Compositeness and decay properties of the flavor partner of D*s0(2317)
Abstract
In view of the recent experimental finding of the heavy quark flavor partner of the Ds0(2317) in the bottom sector, the Bs0(5700), we perform the B(*)K̅(*) coupled-channel calculation in the hidden-gauge formalism. By fixing the mass of the bound state generated by the BK̅ interaction with JP=0+ to the observed state, we also predict five new states with JP={ 0,1,2}+ in this sector. In particular, three of them have JP=1+ and masses $5740$, $6005$ and $6065$ MeV, respectively. In addition, we evaluate the decay width of the Bs0 and Bs1 states through the isospin breaking decay mode Bs0π0 and Bs*0π0, respectively. We find that, because these states have large binding energies with respect to the B(*)K̅ threshold, the coupling to the bare component can reduce this decay width by more than half of the decay width, from $50$ keV in the purely molecular model to 10−20 keV, when the Bs0 is coupled to the bare component. We also observe that, after considering heavy-quark-spin violating contributions, the decay width for the Bs1 becomes smaller than for the Bs0.
Related
- Properties of the positive and negative parity charm-strange and bottom-strange mesons Ds, Ds*, Ds0*, Ds1, Bs, Bs*, Bs0*, Bs1 from lattice QCD: masses, decay constants, and compositeness
- On Compositeness of Ds0*(2317) and its decay to Dsπ0
- On compositeness of and its decay to
- Search for the charged lepton flavor violating decay η→ e±μ∓
- Mass Spectra of Doubly Heavy Strange baryons ΩQQ' and their Decay properties
BibTeX
@misc{sanchezillana2026compositeness,
title = {{Compositeness and decay properties of the flavor partner of $D^*_s0(2317)$}},
author = {J. Sánchez-Illana and R. Molina and Pan-Pan Shi},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.07171},
eprint = {2610.07171},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.07171},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Compositeness and decay properties of the flavor partner of D^*_s0(2317)
AU - J. Sánchez-Illana
AU - R. Molina
AU - Pan-Pan Shi
PY - 2026
DA - 2026/10/05
PB - arXiv
DO - 10.48550/arxiv.2610.07171
UR - https://arxiv.org/abs/2610.07171
AB - In view of the recent experimental finding of the heavy quark flavor partner of the D_s0(2317) in the bottom sector, the B_s0(5700), we perform the B^(*)K̅^(*) coupled-channel calculation in the hidden-gauge formalism. By fixing the mass of the bound state generated by the BK̅ interaction with J^P=0^+ to the observed state, we also predict five new states with J^P={ 0,1,2}^+ in this sector. In particular, three of them have J^P=1^+ and masses $5740$, $6005$ and $6065$ MeV, respectively. In addition, we evaluate the decay width of the B_s0 and B_s1 states through the isospin breaking decay mode B_s^0π^0 and B_s^*0π^0, respectively. We find that, because these states have large binding energies with respect to the B^(*)K̅ threshold, the coupling to the bare component can reduce this decay width by more than half of the decay width, from $50$ keV in the purely molecular model to 10−20 keV, when the B_s0 is coupled to the bare component. We also observe that, after considering heavy-quark-spin violating contributions, the decay width for the B_s1 becomes smaller than for the B_s0.
ER -