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arXiv 2004.09970hep-ph
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在有效模型框架下对某些(非)常规介子的研究

Study of some (non-)conventional mesons in the framework of effective models

Milena Piotrowska

摘要:

我们研究的主要目的是通过应用有效的QFT模型来理解一些常规和非常规介子态的性质。我们从包含一个独特的$q\bar{q}$种子状态,这是强耦合到原始状态的低质量衰变产物的相对论拉格朗日。我们发现有些态可能是重$q\bar{q}$介子的动态产生的伴极。特别是,我们表明,$K^*_0(700)$是一个同伴极的著名的$K^*_0(1430)$共振,$X(3872)$出现的(虚拟)同伴极的$χ_{c1}(2P)$,和令人费解的$Y(4008)$不是一个真正的状态,但一个虚假的增强时出现的状态$ψ(4040)$。

英文摘要:

The main aim of our study is to understand the nature of some conventional and non-conventional mesonic states by applying effective QFT models. We start from the relativistic Lagrangians containing a unique $q\bar{q}$ seed state which is strongly coupled to the low-masses decay products of the original state. We find out that some states may appear as a dynamically generated companion poles of the heavier $q\bar{q}$ mesons. In particular we show that $K^*_0(700)$ is a companion pole of the well-known $K^*_0(1430)$ resonance, $X(3872)$ emerges as a (virtual) companion pole of $χ_{c1}(2P)$, and the puzzling $Y(4008)$ is not a real state, but a spurious enhancement which appears when studying the state $ψ(4040)$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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