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On chiral extrapolations of charmed meson masses and coupled-channel reaction dynamics

Guo, Xiao-Yu ; Heo, Yonggoo ; Lutz, Matthias F. M. (2022):
On chiral extrapolations of charmed meson masses and coupled-channel reaction dynamics. (Publisher's Version)
In: Physical Review D, 98 (1), American Physical Society, ISSN 2470-0010, e-ISSN 2470-0029,
DOI: 10.26083/tuprints-00012798,
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Item Type: Article
Origin: Secondary publication
Status: Publisher's Version
Title: On chiral extrapolations of charmed meson masses and coupled-channel reaction dynamics
Language: English
Abstract:

We perform an analysis of QCD lattice data on charmed-meson masses. The quark-mass dependence of the data set is used to gain information on the size of counterterms of the chiral Lagrangian formulated with opencharm states with JP = 0− and JP = 1− quantum numbers. Of particular interest are those counterterms that are active in the exotic flavor sextet channel. A chiral expansion scheme in which physical masses enter the extrapolation formulas is developed and applied to the lattice data set. Good convergence properties are demonstrated, and an accurate reproduction of the lattice data based on ensembles of PACS-CS, MILC, ETMC, and HSC with pion and kaon masses smaller than 600 MeV is achieved. It is argued that a unique set of lowenergy parameters is obtainable only if additional information from HSC on some scattering observables is included in our global fits. The elastic and inelastic s-wave πD and ηD scattering as considered by HSC is reproduced faithfully. Based on such low-energy parameters, we predict 15 phase shifts and inelasticities at physical quark masses but also for an additional HSC ensemble at smaller pion mass. In addition, we find a clear signal for a member of the exotic flavor sextet states in the ηD channel, below the KD¯ s threshold. For the isospin-violating strong decay width of the D* s0(2317), we obtain the range (104–116) keV.

Journal or Publication Title: Physical Review D
Journal volume: 98
Issue Number: 1
Publisher: American Physical Society
Collation: 36 Seiten
Classification DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
Divisions: 05 Department of Physics > Institute of Nuclear Physics
Date Deposited: 11 Mar 2022 13:15
Last Modified: 11 Mar 2022 13:15
DOI: 10.26083/tuprints-00012798
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-127982
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/12798
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