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arXiv 2312.02604hep-phnucl-th
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揭示粲偶素的性质

Shedding light on charmonium

Zhiguo Wang, Meijian Li, Yang Li, James P. Vary

AI总结:

本研究基于光前QCD的相对论方法计算粲偶素的E1辐射跃迁相关可观测量,无参数预测结果与实验及格点模拟高度吻合,为探究P波粲偶素微观结构提供了途径。

摘要:

我们采用基于光前QCD(量子色动力学)的相对论方法,研究粲偶素内部的E1辐射跃迁。在量子场论中,有两类过程是纯E1跃迁:$\chi_{c0} \to J/\psi\gamma$($\psi\to \chi_{c0}\gamma$)以及$h_c \to \eta_c\gamma$($\eta_c' \to h_c\gamma$),二者均涉及P波粲偶素。我们计算了包括含2P态过程在内的多种过程的E1辐射衰变宽度及对应的跃迁形状因子。这些可观测量为探究P波粲偶素的微观结构提供了途径。研究表明,我们的无参数预测与现有实验测量以及格点模拟结果高度吻合。

英文摘要:

We investigate E1 radiative transitions within charmonium in a relativistic approach based on light-front QCD. In quantum field theory, two sets of processes are pure E1: $χ_{c0} \to J/ψγ$ ($ψ\to χ_{c0}γ$) and $h_c \to η_cγ$ ($η_c' \to h_cγ$), both involving the $P$-wave charmonia. We compute the E1 radiative decay widths as well as the corresponding transition form factors of various processes including those involving $2P$ states. These observables provide an access to the microscopic structures of the $P$-wave charmonium. We show that our parameter-free predictions are in excellent agreement with the experimental measurements as well as lattice simulations whenever available.

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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