论文标题
我们可以使用高$ x $ clas数据安装核PDF吗？
Can we fit our nuclear PDFs with the high-$x$ CLAS data?
论文作者
论文摘要
核部分分布函数（核PDF）是编码结合核子党派行为的非扰动对象。为了避免潜在的更高扭转的贡献，尽管有可能限制拟合参数的潜力，但有时仍将核PDF的高$ x $端的数据从全球提取中排除。在目前的工作中，我们专注于由CLAS/JLAB协作测量的新高$ x $数据覆盖的运动角。通过使用Hessian重新加权技术，我们能够定量测试这些数据与全球分析的核PDF的兼容性，并探索对高$ x $的价值影响。我们发现，数据与EPPS16和NCTEQ15核PDF有很好的一致，而它们不同意Tuju19。讨论了对风味分离，更高扭转的贡献和EMC效应模型的影响。
Nuclear parton distribution functions (nuclear PDFs) are non-perturbative objects that encode the partonic behaviour of bound nucleons. To avoid potential higher-twist contributions, the data probing the high-$x$ end of nuclear PDFs are sometimes left out from the global extractions despite their potential to constrain the fit parameters. In the present work we focus on the kinematic corner covered by the new high-$x$ data measured by the CLAS/JLab collaboration. By using the Hessian re-weighting technique, we are able to quantitatively test the compatibility of these data with globally analyzed nuclear PDFs and explore the expected impact on the valence-quark distributions at high $x$. We find that the data are in a good agreement with the EPPS16 and nCTEQ15 nuclear PDFs whereas they disagree with TuJu19. The implications on flavour separation, higher-twist contributions and models of EMC effect are discussed.
