String breaking by light and strange quarks in QCD

by Vanessa Koch (Trinity College Dublin and University of Wuppertal)

Monday 27 May 2019, 16:00 → 17:00 Europe/Berlin

DESY

The static potential V(r) between a static quark and a static antiquark separated by a distance r is defined as the energy of the ground state of this system. As a consequence of confinement, the energy between the quark-antiquark pair is contained inside a color flux tube, the so called string. As soon as the energy is high enough, the gluonic string connecting the quarks will break due to pair creation. We investigate this phenomenon with N_f = 2 + 1 flavors of dynamical Wilson fermions in the stochastic LapH framework, using an ensemble of gauge configurations generated through the CLS effort. We observe the effect of the third sea-quark flavor, which results in a second mixing-phenomenon due to the creation of a strange-antistrange pair.