CAREER: Physics With High pT Muons: Top Quark Properties at Hadron Colliders

该提案旨在为东北大学高能物理（HEP）的长期研究计划提供资金。该计划的重点是费米实验室的Dzero实验和欧洲核子研究中心大型强子对撞机（LHC）的紧凑μ子螺线管（CMS）实验，这代表了粒子物理学的新能源前沿，也是美国HEP计划的重中之重。该提案要求支持东北大学物理系的Emanuela Barrant博士的职业发展。她是NU实验高能物理组的成员，她的研究领域是粒子加速器设施中基本粒子之间的结构和相互作用的研究。1992年至1997年，她是DESY的ZEUS合作成员，自1996年以来是费米实验室的Dzero合作成员，最近她加入了CERN的CMS合作。Barbaran教授在Tevatron对撞机的运行1中研究了顶夸克物理学，确定了顶夸克质量及其对喷射能量尺度测量的依赖性，并对顶夸克产生和衰变中的辐射校正进行了建模。自2001年以来，Dzero探测器一直在记录运行2的数据，预计将延长到十年结束，2005年将进行一系列探测器升级，以提高探测器在更高光度运行期间的性能。随着运行2的亮度和质心的增加（接近2 TeV），目标是用比运行1大20倍的数据样本对顶夸克的性质进行详细的研究。在Tevatron中，Barclay教授提出了对顶夸克的两个基本性质（质量和电荷）进行最精确测量的方法。Barthel教授研究计划的最终目的是研究顶夸克与粒子质量起源之间的联系，将顶夸克作为新物理学可能首先出现的实验室。Barboutin教授建议继续研究顶夸克和产生质量的希格斯场在大型强子对撞机的大质量中心能量14 TeV的相互作用，CMS探测器。CMS探测器定于2007年投入使用。在那里，计划是确定希格斯场和标准模型顶夸克之间的耦合强度，并测试标准模型如何扩展到以更基本的方式解释在自然界中观察到的质量模式，通过模型预测额外的更重的夸克的存在及其与希格斯场的相互作用。顶夸克产生和衰变的特征是探测到高pT衰变产物。在可能的末态衰变中，最干净的衰变包含高pT μ子。Barnard教授坚定地致力于扩大她的研究计划的范围，以教育广泛的学生，例如，本科生通过NU合作计划，SPS和暑期学校计划，高中生通过Quarknet计划。

This proposal seeks funding for a long-term research program in High Energy Physics (HEP) at Northeastern University. The program focuses on the Dzero experiment at Fermilab and on the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) at CERN, which represents the new energy frontier in particle physics and a top priority within the US HEP program. The proposal requests support for the career development of Dr. Emanuela Barberis of the Department of Physics at Northeastern University. She is a member of the experimental High Energy Physics group at NU and her area of research is the study of the structure and interactions among elementary particles at particle accelerator facilities. She has been a member of the ZEUS collaboration at DESY, from 1992 to 1997, a member of the Dzero collaboration at Fermilab since 1996, and she has recently joined the CMS collaboration at CERN. Prof. Barberis has worked on top quark physics in Run 1 of the Tevatron collider, on the determination of the top quark mass and its dependency on the measurement of the jet energy scale, and on the modeling of radiative corrections in top quark production and decay. Since 2001, the Dzero detector has been recording data from Run 2, which is expected to extend to the end of the decade, with a set of detector upgrades entering in 2005 to improve the detector performance during higher luminosity running. With increasing luminosity and the increased center of mass of Run 2 (nearly 2 TeV), the goal is to perform detailed studies of the properties of the top quark with a data sample twenty times larger than Run 1. At the Tevatron, Prof. Barberis proposes methods to perform the most precise measurements of two fundamental properties of the top quark, its mass and charge. The ultimate aim of Prof. Barberis' research program is to study the connection between the top quark and the origin of particle masses, using the top quark as the laboratory where new physics is likely to appear first. Prof. Barberis proposes to continue to study the interactions of the top quark and a mass-generating Higgs field at the large center of mass energy of the LHC, 14 TeV, with the CMS detector. The CMS detector is scheduled to be commissioned in 2007. There, the plan is to determine the strength of the coupling between the Higgs field and the Standard Model top quark, and to test how the Standard Model can extend to explain the pattern of masses observed in nature in a more fundamental way, via models which predict the existence of an additional, heavier quark, and its interactions with the Higgs field. The signature for the production and decay of top quark(s) is the detection of high pT decay products. Among the possible final state decays, the cleanest ones contain high pT muons. Prof. Barberis is strongly committed to extend the scope of her research program to educate a broad range of students, e.g., undergraduate students through the NU co-operative programs, SPS, and summer school initiatives, and high school students through the Quarknet program.