Lattice investigation of the scalar mesons a 0 ( 980 ) and κ using four-quark operators The ETM collaboration

The ETM collaboration Constantia Alexandrou,a,b Jan Oliver Daldrop,c Mattia Dalla Brida,d Mario Gravina,a Luigi Scorzato,e Carsten Urbachc and Marc Wagnerf Department of Physics, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus Computation-based Science and Technology Research Center, Cyprus Institute, 20 Kavafi Str., Nicosia 2121, Cyprus Helmholtz-Institut für Strahlenund Kernphysik (Theorie) and Bethe Center for Theoretical Physics, Universität Bonn, D-53115 Bonn, Germany School of Mathematics, Trinity College Dublin, Dublin 2, Ireland ECT, Strada delle Tabarelle, 286, I-38123, Trento, Italy Goethe-Universität Frankfurt am Main, Institut für Theoretische Physik, Max-von-Laue-Straße 1, D-60438 Frankfurt am Main, Germany