HepMC3 is a new version of the HepMC event record. It uses shared pointers for in-memory navigation and the POD concept for persistency.
Many extensions from HEPEVT, the Fortran HEP standard, are supported: the number of entries is unlimited, spin density matrices can be stored with each vertex, flow patterns (such as color) can be stored and traced, integers representing random number generator states can be stored, and an arbitrary number of event weights can be included. Particles and vertices are kept separate in a graph structure, physically similar to a physics event.
The added information supports the modularisation of event generators. The package has been kept as simple as possible with minimal internal/external dependencies. Event information is accessed by means of iterators supplied with the package.
This is free and open source software.
Website: gitlab.cern.ch/hepmc/HepMC3
Support:
Developer: The HepMC collaboration
License: GNU Lesser General Public License v3
HepMC is written in C++. Learn C++ with our recommended free books and free tutorials.
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