AI 中文总结
提出一种结合重加权与去加权的新方法，在Hessian形式主义中实现理论更新对部分子分布全局分析的影响评估，并通过更新中微子DIS双缪子产生处理验证其应用。
AI 中文摘要
我们为部分子分布重加权方法的工具箱提出了一项新的扩展，使得一般用户能够研究更新后的理论预测对已有部分子分布全局分析结果的影响。该新方法是众所周知的加权方法（reweighting method）与一种新的去加权变体（deweighting variant）的结合，后者以近似方式将数据集从原始分析中移除。该方法的具体用例可包括：测试在全局分析中将某可观测量的处理从 N$^n$LO 精度更新至 N$^{n+1}$LO 精度的影响，或纳入先前忽略的电弱效应、质量效应、重求和效应或高扭效应，甚至测试某些超出标准模型物理的影响。我们讨论了该方法在 Hessian 形式主义中的实现，并通过一个案例研究展示了其应用，在该案例中，我们利用新颖的半单举深度非弹性散射（SIDIS）方法更新了中微子诱导的深度非弹性散射（DIS）中双缪子产生的处理。
英文摘要
We present a new extension to the toolbox of parton-distribution reweighting methods, which enables a general user to study the impact of an updated theory prediction on the results of a pre-existing parton-distribution global analysis. This new method is a combination of the well-known reweighting method with a new deweighting variant where a dataset is removed from the original analysis in an approximate way. Specific use cases of this method could include e.g. testing the impact of updating the treatment of an observable from N$^n$LO to N$^{n+1}$LO precision in the global analysis, or including previously ignored electroweak, mass, resummation, or higher-twist effects, or even testing the impact of some beyond-standard-model physics. We discuss the implementation of this method in the Hessian formalism, and show its use in a single case study, where we update the treatment of dimuon production in neutrino-induced DIS with the novel semi-inclusive DIS approach.
Comments5 pages, 1 figure; prepared for the proceedings of the 33rd International Workshop on Deep Inelastic Scattering and Related Subjects (DIS2026)
