Rapid event extraction and tensorial event adaption: Libraries for efficient access and generic reweighting of parton-level events and their implementation in the MadtRex module

2025/10/06 by Roiser, Stefan, Schöfbeck, Robert, Wettersten, Zenny · 1 citation
#Accelerator Physics (physics.acc-ph) #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2510.05100

Abstract

We present Rex and teaRex, C++17 libraries for efficient management of parton-level hard scattering event information and completely generic reweighting of such events, respectively. Rex is primarily an interfacing and I/O library for Les Houches Event format files and provides an internal event format designed with data parallelism in mind, and teaRex extends this format to provide full parton-level reweighting functionality with minimal code needing to be written by the end user. These libraries serve as the foundation for the MadtRex reweighting module for MadGraph5_aMC@NLO, extending the functionality of the CUDACPP plugin to allow for data-parallel model-generic leading order parameter reweighting on SIMD-enabled CPUs and SIMT GPUs, speeding up reweighting by more than two orders of magnitude compared to MadGraph5_aMC@NLO running on the exact same hardware while providing trivial scalability to larger and distributed systems.

Citations

• Data-parallel leading-order event generation in MadGraph5_aMC@NLO
• Madgraph on GPUs and vector CPUs: towards production (The 5-year journey to the first LO release CUDACPP v1.00.00)
• Accelerating Berends-Giele recursion for gluons in arbitrary dimensions over finite fields
• Madgraph5_aMC@NLO on GPUs and vector CPUs Experience with the first alpha release
• Efficient precision simulation of processes with many-jet final states at the LHC
• Speeding up Madgraph5 aMC@NLO through CPU vectorization and GPU offloading: towards a first alpha release
• Many-gluon tree amplitudes on modern GPUs: A case study for novel event generators
• Les Houches 2013: Physics at TeV Colliders: Standard Model Working Group Report
• THE TOOLS AND MONTE CARLO WORKING GROUP Summary Report from the Les Houches 2009 Workshop on TeV Colliders
• Generic User Process Interface for Event Generators

Cited by

• Amplitude Surrogates for Multi-Jet Processes

Related

• Data-parallel leading-order event generation in MadGraph5_aMC@NLO
• MadSpace -- Event Generation for the Era of GPUs and ML
• Acceleration beyond lowest order event generation: An outlook on further parallelism within MadGraph5_aMC@NLO
• Speeding up Madgraph5 aMC@NLO through CPU vectorization and GPU offloading: towards a first alpha release
• Madgraph5_aMC@NLO on GPUs and vector CPUs Experience with the first alpha release