RUI: Studies of Heavy Quarkonium Spectroscopy

从1979年到2008年，CESR碰撞电子束和正电子束，产生由CLEO探测器观察到的粒子喷雾。CESR和CLEO一起揭示了底夸克、魅夸克和τ轻子的重要性质。最后几年的运作是致力于在一个名为CLEO-c的计划中的魅力夸克。CLEO-c的数据，现在正在分析中，进一步深入研究了魅力夸克的奥秘，并提供了关于强作用力的重要新信息，强作用力结合质子和中子并控制夸克的行为。与此同时，LEPP理论家正在开发计算强作用力现象的新技术。有些人使用所谓的格点规范理论技术将计算机的力量应用于强相互作用，而另一些人则寻求将不同的强相互作用过程联系起来的模式。本研究员建议利用康奈尔大学CLEO实验收集的数据进行粲鎓和底鎓光谱学的研究。这些测量对于理解强相互作用很重要。调查员长期参与了CLEO实验。现在他已经搬到了爱荷华州的路德学院，他建议继续他的工作，在本科生的参与下分析CLEO-c数据。研究人员是粲偶素和底偶素物理领域的专家，因此结合他与实验的长期联系，可以成功地进行数据分析。所提出的粲谱测量方案以及与在B工厂发现的XYZ态的联系是有充分动机的，CLEO-c数据很可能在这一领域产生独特的信息。研究者提出的夸克偶素态的研究对于理解强相互作用和推进粒子物理学知识的发展具有重要意义。提案中概述的数据分析计划为本科生参与四年制大学的研究提供了绝佳的机会。Marvin Goldberg POMPS/PHY/EPP

From 1979 to 2008 CESR collided electron and positron beams, producing a spray of particles observed by the CLEO detector. Together, CESR and CLEO revealed the important properties of the bottom and charm quarks and the tau lepton. The last years of operation were dedicated to the charm quark in a program known as CLEO-c. The CLEO-c data, now under analysis, delve further into the mysteries of the charm quark, and provide important new information about the strong force, which binds protons and neutrons and governs quark behavior. In parallel, LEPP theorists are developing new techniques for calculating strong force phenomena. Some apply the power of computers to the strong force using so-called lattice gauge theory techniques, while others seek patterns that relate disparate strong interaction processes. This investigator proposes to carry out studies of charmonium and bottomonium spectroscopy with the data collected with the CLEO experiment at Cornell. These measurements are important to the understanding of strong interactions. The investigator has had a long and important involvement in the CLEO experiment. Having now moved to Luther College in Iowa, he proposes to continue his work on the analysis of the CLEO-c data, with the involvement of undergraduate students. The investigator is an expert in the area of charmonium and bottomonium physics, hence combined with his long term connection with the experiment is well positioned to carry out a successful program of analysis of the data. The proposed program of measurements of charmonium spectra and the connection with the XYZ states found at the B factories is well motivated and the CLEO-c data is likely to yield unique information in this area. The study of quarkonium states proposed by the investigator is important to the understanding of strong interactions and to the advancement of knowledge of particle physics. The data analysis plan outlined in the proposal provides an excellent opportunity for the involvement of undergraduates in research at a 4-year college.Marvin GoldbergPOMPS/PHY/EPP