文章基本信息

标题：Low lying baryon spectrum with Nf=2+1+1 dynamical twisted quarks.
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作者：V. Drach ; K. Jansen ; M. Papinutto 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2010
卷号：2010
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present first results on the octet and decuplet strange baryon spectrum with Nf = 2+1+1 twisted mass quarks. We use an Osterwalder Seiler valence strange quark with a mass tuned to the kaon and compare the results with those obtained in the unitary setup. This comparison allows to perform a first study of the lattice artefacts introduced by the mixed action approach. We investigate the effect of the strange and charm quarks in the sea by using two lattice spacings and comparing with preceding Nf = 2 twisted mass fermion calculations.