发表机构
Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine(乌克兰国家科学院博戈柳博夫理论物理研究所)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
本文利用Gottfried-Jackson基中的极化滤波器,从全息振幅中分离膨胀子与横迹无迹胶子贡献,并发现现有模型无法统一描述近阈$J/ψ$光产生数据。
AI 中文摘要
在Hatta-Yang全息引力子-膨胀子振幅框架内,针对近阈$J/ψ$光产生过程,我们在Gottfried-Jackson基中识别出精确的膨胀子零自旋投影通道。$m=0$和$m=-\lambda_\gamma$振幅不包含膨胀子贡献;对于垂直于反应平面的光子极化,$m=0$通道进一步分离出$A_g(t)+B_g(t)$,并需要核子自旋转移。标准束极化自旋密度矩阵元随后提供仅含横迹无迹(TT)的控制项以及包含线性膨胀子-TT干涉的双线性项。与现代GlueX和CLAS12截面数据的比较表明,原始的固定形状全息振幅无法通过单一整体归一化描述完整的近阈数据,这使得极化滤波器成为对产生张量的检验,而非对全局验证反应模型的预测。
英文摘要
Within the Hatta-Yang holographic graviton-dilaton amplitude for near-threshold $J/ψ$ photoproduction, we identify exact dilaton-null spin-projection channels in the Gottfried-Jackson basis. The $m=0$ and $m=-λ_γ$ amplitudes receive no dilaton contribution; for photon polarization normal to the reaction plane the $m=0$ channel further isolates $A_g(t)+B_g(t)$ and requires nucleon spin transfer. Standard beam-polarization spin-density-matrix elements then furnish TT-only controls and a bilinear containing linear dilaton-TT interference. A comparison with modern GlueX and CLAS12 cross sections shows that the original fixed-shape holographic amplitude cannot describe the full near-threshold data with one overall normalization, making the polarization filters tests of the production tensor rather than predictions of a globally validated reaction model.
Comments5 pages, 2 figures