文章基本信息

标题：Scaling test of quenched Wilson twisted mass QCD at maximal twist
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作者：K. Jansen ; M. Papinutto ; A. Shindler 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2005
卷号：2005
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present the results of an extended scaling test of quenched Wilson twisted mass QCD. We fix the twist angle by using two definitions of the critical mass, the first obtained by requiring the vanishing of the pseudoscalar meson mass mPS for standard Wilson fermions and the second by requiring restoration of parity at non-zero value of the twisted mass m and subsequently extrapolating to m → 0. Depending on the choice of the critical mass we simulate at values of b ∈ [5.7,6.45], for a range of pseudoscalar meson masses 250 MeV . mPS . 1 GeV and we perform the continuum limit for the pseudoscalar meson decay constant fPS and various hadron masses (vector meson mV , baryon octet moct and baryon decuplet mdec) at fixed value of r0mPS. For both definitions of the critical mass, lattice artifacts are consistent with O(a) improvement. However, with the second definition, large O(a2) discretization errors present at small quark mass with the first definition are strongly suppressed. The results in the continuum limit are in very good agreement with those from the Alpha and CP-PACS Collaborations.