Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2011-11-14
Physics
High Energy Physics
High Energy Physics - Lattice
7 pages, 6 figures. Talk given at the XXIX International Symposium on Lattice Field Theory - Lattice 2011, Lake Tahoe, Califor
Scientific paper
We study the 'spectral projector' method for the computation of the chiral condensate and the topological susceptibility, using $N_f=2+1+1$ dynamical flavors of maximally twisted mass Wilson fermions. In particular, we perform a study of the quark mass dependence of the chiral condensate $\Sigma$ and topological susceptibility $\chi_{top}$ in the range $270 MeV < m_{\pi} < 500 MeV$ and compare our data with analytical predictions. In addition, we compute $\chi_{top}$ in the quenched approximation where we match the lattice spacing to the $N_f=2+1+1$ dynamical simulations. Using the Kaon, $\eta$ and $\eta^{\prime}$ meson masses computed on the $N_f=2+1+1$ ensembles, we then perform a preliminary test of the Witten-Veneziano relation.
Cichy Krzysztof
Drach Vincent
Garcia-Ramos Elena
Jansen Karl
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