Beauty mesons in Nf=2+1+1+1 lattice QCD with exact chiral symmetry

Ting-Wai Chiu 2020 Physical Review D 102 034510 (2020)

We present the first study of Nf=2+1+1+1 lattice QCD with domain-wall quarks. The (b,c,s) quarks are physical, while the (u,d) quarks are heavier than their physical masses, with the pion mass ∼700 MeV. The gauge ensemble is generated by hybrid Monte Carlo simulation with the Wilson gauge action for the gluons, and the optimal domain-wall fermion action for the quarks. Using point-to-point quark propagators, we measure the time-correlation functions of quark-antiquark meson interpolators with quark contents b¯b, b¯c, b¯s, and c¯c, and obtain the masses of the low-lying mesons. They are in good agreement with the experimental values, plus some predictions which have not been observed in experiments. Moreover, we also determine the masses of (b,c,s) quarks.