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.
