Fast calculation of HELAS amplitudes using graphics processing unit (GPU)

Details Fast calculation of HELAS amplitudes using graphics processing unit (GPU) Fast calculation of HELAS amplitudes using graphics processing unit (GPU)

2009-08-30

arxiv.org/abs/0908.4403v2

Eur.Phys.J.C66:477-492,2010

Physics

Computational Physics

14 pages, 8 figures

Scientific paper

10.1140/epjc/s10052-010-1276-8

We use the graphics processing unit (GPU) for fast calculations of helicity amplitudes of physics processes. As our first attempt, we compute $u\bar{u}\to n\gamma$ ($n=2$ to 8) processes in $pp$ collisions at $\sqrt{s} = 14$TeV by transferring the MadGraph generated HELAS amplitudes (FORTRAN) into newly developed HEGET ({\bf H}ELAS {\bf E}valuation with {\bf G}PU {\bf E}nhanced {\bf T}echnology) codes written in CUDA, a C-platform developed by NVIDIA for general purpose computing on the GPU. Compared with the usual CPU programs, we obtain 40-150 times better performance on the GPU.

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