Caravel: A C++ framework for the computation of multi-loop amplitudes with numerical unitarity

Published: 6 August 2021| Version 1 | DOI: 10.17632/rfjrxrb3rk.1
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Description

We present the first public version of Caravel, a C++17 framework for the computation of multi-loop scattering amplitudes in quantum field theory, based on the numerical unitarity method. Caravel is composed of modules for the D-dimensional decomposition of integrands of scattering amplitudes into master and surface terms, the computation of tree-level amplitudes in floating point or finite-field arithmetic, the numerical computation of one- and two-loop amplitudes in QCD and Einstein gravity, and functional reconstruction tools. We provide programs that showcase Caravel's main functionalities and allow to compute selected one- and two-loop amplitudes.

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Computational Physics, Quantum Field Theory

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