出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present first results for the pseudoscalar decay constants fK, fD and fDs from lattice QCD with Nf = 2+1+1 flavours of dynamical quarks. The lattice simulations have been performed by the European Twisted Mass collaboration (ETMC) using maximally twisted mass quarks. For the pseudoscalar decay constants we follow a mixed action approach by using so called Osterwalder- Seiler fermions in the valence sector for strange and charm quarks. The data for two values of the lattice spacing and several values of the up/down quark mass is analysed using chiral perturbation theory.
