论文标题
通过简化的飞行员运行和快速PDF加速LHC活动生成
Accelerating LHC event generation with simplified pilot runs and fast PDFs
论文作者
论文摘要
LHC物理学的精确事件生成器的计算效率差已成为蒙特卡洛事件仿真活动的瓶颈。我们通过重点关注通用事件生成器的两个主要组成部分来为该问题提供解决方案：PDF评估器和矩阵元素生成器。对于Atlas实验中的典型生产设置，我们表明两者可以消耗总运行时的80％。 Using NLO simulations of $pp\to\ell^+\ell^-+\text{jets}$ and $pp\to t\bar{t}+\text{jets}$ as an example, we demonstrate that the computing footprint of LHAPDF and Sherpa can be reduced by factors of order 10, while maintaining the formal accuracy of the event sample.改进的代码可公开可用。
Poor computing efficiency of precision event generators for LHC physics has become a bottleneck for Monte-Carlo event simulation campaigns. We provide solutions to this problem by focusing on two major components of general-purpose event generators: The PDF evaluator and the matrix-element generator. For a typical production setup in the ATLAS experiment, we show that the two can consume about 80% of the total runtime. Using NLO simulations of $pp\to\ell^+\ell^-+\text{jets}$ and $pp\to t\bar{t}+\text{jets}$ as an example, we demonstrate that the computing footprint of LHAPDF and Sherpa can be reduced by factors of order 10, while maintaining the formal accuracy of the event sample. The improved codes are made publicly available.
