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Light hadrons from Nf = 2+1+1 dynamical twisted mass fermions (2010)

Baron, Rémi ; Blossier, Benoit ; Boucaud, Philippe ; Carbonell, Jaume ; Deuzeman, Albert ; Drach, Vincent ; Farchioni, Federico ; Farchioni, Federico ; Gimenez, Vicent ; Herdoiza, Gregorio ; Jansen, Karl ; Michael, Chris ; Montvay, István ; Pallante, Elisabetta ; Pène, Olivier ; Reker, Siebren ; Urbach, Carsten ; Wagner, Marc ; Wenger, Urs

We present results of lattice QCD simulations with mass-degenerate up and down and mass-split strange and charm (Nf = 2+1+1) dynamical quarks using Wilson twisted mass fermions at maximal twist. The tuning of the strange and charm quark masses is performed at three values of the lattice spacing a ~ 0:06 fm, a ~ 0:08 fm and a ~ 0:09 fm with lattice sizes ranging from L ~ 1:9 fm to L ~ 3:9 fm. We perform a preliminary study of SU(2) chiral perturbation theory by combining our lattice data from these three values of the lattice spacing.

Kaon and D meson masses with Nf = 2+1+1 twisted mass lattice QCD (2010)

Baron, Rémi ; Boucaud, Philippe ; Carbonell, Jaume ; Drach, Vincent ; Farchioni, Federico ; Herdoiza, Gregorio ; Jansen, Karl ; Michael, Chris ; Montvay, István ; Pallante, Elisabetta ; Reker, Siebren ; Urbach, Carsten ; Wagner, Marc ; Wenger, Urs

We discuss the computation of the kaon and D meson masses in the Nf = 2+1+1 twisted mass lattice QCD setup, where explicit heavy flavor and parity breaking occurs at finite lattice spacing. We present three methods suitable in this context and verify their consistency.

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