Speaker
Francesco Knechtli
(Bergische Universität Wuppertal, Germany)
Description
We extend our study of the static potential in $N_f$=2+1 QCD to determine its quark mass dependence. We use a set of CLS (Coordinated Lattice Simulations) ensembles at a lattice spacing a=0.064 fm along a chiral trajectory of constant sum of the bare quark masses. The pion masses range from $m_\pi$=420 MeV at the symmetric point down to $m_\pi$=200 MeV. We use a model to parametrize the lowest three static potentials in the region where string breaking occurs due to formation of a pair of static-light or static-strange mesons. We find that the model works very well at all quark masses analyzed and discuss the dependence of its parameters as the quark mass is varied.
Primary authors
Ben Hörz
(Lawrence Berkeley National Laboratory, Berkeley, USA)
Colin Morningstar
(Carnegie Mellon University, Pittsburgh, USA)
Francesco Knechtli
(Bergische Universität Wuppertal, Germany)
John Bulava
(DESY, Zeuthen, Germany)
Mike Peardon
(Trinity College Dublin, Ireland)
Vanessa Koch
(Bergische Universität Wuppertal, Germany)
