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Research in Strong-Interaction Theory

强相互作用理论研究

基本信息

批准号：
1614460
负责人：
Richard Furnstahl
金额：
$ 63万
依托单位：
Ohio State University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2016
资助国家：
美国
起止时间：
2016-09-01 至 2020-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1614460&HistoricalAwards=false
关键词：
Research Strong Interaction Theory

项目摘要

The strong interaction is responsible for the binding of protons and neutrons into atomic nuclei. Improved quantitative understanding of how this happens is essential not only for fundamental nuclear research at US experimental facilities but for progress in astrophysics, for experiments on the nature of neutrinos, and for applications to energy and homeland security. An era of precision calculations of nuclear structure and reactions is underway, enabled in part by research results from previous NSF grants to the PIs. Tools and diagnostics that have been developed will be applied to confront a range of issues raised by this progress. These issues include improving the description of forces and other inputs for microscopic calculations of nuclei, applying new methods to assess the theoretical uncertainties, and improving the extraction of information from experiment that minimally depends on model assumptions. The training received by undergraduates, graduate students, and postdoctoral research associates in carrying out the proposed activities contributes directly to the building of a diverse scientific workforce. The mix of analytical and numerical computation thethe students and postdocs must employ is excellent preparation for both academic and industrial research, which is validated by the strong track record of past members of the group. Particular issues to be addressed by this project include robust uncertainty quantification, parameter estimation for effective field theory (EFT), consistent operators for EFT and renormalization group (RG) methods, understanding regulator artifacts, formulating many-body power counting, explicating the role of high-momentum/short-distance physics (including short-range correlations), and extracting process-independent quantities from experiment. Projects will apply to inter-nucleon interactions, few-body and many-body systems, and electroweak probes. Specific tools to be used include Bayesian statistical methods for EFT, basis extrapolation methods, analysis of many-body contributions, contact (pionless) EFT, and similarity RG (SRG) evolution. These tools provide interconnections in attacking issues and extending applications; they will continue to be developed and will be made widely available. The target applications include Bayesian parameter estimation and model selection for hadronic and nuclear problems, new SRG generators to address the growth of many-body operators, consistent knock-out reactions for few-body systems, and the use of pionless EFT to study operator evolution and assess perturbative versus non-perturbative approaches. These all contribute to the goal of model independent, microscopic calculations of nuclei. The projects will impact forefront problems in low-energy nuclear physics such as the physics of nuclei far from stability, which is relevant for astrophysics and the upcoming Facility for Rare Isotope Beams (FRIB), and at Jefferson Laboratory.

强相互作用是质子和中子结合成原子核的原因。改进对这种情况如何发生的定量理解不仅对美国实验设施的基础核研究至关重要，而且对天体物理学的进步，中微子性质的实验以及能源和国土安全的应用也至关重要。一个精确计算核结构和反应的时代正在进行中，部分原因是美国国家科学基金会以前向PI赠款的研究成果。已经开发的工具和诊断方法将用于应对这一进展提出的一系列问题。这些问题包括改进力的描述和其他输入的微观计算的核，应用新的方法来评估理论的不确定性，并改善信息的提取实验，最小限度地依赖于模型假设。本科生、研究生和博士后研究人员在开展拟议活动时接受的培训直接有助于建设一支多样化的科学工作队伍。学生和博士后必须采用的分析和数值计算的混合是学术和工业研究的良好准备，这是由该集团过去成员的良好记录所证实的。该项目要解决的特定问题包括鲁棒不确定性量化，有效场论（EFT）的参数估计，EFT和重整化群（RG）方法的一致性算子，理解调节器伪影，制定多体功率计数，阐明高动量/短程物理（包括短程相关）的作用，并从实验中提取与过程无关的量。项目将适用于核子间的相互作用，少体和多体系统，和电弱探针。具体使用的工具包括贝叶斯统计方法的EFT，基础外推方法，分析多体的贡献，接触（pionless）EFT，和相似性RG（SRG）的演变。这些工具在解决问题和扩大应用方面提供了相互联系;它们将继续得到开发，并将广泛提供。目标应用包括强子和核问题的贝叶斯参数估计和模型选择，新的SRG发电机，以解决多体运营商的增长，少体系统的一致性敲除反应，以及使用无介子EFT研究运营商的演变和评估微扰与非微扰方法。这些都有助于实现与模型无关的原子核微观计算的目标。这些项目将影响低能核物理学的前沿问题，例如远离稳定的核物理学，这与天体物理学和即将到来的稀有同位素束设施（FRIB）以及杰斐逊实验室有关。

项目成果

期刊论文数量（4）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Quantifying correlated truncation errors in effective field theory

量化有效场理论中的相关截断误差

DOI：
10.1103/physrevc.100.044001
发表时间：
2019
期刊：
Physical Review C
影响因子：
3.1
作者：
Melendez, J. A.;Furnstahl, R. J.;Phillips, D. R.;Pratola, M. T.;Wesolowski, S.
通讯作者：
Wesolowski, S.

Extracting free-space observables from trapped interacting clusters

从捕获的相互作用簇中提取自由空间可观测量