Lattice calculations for Double Parton Distributions (DPDs)

双帕顿分布 (DPD) 的格子计算

• 批准号: 493441321
• 负责人: Professor Dr. Andreas Schäfer
• 金额: --
• 依托单位: Institut für Theoretische Physik
• 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/493441321?language=en
• 关键词: Lattice; calculations; Double; Parton; Distributions

In particular for proton-proton collisions at LHC there are significant contributions from Double Parton Interactions (DPIs), which are reactions in which not only one parton from each colliding proton undergoes a hard scattering, but two pairs simultaneously. For such reactions interference effects are relevant. While at present the theoretical QCD description of such reactions is far developed (also by us), the Double Parton Distributions (DPDs) which parameterize them are hardly known. Therefore, calculating Standard Model predictions including DPIs involves significant uncertainties which makes the identification of physics beyond the standard model more difficult. Because DPDs are genuinely non-perturbative objects and experimental data alone is insufficient to determine them, they can only be obtained from Lattice QCD simulations. We have developed and applied the needed techniques over the last years and have recently published first results for proton DPDs. We want to continue these calculations. To do so I am applying for one PhD position.

特别是对于大型强子对撞机的质子-质子碰撞，双部分子相互作用（DPI）做出了重大贡献，在这种反应中，每个碰撞质子不仅有一个部分子经历硬散射，而且两对部分子同时经历硬散射。对于此类反应，干扰效应是相关的。虽然目前此类反应的理论 QCD 描述已经很成熟（我们也是如此），但参数化它们的双帕顿分布 (DPD) 却鲜为人知。因此，计算包括 DPI 在内的标准模型预测涉及很大的不确定性，这使得识别标准模型之外的物理现象变得更加困难。 由于 DPD 是真正的非微扰物体，仅凭实验数据不足以确定它们，因此它们只能从格子 QCD 模拟中获得。我们在过去几年中开发并应用了所需的技术，最近发布了质子 DPD 的第一个结果。我们想继续这些计算。为此，我正在申请一个博士学位职位。