DK I = 0,D K ¯I = 0, 1 scattering and the D_{s}^{0 ∗}(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 lightquark masses corresponding to m_{π} = 239 MeV and m_{π} = 391 MeV. The Swaves contain interesting features including a nearthreshold J^{P} = 0^{+} bound state in I = 0 DK, corresponding to the D_{s}^{0 ∗}(2317), with an effect that is clearly visible above threshold, and suggestions of a 0^{+} virtual bound state in I = 0 D K ¯. The Swave I = 1 D K ¯ amplitude is found to be weakly repulsive. The computed finitevolume spectra also contain a deeplybound D^{*} vector resonance, but negligibly small P wave DK interactions are observed in the energy region considered; the P and Dwave 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
 EPrint:
 53 pages, 22 figures, small changes to match published version