AI 中文总结
研究针对核子深度虚康普顿散射，首次推导其重求和QCD幂次修正，结合深度非弹性散射技术识别核增强高扭度贡献，给出电子离子对撞机束流自旋观测量核修正的定量预测。
AI 中文摘要
广义部分子分布（GPDs）编码了强子的三维结构，但它们在核物质中的修正仍在很大程度上未被约束。我们首次推导了核子深度虚康普顿散射的重求和QCD幂次修正，将深度非弹性散射的技术扩展到该领域，识别出被击夸克在介质中发生相干末态散射产生的核增强高扭度贡献，并对其进行全阶重求和。该修正被有效核子大小A_eff^{1/3}增强，产生了动力学核遮蔽的排他性类似物，其偏移由已被深度非弹性核数据固定的参数控制，无新的非微扰输入。我们给出了电子离子对撞机上束流自旋观测量核修正的定量预测。
英文摘要
Generalized Parton Distributions (GPDs) encode the three-dimensional structure of hadrons, yet their modification in nuclear matter remains largely unconstrained. We report the first derivation of resummed QCD power corrections to deeply virtual Compton scattering on nuclei. Extending techniques from inclusive deep inelastic scattering, we identify the nuclear-enhanced higher-twist contributions generated by coherent final-state scattering of the struck quark in the medium and resum them to all orders. The corrections are enhanced by an effective nuclear size $A_{\rm eff}^{1/3}$ and result in an exclusive analogue of dynamical nuclear shadowing. The shift is controlled by a parameter already fixed by inclusive nuclear data, so no new nonperturbative input enters. We present quantitative predictions for nuclear modifications of beam-spin observables at the Electron--Ion Collider.
CommentsDIS POS
