Publications (2)0 Total impact
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Rémi Baron,
Philippe Boucaud,
Albert Deuzeman,
Vincent Drach,
Federico Farchioni,
Vicent Gimenez,
Gregorio Herdoiza,
Karl Jansen,
István Montvay,
David Palao,
Elisabetta Pallante,
Olivier Pène,
Siebren Reker,
Enno E. Scholz,
Carsten Urbach,
Marc Wagner,
Urs Wenger,
for the ETM Collaboration
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ABSTRACT: We present the status of runs performed in the twisted mass formalism with $N_{\rm f}=2+1+1$ flavours of dynamical fermions: a degenerate light doublet and a mass split heavy doublet. The procedure for tuning to maximal twist will be described as well as the current status of the runs using both thin and stout links. Preliminary results for a few observables obtained on ensembles at maximal twist will be given. Finally, a reweighting procedure to tune to maximal twist will be described. Comment: 7 pages, 4 figures, talk presented at the XXVI International Symposium on Lattice Field Theory, July 14-19, 2008, Williamsburg, Virginia, USA
10/2008;
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ABSTRACT: We present our preliminary results on the lowest moment of quark distribution functions of the pion using two flavor dynamical simulations with Wilson twisted mass fermions at maximal twist. The calculation is done in a range of pion masses from 300 to 500 MeV. A stochastic source method is used to reduce inversions in calculating propagators. Finite volume effects at the lowest quark mass are examined by using two different lattice volumes. Our results show that we achieve statistical errors of only a few percent. We plan to compute renormalization constants non-perturbatively and extend the calculation to two more lattice spacings and to the nucleons.
11/2007;
