Calculation of higher order corrections for TeV colliders

TeV 对撞机高阶修正的计算

• 批准号: PP/D00621X/2
• 负责人: Gudrun Heinrich
• 金额: $ 38.81万
• 依托单位: Durham University
• 依托单位国家: 英国
• 项目类别: Fellowship
• 财政年份: 2008
• 资助国家: 英国
• 起止时间: 2008 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=PP%2FD00621X%2F2
• 关键词: Calculation; higher; order; corrections; TeV

Our current understanding about the constituents of matter is summarized in the so-called Standard Model (SM) of Elementary Particle Physics. This model has been established and tested over the past decades at several high energy particle colliders around the world. However, one ingredient of this model, the Higgs boson, is still missing. Further, there are theoretical reasons to believe that the SM is only an effective theory at low energies of a more fundamental underlying theory behind. Candidates for such theories are supersymmetry, supergravity or string theories/theories with more than four space-time dimensions. To find the Higgs boson and to find out about a more fundamental theory, particle collisions at higher energies than in past experiments have to be investigated. To this aim, a Large Hadron Collider (LHC) is built at CERN (Geneva) where two protons are lead to collision, each having an energy which will be sufficient to produce Higgs bosons if the Standard Model assumptions are right. However, in order to extract such Higgs production events (called 'signals') from the huge amount of 'uninteresting' collisions (called 'background'), precise calculations and simulations of the signal as well as the background events are necessary. Such calculations are subject of the proposed research. In order to achieve the required precision and to simulate the experimental environment as close as possible, so-called 'radiative corrections' have to be calculated. Some techniques for such calculations already have been established over the last years, but only for a very limited class of processes, i.e. processes where only few particles in the final state are detected. For multi-particle production, the calculations are quite involved and require the development of new methods, largely based on powerful computer resources. Further, an international electron-positron Linear Collider is planned where measurements of an unseen precision at very high energy can be performed in order to learn more about the properties of the new particles which should be discovered at the LHC and to find particles which could not be detected so far.. In order to make theoretical predictions with a precision needed for such a machine, the calculation of radiative corrections has to be pushed even further. The proposed project will lead to a very precise theoretical prediction for a process where three so-called 'jets' are produced, which are clusters of particles bound together by strong interactions. This calculation will enable the measurement of the strong coupling constant with an unprecedented precision and also open the door to high precision predictions for other processes. In summary, the project aims at the construction of highly automated programs in order to make precise theoretical predictions for the wealth of data which will be produced at future high energy colliders.

我们目前对物质成分的理解总结在基本粒子物理学的所谓标准模型（SM）中。在过去的几十年中，该模型已在世界各地的几个高能粒子山相山口处建立和测试。但是，该模型的一种成分，即希格斯玻色子，仍然缺少。此外，有理论上的理由相信SM只是背后更基本理论的低能量的有效理论。这些理论的候选人是超对称性，超级对称性或弦理论/理论，具有超过四个时空维度。为了找到希格斯玻色子并了解一个更基本的理论，必须研究比过去实验更高的粒子碰撞。为此，在Cern（Geneva）建造了一个大型强子对撞机（LHC），其中两个质子导致碰撞，每个质子具有足够的能量，如果标准模型假设是正确的，则足以产生Higgs玻色子。但是，为了从大量的“无趣”碰撞（称为“背景”）中提取此类希格斯生产事件（称为“信号”），需要对信号的精确计算和模拟以及背景事件。此类计算是拟议研究的主题。为了达到所需的精度，必须计算尽可能近的实验环境，必须计算所谓的“辐射校正”。在过去的几年中，已经建立了一些计算的技术，但仅针对非常有限的过程，即仅检测到最终状态中只有少数粒子的过程。对于多粒子生产，计算非常参与，需要开发新方法，这主要基于强大的计算机资源。此外，计划进行国际电子旋律线性碰撞器，以便可以执行未见精度的测量，以便更多地了解有关在LHC上应在LHC上发现的新粒子的属性的更多信息，并找到到目前为止无法检测到的粒子。为了迄今为止，可以通过计算的精确预测，以进行远程计算的精确预测。提出的项目将导致一个非常精确的理论预测，对于三个所谓的“喷气机”的过程，它们是由粒子的簇簇，并由强烈的相互作用结合在一起。该计算将使强耦合常数具有前所未有的精度，并为其他过程的高精度预测打开了大门。总而言之，该项目旨在构建高度自动化的计划，以便对将在未来的高能船员中生产的大量数据进行精确的理论预测。

项目成果

Matching NLLA+NNLO for event shape distributions

匹配 NLLA NNLO 以获得事件形状分布

• DOI: 10.1016/j.physletb.2008.05.023
• 发表时间: 2008
• 期刊: Physics Letters B
• 影响因子: 4.4
• 作者: Gehrmann T

A proposal for a standard interface between Monte Carlo tools and one-loop programs

关于蒙特卡罗工具和单循环程序之间标准接口的提案

• DOI: 10.1016/j.cpc.2010.05.016
• 发表时间: 2010
• 期刊: Computer Physics Communications
• 影响因子: 6.3
• 作者: Binoth T

Photon-jet correlations and constraints on fragmentation functions

• DOI: 10.1103/physrevd.79.114024
• 发表时间: 2009-03
• 期刊: Physical Review D
• 影响因子: 5
• 作者: Z. Belghobsi;M. Fontannaz;J. Guillet;G. Heinrich;E.Pilon;M. Werlen

Master integrals for fermionic contributions to massless three-loop form factors

费米子对无质量三环形状因数贡献的主积分

• DOI: 10.1016/j.physletb.2008.03.028
• 发表时间: 2008
• 期刊: Physics Letters B
• 影响因子: 4.4
• 作者: Heinrich G

Nine-propagator master integrals for massless three-loop form factors

无质量三环形状因数的九传播器主积分

• DOI: 10.1016/j.physletb.2009.06.038
• 发表时间: 2009
• 期刊: Physics Letters B
• 影响因子: 4.4
• 作者: Heinrich G