We study the three Ds quantum channels JP=0+, 1+ and 2+ where experiments have identified the charm-strange states Ds0∗(2317), Ds1(2460), Ds1(2536) near the DK and D∗K thresholds, and Ds2∗(2573). We consider correlation functions for sets of qq operators and, for JP=0+, 1+, also the DK and D∗K meson-meson interpolators and determine for these cases values of the elastic scattering amplitude. Constructing the full set of correlators requires propagators which connect any pair of lattice sites. For one ensemble of gauge configurations (323×64, mπ≈156 MeV) a stochastic distillation variant is employed and for another ensemble (163×32, mπ≈266 MeV) we use the full distillation method. Both, Ds0∗(2317) and Ds1(2460), are found as bound states below threshold, whereas Ds1(2536), and Ds2∗(2573) are identified as narrow resonances close to the experimental masses.
@article{arxiv.1410.6668,
title = {$DK$ and $D^* K$ scattering near threshold},
author = {C. B. Lang and Luka Leskovec and Daniel Mohler and Sasa Prelovsek and R. M. Woloshyn},
journal= {arXiv preprint arXiv:1410.6668},
year = {2015}
}
Comments
7 pages, 3 figures; Contribution to the 32nd International Symposium on Lattice Field Theory, 23-28 June, 2014, Columbia University New York, NY