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DOE OSTI · 1865591

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

Abreu, S.·Dormans, J.·Cordero, F. Febres·Ita, H.·Kraus, M.·Page, B.·Pascual, E.·Ruf, M. S.·Sotnikov, V.
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Abstract

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. Here, we provide programs that showcase Caravel's main functionalities and allow to compute selected one- and two-loop amplitudes.

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97 MATHEMATICS AND COMPUTINGAutomated toolsGauge theoriesGravityLHCMulti-loop scattering amplitudesNumerical unitarityQCD

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Abreu, S., Dormans, J., Cordero, F. Febres, Ita, H., Kraus, M., Page, B., Pascual, E., Ruf, M. S., Sotnikov, V.. 2021-06-17. Caravel: A C++ framework for the computation of multi-loop amplitudes with numerical unitarity. https://doi.org/10.1016/j.cpc.2021.108069

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