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

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 m...

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Detalles Bibliográficos
Autores principales: Abreu, S, Dormans, J, Febres Cordero, F, Ita, H, Kraus, M, Page, B, Pascual, E, Ruf, M S, Sotnikov, V
Lenguaje:eng
Publicado: 2021
Materias:
hep-ph
hep-th
Particle Physics - Phenomenology
Particle Physics - Theory
Acceso en línea:https://dx.doi.org/10.1016/j.cpc.2021.108069
http://cds.cern.ch/record/2778914
Descripción
Sumario: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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