Your browser has javascript turned off or blocked. This will lead to some parts of our website to not work properly or at all. Turn on javascript for best performance.

The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here:

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Photo of Rikkert Frederix

Rikkert Frederix

Senior lecturer

Photo of Rikkert Frederix

A proposal for a standard interface between Monte Carlo tools and one-loop programs


  • T. Binoth
  • F. Boudjema
  • G. Dissertori
  • A. Lazopoulos
  • A. Denner
  • S. Dittmaier
  • R. Frederix
  • N. Greiner
  • S. Höche
  • W. Giele
  • P. Skands
  • J. Winter
  • T. Gleisberg
  • J. Archibald
  • G. Heinrich
  • F. Krauss
  • D. Maître
  • M. Huber
  • J. Huston
  • N. Kauer
  • F. Maltoni
  • C. Oleari
  • G. Passarino
  • R. Pittau
  • S. Pozzorini
  • T. Reiter
  • S. Schumann
  • G. Zanderighi

Summary, in English

Many highly developed Monte Carlo tools for the evaluation of cross sections based on tree matrix elements exist and are used by experimental collaborations in high energy physics. As the evaluation of one-loop matrix elements has recently been undergoing enormous progress, the combination of one-loop matrix elements with existing Monte Carlo tools is on the horizon. This would lead to phenomenological predictions at the next-to-leading order level. This note summarises the discussion of the next-to-leading order multi-leg (NLM) working group on this issue which has been taking place during the workshop on Physics at TeV Colliders at Les Houches, France, in June 2009. The result is a proposal for a standard interface between Monte Carlo tools and one-loop matrix element programs. Dedicated to the memory of, and in tribute to, Thomas Binoth, who led the effort to develop this proposal for Les Houches 2009. Thomas led the discussions, set up the subgroups, collected the contributions, and wrote and edited this paper. He made a promise that the paper would be on the arXiv the first week of January, and we are faithfully fulfilling his promise. In his honour, we would like to call this the Binoth Les Houches Accord.

Publishing year







Computer Physics Communications





Document type

Journal article




  • Les Houches Accord
  • Monte Carlo tools
  • One-loop computations




  • ISSN: 0010-4655