A standard format for Les Houches Event Files

J. Alwall, A. Ballestrero, P. Bartalini, S. Belov, E Boos, Nicholas A. Buckley, J. M. Butterworth, L. Dudko, Stefano Frixione, L. Garren, Stefan Gieseke, A. Gusev, I Hinchliffe, J Huston, B. Kersevan, Frank Krauss, N. Lavesson, Leif Lönnblad, E. Maina, Fabio MaltoniMichelangelo L Mangano, F Moortgat, Stephen Mrenna, C. G. Papadopoulos, Roberto Pittau, Michael H. Seymour, A. Sherstnev, Torbjörn Sjöstrand, P. Skands, S. R. Slabospitsky, Z. Wa̧s, Bryan R Webber, M. Worek, D. Zeppenfeld

Research output: Contribution to journalArticleResearchpeer-review

238 Citations (Scopus)


A standard file format is proposed to store process and event information, primarily output from parton-level event generators for further use by general-purpose ones. The information content is identical with what was already defined by the Les Houches Accord five years ago, but then in terms of Fortran commonblocks. This information is embedded in a minimal XML-style structure, for clarity and to simplify parsing.

Original languageEnglish
Pages (from-to)300-304
Number of pages5
JournalComputer Physics Communications
Issue number4
Publication statusPublished - 15 Feb 2007
Externally publishedYes


  • Event generators
  • File format
  • Les Houches Accord

Cite this

Alwall, J., Ballestrero, A., Bartalini, P., Belov, S., Boos, E., Buckley, N. A., Butterworth, J. M., Dudko, L., Frixione, S., Garren, L., Gieseke, S., Gusev, A., Hinchliffe, I., Huston, J., Kersevan, B., Krauss, F., Lavesson, N., Lönnblad, L., Maina, E., ... Zeppenfeld, D. (2007). A standard format for Les Houches Event Files. Computer Physics Communications, 176(4), 300-304. https://doi.org/10.1016/j.cpc.2006.11.010