ALOHA: Automatic Libraries Of Helicity Amplitudes for Feynman Diagram Computations. We present an application that automatically writes the Helas (HELicity Amplitude Subroutines) library corresponding to the Feynman rules of any quantum field theory Lagrangian. The code is written in Python and takes the Universal FeynRules Output (Ufo) as an input. From this input it produces the complete set of routines, wave-functions and amplitudes, that are needed for the computation of Feynman diagrams at leading as well as at higher orders. The representation is language independent and currently it can output routines in Fortran, C++, and Python. A few sample applications implemented in the MadGraph 5 framework are presented.
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- Belyaev, Alexander; Christensen, Neil D.; Pukhov, Alexander: CalcHEP 3.4 for collider physics within and beyond the standard model (2013)