Probing the two-pole structure of the D0*(2300) with an SU(3) flavor filter
Abstract
We propose an SU(3) flavor-filtering strategy to resolve the two-pole structure associated with the D0*(2300) and to probe its flavor-sextet component directly in invariant-mass distributions. In unitarized chiral dynamics, the two poles originate predominantly from different irreducible representations of the coupled 𝒟Φ system. We show that the strong decays Υ→Ξ̅c(′)Λ(1520)𝒟Φ and the weak decays Ξb(′)→π-Λ(1520)𝒟Φ provide approximately antitriplet- and sextet-selective production sources. The predicted Dπ, Dη, and DsK̅ spectra exhibit complementary signatures: the higher pole near 2.45 GeV generates a characteristic enhancement between the Dη and DsK̅ thresholds and a pronounced near-threshold structure in the sextet-favored channels, whereas the lower pole near 2.1 GeV dominates the antitriplet-favored channels. The contrast between these line shapes directly reflects the flavor representation selected by the corresponding cascade-baryon tag. The Υ modes therefore provide experimentally testable observables for establishing the two-pole nature of the D0*(2300) and for identifying a charmed-meson resonance with a dominant flavor-sextet component, while the weak-decay analysis tests the robustness of the line-shape pattern against changes in the production mechanism.
Related
- Flavor-resolved four-fermion probes at the FCC-ee Z pole
- Probing strange-sector flavor-changing neutral currents at DUNE-like facilities
- Probing the Geometry of Viable Froggatt-Nielsen-like Flavor Textures
- Probing Lepton-Flavor-Violating Four-Lepton Operators at a Muon Collider
- Probing Lepton Flavor Violation at FCC-ee
BibTeX
@misc{he2026probing,
title = {{Probing the two-pole structure of the $D_0^*(2300)$ with an $SU(3)$ flavor filter}},
author = {Ying-Bo He and Liu-Lin Wang and Xiao-Hai Liu and Qiang Zhao},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.26175},
eprint = {2610.26175},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.26175},
}
RIS
TY - UNPB
TI - Probing the two-pole structure of the D_0^*(2300) with an SU(3) flavor filter
AU - Ying-Bo He
AU - Liu-Lin Wang
AU - Xiao-Hai Liu
AU - Qiang Zhao
PY - 2026
DA - 2026/10/19
PB - arXiv
DO - 10.48550/arxiv.2610.26175
UR - https://arxiv.org/abs/2610.26175
AB - We propose an SU(3) flavor-filtering strategy to resolve the two-pole structure associated with the D_0^*(2300) and to probe its flavor-sextet component directly in invariant-mass distributions. In unitarized chiral dynamics, the two poles originate predominantly from different irreducible representations of the coupled 𝒟Φ system. We show that the strong decays Υ→Ξ̅_c^(′)Λ(1520)𝒟Φ and the weak decays Ξ_b^(′)→π^-Λ(1520)𝒟Φ provide approximately antitriplet- and sextet-selective production sources. The predicted Dπ, Dη, and D_sK̅ spectra exhibit complementary signatures: the higher pole near 2.45 GeV generates a characteristic enhancement between the Dη and D_sK̅ thresholds and a pronounced near-threshold structure in the sextet-favored channels, whereas the lower pole near 2.1 GeV dominates the antitriplet-favored channels. The contrast between these line shapes directly reflects the flavor representation selected by the corresponding cascade-baryon tag. The Υ modes therefore provide experimentally testable observables for establishing the two-pole nature of the D_0^*(2300) and for identifying a charmed-meson resonance with a dominant flavor-sextet component, while the weak-decay analysis tests the robustness of the line-shape pattern against changes in the production mechanism.
ER -