Search for New Phenomena at the Energy Frontier

寻找能源前沿新现象

• 批准号: 1506173
• 负责人: Dhiman Chakraborty
• 金额: $ 51万
• 依托单位: Northern Illinois University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-08-01 至 2019-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1506173&HistoricalAwards=false
• 关键词: Search; New; Phenomena; Energy; Frontier

The objective of this project is to search for physics that does not have an explanation in the Standard Model (SM), the theory that describes the properties of the elementary particles making up the known matter in the universe. The work will be done using the ATLAS multi-particle detector at the Large Hadron Collider (LHC) at CERN, the European particle physics laboratory in Switzerland. In 2012 the Higgs boson (H) was discovered at the LHC by both ATLAS and CMS, another large detector at LHC. The Higgs boson was the last particle predicted to exist by the SM. In this project the PI and his group of scientists will use the LHC running at almost twice the energy achieved in 2012, 13 teraelectron volts (TeV) as opposed to 7.5 (TeV). The group will look for events in which an H decays to a fermion anti-fermion pair. (A fermion is an elementary particle that has a half-integer value of the fundamental property of all elementary particles known as spin. An electron, for example, is a fermion.) Details of such decays, such as the frequency with which they occur, can reveal whether or not other Higgs-like particles, predicted in various extensions of the SM, exist. The increased energy will also allow the group to search for further, more massive Higgs-like states. The award will support one PI, a postdoctoral fellow and a graduate student. The group will collect and analyze events from run II of the LHC, which begins in the summer of 2015 and continues through the end of 2017.The group will also play a role in the maintenance of the ATLAS tiled calorimeter system and the Fast TracKer trigger (FTK, part of the planned upgrade of the ATLAS detector designed to rapidly reconstruct data from the silicon-based charged particle detector system). Their analysis focus will be in the study of Higgs couplings to ff where the Fermions are from the 3rd generation (t, b, tau-nu).

该项目的目标是寻找在标准模型（SM）中没有解释的物理学，该理论描述了构成宇宙中已知物质的基本粒子的性质。 这项工作将在位于瑞士的欧洲粒子物理实验室CERN的大型强子对撞机（LHC）上使用ATLAS多粒子探测器进行。 2012年，Higgs玻色子（H）在LHC被ATLAS和CMS发现，CMS是LHC的另一个大型探测器。 希格斯玻色子是SM预测存在的最后一种粒子。 在这个项目中，PI和他的科学家团队将使用LHC，其能量几乎是2012年的两倍，13太电子伏特（TeV），而不是7.5（TeV）。 该小组将寻找H衰变为费米子反费米子对的事件。 （费米子是一种基本粒子，它具有所有基本粒子的基本属性的半整数值，称为自旋。例如，电子就是费米子。） 这种衰变的细节，比如它们发生的频率，可以揭示在SM的各种扩展中预测的其他希格斯粒子是否存在。 增加的能量也将使该小组能够寻找更远、更大质量的希格斯状态。 该奖项将支持一名PI，一名博士后研究员和一名研究生。 该小组将收集和分析从2015年夏季开始并持续到2017年底的LHC运行II的事件。该小组还将在ATLAS平铺量热计系统和Fast TracKer触发器（FTK，ATLAS探测器计划升级的一部分，旨在快速重建硅基带电粒子探测器系统的数据）的维护中发挥作用。 他们的分析重点将是希格斯耦合到ff的研究，其中费米子来自第三代（t，B，tau-nu）。