Speaker
Mitja Sadl
(Faculty of Mathematics and Physics, University of Ljubljana)
Description
We present an investigation of the spectrum of exotic charmonium-like mesons using lattice QCD. The focus is on $\bar cc \bar qq$ $J^{PC}=1^{+\pm}$ states with isospin 1. Many mesons with properties incompatible with a $\bar cc$ structure have already been discovered, e. g. the $Z_c$ mesons with isospin 1. A lattice study of a four-quark system with two different total momenta and on two different lattice sizes is made. We extract the energy levels, use Lüscher's formalism, and determine the scattering length for the $D\bar D^*$ scattering close to the threshold. A comparison to results from the phenomenological approaches is made, and the constraints on the scattering length are given.
Primary authors
Mitja Sadl
(Faculty of Mathematics and Physics, University of Ljubljana)
Sara Collins
(University of Regensburg)
M. Padmanath
(Helmholtz Inst., Mainz)
Sasa Prelovsek
(University of Ljubljana, Jozef Stefan Institute)
