Blog
About

85
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      A Brief Introduction to PYTHIA 8.1

      Preprint

      ,   ,

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          The PYTHIA program is a standard tool for the generation of high-energy collisions, comprising a coherent set of physics models for the evolution from a few-body hard process to a complex multihadronic final state. It contains a library of hard processes and models for initial- and final-state parton showers, multiple parton-parton interactions, beam remnants, string fragmentation and particle decays. It also has a set of utilities and interfaces to external programs. While previous versions were written in Fortran, PYTHIA 8 represents a complete rewrite in C++. The current release is the first main one after this transition, and does not yet in every respect replace the old code. It does contain some new physics aspects, on the other hand, that should make it an attractive option especially for LHC physics studies.

          Related collections

          Most cited references 2

          • Record: found
          • Abstract: found
          • Article: found
          Is Open Access

          Transverse-Momentum-Ordered Showers and Interleaved Multiple Interactions

          We propose a sophisticated framework for high-energy hadronic collisions, wherein different QCD physics processes are interleaved in a common sequence of falling transverse-momentum values. Thereby phase-space competition is introduced between multiple parton-parton interactions and initial-state radiation. As a first step we develop new transverse-momentum-ordered showers for initial- and final-state radiation, which should be of use also beyond the scope of the current article. These showers are then applied in the context of multiple interactions, and a few tests of the new model are presented. The article concludes with an outlook on further aspects, such as the possibility of a shower branching giving partons participating in two different interactions.
            Bookmark
            • Record: found
            • Abstract: found
            • Article: found
            Is Open Access

            Non-perturbative QCD Effects and the Top Mass at the Tevatron

            We present a new, universally applicable toy model of colour reconnections in hadronic final states. The model is based on hadronising strings and has one free parameter. We next present an implementation of this model in the Pythia event generator and provide several parameter sets ("tunes"), constrained by fits to Tevatron minimum-bias data. Finally, we consider the sensitivity of a simplified top mass analysis to these effects, in exclusive semi-leptonic top events at the Tevatron. A first attempt at isolating the genuine non-perturbative effects gives an estimate of order delta(m_top) ~ 0.5 GeV from non-perturbative uncertainties, and a further delta(m_top) ~ 1 GeV from shower effects.
              Bookmark

              Author and article information

              Journal
              20 October 2007
              Article
              10.1016/j.cpc.2008.01.036
              0710.3820
              Custom metadata
              CERN-LCGAPP-2007-04, LU TP 07-28, FERMILAB-PUB-07-512-CD-T
              Comput.Phys.Commun.178:852-867,2008
              27 pages
              hep-ph

              Comments

              Comment on this article

              Similar content 10

              Cited by 369

              Most referenced authors 10