RUI: Hadronic Structure from Spin Observables in pQCD

RUI：pQCD 中自旋可观测值的强子结构

基本信息

批准号：
2011763
负责人：
Daniel Pitonyak
金额：
$ 16.49万
依托单位：
Lebanon Valley College
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-08-15 至 2024-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2011763&HistoricalAwards=false
关键词：
RUI Hadronic Structure Spin Observables

项目摘要

The nucleus of an atom is made up of protons and neutrons, which are a part of a broader category of particles called hadrons. However, these hadrons are not a fundamental form of matter since they are composed of other particles, namely, quarks and gluons (collectively called partons). The partons form a dynamical system inside of hadrons that is governed by the strong nuclear force. A goal of nuclear physics research is to understand this internal structure through the interactions of these partons, the elementary pieces of visible matter. In particular, the analysis of high-energy collisions sensitive to an intrinsic property, called spin, of hadrons and/or partons is especially useful. These observables allow us to explore the 3-dimensional motion of partons inside of hadrons and how the proton's spin arises from its constituent partons. This research will give us better insight into these aspects of hadronic structure as well as support the science of the future Electron-Ion Collider to be built in the United States. Undergraduate students will be included in substantive parts of the project in order to foster the interests of young scientists in the subfield of nuclear physics and train them for future careers in research. This research project will further our knowledge of observables sensitive to parton intrinsic transverse motion and correlations, which allow for a 3-dimensional imaging of hadrons in momentum space. This includes performing a global analysis of data from various experiments sensitive to the spin of hadrons in order to extract the relevant functions, using an iterative Monte Carlo routine, that encode their internal structure. These functions will then be used to make predictions for upcoming measurements at the Relativistic Heavy Ion Collider (RHIC), Jefferson Lab's 12-GeV upgrade (JLab-12), and a future Electron-Ion Collider (EIC). Since a rigorous theoretical formalism is needed in order to interpret such experimental data, this project will also solidify the framework used in spin observables through higher-order calculations within quantum chromodynamics (QCD). The project will lastly investigate certain aspects of how the proton spin arises from its constituent partons by analyzing how much of this spin is due to partons that carry only a small fraction of the proton's momentum. The study will incorporate first principle results as input to the extraction of partonic functions that can be used to calculate their spin in this region.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

原子的核由质子和中子组成，质子和中子是更广泛的颗粒类别的一部分，称为Hadron。但是，这些哈德子不是物质的基本形式，因为它们由其他颗粒组成，即夸克和胶子（统称为partons）。帕顿形成了由强核力量支配的哈德子内部动力系统。核物理学研究的一个目标是通过这些部分的相互作用，即可见的物质来理解这种内部结构。特别是，对Hadron和/或Partons的固有特性敏感的高能碰撞分析特别有用。这些可观察到的物品使我们能够探索黑龙内部的partons的三维运动，以及质子的旋转是如何源自其组成部分的。这项研究将使我们能够更好地了解Hadronic结构的这些方面，并支持在美国建造的未来电子离子对撞机的科学。本科生将被纳入项目的实质性部分，以促进核物理学子领域的年轻科学家的利益，并培训他们从事研究的未来职业。该研究项目将进一步了解对Parton固有的横向运动和相关性敏感的可观察到的知识，从而可以在动量空间中对Hadron进行3维成像。这包括对对Hadron的旋转敏感的各种实验的数据进行全局分析，以便使用迭代的蒙特卡洛例程提取相关功能，该功能编码其内部结构。然后，这些功能将用于对相对论重离子对撞机（RHIC），杰斐逊实验室的12-GEV升级（JLAB-12）和未来电子离子碰撞器（EIC）的测量进行预测。由于需要严格的理论形式主义才能解释此类实验数据，因此该项目还将通过量子染色体动力学（QCD）中的高阶计算来巩固旋转可观察物中使用的框架。该项目将最后研究质子旋转如何由其组成部分产生的某些方面，通过分析仅携带质子动量的一小部分的部分旋转所致。该研究将将第一原则结果纳入党派功能的提取，可用于计算其在该地区的旋转。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子和更广泛影响的审查标准的评估来获得支持的。

项目成果

期刊论文数量（18）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

The Present and Future of QCD

DOI：
10.1016/j.nuclphysa.2024.122874
发表时间：
2023-03
期刊：
Nuclear Physics A
影响因子：
1.4
作者：
P. Achenbach;D. Adhikari;A. Afanasev;F. Afzal;C. Aidala;A. Al-bataineh;D. Almaalol;M. Amaryan
通讯作者：
P. Achenbach;D. Adhikari;A. Afanasev;F. Afzal;C. Aidala;A. Al-bataineh;D. Almaalol;M. Amaryan

Tomography of pions and protons via transverse momentum dependent distributions

通过横向动量相关分布对介子和质子进行断层扫描

DOI：
10.1103/physrevd.108.l091504
发表时间：
2023
期刊：
Physical Review D
影响因子：
5
作者：
Barry, P. C.;Gamberg, L.;Melnitchouk, W.;Moffat, E.;Pitonyak, D.;Prokudin, A.;Sato, N.
通讯作者：
Sato, N.

Number Density Interpretation of Dihadron Fragmentation Functions

双强子碎裂函数的数密度解释

DOI：
10.1103/physrevlett.132.011902
发表时间：
2024
期刊：
Physical Review Letters
影响因子：
8.6
作者：
Pitonyak, D.;Cocuzza, C.;Metz, A.;Prokudin, A.;Sato, N.
通讯作者：
Sato, N.

Origin of single transverse-spin asymmetries in high-energy collisions

DOI：
10.1103/physrevd.102.054002
发表时间：
2020-02
期刊：
Physical Review D
影响因子：
5
作者：
Justin Cammarota;L. Gamberg;Z. Kang;Joshua A. Miller;D. Pitonyak;A. Prokudin;T. Rogers;N. Sato
通讯作者：
Justin Cammarota;L. Gamberg;Z. Kang;Joshua A. Miller;D. Pitonyak;A. Prokudin;T. Rogers;N. Sato

Electron-ion collider impact study on the tensor charge of the nucleon