查莫铵类态Y(4230)的隐谐强衰变

IF 0.6 4区 物理与天体物理 Q4 PHYSICS, PARTICLES & FIELDS Physics of Particles and Nuclei Pub Date : 2024-08-18 DOI:10.1134/S1063779624700175
G. Ganbold
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引用次数: 0

摘要

我们在约束夸克模型的框架内研究了类粲共振态\(Y(4320)\)的隐粲强衰变,把共振态解释为具有分子型内插电流的四夸克态。我们研究了\(Y\) 的强衰变为矢量和标量共振,后者随后衰变为一对带电的伪标量态。我们计算了 \(Y \to {{\pi }^{ + }}{{{pi }^{ - }}{J \mathord \left/ {\vphantom {J \Psi }} 的强衰变的部分宽度。\right.\kern-0em}Psi }\) and \(Y \to {{K}^{ + }}{{K}^{ - }}{J \mathord\{left/ {\vphantom {J \Psi }}\right.\right.\kern-0em}\Psi }\ ),以及它们的分支率,这是由 BESIII 协作最近确定的。估计的分支比例和计算的部分强衰变宽度与最新的实验结果基本一致。
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Hidden-Charm Strong Decays of Charmonium-Like State Y(4230)

We have studied hidden-charm strong decays of the charmonium-like resonant state \(Y(4320)\) within the framework of a confined quark model by interpreting the resonance as a four-quark state with molecular-type interpolating current. The strong decay of \(Y\) into a vector and a scalar resonance, with the latter decaying, subsequently to a pair of charged pseudoscalar states, has been investigated. We have calculated the partial widths of the strong decays \(Y \to {{\pi }^{ + }}{{\pi }^{ - }}{J \mathord{\left/ {\vphantom {J \Psi }} \right. \kern-0em} \Psi }\) and \(Y \to {{K}^{ + }}{{K}^{ - }}{J \mathord{\left/ {\vphantom {J \Psi }} \right. \kern-0em} \Psi }\), and their branching ratio, which is recently determined by the BESIII Collaboration. The estimated proportion of branching and the calculated partial strong decay widths are in reasonable agreement with the most recent experimental results.

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来源期刊
Physics of Particles and Nuclei
Physics of Particles and Nuclei 物理-物理:粒子与场物理
CiteScore
1.00
自引率
0.00%
发文量
116
审稿时长
6-12 weeks
期刊介绍: The journal Fizika Elementarnykh Chastits i Atomnogo Yadr of the Joint Institute for Nuclear Research (JINR, Dubna) was founded by Academician N.N. Bogolyubov in August 1969. The Editors-in-chief of the journal were Academician N.N. Bogolyubov (1970–1992) and Academician A.M. Baldin (1992–2001). Its English translation, Physics of Particles and Nuclei, appears simultaneously with the original Russian-language edition. Published by leading physicists from the JINR member states, as well as by scientists from other countries, review articles in this journal examine problems of elementary particle physics, nuclear physics, condensed matter physics, experimental data processing, accelerators and related instrumentation ecology and radiology.
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