Speaker
Sasa Prelovsek
Description
The first lattice study of coupled-channel $D\bar D$ and $D_s\bar D_s$ scattering is presented. The partial waves $l=0,2$ are investigated on CLS ensembles. The resulting scattering matrix suggests the existence of three charmonium-like states with $J^{PC}=0^{++}$ in addition to $\chi_{c0}(1P)$: a $D\bar D$ bound state just below threshold, a broader resonance likely related to $\chi_{c0}(3860)$ and a narrow resonance just below $D_s\bar D_s$ with a large coupling to this threshold. The partial wave $l=2$ features a $J^{PC}=2^{++}$ resonance likely related to $\chi_{c2}(3930)$. We work with several assumptions, such as the omission of $J/\psi\omega$, $\eta_c\eta$ and three-particle channels.
Primary authors
Sasa Prelovsek
Sara Collins
(University of Regensburg)
Daniel Mohler
(Helmholtz-Institut Mainz)
M. Padmanath
(Mainz University)
Stefano Piemonte
(University of Regensburg)
