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Bing-Dong Wan

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Open access Sep 2026

Discriminating baryonium and final-state-interaction interpretations of $X(2356)$

We revisit the $X(2356)$ enhancement observed by BESIII in $e^+e^-\to\Lambda\bar\Lambda\eta$ from the viewpoint of near-threshold dynamics. Motivated by the possibility of light $\Lambda\bar\Lambda$ baryonium, we compare this interpretation with final-state-interaction (FSI) explanations within a minimal FSI-dressed...

Bing-Dong Wan, Sheng-Xi Zhang · 0 citations
Preprint Sep 2026

Complete product-state contact set and optimality of the canonical three-qubit Shifts witness

For the three-qubit Shifts unextendible product basis (UPB), the minimum product-state expectation value $\lambda_{\mathrm{Shifts}}=1-3\sqrt6/8$ of the UPB projector is known, and four attaining product states were exhibited previously. We determine the complete equality set over all complex product states and prove th...

Bing-Dong Wan, Yuchen Guo · 0 citations

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