Observation of ψ3686→K−Λ1520Ξ¯+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \psi (3686)\to {K}^{-}\Lambda (1520){\overline{\Xi}}^{+} $$\end{document} + c.c.

被引：0

作者：

M. Ablikim ^{[1
]}

M. N. Achasov ^{[4
]}

P. Adlarson ^{[89
]}

O. Afedulidis ^{[82
]}

X. C. Ai ^{[3
]}

R. Aliberti ^{[87
]}

A. Amoroso ^{[38
]}

Q. An ^{[79
]}

Y. Bai ^{[81
]}

O. Bakina ^{[76
]}

I. Balossino ^{[61
]}

Y. Ban ^{[60
]}

H.-R. Bao ^{[39
]}

V. Batozskaya ^{[31
]}

K. Begzsuren ^{[49
]}

N. Berger ^{[94
]}

M. Berlowski ^{[68
]}

M. Bertani ^{[1
]}

D. Bettoni ^{[47
]}

F. Bianchi ^{[35
]}

E. Bianco ^{[38
]}

A. Bortone ^{[47
]}

I. Boyko ^{[28
]}

R. A. Briere ^{[31
]}

A. Brueggemann ^{[79
]}

H. Cai ^{[81
]}

X. Cai ^{[79
]}

A. Calcaterra ^{[81
]}

G. F. Cao ^{[79
]}

N. Cao ^{[81
]}

S. A. Cetin ^{[39
]}

X. Y. Chai ^{[5
]}

J. F. Chang ^{[73
]}

G. R. Che ^{[83
]}

Y. Z. Che ^{[1
]}

G. Chelkov ^{[61
]}

C. Chen ^{[28
]}

C. H. Chen ^{[1
]}

Chao Chen ^{[68
]}

G. Chen ^{[1
]}

H. S. Chen ^{[68
]}

H. Y. Chen ^{[65
]}

M. L. Chen ^{[49
]}

S. J. Chen ^{[94
]}

S. L. Chen ^{[1
]}

S. M. Chen ^{[61
]}

T. Chen ^{[46
]}

X. R. Chen ^{[1
]}

X. T. Chen ^{[61
]}

Y. B. Chen ^{[68
]}

机构：

[1] Institute of High Energy Physics,Instituto de Alta Investigación

[2] Beihang University,Key Laboratory of Nuclear Physics and Ion

[3] Bochum Ruhr-University,beam Application (MOE) and Institute of Modern Physics

[4] Budker Institute of Nuclear Physics SB RAS (BINP),State Key Laboratory of Nuclear Physics and Technology

[5] Carnegie Mellon University,School of Physics and Electronics

[6] Central China Normal University,Guangdong Provincial Key Laboratory of Nuclear Science, Institute of Quantum Matter

[7] Central South University,MOE Frontiers Science Center for Rare Isotopes

[8] China Center of Advanced Science and Technology,Lanzhou Center for Theoretical Physics

[9] China University of Geosciences,Department of Mathematical Sciences

[10] Chung-Ang University,undefined

[11] COMSATS University Islamabad,undefined

[12] Lahore Campus,undefined

[13] Fudan University,undefined

[14] GSI Helmholtzcentre for Heavy Ion Research GmbH,undefined

[15] Guangxi Normal University,undefined

[16] Guangxi University,undefined

[17] Hangzhou Normal University,undefined

[18] Hebei University,undefined

[19] Helmholtz Institute Mainz,undefined

[20] Henan Normal University,undefined

[21] Henan University,undefined

[22] Henan University of Science and Technology,undefined

[23] Henan University of Technology,undefined

[24] Huangshan College,undefined

[25] Hunan Normal University,undefined

[26] Hunan University,undefined

[27] Indian Institute of Technology Madras,undefined

[28] Indiana University,undefined

[29] INFN Laboratori Nazionali di Frascati,undefined

[30] INFN Sezione di Perugia,undefined

[31] University of Perugia,undefined

[32] INFN Sezione di Ferrara,undefined

[33] University of Ferrara,undefined

[34] Inner Mongolia University,undefined

[35] Institute of Modern Physics,undefined

[36] Institute of Physics and Technology,undefined

[37] Universidad de Tarapacá,undefined

[38] Jilin University,undefined

[39] Johannes Gutenberg University of Mainz,undefined

[40] Joint Institute for Nuclear Research,undefined

[41] Justus-Liebig-Universitaet Giessen,undefined

[42] II. Physikalisches Institut,undefined

[43] Lanzhou University,undefined

[44] Liaoning Normal University,undefined

[45] Liaoning University,undefined

[46] Nanjing Normal University,undefined

[47] Nanjing University,undefined

[48] Nankai University,undefined

[49] National Centre for Nuclear Research,undefined

[50] North China Electric Power University,undefined

来源：

Journal of High Energy Physics | / 2025卷 / 3期

关键词：

Branching fraction; -; Experiments; Quarkonium; QCD;

D O I：

10.1007/JHEP03(2025)145

中图分类号：

学科分类号：

摘要：

Based on (2712.4 ± 14.3) × 106ψ(3686) events collected at the BESIII detector operating at the BEPCII collider, we present the first observation of the decay ψ3686→K−Λ1520Ξ¯+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \psi (3686)\to {K}^{-}\Lambda (1520){\overline{\Xi}}^{+} $$\end{document} + c.c.. The product branching fraction Bψ3686→K−Λ1520Ξ¯++c.c.×BΛ1520→pK−\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \mathcal{B}\left[\psi (3686)\to {K}^{-}\Lambda (1520){\overline{\Xi}}^{+}+\textrm{c}.\textrm{c}.\right]\times \mathcal{B}\left[\Lambda (1520)\to p{K}^{-}\right] $$\end{document} 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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