破译的结构 $\eta _c(3945)$

IF 2.9 3区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

The European Physical Journal Plus Pub Date : 2025-09-12 DOI:10.1140/epjp/s13360-025-06749-4

Bing-Dong Wan

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引用次数: 0

摘要

受最近LHCb报道的$\eta _c(3945)$的类调和态的启发，我们在QCD和规则的框架下研究了它的四夸克和分子解释，并在Bethe-Salpeter形式主义和$^3P_0$模型中研究了$\eta _c(nS)$态的解释。结果表明，$0^{-+}$隐粲四夸克和分子的质量分别为$(4.56\pm 0.03)$ GeV和$(4.67\pm 0.03)$ GeV，与$\eta _c(3945)$的质量不太吻合。另一方面，$\eta _c(3S)$态的质量和衰变宽度分别为3.95 GeV和65.28 MeV，这表明$\eta _c(3945)$可以嵌入到$3 ^1S_0$ charmonium构型中。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

$Deciphering the structure of $\eta _c(3945)$$

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Deciphering the structure of $\eta _c(3945)$

Inspired by the charmonium(-like) state of $\eta _c(3945)$ reported by LHCb recently, we examine its tetraquark and molecular interpretations in the framework of QCD sum rules, and $\eta _c(nS)$ states interpretation in the Bethe-Salpeter formalism and $^3P_0$ model. Results show that the masses of $0^{-+}$ hidden-charm tetraquark and molecular are $(4.56\pm 0.03)$ GeV and $(4.67\pm 0.03)$ GeV, respectively, which do not fit well with the mass of the $\eta _c(3945)$. On the other hand, the mass and decay width of $\eta _c(3S)$ state is 3.95 GeV and 65.28 MeV, respectively, which indicates that $\eta _c(3945)$ could be embedded into $3 ^1S_0$ charmonium configuration.

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来源期刊

The European Physical Journal Plus PHYSICS, MULTIDISCIPLINARY-

CiteScore

5.40

自引率

8.80%

发文量

1150

审稿时长

4-8 weeks

期刊介绍： The aims of this peer-reviewed online journal are to distribute and archive all relevant material required to document, assess, validate and reconstruct in detail the body of knowledge in the physical and related sciences. The scope of EPJ Plus encompasses a broad landscape of fields and disciplines in the physical and related sciences - such as covered by the topical EPJ journals and with the explicit addition of geophysics, astrophysics, general relativity and cosmology, mathematical and quantum physics, classical and fluid mechanics, accelerator and medical physics, as well as physics techniques applied to any other topics, including energy, environment and cultural heritage.

破译的结构 \(\eta _c(3945)\)

摘要