Progress Report on Computing Excited-State Hadron Masses in Lattice QCD
  Our progress in computing the spectrum of excited baryons and mesons in lattice QCD is described. Sets of spatially-extended hadron operators with a variety of different momenta are used. A new method of stochastically estimating the low-lying effects of quark propagation is utilized which allows reliable determinations of temporal correlations of both single-hadron and multi-hadron operators. The method is tested on the isoscalar mesons in the scalar, pseudoscalar, and vector channels, and on the two-pion system of total isospin I=0,1,2. 
C. Morningstar, A. Bell, J. Bulava, J. Foley, K.J. Juge, D. Lenkner,   C.H. Wong
hep-lat nucl-th