Standard Model Predictions for Physics at High Energy Colliders

高能对撞机物理学的标准模型预测

• 批准号: 8713231
• 负责人: Richard Gonsalves
• 金额: $ 3.69万
• 依托单位: SUNY at Buffalo
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-12-01 至 1991-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8713231&HistoricalAwards=false
• 关键词: Standard; Model; Predictions; Physics; Energy

The Standard Model describes elementary particle interactions in terms of gauge theories: Quantumchromodynamics (QCD) for the strong interactions and the Glashow-Weinberg- Salam agreement with experiment. However, it does not naturally explain the particle mass spectrum, the breaking of electroweak gauge symmetry, or the different strengths of the QCD and GWS couplings: these deficiencies strongly indicate the existence of a Higgs particle and possible new interactions at energies which will become available in the near future. Perturbation theory, a power series expansion, may be used to study QCD at high energies. However, the expansion parameter is not small and higher-order corrections are substantial. These corrections will be computed for various lepton and hadron reactions to obtain reliable predictions of cross section normalizations, and transverse momentum and other distributions. These predictions will allow for more precise tests of QCD; they will aid in studying non-perturbative effects due to strong quark-gluon forces in initial-state hadrons and in hadron jets; and they will facilitate unambiguous identification of signals of the electroweak and possible new interactions. Production of GWS gauge bosons and of the Higgs boson will be studied: signals will be compared with QCD backgrounds, and unusual signals which exhibit properties, such as parity-violation, that are not shared by the background will be identified. These results, to be obtained by a very highly-regarded and capable elementary particle theorist, will enable precision tests of the Standard Model to be made at accelerators presently in operation or under construction, and will aid in the design and execution of experiments searching for new particles and interactions at future super colliders.

标准模型用规范理论描述基本粒子的相互作用：强相互作用的量子色动力学（QCD）和与实验相符的glashowweinberg Salam协议。然而，它并不能自然地解释粒子的质量谱，电弱规范对称的破坏，或者QCD和GWS耦合的不同强度：这些缺陷强烈表明希格斯粒子的存在，以及在不久的将来可能出现的能量上的新相互作用。微扰理论是一种幂级数展开，可以用来研究高能的QCD。然而，膨胀参数并不小，高阶修正是实质性的。这些修正将计算各种轻子和强子反应，以获得截面归一化、横向动量和其他分布的可靠预测。这些预测将允许对QCD进行更精确的测试；它们将有助于研究初始态强子和强子射流中由强夸克-胶子力引起的非微扰效应；它们将有助于明确识别电弱和可能的新相互作用的信号。GWS规范玻色子和希格斯玻色子的产生将被研究：信号将与QCD背景进行比较，而那些表现出诸如奇偶违逆等不被背景共享的特性的不寻常信号将被识别出来。这些结果将由一位非常有名望和能力的基本粒子理论家获得，将使标准模型的精确测试能够在目前正在运行或正在建设的加速器上进行，并将有助于设计和执行在未来的超级对撞机上寻找新粒子和相互作用的实验。