A hadron mass calculation is reported using two flavors of dynamical, staggered fermions with masses of ma=0.01, 0.015, 0.02, and 0.025 on a ${16}^3$×32 lattice. The masses of hadrons containing valence quarks with ma=0.004, 0.07, 0.1, 0.14, and 0.25 were also computed to study the limit ma→0 and the strange particle spectrum. For ma=0.01, the mass ratio ${\mathit{m}}_{\mathit{N}}$/${\mathit{m}}_{\mathrm{\rho }}$=1.527(11) is 25% larger than experiment while the results ${\mathit{f}}_{\mathrm{\pi }}$/${\mathit{m}}_{\mathrm{\rho }}$=0.14(1) and (${\mathit{m}}_{\mathit{K}}^2$-${\mathit{m}}_{\mathrm{\pi }}^2$)/(${\mathit{m}}_{\mathit{K}}^{\mathrm{*}}$-${\mathit{m}}_{\mathrm{\rho }}$)${\mathit{m}}_{\mathrm{\rho }}$=2.25(3) agree somewhat better.

• Received 10 April 1991

DOI:https://doi.org/10.1103/PhysRevLett.67.1062