High-order Calculations for Top Quark and Higgs Production

顶夸克和希格斯产生的高阶计算

• 批准号: 1519606
• 负责人: Nikolaos Kidonakis
• 金额: $ 15万
• 依托单位: Kennesaw State University Research and Service Foundation
• 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: 2015-09-01 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1519606&HistoricalAwards=false
• 关键词: order; Calculations; Top; Quark; Higgs

This award funds the research activities of Professor Nikolaos Kidonakis at Kennesaw State University.The research project of Professor Kidonakis concerns elementary particle physics that is relevant to the Large Hadron Collider (LHC), which is the highest-energy particle collider in the world. By colliding protons against each other at high energies at the LHC, physicists expect to learn about the fundamental particles of matter and their interactions at higher energies and smaller distances than have ever been previously explored. The top quark is the most massive fundamental particle that has been discovered, it has many unique properties, and thus it is a central part of the physics program at the LHC. The Higgs boson is the particle responsible for mass generation, its discovery at the LHC was a major discovery in physics, and the further elucidation of its properties is a high priority. In his research, Professor Kidonakis aims to develop theoretical methods to make precise predictions for processes at the LHC. In particular, Professor Kidonakis will improve theoretical predictions for top-quark production as well as for Higgs production by performing state-of-the-art calculations. As a result, the project research will advance the national interest by promoting the progress of science in one of its most fundamental directions: the discovery and understanding of elementary particles and new physical laws. This project is also envisioned to have significant broader impacts. Professor Kidonakis will involve students in his research, and thereby provide critical training for junior physicists beginning research in this field. He also intends to give public lectures on his research results, and introduce material into course curricula that emerge from his research.More technically, the objective of the proposed research of Professor Kidonakis is to calculate higher-order perturbative corrections to improve theoretical predictions for top-quark production and Higgs production in the Standard Model and in models of new physics. High-order corrections, including collinear, soft-gluon, and subleading logarithmic corrections, will be calculated for differential and total cross sections. The inclusion of these corrections is necessary to improve the accuracy of theoretical predictions by reducing uncertainty due to scale variation. Differential distributions are very important because they are sensitive to new physics. These calculations will be performed both for Standard-Model processes and for processes beyond the Standard Model, such as in supersymmetric models or models with flavor-changing neutral currents. The results of the project will be crucial in making state-of-the-art predictions for benchmark processes and for the interpretation of data from the LHC. The research findings will be widely disseminated through publication in refereed journals and presentations at international conferences and workshops, and through contacts with experimenters at the LHC.

该奖项资助肯尼索州立大学的Nikolaos Kidonakis教授的研究活动。Kidonakis教授的研究项目涉及与世界上能量最高的粒子对撞机大型强子对撞机（LHC）有关的基本粒子物理学。通过在大型强子对撞机上使质子以高能量相互碰撞，物理学家希望了解物质的基本粒子及其在更高能量和更小距离下的相互作用，而不是以前所探索的。顶夸克是已经发现的质量最大的基本粒子，它具有许多独特的性质，因此它是LHC物理计划的核心部分。希格斯玻色子是产生质量的粒子，它在LHC的发现是物理学上的一个重大发现，进一步阐明其性质是一个高度优先事项。 在他的研究中，Kidonakis教授的目标是发展理论方法，对LHC的过程进行精确预测。 特别是，Kidonakis教授将通过进行最先进的计算来改进对顶夸克生产和希格斯生产的理论预测。因此，该项目研究将通过促进科学最根本方向之一的进步来促进国家利益：基本粒子和新物理定律的发现和理解。预计该项目还将产生更广泛的重大影响。Kidonakis教授将让学生参与他的研究，从而为在这一领域开始研究的初级物理学家提供关键的培训。他还打算就自己的研究成果进行公开演讲，并将其研究成果引入课程。从技术上讲，Kidonakis教授拟议的研究目标是计算高阶微扰修正，以改进标准模型和新物理模型中顶夸克产生和希格斯粒子产生的理论预测。将计算微分截面和总截面的高阶修正，包括共线修正、软胶子修正和子导对数修正。 这些修正的列入是必要的，以提高理论预测的准确性，减少不确定性，由于规模的变化。微分分布是非常重要的，因为它们对新物理学很敏感。这些计算将对标准模型过程和超出标准模型的过程进行，例如在超对称模型或具有味道改变中性电流的模型中。该项目的结果将是至关重要的，在作出最先进的预测基准过程和解释数据从大型强子对撞机。 研究结果将通过在权威期刊上发表、在国际会议和研讨会上发表以及通过与LHC实验人员的联系而广泛传播。

项目成果

Total and Differential Cross Sections for Higgs and Top-Quark Production

• DOI: 10.3390/universe4110121
• 发表时间: 2018-09
• 期刊: Universe
• 影响因子: 2.9
• 作者: N. Kidonakis

Associated production of a top quark with a photon via anomalous couplings

• DOI: 10.1103/physrevd.98.074017
• 发表时间: 2018-08
• 期刊: Physical Review D
• 影响因子: 5
• 作者: M. Forslund;N. Kidonakis