Top quark production and properties in 7 TeV proton-proton collisions

7 TeV 质子-质子碰撞中的顶夸克产生和性质

• 批准号: 30143759
• 负责人: Professor Dr. Markus Cristinziani
• 金额: --
• 依托单位: Department Physik
• 依托单位国家: 德国
• 项目类别: Independent Junior Research Groups
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/30143759?language=en
• 关键词: Top; quark; production; properties; TeV

The top quark is the heaviest and least known particle in the quark sector. Precision measurements of top quark properties are sensitive to new physics beyond the Standard Model. With this proposal we plan to study the top quark with the data available starting in 2007 from the ATLAS detector at the LHC collider. In particular we will measure the top-pair and single-top production cross sections, the W helicity in top decays and top spin correlations. As the precision of each measurement will reach levels never attained before, each result will provide a stringent test of the Standard Model of particle physics. Top quarks are identified through the tagging of one of its decay products, the bottom quark (b-tagging). We plan to significantly contribute to this collaboration wide effort.This project includes the development of pixel detectors for the LHC upgrade. The innermost detector plays a major role in the identification of b-quarks. It will be an essential contribution for the long-term future of collider physics and might result in applications in other fields. In particular, new concepts for sensor materials and module chain powering schemes will be explored.

顶夸克是夸克扇区中最重和最不为人所知的粒子。对顶夸克性质的精确测量对标准模型之外的新物理很敏感。有了这个提议，我们计划从2007年开始利用大型强子对撞机ATLAS探测器的数据研究顶夸克。特别是，我们将测量顶对和单顶产生截面，顶衰变和顶自旋相关的W螺旋度。由于每次测量的精度都将达到前所未有的水平，因此每次测量结果都将对粒子物理学的标准模型进行严格的测试。顶夸克是通过标记它的衰变产物之一，底夸克（b标记）来识别的。我们计划为这项广泛的合作努力做出重大贡献。该项目包括为大型强子对撞机升级开发像素探测器。最里面的探测器在b夸克的识别中起着重要的作用。这将是对对撞机物理学的长期未来的重要贡献，并可能导致在其他领域的应用。特别是，传感器材料和模块链供电方案的新概念将被探索。