Pseudoscalar decay constants from N_f=2+1+1 twisted mass lattice QCD

Abstract

We present first results for the pseudoscalar decay constants $f_K$, $f_D$ and $f_{D_s}$ from lattice QCD with N_f=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.

arXiv comment7 pages, 2 figures, presented at the XXVIII International Symposium on Lattice Field Theory, Lattice 2010

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Cited by in corpus (12)

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• Sigma terms and strangeness content of the nucleon with $N_f=2+1+1$ twisted mass fermions
• Hadron-Hadron Interactions from $N_f=2+1+1$ Lattice QCD: isospin-2 $\pi \pi$ scattering length
• η and η' mesons from Nf=2+1+1 twisted mass lattice QCD
• Determination of Low-Energy Constants of Wilson Chiral Perturbation Theory
• Overlap valence quarks on a twisted mass sea: a case study for mixed action Lattice QCD
• Review: The FLAG working group
• Towards Four-Flavour Dynamical Simulations
• Lattice QCD Study of $B$-meson Decay Constants from ETMC
• Renormalization constants for Wilson fermion lattice QCD with four dynamical flavours
• Pseudoscalar decay constants $f_K/f_{\pi }$, $f_D$ and $f_{D_s}$ with $N_f=2+1+1$ ETMC configurations