ALOHA: Automatic libraries of helicity amplitudes for Feynman diagram computations
نویسندگان
چکیده
منابع مشابه
ALOHA: Automatic libraries of helicity amplitudes for Feynman diagram computations
We present an application that automatically writes the Helas library corresponding to the Feynman rules of any Lagrangian, renormalizable or not, in quantum field theory. The code, written in Python, takes the Universal FeynRules Output (Ufo) as an input and produces the complete set of routines (wavefunctions and amplitudes) that are needed for the computation of Feynman diagrams at leading a...
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The program MadGraph is presented which automatically generates postscript Feynman diagrams and Fortran code to calculate arbitrary tree level helicity amplitudes by calling HELAS[1] subroutines. The program is written in Fortran and is available in Unix and VMS versions. MadGraph currently includes standard model interactions of QCD and QFD, but is easily modi ed to include additional models s...
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HELAC-PHEGAS is a FORTRAN based package that is able to compute automatically and efficiently treeorder helicity amplitudes and cross sections for arbitrary scattering processes within the standard electroweak theory and QCD. The algorithm for the amplitude computation, HELAC, exploits the virtues of the Dyson-Schwinger equations. The phase-space generation algorithm, PHEGAS, constructs all pos...
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Single top quark production at hadron colliders allows a direct measurement of the top quark charged current coupling. We present the complete tree-level helicity amplitudes for four processes involving the production and semileptonic decay of a single top quark: W -gluon fusion, flavor excitation, s-channel production and W associated production. For the first three processes we study the qual...
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ژورنال
عنوان ژورنال: Computer Physics Communications
سال: 2012
ISSN: 0010-4655
DOI: 10.1016/j.cpc.2012.05.004