通过光锥 QCD 和则的 Y(4230)三体强衰变

IF 1.4 4区物理与天体物理 Q3 PHYSICS, NUCLEAR

International Journal of Modern Physics a Pub Date : 2023-12-01 DOI:10.1142/s0217751x23501750

Zhi-Gang Wang

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引用次数: 0

摘要

我们暂定Y(4230)为矢量四夸克态，在标量双夸克对之间存在相对p波，并通过假设接触四介子耦合常数，用光锥QCD和规则探索了Y(4230)→¯D∗−D∗0 π +，¯D∗−D 0 π +， J/ψπ + π−和J/ψK + K−的三体强衰变。由此产生的部分衰变宽度太小，无法解释实验数据，我们预计这些衰变是通过中间介子发生的。我们可以搜索中间状态并精确测量分支分数来诊断Y状态的性质。

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Three-body strong decays of the Y(4230) via the light-cone QCD sum rules

We tentatively assign the Y (4230) as the vector tetraquark state with a relative P-wave be-tween the scalar diquark pair, and explore the three-body strong decays Y (4230) → ¯ D ∗− D ∗ 0 π + , ¯ D ∗− D 0 π + , J/ψπ + π − and J/ψK + K − with the light-cone QCD sum rules by assuming contact four-meson coupling constants. The resulting partial decay widths are too small to account for the experimental data, and we expect those decays take place through an intermediate meson. We can search for the intermediate states and precisely measure the branching fractions to diagnose the nature of the Y states.

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来源期刊

International Journal of Modern Physics a 物理-物理：核物理

CiteScore

3.00

自引率

12.50%

发文量

283

审稿时长

3 months

期刊介绍： Started in 1986, IJMPA has gained international repute as a high-quality scientific journal. It consists of important review articles and original papers covering the latest research developments in Particles and Fields, and selected topics intersecting with Gravitation and Cosmology. The journal also features articles of long-standing value and importance which can be vital to research into new unexplored areas.