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Title: Dynamical twisted mass fermions with light quarks
Authors: Boucaud, Ph.
Dimopoulos, P.
Farchioni, F.
Frezzotti, R.
Gimenez, V.
Herdoiza, G.
Jansen, K.
Lubicz, Vittorio
Martinelli, G.
McNeile, C.
Michael, C.
Montvay, I.
Palao, D.
Papinutto, Mauro
Pickavance, J.
Rossi, G.C.
Scorzato, L.
Shindler, A.
Simula, Silvano
Urbach, C.
Wenger, U.
Keywords: Lattice QCD
Dynamical simulations
Chiral perturbation theory
Issue Date: 5-Jul-2007
Publisher: Elsevier
Abstract: We present results of dynamical simulations with 2 flavours of degenerate Wilson twisted mass quarks at maximal twist in the range of pseudo scalar masses from 300 to 550 MeV. The simulations are performed at one value of the lattice spacing a <~ 0.1 fm. In order to have O(a) improvement and aiming at small residual cutoff effects, the theory is tuned to maximal twist by requiring the vanishing of the untwisted quark mass. Precise results for the pseudo scalar decay constant and the pseudo scalar mass are confronted with chiral perturbation theory predictions and the low energy constants F, l3 and l4 are evaluated with small statistical errors.
DOI: 10.1016/j.physletb.2007.04.054
Appears in Collections:A - Articolo su rivista
X_Dipartimento di Fisica 'Edoardo Amaldi'

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