Thread-Scalable Evaluation of Multi-Jet Observables

Walter Giele, Gerben Stavenga, Jan-Christopher Winter
Fermi National Accelerator Laboratory, Batavia, IL 60510, USA
arXiv:1002.3446v1 [hep-ph] (18 Feb 2010)


   title={Thread-Scalable Evaluation of Multi-Jet Observables},

   author={Giele, W. and Stavenga, G. and Winter, J.C.},

   journal={Arxiv preprint arXiv:1002.3446},



A leading-order, leading-color parton-level event generator is developed for use on a multi-threaded GPU. Speed-up factors between 150 and 300 are obtained compared to an unoptimized CPU-based implementation of the event generator. In this first paper we study the feasibility of a GPU-based event generator with an emphasis on the constraints imposed by the hardware. Some studies of Monte Carlo convergence and accuracy are presented for PP -> 2,…,10 jet observables using of the order of 1e11 events.
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