Karlsruhe 2011 – scientific programme

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T: Fachverband Teilchenphysik

T 23: Gittereichtheorie I

T 23.5: Talk

Monday, March 28, 2011, 17:45–18:00, 30.23: 10-1

String Breaking in Lattice QCD with Wilson Twisted Mass Fermions — •Attila Nagy and Marc Wagner — Institut für Physik, Humboldt-Universität zu Berlin, Newtonstr. 15, 12489 Berlin, Germany

We investigate the transition of a static quark-antiquark pair into a static-light meson-antimeson pair when increasing the quark separation numerically by means of Wilson twisted mass lattice QCD with two dynamical quark flavours. To this end a detailed analysis of the symmetries of the problem is carried out, both in QCD and in Wilson twisted mass lattice QCD, and suitable trial states are constructed accordingly.

We show preliminary results, which indicate that string breaking takes place at a quark separation of about 1.1 fm.