文章基本信息

标题：Epsilon regime calculations with reweighted clover fermions
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作者：A. Hasenfratz ; R. Hoffmann ; S. Schaefer 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2008
卷号：2008
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We perform fully dynamical simulations at small quark masses by reweighting in the quark mass, calculating the weight factors stochastically. This approach avoids some of the technical difculties associated with direct simulations. We nd that the weight factors uctuate only moderately on nHYP smeared dynamicalWilson-clover ensembles, and demonstrate that the overlap between the original and reweighted congurations is large both for short and long distance observables. We could successfully reweight 164, (1.85fm)4 volume congurations from mq 20 MeV to mq 5 MeV, and 244, (2.77fm)4 congurations from mq 8MeV to mq 3 MeV quark masses, reaching the e -regime. Using the pseudoscalar and axialvector correlators we predict the low energy constants S and F and study their volume and mass dependence.