Kaleu: a general-purpose parton-level phase space generator

TL;DR

Kaleu is a versatile phase space generator that adaptively samples multi-particle scattering events, improving integration efficiency for particle physics calculations.

Contribution

It introduces a general-purpose, adaptive phase space generator capable of handling multiple scattering processes in parallel, written in Fortran.

Findings

Successfully samples importance-weighted phase space points

Adapts dynamically to the integration problem

Handles multiple processes simultaneously

Abstract

Kaleu is an independent, true phase space generator. After providing it with some information about the field theory and the particular multi-particle scattering process under consideration, it returns importance sampled random phase space points. Providing it also with the total weight of each generated phase space point, it further adapts to the integration problem on the fly. It is written in Fortran, such that it can independently deal with several scattering processes in parallel.