Observation of $$ \psi (3686)\to {K}^{-}\Lambda (1520){\overline{\Xi}}^{+} $$ + c.c.

A bstract Based on (2712 . 4 ± 14 . 3) × 10 6 ψ (3686) events collected at the BESIII detector operating at the BEPCII collider, we present the first observation of the decay $$ \psi (3686)\to {K}^{-}\Lambda (1520){\overline{\Xi}}^{+} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>ψ</mml:mi> <mml:mfenced> <mml:mn>3686</mml:mn> </mml:mfenced> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:mi>Λ</mml:mi> <mml:mfenced> <mml:mn>1520</mml:mn> </mml:mfenced> <mml:msup> <mml:mover> <mml:mi>Ξ</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:mo>+</mml:mo> </mml:msup> </mml:math> + c.c.. The product branching fraction $$ \mathcal{B}\left[\psi (3686)\to {K}^{-}\Lambda (1520){\overline{\Xi}}^{+}+\textrm{c}.\textrm{c}.\right]\times \mathcal{B}\left[\Lambda (1520)\to p{K}^{-}\right] $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>B</mml:mi> <mml:mfenced> <mml:mrow> <mml:mi>ψ</mml:mi> <mml:mfenced> <mml:mn>3686</mml:mn> </mml:mfenced> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:mi>Λ</mml:mi> <mml:mfenced> <mml:mn>1520</mml:mn> </mml:mfenced> <mml:msup> <mml:mover> <mml:mi>Ξ</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:mo>+</mml:mo> </mml:msup> <mml:mo>+</mml:mo> <mml:mi>c</mml:mi> <mml:mo>.</mml:mo> <mml:mi>c</mml:mi> <mml:mo>.</mml:mo> </mml:mrow> </mml:mfenced> <mml:mo>×</mml:mo> <mml:mi>B</mml:mi> <mml:mfenced> <mml:mrow> <mml:mi>Λ</mml:mi> <mml:mfenced> <mml:mn>1520</mml:mn> </mml:mfenced> <mml:mo>→</mml:mo> <mml:mi>p</mml:mi> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>−</mml:mo> </mml:msup> </mml:mrow> </mml:mfenced> </mml:math> is measured to be (9 . 47 ± 0 . 75 ± 0 . 97) × 10 − 7 , where the first uncertainty is statistical and the second systematic.

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Journal
Journal of High Energy Physics
Published
2025-03-19
DOI
https://doi.org/10.1007/jhep03(2025)145
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Particle physics theoretical and experimental studies
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article

Observation of $$ \psi (3686)\to {K}^{-}\Lambda (1520){\overline{\Xi}}^{+} $$ + c.c.

B. J. Liu, K. Sun, K. Goetzen, X. M. Zhang et al.
Journal of High Energy Physics
Particle physics theoretical and experimental studies
article

Observation of $$ \psi (3686)\to {K}^{-}\Lambda (1520){\overline{\Xi}}^{+} $$ + c.c.

B. J. Liu, K. Sun, K. Goetzen, X. M. Zhang, X. Z. Li, X. Zhong, L. B. Guo, T. Chen, Q. M. Li, D. Y. Wang, Y. N. Wang, J. Jackson, L. Q. Huang, T. Li, Z. C. Zhou, X. Y. Zhang, A. Kupść, G. B. Sun, H. Liu, F. C., Y. S. Huang, Y. F. Liang, J. P. Wang, G. Chelkov, J. K. Jiao, J. J. Wang, C. X. Yu, H. M. Liu, F. Stieler, X. H. Li, Feng Li, T. Johansson, O. B. Kolcu, M. H. Ye, J. F. Sun, T. J. Zhu, J. Z. Zhang, M. Scodeggio, N. Kumar, F. Z. Qi, P. L. Liu, H. Q. Zhang, I. Garzia, J. Y. Zhang, Y. Z., T. J. Wang, I. Denysenko, Y. H. Fan, J. Y. Shi, Y. P. Guo, M. Kavatsyuk, Z. X. Meng, M. Y. Dong, Q. J. Xu, M. Kuessner, U. Wiedner, S. Spataro, H.S. Chen, M. Tang, T. Liu, Y. B. Liu, J. X. Teng, M. Maggiora, X. T. Huang, X. R. Zheng, X. Li, Q. L. Niu, Z. D. Zhang, F. Hanisch, C. J. Xu, M. Berlowski, M. Wolke, Y. P. Lu, P. C. Hong, N. Berger, D. H. Zhang, I. Uman, J. S. Zhang, H. B. Jiang, S. Wang, S. Janchiv, C. Q. Feng, S. N. Ruan, L. Y. Tao, A. Limphirat, L. C. Liu, X. Wang, S. Kabana, S. Pacetti, T. Y. Li, R. A. Briere, X. D. Yu, W. D. Niu, Y. Y. Ji, W. M. Song, X. P. Qin, Yin Jiang, H. H. Liu, X. L. Kang, A. Q. Zhang, H. H. Zhang, W. B. Qian, F. H. Liu, R. Q., P. Egorov, C. X. Liu, Y. B. Zhao, Y. H. Meng, W. J. Zhu, Xin-Nian Wang, Lei Zhang, T. Y. Xing, A. Bortone, S. Marcello, Y. Z. Zhou, Y. L. Xiao, Y. P. Pei, P. L. Li, B. Ding, Y. Raghu Reddy, S. B. Liu, T. Yang, Z. H. Zhang, I. Balossino, Y. J. Wu, A. Pathak, Y. J. Su, Y. C. Xu, Z. A. Zhu, C. Q. Deng, M. Pelizaeus, Y. Y. Peng, X. L. Li, J. B. Jiao, H. J. Wang, T. J. Jiang, Z. Y. Li, T. Lin, J. J. Zhang, J. H. Feng, XY Zhang, Z. J. Li, J. G. Messchendorp, Y. Xie, J. L. Zhang, J. Muskalla, K. Y. Liu, S. J. Wang, A. Dbeyssi, Yuhan Ding, S. K. Choi, K. X. Huang, A. Calcaterra, Ziqi Sun, J. Gutiérrez, Peng Huang, K. R. Guruprasad, W. D. Li, F. De Mori, Y. Hu, Ye Zhao, H. J. Yang, R. Aliberti, N. Hüsken, X. K. Zhou, N. Yu. Muchnoi, Q. Y. Zhang, Z. Y. Wang, Q. Zhang, P. Zhang, H. R. Qi, A. Gilman, H. L. Dai, I. B. 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article en

Abstract

A bstract Based on (2712 . 4 ± 14 . 3) × 10 6 ψ (3686) events collected at the BESIII detector operating at the BEPCII collider, we present the first observation of the decay $$ \psi (3686)\to {K}^{-}\Lambda (1520){\overline{\Xi}}^{+} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>ψ</mml:mi> <mml:mfenced> <mml:mn>3686</mml:mn> </mml:mfenced> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:mi>Λ</mml:mi> <mml:mfenced> <mml:mn>1520</mml:mn> </mml:mfenced> <mml:msup> <mml:mover> <mml:mi>Ξ</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:mo>+</mml:mo> </mml:msup> </mml:math> + c.c.. The product branching fraction $$ \mathcal{B}\left[\psi (3686)\to {K}^{-}\Lambda (1520){\overline{\Xi}}^{+}+\textrm{c}.\textrm{c}.\right]\times \mathcal{B}\left[\Lambda (1520)\to p{K}^{-}\right] $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>B</mml:mi> <mml:mfenced> <mml:mrow> <mml:mi>ψ</mml:mi> <mml:mfenced> <mml:mn>3686</mml:mn> </mml:mfenced> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:mi>Λ</mml:mi> <mml:mfenced> <mml:mn>1520</mml:mn> </mml:mfenced> <mml:msup> <mml:mover> <mml:mi>Ξ</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:mo>+</mml:mo> </mml:msup> <mml:mo>+</mml:mo> <mml:mi>c</mml:mi> <mml:mo>.</mml:mo> <mml:mi>c</mml:mi> <mml:mo>.</mml:mo> </mml:mrow> </mml:mfenced> <mml:mo>×</mml:mo> <mml:mi>B</mml:mi> <mml:mfenced> <mml:mrow> <mml:mi>Λ</mml:mi> <mml:mfenced> <mml:mn>1520</mml:mn> </mml:mfenced> <mml:mo>→</mml:mo> <mml:mi>p</mml:mi> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>−</mml:mo> </mml:msup> </mml:mrow> </mml:mfenced> </mml:math> is measured to be (9 . 47 ± 0 . 75 ± 0 . 97) × 10 − 7 , where the first uncertainty is statistical and the second systematic.

Journal of High Energy PhysicsVol. 2025(3)
Goethe University Frankfurt (DE), University of Science and Technology Liaoning (CN), Liaoning University (CN), Università degli Studi del Piemonte Orientale “Amedeo Avogadro” (IT), Uppsala University (SE), University of Science and Technology of China (CN), University of Hawaii System (US), Central South University (CN), Guangxi University (CN), Nanjing Normal University (CN), Liaoning Normal University (CN), North China Electric Power University (CN), Moscow Institute of Physics and Technology (RU), Shandong University (CN), COMSATS University Islamabad (PK), Hangzhou Normal University (CN), Hunan University (CN), Henan University of Science and Technology (CN), University of Groningen (NL), GSI Helmholtz Centre for Heavy Ion Research (DE), University of the Punjab (PK), Hunan Normal University (CN), Henan University (CN), Shanghai Jiao Tong University (CN), Yantai University (CN), University of Tarapacá (CL), South China Normal University (CN), Novosibirsk State University (RU), Yunnan University (CN), Jilin University (CN), Johannes Gutenberg University Mainz (DE), Justus-Liebig-Universität Gießen (DE), University of Ferrara (IT), Qufu Normal University (CN), Peking University (CN), Nankai University (CN), University of Münster (DE), Sichuan University (CN), Indian Institute of Technology Madras (IN), Fudan University (CN), Inner Mongolia University (CN), University of Perugia (IT), Kurchatov Institute (RU), Shandong Normal University (CN), University of Manchester (GB), Guangxi Normal University (CN), China University of Geosciences (CN), Huangshan University (CN), Joint Institute for Nuclear Research (RU), University of Jinan (CN), Henan University of Technology (CN), University of Bristol (GB), Wuhan University (CN), Zhengzhou University (CN), University of Oxford (GB), Central China Normal University (CN), National Centre for Nuclear Research (PL), Institute of Particle Physics (CA), Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara (IT), Helmholtz Institute Mainz (DE), Istinye University (TR), Institute of Modern Physics (CN), Institute of Nuclear and Particle Physics (GR), Jilin Medical University (CN), Shanxi University of Traditional Chinese Medicine (CN), Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati (IT), Piedmont University (US), Bristol Robotics Laboratory (GB), Istituto Nazionale di Fisica Nucleare, Sezione di Perugia (IT), University of Chinese Academy of Sciences (CN), Hebei University (CN), Budker Institute of Nuclear Physics (RU), École Polytechnique Fédérale de Lausanne (CH), China Center of Advanced Science and Technology (CN), University of Turin (IT), Indiana University (US), Chung-Ang University (KR), Near East University (CY), Carnegie Mellon University (US), Henan Normal University (CN), Zhejiang University (CN), Lanzhou University (CN), Renmin University of China (CN), Suranaree University of Technology (TH), Beihang University (CN), Nanjing University (CN), Ruhr University Bochum (DE), University of South China (CN), Shanxi Normal University (CN), Tsinghua University (CN)
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