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.

特别是在LHC处的质子蛋白碰撞，双方相互作用（DPI）有显着贡献，这些反应不仅是每个碰撞质子的一个parton都会经历硬散射，而且同时进行了两对。对于此类反应，干扰效应是相关的。虽然目前，这种反应的理论QCD描述是遥不可及的（也是由我们开发的），但鲜为人知的参数化它们的双parton分布（DPD）。因此，计算包括DPI在内的标准模型预测涉及严重的不确定性，这使得超出标准模型以外的物理学的识别更加困难。 由于DPD是真正的非扰动对象，并且仅实验数据不足以确定它们，因此只能从晶格QCD模拟中获得它们。在过去的几年中，我们已经开发并应用了所需的技术，并最近为Proton DPDS发布了第一个结果。我们想继续这些计算。为此，我正在申请一个博士职位。