Topics in Theoretical Physics

理论物理专题

• 批准号: 9306141
• 负责人: Marc Sher
• 金额: $ 18.6万
• 依托单位: College of William and Mary
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-07-15 至 1996-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9306141&HistoricalAwards=false
• 关键词: Topics; Theoretical; Physics

9306141 Sher An important prediction of the theory of strong interactions (QCD) is the existence of glueballs--strongly interacting particles without quarks. The production rates of various types of glueballs at high momentum transfer will be calculated. Another QCD prediction concerns the decays of heavy quark-light quark bound states; all potentially observable two body decays of such systems will be investigated. It has been known for some time that quarks and leptons come in families, and it is known that there are only three light neutrino's; thus the neutrino of a fourth family must be very heavy. As a result, the charged lepton of the fourth family might be very long-lived, with lifetimes ranging from nanoseconds to years. The phenomenological implications of such long-lived leptons will be studied in detail, and the other implications of models which contain such leptons will be studied. Finally, high precision electroweak studies require better knowledge of the cross-section for electron-positron scattering in the 1-9 GeV energy range, and the possibilities of CEBAF making such a measurement in the future will be investigated. e proven leadership than Harris in terms of representing LBL. If RHIC representation is most important, followed by institutional representation, Nagamiya would be a stronger choice than Harris. Moniz would much prefer a smaller and wiser committee than is presently constituted. He felt that many of the recent committee did not perform to the level that one should expect of NSAC. r; 7 r4 F(} ~ t F M F F& F t i M M F SQRV f N; F u| t ^{ t ! ! A ( Times New Roman Symbol & Arial " h / terri l. hicks terri l. hicks

9306141她对强相互作用理论(QCD)的一个重要预言是胶球的存在--没有夸克的强相互作用粒子。将计算各种类型胶球在高动量转移时的产生率。另一个QCD预测涉及重夸克-轻夸克束缚态的衰变；这类系统的所有潜在可观测的两体衰变都将被研究。夸克和轻子是以家族的形式存在的，这已经知道一段时间了，而且我们知道只有三个轻中微子，因此第四个家族的中微子一定很重。因此，第四个家族的带电轻子可能寿命非常长，寿命从纳秒到数年不等。我们将详细研究这种长寿命轻子的现象学含义，并研究包含这种轻子的模型的其他含义。最后，高精度的电弱研究需要更好地了解电子-正电子在1-9GeV能量范围内的散射截面，并将研究CEBAF在未来进行此类测量的可能性。在代表LBL方面，E比哈里斯更具证明的领导力。如果最重要的是RHIC代表制，其次是机构代表制，名宫将是比哈里斯更强的选择。莫尼兹更喜欢一个比目前组成的委员会更小、更明智的委员会。他认为，最近的许多委员会的表现没有达到人们对NSAC应有的预期水平。R；7 R4 F(}~t F M F&amp；F t I M M F SQRV f N；F u|t^{t！！A(Times新罗马符号&amp；Arial“h/Terri L.Hicks Terri L.Hicks