Isospin-1/2 Dπ scattering and the lightest D 0 ∗ resonance from lattice QCD
Authors
Gayer, Luke
Lang, Nicolas
Tims, David
Publication Date
2021-07-19Journal Title
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Volume
2021
Issue
7
Language
en
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Gayer, L., Lang, N., Ryan, S. M., Tims, D., Thomas, C. E., & Wilson, D. J. (2021). Isospin-1/2 Dπ scattering and the lightest D 0 ∗ resonance from lattice QCD. Journal of High Energy Physics, 2021 (7) https://doi.org/10.1007/jhep07(2021)123
Abstract
Abstract: Isospin-1/2 Dπ scattering amplitudes are computed using lattice QCD, working in a single volume of approximately (3.6 fm)3 and with a light quark mass corresponding to mπ ≈ 239 MeV. The spectrum of the elastic Dπ energy region is computed yielding 20 energy levels. Using the Lüscher finite-volume quantisation condition, these energies are translated into constraints on the infinite-volume scattering amplitudes and hence enable us to map out the energy dependence of elastic Dπ scattering. By analytically continuing a range of scattering amplitudes, a D0∗ resonance pole is consistently found strongly coupled to the S-wave Dπ channel, with a mass m ≈ 2200 MeV and a width Γ ≈ 400 MeV. Combined with earlier work investigating the Ds0∗, and D0∗ with heavier light quarks, similar couplings between each of these scalar states and their relevant meson-meson scattering channels are determined. The mass of the D0∗ is consistently found well below that of the Ds0∗, in contrast to the currently reported experimental result.
Keywords
Regular Article - Theoretical Physics, Lattice QCD, Lattice Quantum Field Theory
Identifiers
jhep07(2021)123, 16280
External DOI: https://doi.org/10.1007/jhep07(2021)123
This record's URL: https://www.repository.cam.ac.uk/handle/1810/329829
Rights
Licence:
http://creativecommons.org/licenses/by/4.0/
Statistics
Total file downloads (since January 2020). For more information on metrics see the
IRUS guide.