2HDMC — two-Higgs-doublet model calculator Original Research Article

We describe version 1.0.6 of the public C++ code 2HDMC, which can be used to perform calculations in a general, image-conserving, two-Higgs-doublet model (2HDM). The program features simple conversion between different parametrizations of the 2HDM potential, a flexible Yukawa sector specification with choices of different image-symmetries or more general couplings, a decay library including all two-body — and some three-body — decay modes for the Higgs bosons, and the possibility to calculate observables of interest for constraining the 2HDM parameter space, as well as theoretical constraints from positivity and unitarity. The latest version of the 2HDMC code and full documentation is available from: .