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We discuss in detail the extraction of hadronic mixing strengths from latticestudies. We apply this to the mixing of a scalar glueball and a scalar meson inthe quenched approximation. We also measure correlations appropriate forflavour-singlet scalar mesons using dynamical quark configurations from UKQCD.This enables us to compare the results from the quenched study of the mixingwith the direct determination of the mixed spectrum. Improved methods ofevaluating the disconnected quark diagrams are also presented.Comment: 23 pages, 5 postscript figure

Mixing of scalar glueballs and flavor-singlet scalar mesons