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arXiv 2104.10646hep-phhep-ex
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双Regge区的$π^-p\toη^{(\prime)}\, π^- p$

$π^-p\toη^{(\prime)}\, π^- p$ in the double-Regge region

JPAC Collaboration, L. Bibrzycki, C. Fernandez-Ramirez, V. Mathieu, M. Mikhasenko, M. Albaladejo, A. N. Hiller Blin, A. Pilloni, A. P. Szczepaniak

摘要:

$η^{(\prime)}π$对的产生是寻找具有明确胶子自由度的杂合奇异分子的黄金通道之一。需要了解与共振区域上方的$η^{(\prime)}π$产生相关的动力学和背景,以对共振提取施加附加约束。我们考虑用COMPASS测量的反应$π^-p\to η^{(\prime)} π^- \,p$。我们表明,在$2.4 < m_{η^{(\prime)}π} < 3.0$ GeV的数据可以描述的振幅基于双Regge交换。介子对的角分布,特别是在$η' π$通道中,可以归因于味单态交换,表明存在一个大的胶子含量,强烈耦合到所产生的介子。

英文摘要:

The production of $η^{(\prime)}π$ pairs constitutes one of the golden channels to search for hybrid exotics, with explicit gluonic degrees of freedom. Understanding the dynamics and backgrounds associated to $η^{(\prime)}π$ production above the resonance region is required to impose additional constraints to the resonance extraction. We consider the reaction $π^-p\to η^{(\prime)} π^- \,p$ measured by COMPASS. We show that the data in $2.4 < m_{η^{(\prime)}π} < 3.0$ GeV can be described by amplitudes based on double-Regge exchanges. The angular distribution of the meson pairs, in particular in the $η' π$ channel, can be attributed to flavor singlet exchanges, suggesting the presence of a large gluon content that couples strongly to the produced mesons.

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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