Pythia has its roots in the Jetset program, begun more than 30 years ago. It has been used by generations of physicists, notably at LEP and the Tevatron, and for LHC preparations, but also in areas such as astroparticle physics. Traditionally Pythia has put strong emphasis on soft physics, such as hadronization, minimum-bias physics and the soft underlying event. At the same time it contains a wide selection of Standard Model (SM) and Beyond-Standard Model (BSM) processes, and modern dipole-style transverse- momentum-ordered parton showers.



The Pythia project includes Vincia as a subproject. Vincia is plugin to Pythia 8 for dipole-antenna showers. Tree-level matrix elements (e.g., from MadGraph) can be incorporated in the shower evolution, using the GKS matching scheme. Vincia also has extensive possibilities for uncertainty estimates, via systematic variations of shower parameters. The development focus in the near future is on extensions of the formalism to hadron collisions, the inclusion of NLO matrix elements in the shower evolution, and further automation of the uncertainty variations.


Direct link to the project home page.