RUI: Studies of Heavy Quarkonium Spectroscopy with Belle and Belle II

RUI：用 Belle 和 Belle II 进行重夸克离子光谱研究

• 批准号: 2111604
• 负责人: Todd Pedlar
• 金额: $ 15万
• 依托单位: Luther College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-07-15 至 2024-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2111604&HistoricalAwards=false
• 关键词: RUI; Studies; Heavy; Quarkonium; Spectroscopy

One of the big mysteries in high energy physics today is why the universe is almost entirely made of matter and not antimatter. This matter/antimatter asymmetry could be explained by understanding the different reactions of particles and antiparticles in particle accelerator experiments. This award will study these differences in particles created at the Belle and Belle-II experiments at the High Energy Accelerator Research Organization (KEK) laboratory in Japan. This facility creates particles called mesons consisting of quark-antiquark pairs. By studying these mesons, one can probe for Beyond the Standard Model fundamental physics processes such as particle – antiparticle transitions, rare meson decays and possible exotic particles which could indicate the presence of Dark Matter. Differences in these transitions could indicate why matter dominates over antimatter in the universe.The Belle II Experiment at KEK in Japan has the world's largest data samples recorded at the bottomonium resonances in the mass range of 10 GeV, the so-called Upsilon resonances. At these resonant energies the electron positron beam particles have a much higher probability of producing B mesons, allowing experimenters to acquire large statistics and observe rare phenomena. The central aim of this RUI program of research by the Luther College group is to study the spectroscopy of bottomonium and related states, with a focus on resonant states that probe the limits of our understanding of Quantum Chromodynamics (QCD) and improving the theoretical understanding in lattice QCD (the techniques used to make computer predictions of QCD calculations). The Luther College program provides an unusual opportunity for undergraduate students to become meaningfully involved in a world-leading experiment, taking part in every aspect of Belle data analysis, and in the development of software tools for the upgraded experiment, Belle II. The broader impacts of the program are exemplary, fostering greater exposure to scientific research among students and teachers in rural Northeast Iowa, through masterclasses for High School students and now involvement of Belle-II STEM classes in the Dorian Music camp program in Iowa.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.

今天高能物理学中的一大谜团是，为什么宇宙几乎完全由物质而不是反物质组成。这种物质/反物质的不对称性可以通过理解粒子和反粒子在粒子加速器实验中的不同反应来解释。该奖项将研究在日本高能加速器研究组织(KEK)实验室的Belle和Belle-II实验中产生的粒子的这些差异。这个设备创造了由夸克-反夸克对组成的被称为介子的粒子。通过研究这些介子，人们可以探索超越标准模型的基本物理过程，如粒子-反粒子跃迁，稀有介子衰变，以及可能指示暗物质存在的奇异粒子。这些跃迁的差异可能表明为什么物质在宇宙中占主导地位。日本KEK的Belle II实验拥有世界上最大的数据样本，记录了10GeV质量范围内的底层离子共振，即所谓的Upsilon共振。在这些共振能量下，电子正电子束粒子产生B介子的几率要高得多，这使得实验人员能够获得大量的统计数据并观察到罕见的现象。路德学院研究小组的这项RUI计划的中心目标是研究底层分子和相关状态的光谱，重点是探索我们对量子色动力学(QCD)理解的极限的共振态，并提高对晶格QCD(用于对QCD计算进行计算机预测的技术)的理论理解。路德学院的计划为本科生提供了一个不同寻常的机会，让他们有意义地参与世界领先的实验，参与Belle数据分析的方方面面，并为升级后的实验Belle II开发软件工具。该计划的更广泛的影响堪称典范，通过为高中生开设的大师班，以及现在爱荷华州多里安音乐夏令营计划的Belle-II STEM课程，培养了更多的爱荷华州农村学生和教师接触科学研究。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。