An introduction to PYTHIA 8.2

Torbjorn Sjostrand, Stefan Ask, Jesper Roy Christiansen, Richard Corke, Nishita Desai, Philip Ilten, Stephen Mrenna, Stefan Prestel, Christine O Rasmussen, Peter Zeiler Skands

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3449 Citations (Scopus)


The Pythia program is a standard tool for the generation of events in high-energy collisions, comprising a coherent set of physics models for the evolution from a few-body hard process to a complex multiparticle final state. It contains a library of hard processes, models for initial- and final-state parton showers, matching and merging methods between hard processes and parton showers, multiparton interactions, beam remnants, string fragmentation and particle decays. It also has a set of utilities and several interfaces to external programs. Pythia 8.2 is the second main release after the complete rewrite from Fortran to C++, and now has reached such a maturity that it offers a complete replacement for most applications, notably for LHC physics studies. The many new features should allow an improved description of data
Original languageEnglish
Pages (from-to)159-177
Number of pages19
JournalComputer Physics Communications
Publication statusPublished - 2015


  • Event generators
  • Multiparticle production
  • Matrix elements
  • Parton showers
  • Matching and merging
  • Multiparton interactions
  • Hadronisation

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