CAREER: Constraining Parton Distribution Functions for New-Physics Searches

职业：约束新物理搜索的帕顿分布函数

• 批准号: 1653405
• 负责人: Huey-Wen Lin
• 金额: $ 42.5万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-08-01 至 2023-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1653405&HistoricalAwards=false
• 关键词: CAREER; Constraining; Parton; Distribution; Functions

This project concerns physics at the femtoscale (a million times smaller than the nanoscale) within nucleons, the fundamental building blocks of the atomic nuclei. As ever improving precision in experiments puts theories to more stringent tests, highly accurate theoretical calculations are required to advance our understanding of the nucleon structure. In this context, this project will contribute precise numerical calculations of nucleon properties in support of the experimental programs at state-of-the-art experimental facilities, such as the Brookhaven and Jefferson Laboratories in the United States, GSI in Germany, and J-PARC in Japan. This research involves the development of high-performance computational methods and large-scale numerical calculations on supercomputers. This project provides excellent training opportunities for students on both theoretical and numerical methods. This project aims to improve the systematic uncertainties in lattice-QCD (LQCD) determinations of the parton distribution functions (PDFs), to leverage these results to reduce uncertainties in global PDF fits, and to use them to provide more precise Standard-Model inputs to aid new-physics searches and guide upcoming QCD-frontier research. In high-energy physics, PDF uncertainty is the dominant error in the theoretical input to quantities such as the Higgs-production cross section. In nuclear physics, investment at RHIC and JLab 12-GeV has been made to explore the sea-quark and gluon structure of nucleons. The PI made the first LQCD calculation of the Bjorken-x dependence of the PDFs using the "large-momentum effective theory" method. The latter is expected to open new doors of opportunity to the study of multidimensional proton structure, such as generalized parton distributions (GPDs) and transverse-momentum distributions (TMDs). By the end of the award period, the PI will work with the global PDF analysis community to incorporate LQCD results, producing fits with the improved precision needed for new-physics searches at LHC and to make predictions for upcoming measurements at current nuclear laboratories and the future EIC.

这个项目关注的是原子核的基本组成部分核子内的飞秒尺度（比纳米尺度小一百万倍）的物理学。随着实验精度的不断提高，理论受到了更严格的检验，我们需要高精度的理论计算来增进对核子结构的理解。在这方面，该项目将有助于精确的数值计算核子的属性，以支持在国家的最先进的实验设施，如布鲁克海文和杰斐逊实验室在美国，GSI在德国，和J-PARC在日本的实验计划。 该研究涉及高性能计算方法的开发和超级计算机上的大规模数值计算。该项目为学生提供了理论和数值方法的良好培训机会。 该项目旨在改善部分子分布函数（PDF）的晶格QCD（LQCD）确定中的系统不确定性，利用这些结果来减少全局PDF拟合中的不确定性，并使用它们来提供更精确的标准模型输入，以帮助新物理搜索并指导即将到来的QCD前沿研究。在高能物理学中，PDF不确定性是希格斯粒子产生截面等物理量理论输入的主要误差。在核物理方面，RHIC和JLab 12-GeV的投资用于探索核子的海夸克和胶子结构。PI使用“大动量有效理论”方法对PDF的Bjorken-x依赖性进行了第一次LQCD计算。后者有望为研究多维质子结构，如广义部分子分布（GPD）和横动量分布（TMD）打开新的机会之门。在奖励期结束时，PI将与全球PDF分析社区合作，整合LQCD结果，以提高LHC新物理搜索所需的精度，并对当前核实验室和未来EIC即将进行的测量进行预测。

项目成果

Nucleon isovector momentum fraction, helicity and transversity moment using Lattice QCD

使用晶格 QCD 计算核子等向量动量分数、螺旋度和横矩

• DOI: 10.22323/1.396.0513
• 发表时间: 2022
• 期刊: The 38th International Symposium on Lattice Field Theory (LATTICE2021
• 作者: Mondal, Santanu;Bhattacharya, Tanmoy;Gupta, Rajan;Joo, Balint;Lin, Huey-Wen;Park, Sungwoo;Winter, Frank;Yoon, Boram
• 通讯作者: Yoon, Boram

Snowmass 2021 Whitepaper: Proton Structure at the Precision Frontier

Snowmass 2021 白皮书：精密前沿的质子结构

• DOI: 10.5506/aphyspolb.53.12-a1
• 发表时间: 2022
• 期刊: Acta Physica Polonica B
• 影响因子: 0.5
• 作者: Amoroso, S.;Apyan, A.;Armesto, N.;Ball, R.D.;Bertone, V.;Bissolotti, C.;Blümlein, J.;Boughezal, R.;Bozzi, G.;Britzger, D.
• 通讯作者: Britzger, D.

Precision control in lattice calculation of x-dependent pion distribution amplitude

• DOI: 10.1016/j.nuclphysb.2023.116282
• 发表时间: 2023-01
• 期刊: Nuclear Physics B
• 影响因子: 2.8
• 作者: Jack Holligan;X. Ji;Huey-Wen Lin;Yushan Su;Rui Zhang

Impact of lattice strangeness asymmetry data in the CTEQ-TEA global analysis

• DOI: 10.1103/physrevd.107.076018
• 发表时间: 2022-11
• 期刊: Physical Review D
• 影响因子: 5
• 作者: T. Hou;Huey-Wen Lin;Mengshi Yan;C. Yuan

Excited state analysis in the quasi-PDF matrix elements

准 PDF 矩阵元素中的激发态分析

• DOI: 10.22323/1.334.0097
• 发表时间: 2019
• 期刊: The 36th Annual International Symposium on Lattice Field Theory (LATTICE2018
• 作者: Li, Ruizi;Yang, Yi-Bo;Lin, Huey-Wen
• 通讯作者: Lin, Huey-Wen