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

2010

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

Farchioni, Federico, Herdoiza, Gregorio, Jansen, Karl et al.

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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.

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