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arXiv 2403.20064hep-phhep-lat
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多通道三粒子形式体系:同位对称QCD中的$ηππ+ K \overline K π$系统

Three-particle formalism for multiple channels: the $ηππ+ K \overline K π$ system in isosymmetric QCD

Zachary T. Draper, Stephen R. Sharpe

AI总结:

本研究将三粒子有限体积形式体系推广至多通道情形,以时序微扰论推导了适用于研究$b_1(1235)$等共振态的两通道形式,分析了阈值下的退化情况并给出三粒子K矩阵参数化。

摘要:

我们将已有的三粒子有限体积形式体系推广至可容纳多个三粒子通道的情形。为明确起见,我们聚焦于同位对称QCD中的两通道$ηππ$与$K \overline K π$系统,考虑后者通道的正G宇称扇区,并忽略与四粒子及更多粒子模式的耦合。由此得到的形式体系适用于研究$b_1(1235)$和$η(1295)$共振态。我们采用通用相对论场论方法,借助时序微扰论方法完成推导。我们研究了当能量降至$K \overline K π$阈值以下时,所得量子化条件如何退化为单三粒子通道的量子化条件。我们还给出了该形式体系中涉及的三粒子K矩阵的参数化形式。

英文摘要:

We generalize previous three-particle finite-volume formalisms to allow for multiple three-particle channels. For definiteness, we focus on the two-channel $ηππ$ and $K \overline K π$ system in isosymmetric QCD, considering the positive $G$ parity sector of the latter channel, and neglecting the coupling to modes with four or more particles. The formalism we obtain is thus appropriate to study the $b_1(1235)$ and $η(1295)$ resonances. The derivation is made in the generic relativistic field theory approach using the time-ordered perturbation theory method. We study how the resulting quantization condition reduces to that for a single three-particle channel when one drops below the upper ($K\overline K π$) threshold. We also present parametrizations of the three-particle K matrices that enter into the formalism.

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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