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Caravel: A C++ Framework for the Computation of Multi-Loop Amplitudes with Numerical Unitarity

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arxiv 2009.11957 v1 pith:3YCT6VAI submitted 2020-09-24 hep-ph hep-th

S. Abreu , J. Dormans , F. Febres Cordero , H. Ita , M. Kraus , B. Page , E. Pascual , M. S. Ruf
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V. Sotnikov
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classification hep-phhep-th
keywords amplitudescaravelcomputationnumericalframeworkmulti-loopone-scattering
verification ladder T0 review T1 audit T2 compute T3 formal
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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. We provide programs that showcase Caravel's main functionalities and allow to compute selected one- and two-loop amplitudes.

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Cited by 4 Pith papers

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