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

K. Hagiwara, J. Kanzaki, N. Okamura, D. Rainwater, T. Stelzer

Research output: Contribution to journalArticlepeer-review

Abstract

We use the graphics processing unit (GPU) for fast calculations of helicity amplitudes of physics processes. As our first attempt, we compute uū → γ (n=2 to 8) processes in pp collisions at √s = 14 TeV by transferring the MadGraph generated HELAS amplitudes (FORTRAN) into newly developed HEGET (HELAS Evaluation with GPU Enhanced Technology) 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 a 40-150 times better performance on the GPU.

Original languageEnglish (US)
Pages (from-to)477-492
Number of pages16
JournalEuropean Physical Journal C
Volume66
Issue number3
DOIs
StatePublished - Apr 2010

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

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