CAMORRA: a C++ library for recursive computation of particle scattering amplitudes

TL;DR

CAMORRA is a C++ library that efficiently computes tree-level scattering amplitudes in high-energy physics using recursive methods, supporting user-defined models and complex final states.

Contribution

It introduces a flexible, high-performance Monte Carlo tool capable of handling arbitrary processes and models with recursive amplitude evaluation.

Findings

Supports user-defined models and high multiplicity processes

Efficient recursive computation of matrix elements

Handles continuous color and helicity states

Abstract

We present a new Monte Carlo tool that computes full tree-level matrix elements in high-energy physics. The program accepts user-defined models and has no restrictions on the process multiplicity. To achieve acceptable performance, CAMORRA evaluates the matrix elements in a recursive way by combining off-shell currents. Furthermore, CAMORRA can be used to compute amplitudes involving continuous color and helicity final states.