Beam asymmetries for π0, η and η′ in photoproduction at GlueX
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Abstract
The GlueX experiment is a photoproduction experiment located at Thomas Jefferson National Lab in Newport News, Virginia. GlueX is capable of making beam asymmetry ($\Sigma$) measurements using a tagged, linearly-polarized 9 GeV photon beam incident on a hydrogen target. Measurements of the beam asymmetry for the exclusive reactions $\gamma p \rightarrow \pi^0 p$, $\gamma p \rightarrow \eta p$ and $\gamma p \rightarrow \eta' p$ will provide insight into the meson production mechanisms. GlueX measurements are the first beam asymmetry results for the $\eta$ and $\eta'$ in this energy range and are expected to further constrain Regge theory models for photoproduced pseudoscalar mesons. This talk will present preliminary results of the photon beam asymmetries as a function of the Mandelstam variable, t, for multiple $\eta$ decay modes and the $\eta'\rightarrow\pi^+\pi^-\eta$ decay mode.在GlueX光生产中π0， η和η '的光束不对称性
GlueX实验是位于弗吉尼亚州纽波特纽斯的托马斯·杰斐逊国家实验室的一项光生产实验。GlueX能够使用标记的线偏振9 GeV光子束入射到氢目标上进行光束不对称测量($\Sigma$)。对排他性反应$\gamma p \rightarrow \pi^0 p$, $\gamma p \rightarrow \eta p$和$\gamma p \rightarrow \eta' p$的光束不对称性的测量将提供对介子产生机制的深入了解。GlueX测量是$\eta$和$\eta'$在该能量范围内的第一个光束不对称结果，并有望进一步约束光产生伪标量介子的Regge理论模型。本讲座将介绍光子束不对称性作为多个$\eta$衰减模式和$\eta'\rightarrow\pi^+\pi^-\eta$衰减模式的曼德尔斯塔姆变量t的函数的初步结果。
本文章由计算机程序翻译，如有差异，请以英文原文为准。
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