基于包容和半包容深度非弹性散射数据的次至次至首阶精度的螺旋相关部分分布函数

IF 4.3 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Physics Letters B Pub Date : 2025-04-25 DOI:10.1016/j.physletb.2025.139497

Valerio Bertone , Amedeo Chiefa , Emanuele R. Nocera , MAP Collaboration

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引用次数: 0

摘要

我们提出了MAPPDFpol1.0，这是一种从一组纵向极化包涵和半包涵深度非弹性散射数据中确定质子的螺旋相关部分分布函数（pdf）的新方法。确定包括对两个过程的次至次至领先阶的QCD校正，并在将pdf的神经网络参数化与其不确定性的蒙特卡罗表示相结合的框架中进行。我们讨论了确定的质量，特别是它对高阶修正的依赖，对数据集的选择，以及对理论约束的依赖。

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Helicity-dependent parton distribution functions at next-to-next-to-leading order accuracy from inclusive and semi-inclusive deep-inelastic scattering data

We present MAPPDFpol1.0, a new determination of the helicity-dependent parton distribution functions (PDFs) of the proton from a set of longitudinally polarised inclusive and semi-inclusive deep-inelastic scattering data. The determination includes next-to-next-to-leading order QCD corrections to both processes, and is carried out in a framework that combines a neural-network parametrisation of PDFs with a Monte Carlo representation of their uncertainties. We discuss the quality of the determination, in particular its dependence on higher-order corrections, on the choice of data set, and on theoretical constraints.

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来源期刊

Physics Letters B 物理-物理：综合

CiteScore

9.10

自引率

6.80%

发文量

647

审稿时长

3 months

期刊介绍： Physics Letters B ensures the rapid publication of important new results in particle physics, nuclear physics and cosmology. Specialized editors are responsible for contributions in experimental nuclear physics, theoretical nuclear physics, experimental high-energy physics, theoretical high-energy physics, and astrophysics.