期刊
COMPUTER PHYSICS COMMUNICATIONS
卷 267, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.cpc.2021.108069
关键词
Numerical unitarity; Multi-loop scattering amplitudes; Gauge theories; Automated tools; QCD; LHC; Gravity
资金
- Fonds De La Recherche Scientifique - FNRS, Belgium
- U.S. Department of Energy [DE-SC0010102]
- European Research Council (ERC) under the European Union [725110]
- French Agence Nationale pour la Recherche [ANR-17-CE31-0001-01]
- German Research Foundation (DFG) within the Research Training Group [GRK 2044]
- state of Baden-Wurttemberg through bwHPC
CARAVEL is the first public version of a C++17 framework designed for computing multi-loop scattering amplitudes in quantum field theory using the numerical unitarity method. The framework consists of modules for various computations related to multi-loop amplitudes, showcasing functionalities through provided programs. Dependencies include Python, meson, and optional libraries such as Doxygen, Eigen, GiNaC, GMP, and Lapack.
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. Program summary Program Title: CARAVEL CPC Library link to program files: https://doi .org /10 .17632 /rfjrxrb3rk.1 Developer's repository link: https://gitlab .com /caravel -public /caravel .git Licensing provisions: GPLv3 Programming language: C++ External dependencies: center dot Required: Python3 [1], meson [2] center dot Optional: Doxygen [3], Eigen [4], GiNaC [5], GMP [6], Lapack [7], MPFR [8], MPI [9], PentagonLibrary [10, 11], QD [12] Nature of problem: The computation of multi-loop multi-particle scattering amplitudes in quantum field theory Solution method: The multi-loop numerical unitarity method, functional reconstruction algorithms Additional comments including restrictions and unusual features: Current version includes tools employed in previous calculations, with the aim of showcasing details of the algorithms employed. Computations are organized by provided data files. References [1] http://www.python .org/ [2] https://mesonbuild .com/ [3] http://www.doxygen .nl/ [4] http://eigen .tuxfamily.org/ [5] https://ginac .de/ [6] https://gmplib .org/ [7] http://www.netlib .org /lapack/ [8] https://www.mpfr.org/ [9] https://www.open -mpi .org/
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