A Les Houches Interface for BSM Generators

We propose to combine and slightly extend two existing “Les Houches Accords” to provide a simple generic interface between beyond-the-standardmodel parton-level and event-level generators. All relevant information — particle content, quantum numbers of new states, masses, cross sections, partonlevel events, etc — is collected in one single file, which adheres to the Les Houches Event File (LHEF) standard.