Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2002-08-28
Nucl.Phys.Proc.Suppl.119C:793-795,2003
Physics
High Energy Physics
High Energy Physics - Lattice
Lattice2002(chiral), 3 pages, 2 figures
Scientific paper
10.1016/S0920-5632(03)01686-4
We examine quenched chiral logarithms in lattice QCD with overlap Dirac quarks. From our data of m_pi^2, we determine the coefficient of quenched chiral logarithm delta = 0.203(14), 0.176(17), 0.193(17) and 0.200(13) for lattices of sizes 8^3 times 24, 10^3 times 24, 12^3 times 24 and 16^3 times 32 respectively. Also, for the first three lattice sizes, we measure the index susceptibility of the overlap Dirac operator, and use the exact relation between the index susceptibility and the eta' mass in quenched chiral perturbation theory to obtain an independent determination of delta = 0.198(27), 0.173(24), 0.169(22), which are in good agreement with those determined from m_pi^2.
Chiu Ting-Wai
Hsieh Tung-Han
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