Strange and charmed hadron spectroscopy on a 323 x 48 lattice at β = 6.3 Original Research Article

The results of meson and baryon spectroscopy composed of charm and strange quarks are reported by the use of quenched Wilson fermions on a 323 x 48 lattice at β = 6.3. Ground state hadrons composed of two or three quarks with different hopping parameters, in a region κ = 0.13 to 0.15, are measured. It is found that their masses are well described by a quadratic polynomial in terms of multi-1/κ variables in this region. Adjusting vector meson mass ratios between (ss), (sc) and (cc), the hopping parameters of strange quark and charm quark are determined to be κs = 0.14999(22) and κc = 0.13548(82) without chiral extrapolation. Masses of not yet observed ssc, scc and ccc baryons in GeV are estimated to be 2.778 ± 0.0]6 (ssc), 3.858 ± 0.015 (scc) for (12)+ and 2.813 ± 0.167 (ssc), 3.869 ± 0.055 (scc) 4.880 ± 0.017 (ccc) for (3/2)+. As for the meson spin splitting structure, the quenched Wilson spectrum is more degenerate in comparison with real hadrons, as already pointed out by many authors.