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Analysis of the $D_{0}^{*} (2300)$ resonance from lattice QCD under chiral symmetry

Jing Luo¹, Bing Wu ^1,*, Pan-Pan Shi ², and Meng-Lin Du^1,†

¹School of Physics, University of Electronic Science and Technology of China, Chengdu 611731, China
²Instituto de Física Corpuscular (centro mixto CSIC-UV), Institutos de Investigación de Paterna, Apartado 22085, 46071 Valencia, Spain

^*Contact author: wu.bing@uestc.edu.cn
^†Contact author: du.ml@uestc.edu.cn

Phys. Rev. D 114, 014066 – Published 29 July, 2026

DOI: https://doi.org/10.1103/8wmv-dlm2

Abstract

We reanalyze the lattice spectra for $I = 1 / 2$ $D π$ scattering in the $A_{1}^{+}$ irreducible representation from [Phys. Rev. D 111, 014503 (2025)] to investigate the impact of chiral and SU(3) flavor symmetries in $S$ -wave $D π$ scattering and the $D_{0}^{*} (2300)$ resonance. By fitting the phase shifts obtained via Lüscher’s formula with both traditional and chirally modified effective-range expansion and $K$ -matrix parametrizations, we find that the chiral factor shifts the extracted pole mass closer to the threshold (especially for resonances) and substantially reduces the resonance width. These findings are confirmed by unitarized chiral perturbation theory through a direct fit to the lattice spectra with both the single-channel and the $D π − D η − D_{s} \bar{K}$ coupled-channel schemes. Once the coupled channels are incorporated, the two-pole structure of the $D_{0}^{*} (2300)$ emerges. The trajectories of the two poles are investigated by varying the pion mass.

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Phys. Rev. D 114, 014066– Published 29 July, 2026

Vol. 114, Iss. 1 — 1 July 2026

Received 23 April 2026
Accepted 6 July 2026

DOI: https://doi.org/10.1103/8wmv-dlm2

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

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Analysis of the $D_{0}^{*} (2300)$ resonance from lattice QCD under chiral symmetry

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Analysis of the D0*(2300) resonance from lattice QCD under chiral symmetry

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Analysis of the $D_{0}^{*} (2300)$ resonance from lattice QCD under chiral symmetry