arXiv · 2610.34706
First measurement of $ψ(3686)\to\bar{p} K^{+} Σ^{*}(1385)^{0} + c.c.$ and $ψ(3686)\to\bar{p} K^{*}(892)^{0} Σ^{+} + c.c.$
Abstract
Based on a sample of $(2712.4 \pm 14.3) \times 10^6$ $ψ(3686)$ events collected with the BESIII detector at the BEPCII collider, we report the first observation of the decays $ψ(3686)\to\bar{p} K^{+} Σ^{*}(1385)^{0}+c.c.$ and $ψ(3686)\to\bar{p} K^{*}(892)^{0} Σ^{+} + c.c.$. The corresponding branching fractions are determined to be $\mathcal{B}(ψ(3686)\to\bar{p}K^+Σ^{*}(1385)^{0}+c.c.)=(3.94\pm0.15_{\text{stat.}}\pm0.24_{\text{syst.}})\times10^{-5}$ and $\mathcal{B}(ψ(3686)\to\bar{p}K^{*}(892)^{0}Σ^++c.c.)=(4.93\pm0.14_{\text{stat.}}\pm0.30_{\text{syst.}})\times10^{-5}$. Furthermore, we search for the hidden-strange pentaquark candidates $N_{x}(1875)$ and $N_{x}(2100)$ in the invariant mass spectra of $K^{+} Σ^{*}(1385)^{0}$ and $K^{*}(892)^{0} Σ^{+}$, respectively. No significant signals are observed and the upper limits on the branching fractions at the 90% confidence level are $\mathcal{B}(ψ(3686)\to\bar{p}N_{x}(1875)\to\bar{p}K^+Σ^{*}(1385)^{0})<1.58\times10^{-6}$ and $\mathcal{B}(ψ(3686)\to\bar{p}N_{x}(2100)\to\bar{p}K^{*}(892)^{0}Σ^+)<3.09\times10^{-7}$.
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BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson, X. C. Ai, C. S. Akondi, R. Aliberti, A. Amoroso, Q. An, Y. H. An, M. S. Anderson, Y. Bai, O. Bakina, H. R. Bao, X. L. Bao, M. Barbagiovanni, V. Batozskaya, K. Begzsuren, N. Berger, M. Berlowski, M. B. Bertani, D. Bettoni, F. Bianchi, E. Bianco, A. Bortone, I. Boyko, R. A. Briere, A. Brueggemann, D. Cabiati, H. Cai, M. H. Cai, X. Cai, A. Calcaterra, G. F. Cao, N. Cao, S. A. Cetin, X. Y. Chai, J. F. Chang, T. T. Chang, G. R. Che, Y. Z. Che, C. H. Chen, Chao Chen, G. Chen, H. S. Chen, H. Y. Chen, M. L. Chen, S. J. Chen, S. M. Chen, T. Chen, W. Chen, X. R. Chen, X. T. Chen, X. Y. Chen, Y. B. Chen, Y. Q. Chen, Z. K. Chen, J. Cheng, L. N. Cheng, S. K. Choi, X. Chu, G. Cibinetto, F. Cossio, J. Cottee-Meldrum, H. L. Dai, J. P. Dai, X. C. Dai, A. Dbeyssi, R. E. de Boer, D. Dedovich, Z. Y. Deng, A. Denig, I. Denisenko, M. Destefanis, F. De Mori, E. Di Fiore, X. X. Ding, Y. Ding, Y. X. Ding, J. Dong, L. Y. Dong, M. Y. Dong, X. Dong, Z. J. Dong, M. C. Du, S. X. Du, Shaoxu Du, X. L. Du, Y. Q. Du, Y. Y. Duan, Z. H. Duan, P. Egorov, G. F. Fan, J. J. Fan, K. X. Fan, Y. H. Fan, J. Fang, Jin Fang, S. S. Fang, W. X. Fang. 2026-10-26. First measurement of $ψ(3686)\to\bar{p} K^{+} Σ^{*}(1385)^{0} + c.c.$ and $ψ(3686)\to\bar{p} K^{*}(892)^{0} Σ^{+} + c.c.$. https://arxiv.org/abs/2610.34706
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