From lattice QCD to predictions of scattering phase shifts at the physical point

TL;DR

This paper compares lattice QCD predictions of scattering phase shifts with recent experimental results, providing evidence for a flavor-sextet state in open-charm meson interactions and demonstrating consistency across different approaches.

Contribution

It offers the first comparison of lattice QCD phase shift predictions with experimental data in the open-charm sector, highlighting the quark-mass dependence of a potential flavor-sextet state.

Findings

Consistent phase shift results between lattice QCD and experimental data.

Evidence supporting the existence of a flavor-sextet state in Dπ and D*π channels.

Observation of significant quark-mass dependence in the scattering channels.

Abstract

The Hadron Spectrum Collaboration (HSC) presented new results on two of their ensembles for s-wave scattering phase shifts in the open-charm sector of QCD. For such ensembles we have made predictions that are based on the chiral Lagrangian that were published two years ago. In this talk we confront our phase shifts with those of HSC. A remarkably consistent picture emerges. In particular there is mounting evidence for the existence of a flavor-sextet state in the $D \pi$ and $D^*\pi$ channels, that show a striking quark-mass dependence.