Speaker
Francesco Giacomo Knechtli
(Bergische Universitaet Wuppertal (DE))
Description
We study using lattice QCD the phenomenon of string breaking, the flattening of the ground state potential between a static quark and a static anti-quark at large separation distance due to the formation of a pair of static-light mesons. We compute the three lowest energy levels of the static potential in QCD with light (degenerate up and down) and strange dynamical quarks for a set of quark masses and extrapolate to the physical point. We resolve the avoided level crossings due to string breaking. These energy levels can be used as input to investigations of quarkonia above threshold and heavy-light and heavy-strange coupled-channel meson scattering.
Author
Francesco Giacomo Knechtli
(Bergische Universitaet Wuppertal (DE))