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Quenched chiral logarithms in lattice QCD with overlap Dirac quarks

✍ Scribed by Ting-Wai Chin; Tung-Han Hsieh

Publisher: Elsevier Science
Year: 2003
Tongue: English
Weight: 244 KB
Volume: 119
Category: Article
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(03)01686-4

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✦ Synopsis

We examine quenched chiral logarithms in lattice QCD with overlap Dirac quarks. From our data of ma, we determine the coefficient of quenched chiral logarithm b = 0.203( 14), 0.176(17), 0.193(17) and 0.200(13) for lattices of sizes 83 x 24, lo3 x 24, 123 x 24 and 163 x 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 17' mass in quenched chiral perturbation theory to obtain an independent determination of 5 = 0.198(27), 0.173(24), 0.169( 22), which are in good agreement with those determined from rnz.

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