Charmed meson spectroscopy on the lattice

TL;DR

This paper computes the spectrum of low-lying D and D_s mesons using lattice QCD with 2+1 flavors, exploring S- and P-wave states down to near physical pion masses, and compares results with experimental data.

Contribution

It provides new lattice QCD calculations of charmed meson spectra including excited states and benchmarks against charmonium, highlighting differences near multi-particle thresholds.

Findings

Charmonium spectrum agrees with experiment

Differences observed in charmed mesons near multi-particle thresholds

Exploration of S- and P-wave states at near-physical pion masses

Abstract

We present a calculation of the spectrum of low-lying D and D_s mesons calculated on 2+1 flavor configurations with Clover-Wilson quarks generated by the PACS-CS collaboration. S- and P-wave states are explored for pion masses down to 156MeV, including some excited states. As a benchmark, a calculation of the low-lying charmonium spectrum is performed. While the charmonium results agree favorably with experiment, noticeable differences remain for charmed mesons in channels where resonances close to multi-particle thresholds exist.