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Threshold Upsilon-meson photoproduction at the EIC and EicC
Physical Review D ( IF 5 ) Pub Date : 2021-10-26 , DOI: 10.1103/physrevd.104.074028
Igor I. Strakovsky 1 , William J. Briscoe 1 , Lubomir Pentchev 2 , Axel Schmidt 1
Affiliation  

High-accuracy ϒ-meson photoproduction data from EIC and EicC experiments will allow the measurement of the near-threshold total cross section of the reaction γpϒp, from which the absolute value of the ϒp-scattering length, |αϒp|, can be extracted using a vector-meson dominance model. For this evaluation, we used ϒ-meson photoproduction quasidata from the QCD approach (the production amplitude can be factorized in terms of gluonic generalized parton distributions and the quarkonium distribution amplitude). A comparative analysis of |αϒp| with the recently determined scattering lengths for ωp, ϕp, and J/ψp using the A2, CLAS, and GlueX experimental data are performed. The role of the “young” vector-meson effect is evaluated.

中文翻译:

EIC 和 EicC 的阈值 Upsilon-介子光生产

高精确度 -来自 EIC 和 EicC 实验的介子光产生数据将允许测量反应的近阈值总横截面 γ,其中的绝对值 -散射长度, |α|,可以使用矢量介子优势模型提取。对于这次评估,我们使用了-来自 QCD 方法的介子光产生准数据(产生幅度可以根据胶子广义部分分布和夸克分布幅度进行分解)。比较分析|α| 与最近确定的散射长度 ω, φ, 和 J/ψ使用 A2、CLAS 和 GlueX 实验数据进行。评估“年轻”矢量介子效应的作用。
更新日期:2021-10-26
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