DK I = 0,D K ¯I = 0, 1 scattering and the Ds0 ∗(2317) from lattice QCD
Abstract
Elastic scattering amplitudes for I = 0 DK and I = 0, 1 D K ¯ are computed in S, P and D partial waves using lattice QCD with light-quark masses corresponding to mπ = 239 MeV and mπ = 391 MeV. The S-waves contain interesting features including a near-threshold JP = 0+ bound state in I = 0 DK, corresponding to the Ds0 ∗(2317), with an effect that is clearly visible above threshold, and suggestions of a 0+ virtual bound state in I = 0 D K ¯. The S-wave I = 1 D K ¯ amplitude is found to be weakly repulsive. The computed finite-volume spectra also contain a deeply-bound D* vector resonance, but negligibly small P -wave DK interactions are observed in the energy region considered; the P and D-wave D K ¯ amplitudes are also small. There is some evidence of 1+ and 2+ resonances in I = 0 DK at higher energies.
- Publication:
-
Journal of High Energy Physics
- Pub Date:
- February 2021
- DOI:
- 10.1007/JHEP02(2021)100
- arXiv:
- arXiv:2008.06432
- Bibcode:
- 2021JHEP...02..100C
- Keywords:
-
- Lattice field theory simulation;
- QCD Phenomenology;
- High Energy Physics - Lattice;
- High Energy Physics - Phenomenology
- E-Print:
- 53 pages, 22 figures, small changes to match published version