We have derived the chiral corrections to the mass of the doubly heavy baryons up to N${}^3$LO. The mass splitting of ${\Xi }_{cc}$ and ${\Omega }_{cc}$ at the N${}^2$LO depends on one unknown low energy constant $c_7$. With the experimental mass of ${\Xi }_{cc}(3520)$ as the input, we estimate the mass of ${\Omega }_{cc}$ to be around 3.678 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.

arXiv comment10 pages, 2 tables, 3 figure. Accepted by Phys. Rev. D

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