文章基本信息

标题：Low Energy Particle Physics and Chiral Extrapolations
本地全文：下载
作者：H. Wittig
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2011
卷号：2011
期号：Lattice2011
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：In this review I address the rôle of chiral extrapolations for the determination of several phenomenologically relevant quantities, including light quark masses, meson decay constants and the axial charge of the nucleon. In particular, I discuss whether chiral extrapolations are sufficiently controlled in order to rightfully claim the accuracy which is quoted in recent compilations of these quantities. While this is the case for the masses of the light quarks and the ratio fK= fp of decay constants, small inconsistencies in the chiral and continuum behaviour of individual decay constants fK and fp , as well as the hadronic radii r0 and r1 remain and must be clarified. In the case of the nucleon axial charge, gA, the chiral behaviour is still poorly understood due to the presence of other systematic effects.