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arXiv 2303.09175hep-ph
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利用光子跃迁形状因子探究$\chi_{c1}(3872)$的结构

Probing the structure of $χ_{c1}(3872)$ with photon transition form factors

Izabela Babiarz, Roman Pasechnik, Wolfgang Schäfer, Antoni Szczurek

AI总结:

本研究提出通过光子跃迁形状因子探究$\chi_{c1}(3872)$轴矢量介子的结构,推导了最低$c\bar{c}$福克态的形状因子光前波函数表示,验证其约化宽度符合Belle实验限值,相关$Q^2$依赖关系可由未来实验检验,为研究该介子短程结构提供新途径。

摘要:

我们提出通过$\gamma^*_L \gamma\to \chi_{c1}(3872)$跃迁形状因子,研究神秘的$\chi_{c1}(3872)$轴矢量介子的结构。我们推导了最低$c \bar c$福克态(Fock-state)对应的形状因子的光前波函数表示。研究发现,该态的约化宽度完全处于Belle合作组近期公布的当前实验限值范围内,这有力表明$c \bar c$福克态在光子诱导产生过程中发挥关键作用。我们得到的$Q^2$依赖关系可通过未来的单标记$e^+ e^-$实验进行检验,为深入理解该介子的短程结构提供更多线索。

英文摘要:

We propose to study the structure of the enigmatic $χ_{c1}(3872)$ axial vector meson through its $γ^*_L γ\to χ_{c1}(3872)$ transition form factor. We derive a light-front wave function representation of the form factor for the lowest $c \bar c$ Fock-state. We found that the reduced width of the state is well within the current experimental bound recently published by the Belle collaboration. This strongly suggests a crucial role of the $c \bar c$ Fock-state in the photon-induced production. Our results for the $Q^2$ dependence can be tested by future single tagged $e^+ e^-$ experiments, giving further insights into the short-distance structure of this meson.

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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