Exploring Electroweak Symmetry Breaking at the LHC with ATLAS's Fast TracKer

利用 ATLAS 的 Fast Tracker 探索 LHC 的电弱对称破缺

• 批准号: 1509795
• 负责人: Lauren Tompkins
• 金额: $ 10.17万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-08-01 至 2016-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1509795&HistoricalAwards=false
• 关键词: Exploring; Electroweak; Symmetry; Breaking; LHC

This award supports a project that is part of a search for physics that does not have an explanation in the Standard Model (SM), the theory that describes the elementary particles making up the known visible matter in the universe. This 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 another large detector. The H was the last particle predicted to exist by the SM. Its discovery was one of the goals for the LHC. In this project, the PI and her small group of scientists will use the LHC running at twice the energy (13 TeV) achieved in 2012. They will look for events in which an H decays to a b anti-b quark pair (bb). The 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 them to search for further, more massive Higgs-like states. She and her group will also play a role in the planned upgrade of the ATLAS detector itself. They will work on the development and use of a device that very rapidly reconstructs data from silicon-based devices that map out the paths of charged particles passing through them. This proposal will support one PI, a postdoctoral fellow and a graduate student. This 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 LHC will be run at 13 TeV, the highest energy yet reached in any accelerator. The group's primary focus will lie in searches for modes that will include decays of H to bb, bb tau+tau-, W+bb and also to other more massive modes. They will also continue their development of the FTK, a hardware device that can quickly reconstruct the tracks in an event. This device will play a crucial role in handling the high rate and density of data anticipated.

该奖项支持的一个项目是寻找无法用标准模型（SM）解释的物理学的一部分。标准模型是描述构成宇宙中已知可见物质的基本粒子的理论。这将使用欧洲核子研究中心（位于瑞士的欧洲粒子物理实验室）的大型强子对撞机（LHC）上的ATLAS多粒子探测器来完成。2012年，ATLAS和另一个大型探测器在LHC上发现了希格斯玻色子(H)。H是SM预测存在的最后一个粒子。它的发现是大型强子对撞机的目标之一。在这个项目中，PI和她的科学家小组将使用大型强子对撞机，其运行能量是2012年达到的两倍（13 TeV）。他们将寻找H衰变成b反b夸克对（bb）的事件。这种衰变的细节，比如发生的频率，可以揭示在SM的各种扩展中所预测的其他类希格斯粒子是否存在。增加的能量也将使他们能够寻找更远、更大的希格斯态。她和她的团队还将在ATLAS探测器本身的升级计划中发挥作用。他们将致力于开发和使用一种设备，这种设备可以非常快速地从硅基设备中重建数据，从而绘制出带电粒子通过硅基设备的路径。本计划资助PI一人、博士后一人、研究生一人。这个小组将收集和分析从2015年夏天开始并持续到2017年底的大型强子对撞机第二期运行的事件。大型强子对撞机将以13 TeV的能量运行，这是迄今为止所有加速器所能达到的最高能量。该小组的主要重点将是寻找包括H到bb、bb tau+tau-、W+bb以及其他更大质量模式的衰变模式。他们还将继续开发FTK，这是一种可以在事件中快速重建轨道的硬件设备。该设备将在处理预期的高速率和高密度数据方面发挥关键作用。