On Compositeness of Ds0*(2317) and its decay to Dsπ0
Abstract
We demonstrate that the Ds0*(2317) can be described as a bound-state pole arising from the coupling between a discrete cs̅(13P0) state and the DK continuum state in the Lee-Friedrichs model. The elementariness and compositeness of the Ds0*(2317) are determined to be about Z:X≈ 51.1 %:48.9%, indicating a nearly equal admixture of compact quark-model state and hadronic molecular components. The decay width of Ds0*(2317)→ Ds+π0 is evaluated within the quark rearrangement framework. The transition cs̅(13P0)→ Dsπ0 proceeds via the OZI-allowed cs̅(13P0)−Dsη coupling followed by η−π0 mixing, which serves as the primary source of isospin violation in this channel. The coupling between DK and Dsπ0 is computed in a quark rearrangement model, where the isospin violation effect originates from the mass difference between the D0K+ and D+K0 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 Ds0*(2317) mass. This calculation may shed more insight to the nature of exotic Ds0*(2317) state and its isospin-breaking decay properties.
Versions
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BibTeX
@misc{zhou2026compositeness,
title = {{On Compositeness of $D_s0^*(2317)$ and its decay to $D_sπ^0$}},
author = {Yu-Hui Zhou and Xiu-Li Gao and Bin Wu and Jun-Xi Cui and Zhi-Yong Zhou},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2606.14305},
eprint = {2606.14305},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2606.14305},
}
RIS
TY - UNPB
TI - On Compositeness of D_s0^*(2317) and its decay to D_sπ^0
AU - Yu-Hui Zhou
AU - Xiu-Li Gao
AU - Bin Wu
AU - Jun-Xi Cui
AU - Zhi-Yong Zhou
PY - 2026
DA - 2026/10/29
PB - arXiv
DO - 10.48550/arxiv.2606.14305
UR - https://arxiv.org/abs/2606.14305
AB - We demonstrate that the D_s0^*(2317) can be described as a bound-state pole arising from the coupling between a discrete cs̅(1^3P_0) state and the DK continuum state in the Lee-Friedrichs model. The elementariness and compositeness of the D_s0^*(2317) are determined to be about 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 is evaluated within the quark rearrangement framework. The transition cs̅(1^3P_0)→ D_sπ^0 proceeds via the OZI-allowed cs̅(1^3P_0)−D_sη coupling followed by η−π^0 mixing, which serves as the primary source of isospin violation in this channel. The coupling between DK and D_sπ^0 is computed in a quark rearrangement model, where the isospin violation effect originates from the mass difference between the D^0K^+ and 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) mass. This calculation may shed more insight to the nature of exotic D_s0^*(2317) state and its isospin-breaking decay properties.
ER -