The Hadron Spectrum using Lattice QCD Simulations with Extended Interpolating Operators

使用带有扩展插值算子的晶格 QCD 模拟的强子谱

• 批准号: 0510020
• 负责人: Colin Morningstar
• 金额: $ 36万
• 依托单位: Carnegie-Mellon University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-11-01 至 2010-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0510020&HistoricalAwards=false
• 关键词: Hadron; Spectrum; using; Lattice; QCD

Abstract for PHY-0510020 PI: Colin Morginstar Institution: Carnegie Mellon The hadron spectrum using lattice QCD simulations with extended interpolating operators? The objective of this proposal is to calculate the mass spectrum of light- and heavy-quark conventional and hybrid mesons and baryons, such as the NO excitations, doubly-charmed baryons, and pentaquark states using Monte Carlo methods with large sets of well-designed operators. Such calculations are certainly challenging: determinations of large correlation matrices will be required, the identification of the spin of the hadrons must be carefully done by matching patterns of degeneracies across different irreducible representations of the symmetry group of the lattice, the inclusion of quark loops in the Monte Carlo updating is crucial, careful studies of finite-volume and discretization effects will be needed, and the incorporation of multihadron operators will be important for extracting the higher-lying resonances. However, the use of powerful variational techniques and the availability of unprecedented computing hardware and software through the DOE's Scientific Discoveries through Advanced Computing initiative, makes such calculations possible for the first time. These studies are important for extending our understanding of the most fundamental basis of our physical world and of the origins of our Universe. Algorithmic ideas are likely to have applications in other computational fields. This activity will promote the development of young scientists trained in computational skills. Outreach will be accomplished through articles in popular publications and by posting results with simplified background information on publicly accessible web pages.

摘要PHY-0510020 PI：科林Morginstar机构：卡内基梅隆强子谱使用格点QCD模拟与扩展插值算子？这个计划的目标是用蒙特卡罗方法和大量精心设计的算符计算轻夸克和重夸克的常规和混合介子和重子的质量谱，例如NO激发，双粲重子和五夸克态。这样的计算无疑具有挑战性：需要确定大的相关矩阵，必须通过匹配晶格对称群的不同不可约表示的简并模式来仔细识别强子的自旋，在Monte Carlo更新中包含夸克环是至关重要的，需要仔细研究有限体积和离散化效应，而多强子算符的引入对于提取更高的共振态是很重要的。然而，强大的变分技术的使用和前所未有的计算硬件和软件的可用性，通过能源部的科学发现通过先进的计算计划，使这种计算第一次成为可能。这些研究对于扩展我们对物理世界和宇宙起源的最基本基础的理解非常重要。数学思想很可能在其他计算领域得到应用。这项活动将促进受过计算技能培训的青年科学家的发展。外联工作将通过在大众出版物上发表文章和在可公开查阅的网页上张贴附有简化背景资料的结果来完成。