Partially quenched study of strange baryon with Nf = 2 twisted mass fermions

The Lattice 2008 proceedings will be published in the online journal, “Proceedings of Science” (PoS) organized by SISSA. All contributions to the Lattice 2008 proceedings will be refereed by the Lattice 2008 Editorial Board, which is composed of the members of the Lattice 2008 Local Organizing Committee.International audienceWe present results on the mass of the baryon octet and decuplet using two flavors of light dynamical twisted mass fermions. The strange quark mass is fixed to its physical value from the kaon sector in a partially quenched set up. Calculations are performed for light quark masses corresponding to a pion mass in the range 270-500 MeV and lattice sizes of 2.1 fm and 2.7 fm. We check for cut-off effects and isospin breaking by evaluating the baryon masses at two different lattice spacings. We carry out a chiral extrapolation for the octet baryons and discuss results for the omega