Electroweak parton shower for high-energy particle collisions

用于高能粒子碰撞的电弱帕顿簇射

• 批准号: 519466933
• 负责人: Professor Dr. Stefan Dittmaier
• 金额: --
• 依托单位: Physikalisches Institut
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/519466933?language=en
• 关键词: Electroweak; parton; shower; energy; particle

Electroweak corrections to particle reactions at high-energy colliders such as the LHC become increasingly important at energies well above the electroweak scale and reach several 10% in the TeV energy range. The dominant electroweak corrections are connected to the exchange or emission of electroweak gauge bosons and are of universal origin. While the leading virtual corrections are known at the one- and two-loop level in analytic form and mostly included in predictions (at least at the one-loop level), the real corrections induced by heavy-particle emission are most often neglected or left to background calculations carried out by experimentalists with leading-order Monte Carlo generators. This project aims at the development of a complete electroweak parton shower, which simulates massive-particle emission in a process-independent way, and the implementation of the shower in the multi-purpose Monte Carlo event generator SHERPA. The shower will be properly validated by detailed comparisons of cross-section predictions based on the shower on the one hand and on full matrix elements on the other. Moreover, the intrinsic precision of the shower will be investigated by varying the starting scale, the recoil scheme, and the ending condition of the shower. This project will improve the accuracy of theoretical predictions and our understanding of electroweak corrections to collider processes, will be beneficial to both the theory and experimental communities in particle physics, and will contribute to push theoretical predictions towards global percent accuracy.

在高能量乘务器（例如LHC）上对颗粒反应的校正越来越重要，在远高于电动台的能量下，在TEV能量范围内达到了10％。主要的电校正校正连接到Electroweak仪表玻色子的交换或发射，并且具有普遍的起源。尽管领先的虚拟校正是在分析形式的一环和两环级别中知道的，并且主要包括在预测中（至少在单循环水平上），但重型粒子发射引起的实际校正最常被忽略，或者是由实验者用前阶Monte Carlo Generators进行的实验者进行的背景计算。该项目旨在开发完整的Electroweak Parton淋浴，该淋浴以一种无关的方式模拟大规模的粒子发射，并在多用途蒙特卡洛事件发生器Sherpa中实施淋浴。淋浴将通过一方面基于淋浴的横截面预测的详细比较来适当验证，另一方面是完整的矩阵元素。此外，将通过改变起始尺度，后坐力方案和淋浴的结束状态来研究淋浴的内在精度。该项目将提高理论预测的准确性以及我们对对撞机过程的校正校正的理解，将对粒子物理学的理论和实验群落有益，并将有助于将理论预测推向全球百分比的准确性。