Prediction of doubly-charm hadronic molecules with double strange quarks
Abstract
In this work, we investigate whether the T-doublet charmed-strange mesons and their antiparticles can form hidden-charm hidden-strangeness molecular tetraquarks by applying the one-boson-exchange model. We identify Ds1D̅s1 (JPC=0++, 1+−, 2++), Ds1D̅s2* (JPC=1+±, 2+±, 3+±), and Ds2*D̅s2* (JPC=0++, 1+−, 2++, 3+−, 4++) as promising hidden-charm hidden-strangeness molecular tetraquark candidates. Notably, the Ds1D̅s2* state with JPC=2+− possesses exotic spin-parity quantum numbers forbidden for conventional mesons, providing a clean experimental signature for exotic hadrons. Moreover, the Ds2*D̅s2* state with JPC=4++ is a rare high-spin hadronic molecule. We then extend the same framework to discuss the binding properties of the Ts Ts systems and construct the mass spectrum of corresponding doubly-charm doubly-strangeness molecular tetraquarks. The promising candidates are Ds1Ds1 (JP=2+), Ds1Ds2* (JP=3+), and Ds2*Ds2* (JP=4+), all of which are absolutely flavor-exotic. We encourage experimental searches for these predicted hadronic molecules, which would be a crucial step toward establishing doubly-charm molecular tetraquarks with strangeness S=0 or $2$.
Versions
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BibTeX
@misc{wang2026prediction,
title = {{Prediction of doubly-charm hadronic molecules with double strange quarks}},
author = {Fu-Lai Wang and Xiang Liu},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2606.01758},
eprint = {2606.01758},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2606.01758},
}
RIS
TY - UNPB
TI - Prediction of doubly-charm hadronic molecules with double strange quarks
AU - Fu-Lai Wang
AU - Xiang Liu
PY - 2026
DA - 2026/09/19
PB - arXiv
DO - 10.48550/arxiv.2606.01758
UR - https://arxiv.org/abs/2606.01758
AB - In this work, we investigate whether the T-doublet charmed-strange mesons and their antiparticles can form hidden-charm hidden-strangeness molecular tetraquarks by applying the one-boson-exchange model. We identify D_s1D̅_s1 (J^PC=0^++, 1^+−, 2^++), D_s1D̅_s2^* (J^PC=1^+±, 2^+±, 3^+±), and D_s2^*D̅_s2^* (J^PC=0^++, 1^+−, 2^++, 3^+−, 4^++) as promising hidden-charm hidden-strangeness molecular tetraquark candidates. Notably, the D_s1D̅_s2^* state with J^PC=2^+− possesses exotic spin-parity quantum numbers forbidden for conventional mesons, providing a clean experimental signature for exotic hadrons. Moreover, the D_s2^*D̅_s2^* state with J^PC=4^++ is a rare high-spin hadronic molecule. We then extend the same framework to discuss the binding properties of the T_s T_s systems and construct the mass spectrum of corresponding doubly-charm doubly-strangeness molecular tetraquarks. The promising candidates are D_s1D_s1 (J^P=2^+), D_s1D_s2^* (J^P=3^+), and D_s2^*D_s2^* (J^P=4^+), all of which are absolutely flavor-exotic. We encourage experimental searches for these predicted hadronic molecules, which would be a crucial step toward establishing doubly-charm molecular tetraquarks with strangeness S=0 or $2$.
ER -