Dynamical truncated overlap fermions reproduce the expected π–f₀ and ρ–a₁ screening-mass degeneracies above T_pc in two-flavour lattice QCD.
Mixing of scalar glueballs and flavour-singlet scalar mesons
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abstract
We discuss in detail the extraction of hadronic mixing strengths from lattice studies. We apply this to the mixing of a scalar glueball and a scalar meson in the quenched approximation. We also measure correlations appropriate for flavour-singlet scalar mesons using dynamical quark configurations from UKQCD. This enables us to compare the results from the quenched study of the mixing with the direct determination of the mixed spectrum. Improved methods of evaluating the disconnected quark diagrams are also presented.
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The sigma meson ($f_0$) at finite temperature with truncated overlap fermions
Dynamical truncated overlap fermions reproduce the expected π–f₀ and ρ–a₁ screening-mass degeneracies above T_pc in two-flavour lattice QCD.