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arXiv 2408.04020hep-ph
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CTEQ-TEA核子部分子分布全局分析的新结果

New results in the CTEQ-TEA global analysis of parton distributions in the nucleon

A. Ablat, A. Courtoy, S. Dulat, M. Guzzi, T. J. Hobbs, T. -J. Hou, J. Huston, K. Mohan, H. -W. Lin, P. Nadolsky, I. Sitiwaldi, K. Xie, M. Yan, C. -P. Yuan

AI总结:

本文报告CTEQ-TEA全局分析的最新进展,重点介绍基于8 TeV和13 TeV LHC数据的NNLO拟合、统计与数值方法改进,以及高x海夸克、拟合粲、光子PDF和SMEFT-PDF联合分析等唯象研究。

摘要:

本报告总结了CTEQ-TEA核子部分子分布函数(PDFs)全局分析的最新进展。重点是基于8 TeV和13 TeV高精度LHC数据的近期NNLO拟合,包括Drell-Yan过程、喷注产生和顶夸克对产生,这些工作是在发布新一代CTEQ-TEA通用PDFs的过程中推进的。报告还讨论了PDF确定和不确定度量化方面的统计与数值方法进展,强调了对于高风险观测量而言稳健且可复现的不确定度的重要性。此外,报告涵盖了与PDF确定相关的唯象学研究,例如实验约束之间的相互作用、高x核子海夸克与低能宇称破坏测量之间关联的探索、核子中的拟合粲夸克、中子中的光子PDF,以及SMEFT-PDF联合分析。

英文摘要:

This report summarizes the latest developments in the CTEQ-TEA global analysis of parton distribution functions (PDFs) in the nucleon. The focus is on recent NNLO fits to high-precision LHC data at 8 and 13 TeV, including Drell-Yan, jet, and top-quark pair production, pursued on the way toward the release of the new generation of CTEQ-TEA general-purpose PDFs. The report also discusses advancements in statistical and numerical methods for PDF determination and uncertainty quantification, highlighting the importance of robust and replicable uncertainties for high-stakes observables. Additionally, it covers phenomenological studies related to PDF determination, such as the interplay of experimental constraints, exploration of correlations between high-$x$ nucleon sea and low-energy parity-violating measurements, fitted charm in the nucleon, the photon PDF in the neutron, and simultaneous SMEFT-PDF analyses.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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