On compositeness of and its decay to

Abstract

We demonstrate that the D_s0^*(2317) D s 0 ∗ ( 2317 ) can be described as a bound-state pole arising from the coupling between a discrete cs̅(1³P₀) c s ¯ ( 1 3 P 0 ) state and the DK continuum state in the Lee–Friedrichs model. The elementariness and compositeness of the D_s0^*(2317) D s 0 ∗ ( 2317 ) are determined to be about Z:X≈ 51.1 %:48.9% Z : X ≈ 51.1 % : 48.9 % , indicating a nearly equal admixture of compact quark-model state and hadronic molecular components. The decay width of D_s0^*(2317)→ D_s⁺π ⁰ D s 0 ∗ ( 2317 ) → D s + π 0 is evaluated within the quark rearrangement framework. The transition cs̅(1³P₀)→ D_sπ ⁰ c s ¯ ( 1 3 P 0 ) → D s π 0 proceeds via the OZI-allowed cs̅(1³P₀)−D_sη c s ¯ ( 1 3 P 0 ) - D s η coupling followed by η −π ⁰ η - π 0 mixing, which serves as the primary source of isospin violation in this channel. The coupling between DK and D_sπ ⁰ D s π 0 is computed in a quark rearrangement model, where the isospin violation effect originates from the mass difference between the D⁰K⁺ D 0 K + and D⁺K⁰ D + K 0 thresholds. The parameters of the scheme shares the same ones with those of the underlying potential model and only the vacuum production strength is adjusted to reproduce the physical D_s0^*(2317) D s 0 ∗ ( 2317 ) mass. We examine the sensitivity of our results to the only free parameter, the pair-creation strength γ γ , and discuss the systematic uncertainties associated with the truncation of coupled channels and the underlying phenomenological potential model. This calculation may shed more insight to the nature of exotic D_s0^*(2317) D s 0 ∗ ( 2317 ) state and its isospin-breaking decay properties.

Versions

On Compositeness of D_s0^*(2317) and its decay to D_sπ⁰PreprintarXiv · 10.48550/arxiv.2606.14305

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arXiv29 Oct 2026PreprintarXiv licenceFull textHigh-energy & particle physicsarXiv
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BibTeX RIS

BibTeX

@article{zhou2026compositeness,
  title = {{On compositeness of and its decay to}},
  author = {Yu-Hui Zhou and Xiu-Li Gao and Bin Wu and Jun-Xi Cui and Zhi-Yong Zhou},
  journal = {The European Physical Journal C},
  year = {2026},
  month = oct,
  doi = {10.1140/epjc/s10052-026-16483-5},
  url = {https://link.springer.com/article/10.1140/epjc/s10052-026-16483-5},
  note = {CC BY 4.0},
}

RIS

TY  - JOUR
TI  - On compositeness of and its decay to
AU  - Yu-Hui Zhou
AU  - Xiu-Li Gao
AU  - Bin Wu
AU  - Jun-Xi Cui
AU  - Zhi-Yong Zhou
PY  - 2026
DA  - 2026/10/22
JO  - The European Physical Journal C
DO  - 10.1140/epjc/s10052-026-16483-5
UR  - https://link.springer.com/article/10.1140/epjc/s10052-026-16483-5
AB  - We demonstrate that the D_s0^*(2317) D s 0 ∗ ( 2317 ) can be described as a bound-state pole arising from the coupling between a discrete cs̅(1^3P_0) c s ¯ ( 1 3 P 0 ) state and the DK continuum state in the Lee–Friedrichs model. The elementariness and compositeness of the D_s0^*(2317) D s 0 ∗ ( 2317 ) are determined to be about Z:X≈ 51.1 %:48.9% Z : X ≈ 51.1 % : 48.9 % , indicating a nearly equal admixture of compact quark-model state and hadronic molecular components. The decay width of D_s0^*(2317)→ D_s^+π ^0 D s 0 ∗ ( 2317 ) → D s + π 0 is evaluated within the quark rearrangement framework. The transition cs̅(1^3P_0)→ D_sπ ^0 c s ¯ ( 1 3 P 0 ) → D s π 0 proceeds via the OZI-allowed cs̅(1^3P_0)−D_sη c s ¯ ( 1 3 P 0 ) - D s η coupling followed by η −π ^0 η - π 0 mixing, which serves as the primary source of isospin violation in this channel. The coupling between DK and D_sπ ^0 D s π 0 is computed in a quark rearrangement model, where the isospin violation effect originates from the mass difference between the D^0K^+ D 0 K + and D^+K^0 D + K 0 thresholds. The parameters of the scheme shares the same ones with those of the underlying potential model and only the vacuum production strength is adjusted to reproduce the physical D_s0^*(2317) D s 0 ∗ ( 2317 ) mass. We examine the sensitivity of our results to the only free parameter, the pair-creation strength γ γ , and discuss the systematic uncertainties associated with the truncation of coupled channels and the underlying phenomenological potential model. This calculation may shed more insight to the nature of exotic D_s0^*(2317) D s 0 ∗ ( 2317 ) state and its isospin-breaking decay properties.
SN  - 1434-6044
SN  - 1434-6052
ER  -

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