Charmed Meson Scattering from Lattice QCD

TL;DR

This paper presents advanced lattice QCD calculations of scattering amplitudes in various D meson channels, identifying poles and couplings to better understand the nature of specific charmed meson states.

Contribution

It introduces a methodology for determining scattering poles and channel couplings in coupled-channel lattice QCD calculations, advancing the understanding of charmed meson states.

Findings

Identification of scattering poles in D meson channels

Determination of channel couplings to these poles

Insights into the nature of specific J^P states

Abstract

State-of-the-art lattice QCD calculations of scattering amplitudes in coupled-channel $D\pi$, $D\eta$ and $D_{s}\bar{K}$ scattering, as well elastic $DK$ scattering are discussed. The methodology employed allows a determination of the relevant poles in the scattering matrix, while also providing a measure of the coupling of each channel to a given pole. By investigating $S$, $P$ and $D$ wave interactions, the nature of states with $J^{P} = 0^{+}$, relevant for the $D^{*}_{0}(2400)$ and $D^{*}_{s0}(2317)$, as well as states with $J^{P} = 1^{-}, 2^{+}$ are discussed.