Beauty mesons in lattice QCD with exact chiral symmetry

We present the first study of treating b, c, and s quarks as Dirac fermions in lattice QCD with exact chiral symmetry. For 100 gauge configurations generated with single-plaquette action at β = 7.2 on the 323 × 60 lattice, we compute point-to-point quark propagators for 33 quark masses in the range 0.01 ≤ mqa ≤ 0.85, and measure the time-correlation function of (pseudo-)scalar, (pseudo-)vector, and tensor mesons, for symmetric and asymmetric quark masses respectively. The lowest-lying mass spectra of mesons with quark contents bb̄, cb̄, sb̄, and cc̄ are determined, together with the pseudoscalar decay constants. Our results are sumarized in Tables 1-5. Furthermore, we also determine the b and c quark masses, mMS b (mb) = 4.65(5) GeV, mMS c (mc) = 1.16(4) GeV. PACS numbers: 11.15.Ha, 11.30.Rd, 12.38.Gc, 14.40.Lb, 14.40.Nd