New Directions in High Energy Nuclear Physics

高能核物理新方向

• 批准号: 1812431
• 负责人: Rainer Fries
• 金额: $ 29.89万
• 依托单位: Texas A&M University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-07-01 至 2022-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1812431&HistoricalAwards=false
• 关键词: New; Directions; Energy; Nuclear; Physics

Among the four fundamental forces in nature the strong nuclear force stands out for being the least understood one. It drives many processes in the universe that are crucial for our existence. One particularly important aspect of the strong nuclear force is the existence of quark gluon plasma. If ordinary matter is heated up to temperatures of about 1,000,000,000,000 degrees, hotter than the core of the sun, atoms and molecules cease to exist and even protons and neutrons inside atomic nuclei melt. The remaining primordial soup of quarks and gluons filled the very early universe. We can recreate quark gluon plasma in our largest particle colliders by smashing heavy nuclei into each other. Experimental programs at the Large Hadron Collider in Europe and the Relativistic Heavy Ion Collider in the USA study the properties of quark gluon plasma. This project will support research that will improve our understanding of the formation and properties of quark gluon plasma in nuclear collisions. The PI and his collaborators will use computer simulations and advanced statistical methods to reach this goal. Funding is provided to support training for a graduate students and junior scientists in nuclear science.Quark gluon plasma in nuclear collisions emerges from the highly complex gluon fields that are initially created in nuclear collisions. The PI and his group will investigate these fields and their properties by studying how angular momentum of the droplets of quark gluon plasma is related to the initial angular momentum of the colliding nuclei. The same gluon fields will also be studied through their interaction with fast quarks. The PI and his group will be able to use the JETSCAPE framework for large scale computational simulations of nuclear collisions. They will study various aspects of jets and heavy quarks being quenched in quark gluon plasma. They will then extract properties of quark gluon plasma using multiple constraints. For example, the strength of quenching of quarks and heavy quarks, and the viscosity of quark gluon plasma can be independently measured and are mutually related. Testing these relations will be an important step towards a deeper understanding of the dynamics of quark gluon plasma. The PI and his group will also use advanced statistical methods and machine learning applied to data to understand the mechanisms of hadron formation from quarks and gluons. These results will be used to improve the state-of-the-art modeling of the hadronization process that is a crucial input to many calculations.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.

在自然界中的四个基本力量中，强大的核力量是最不了解的核力量。它驱动宇宙中的许多过程对我们的存在至关重要。强大核力量的一个特别重要的方面是存在夸克gluon等离子体。如果将普通物质加热到约1,000,000,000度的温度，比太阳的核心更热，原子和分子不再存在，甚至原子核内部的质子和中子甚至都不存在。其余的夸克和胶子的原始汤充满了早期的宇宙。我们可以通过将沉重的核相互粉碎到彼此中，从而在我们最大的粒子山脉中重新创建夸克gluon等离子体。欧洲大型强子对撞机的实验程序和美国的相对论重离子对撞机研究了夸克·格鲁恩血浆的性质。该项目将支持我们对核碰撞中夸克gluon等离子体的形成和特性的理解的研究。 PI和他的合作者将使用计算机模拟和高级统计方法来实现此目标。提供了资金来支持核科学研究生和初级科学家的培训。核碰撞中的Quark Gluon等离子体来自最初在核碰撞中创建的高度复杂的Gluon领域。 PI和他的小组将通过研究Quark Gluon血浆液滴的角动量如何与碰撞核的初始角动量相关，来研究这些领域及其性质。通过与快速夸克的互动，还将研究相同的Gluon场。 PI和他的小组将能够使用Jetscape框架进行大规模的核碰撞计算模拟。他们将研究喷气机和重夸克的各个方面。然后，他们将使用多个约束来提取夸克gluon等离子体的特性。例如，可以独立测量并相互关联的夸克和重夸克的强度​​以及夸克gluon等离子体的粘度。测试这些关系将是对夸克gluon等离子体动态的更深入理解的重要一步。 PI和他的小组还将使用应用于数据的高级统计方法和机器学习，以了解夸克和胶子的强子形成机制。这些结果将用于改善对许多计算的关键意见的强环化过程的最新建模。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评估评估标准的评估值得支持的。

项目成果

Multisystem Bayesian constraints on the transport coefficients of QCD matter

• DOI: 10.1103/physrevc.103.054904
• 发表时间: 2020-11
• 期刊: arXiv: High Energy Physics - Phenomenology
• 作者: D. Everett;W. Ke;J. Paquet;G. Vujanovic;S. Bass;L. Du;C. Gale;M. Heffernan;U. Heinz

JETSCAPE framework: p+p results

• DOI: 10.1103/physrevc.102.054906
• 发表时间: 2019-10
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: A. Kumar;Y. Tachibana;D. Pablos;C. Sirimanna;R. Fries;A. Angerami;S. Bass;S. Cao;Y. Chen;J. Coleman;L. Cunqueiro;T. Dai;L. Du;H. Elfner;D. Everett;W. Fan;C. Gale;Y. He;U. Heinz;B. Jacak;P. Jacobs;15 S. Jeon;K. Kauder;W. Ke;E. Khalaj;M. Kordell;T. Luo;A. Majumder;M. McNelis;J. Mulligan;C. Nattrass;D. Oliinychenko;L. Pang;C. Park;J. Paquet;J. Putschke;G. Roland;B. Schenke;L. Schwiebert;C. Shen;R. Soltz;G. Vujanovic;X.-N. Wang;R. Wolpert;Y. Xu;Z. Yang

Determining the jet transport coefficient q̂ from inclusive hadron suppression measurements using Bayesian parameter estimation

• DOI: 10.1103/physrevc.104.024905
• 发表时间: 2021-02
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: S. Cao;Y. Chen;J. Coleman-;J. Mulligan;P. Jacobs;R. Soltz;A. Angerami;R. Arora;S. Bass

Angular momentum eigenstates of the isotropic 3-D harmonic oscillator: Phase-space distributions and coalescence probabilities

• DOI: 10.1016/j.aop.2022.168960
• 发表时间: 2021-12
• 期刊: Annals of Physics
• 影响因子: 3
• 作者: Michael Kordell II;R. Fries;C. Ko

QCD challenges from pp to A–A collisions

• DOI: 10.1140/epja/s10050-020-00270-1
• 发表时间: 2020-03
• 期刊: The European Physical Journal A
• 作者: J. Adolfsson;A. Andronic;C. Bierlich;C. Bierlich;P. Bożek;Smita Chakraborty;P. Christiansen;D. Chinellato;R. Fries;G. Gustafson;H. Hees;P. Jacobs;D. Kim;L. Lönnblad;M. Mace;M. Mace;O. Matonoha;A. Mazeliauskas;A. Mazeliauskas;A. Morsch;A. Nassirpour;A. Ohlson;A. Ortiz;A. Oskarsson;I. Otterlund;G. Paic;D. Perepelitsa;C. Plumberg;R. Preghenella;R. Rapp;C. Rasmussen;A. Rossi;O. V. Rueda;A. Silva;D. Silvermyr;A. Timmins;T. Sjöstrand;R. Törnkvist;M. Utheim;V. Vislavicius;U. Wiedemann;K. Zapp;W. Zhao