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Progress Report on Computing Excited-State Hadron Masses in Lattice QCD

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arxiv 1103.2783 v1 pith:WL2WH55R submitted 2011-03-14 hep-lat nucl-th

Progress Report on Computing Excited-State Hadron Masses in Lattice QCD

C. Morningstar , A. Bell , J. Bulava , J. Foley , K.J. Juge , D. Lenkner , C.H. Wong This is my paper
classification hep-lat nucl-th
keywords computinghadronlatticemesonsmethodoperatorsprogressallows
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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