Global QCD Analysis and Precision Electroweak Physics in High Energy Collider Phenomenology

高能对撞机现象学中的全局 QCD 分析和精密电弱物理

• 批准号: 1719914
• 负责人: Chien-Peng Yuan
• 金额: $ 30万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-08-15 至 2020-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1719914&HistoricalAwards=false
• 关键词: Global; QCD; Analysis; Precision; Electroweak

This award funds the research activities of Professor C.-P. Yuan at the Michigan State University (MSU). This project will contribute to our understanding of the fundamental nature of the physical universe --- the particles that comprise the universe and their interactions --- as revealed through sophisticated experiments in high-energy physics. Our current understanding of this physics is embodied within the so-called Standard Model (SM). Protons, neutrons, and all other strongly-interacting particles are composed of fundamental particles called partons (quarks and gluons), and interactions between these partons are described by the theory of Quantum Chromodynamics (QCD). The proposed research involves the interplay between QCD theory and experimental data from many experiments, including recent experiments at the CERN Large Hadron Collider (LHC). This global analysis of data is necessary in order to deepen our understanding of QCD, and to determine the distributions of the partons in the proton. In particular, by understanding these distributions, it is possible to start with interactions of protons with protons (which are the interactions that actually occur at the LHC) and determine the underlying quark-quark, quark-gluon and gluon-gluon interactions. This is essential for determining the underlying physics of the process --- indeed, such information was necessary for extracting the signal for the recently-discovered Higgs boson from collider data. Support for this project is therefore in the national interest because it furthers the development of fundamental science in the United States and enables the extraction of important data from collider experiments in which substantial national investments have already been made. This project is also envisioned to have significant broader impacts since it will involve the training of students and postdoctoral fellows in theoretical high-energy physics both at Michigan State University and at summer schools held by the Coordinated Theoretical and Experimental QCD (CTEQ) collaboration. More technically, this research will focus on the development of CTEQ-TEA Parton Distribution Functions, earlier versions of which have already have been essential for the interpretation of data from the world's leading high-energy collider facilities such as Fermilab (Batavia, IL), RHIC (Brookhaven, NY), DESY (Hamburg, Germany), and CERN (Geneva, Switzerland). The proposed research will also continue to refine world-leading contributions to lepton-hadron and hadron-hadron collider phenomenology. Complementary to the research on QCD, the group will also study the Electroweak (EW) sector of the Standard Model (SM), which is extremely successful in explaining and predicting experimental data spanning a range in energy from the atomic scale to the Z boson, Higgs boson and top-quark masses. Measurements of the production of W's, Z's, top-quark pairs, single top quarks and Higgs bosons at the LHC, including both inclusive rates and relevant kinematical distributions, will provide major new input into our understanding of parton distributions during the next few years. At the same time, refinements of the parton distributions are necessary for progress in the EW sector, both for testing the SM at greater precision and for probing the effects of new physics at high-energy colliders.

该奖项用于资助密歇根州立大学(MSU)袁正平教授的研究活动。这个项目将有助于我们理解物理宇宙的基本性质-组成宇宙的粒子及其相互作用-通过高能物理中复杂的实验所揭示的。我们目前对这一物理学的理解体现在所谓的标准模型(SM)中。质子、中子和所有其他强相互作用粒子都是由称为部子(夸克和胶子)的基本粒子组成的，这些部子之间的相互作用是用量子色动力学(QCD)理论来描述的。这项拟议的研究涉及QCD理论和许多实验的实验数据之间的相互作用，包括最近在CERN大型强子对撞机(LHC)上的实验。为了加深我们对QCD的理解，并确定质子中部子的分布，这种全球数据分析是必要的。特别是，通过了解这些分布，有可能从质子与质子的相互作用(这是在大型强子对撞机上实际发生的相互作用)开始，并确定潜在的夸克-夸克、夸克-胶子和胶子-胶子相互作用。这对于确定这一过程的基本物理过程是至关重要的-事实上，这种信息对于从对撞机数据中提取最近发现的希格斯玻色子的信号是必要的。因此，对这一项目的支持符合国家利益，因为它促进了美国基础科学的发展，并使从对撞机实验中提取重要数据成为可能，在对撞机实验中已经进行了大量的国家投资。该项目还预计将产生重大的更广泛的影响，因为它将涉及在密歇根州立大学和协调理论与实验QCD(CTEQ)合作举办的暑期学校对学生和博士后研究员进行理论高能物理方面的培训。在更技术上，这项研究将侧重于开发CTEQ-TEA部分子分布函数，其早期版本已经对于解释来自世界领先的高能对撞机设施的数据至关重要，这些设施包括费米实验室(伊利诺伊州巴达维亚)、RHIC(布鲁克海文，纽约)、DESY(德国汉堡)和CERN(瑞士日内瓦)。拟议中的研究还将继续完善轻子-强子和强子-强子对撞机现象的世界领先贡献。作为对QCD研究的补充，该小组还将研究标准模型(SM)的电弱(EW)部分，该模型在解释和预测从原子尺度到Z玻色子、希格斯玻色子和顶夸克质量的能量范围内的实验数据方面非常成功。在大型强子对撞机上测量W、Z、顶夸克对、单顶夸克和希格斯玻色子的产生，包括包含率和相关的运动学分布，将为我们在未来几年对部分子分布的理解提供重要的新输入。与此同时，为了更精确地测试SM和探测高能对撞机上的新物理效应，对电子战部门的进展来说，对部分子分布的改进是必要的。

项目成果

Resummation of high order corrections in Z boson plus jet production at the LHC

• DOI: 10.1103/physrevd.100.054032
• 发表时间: 2018-10
• 期刊: Physical Review D
• 影响因子: 5
• 作者: P. Sun;B. Yan;C. Yuan;F. Yuan

Nonperturbative functions for SIDIS and Drell–Yan processes

• DOI: 10.1142/s0217751x18410063
• 发表时间: 2018-04
• 期刊: International Journal of Modern Physics A
• 影响因子: 1.6
• 作者: P. Sun;J. Isaacson;C. Yuan;F. Yuan

New CTEQ global analysis with high precision data from the LHC

利用 LHC 的高精度数据进行新的 CTEQ 全局分析

• DOI: 10.22323/1.352.0001
• 发表时间: 2019
• 期刊: Proceedings of science
• 作者: Yuan, C. P.;Hou, Tie-Jiun;Xie, Keping;Jun, Gao;Dulat, Sayipjamal;Guzzi, Marco;Hobbs, Timothy J.;Huston, Joey Walter;Nadolsky, Pavel;Pumplin, Jon
• 通讯作者: Pumplin, Jon

Transverse momentum resummation for s -channel single top quark production at the LHC

LHC 中 s 通道单顶夸克产生的横向动量恢复

• DOI: 10.1103/physrevd.99.034008
• 发表时间: 2019
• 期刊: Physical Review D
• 影响因子: 5
• 作者: Sun, Peng;Yan, Bin;Yuan, C.-P.
• 通讯作者: Yuan, C.-P.

Updating and optimizing error parton distribution function sets in the Hessian approach. II.

• DOI: 10.1103/physrevd.100.114024
• 发表时间: 2019-12
• 期刊: Physical Review D
• 影响因子: 5
• 作者: T. Hou;Zhite Yu;S. Dulat;C. Schmidt;C. Yuan