Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2007-01-15
Phys.Lett.B650:304-311,2007
Physics
High Energy Physics
High Energy Physics - Lattice
17 pages, 5 figures, references added, typos corrected
Scientific paper
10.1016/j.physletb.2007.04.054
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 \lesssim 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, \bar{l}_3 and \bar{l}_4 are evaluated with small statistical errors.
Boucaud Ph.
collaboration ETM
Dimopoulos Petros
Farchioni Federico
Frezzotti Roberto
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