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| 2 | <head> |
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| 3 | <title>Front</title> |
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| 4 | <link rel="stylesheet" type="text/css" href="pythia.css"/> |
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| 5 | <link rel="shortcut icon" href="pythia32.gif"/> |
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| 6 | </head> |
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| 7 | <body> |
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| 8 | |
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| 9 | <h1>PYTHIA 8</h1> |
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| 10 | |
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| 11 | <h2>Welcome to PYTHIA - The Lund Monte Carlo!</h2> |
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| 12 | |
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| 13 | <p/> |
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| 14 | PYTHIA 8 is the successor to PYTHIA 6, rewritten from scratch in C++. |
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| 15 | With the release of PYTHIA 8.1 it now becomes the official "current" |
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| 16 | PYTHIA version, although PYTHIA 6.4 will be supported in parallel |
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| 17 | with it for some time to come. Specifically, the new version has not |
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| 18 | yet been enough tested and tuned for it to have reached the same level |
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| 19 | of reliability as the older one. This testing will only happen if |
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| 20 | people begin to work with the program, however, which is why we |
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| 21 | encourage a gradual transition to the new version, starting now. |
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| 22 | There are some new physics features in PYTHIA 8.1, that would make |
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| 23 | use of it more attractive, but also some topics still missing, where |
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| 24 | 6.4 would have to be used. Further, many obsolete features will not |
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| 25 | be carried over, so for some backwards compatibility studies again |
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| 26 | 6.4 would be the choice. |
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| 27 | |
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| 28 | <h2>Documentation</h2> |
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| 29 | |
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| 30 | On these webpages you will find the up-to-date manual for PYTHIA 8.1. |
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| 31 | Use the left-hand index to navigate this documentation of program |
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| 32 | elements, especially of all possible program settings. All parameters |
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| 33 | are provided with sensible default values, however, so you need only |
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| 34 | change those of relevance to your particular study, such as choice of |
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| 35 | beams, processes and phase space cuts. The pages also contain a fairly |
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| 36 | extensive survey of all methods available to the user, e.g. to study |
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| 37 | the produced events. What is lacking on these webpages is an overview, |
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| 38 | on the one hand, and an in-depth physics description, on the other. |
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| 39 | |
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| 40 | <p/> |
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| 41 | The overview can be found in the attached PDF file |
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| 42 | <br/><a href="pythia8100.pdf" target="page"><b>A Brief Introduction |
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| 43 | to PYTHIA 8.1</b></a> |
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| 44 | <br/>T. Sjöstrand, S. Mrenna and P. Skands, |
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| 45 | Comput. Phys. Comm. 178 (2008) 852 [arXiv:0710.3820]. |
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| 46 | <br/>You are strongly recommended to read this summary when you |
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| 47 | start out to learn how to use PYTHIA 8.1. Note that some details |
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| 48 | have changed since the 8.100 version described there. |
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| 49 | |
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| 50 | <p/> |
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| 51 | For the physics description we refer to the complete |
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| 52 | <br/><b>PYTHIA 6.4 Physics and Manual</b> |
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| 53 | <br/>T. Sjöstrand, S. Mrenna and P. Skands, JHEP05 (2006) 026, |
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| 54 | <br/>which in detail describes the physics (largely) implemented also in |
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| 55 | PYTHIA 8, and also provides a more extensive bibliography than found |
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| 56 | here. |
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| 57 | |
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| 58 | <p/> |
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| 59 | When you use PYTHIA 8.1, you should therefore cite both, e.g. like |
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| 60 | <br/><b>T. Sjöstrand, S. Mrenna and P. Skands, JHEP05 (2006) 026, |
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| 61 | Comput. Phys. Comm. 178 (2008) 852</b>. |
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| 62 | |
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| 63 | <p/> |
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| 64 | Furthermore, a separate |
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| 65 | <br/><a href="worksheet.pdf" target="page"> |
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| 66 | <b>PYTHIA 8 Worksheet</b></a>, |
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| 67 | <br/>also an attached PDF file, offers a practical introduction to |
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| 68 | using the generator. It has been developed for and used at a few |
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| 69 | summer schools, with minor variations, but is also suited for |
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| 70 | self-study. |
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| 71 | |
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| 72 | <h2>Authors</h2> |
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| 73 | |
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| 74 | <p/> |
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| 75 | <b>Torbjörn Sjöstrand</b><br/> |
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| 76 | Department of Astronomy and Theoretical Physics, Lund University, |
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| 77 | Sölvegatan 14A, SE-223 62 Lund, Sweden<br/> |
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| 78 | phone: + 46 - 46 - 222 48 16, e-mail: torbjorn@thep.lu.se |
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| 79 | |
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| 80 | <p/> |
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| 81 | <b>Stefan Ask</b><br/> |
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| 82 | Department of Physics, University of Cambridge, |
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| 83 | Cavendish Laboratory, JJ Thomson Ave., Cambridge CB3 0HE, UK<br/> |
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| 84 | phone: +41 - 22 - 767 6707, e-mail: Stefan.Ask@cern.ch |
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| 85 | |
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| 86 | <p/> |
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| 87 | <b>Richard Corke</b><br/> |
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| 88 | Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, |
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| 89 | 2100 Copenhagen, Denmark<br/> |
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| 90 | e-mail: richard.corke@thep.lu.se |
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| 91 | |
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| 92 | <p/> |
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| 93 | <b>Stephen Mrenna</b><br/> |
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| 94 | Computing Division, Simulations Group, |
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| 95 | Fermi National Accelerator Laboratory, |
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| 96 | MS 234, Batavia, IL 60510, USA<br/> |
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| 97 | phone: + 1 - 630 - 840 - 2556, e-mail: mrenna@fnal.gov |
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| 98 | |
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| 99 | <p/> |
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| 100 | <b>Stefan Prestel</b><br/> |
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| 101 | Department of Astronomy and Theoretical Physics, Lund University, |
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| 102 | Sölvegatan 14A, SE-223 62 Lund, Sweden<br/> |
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| 103 | phone: + 46 - 46 - 222 06 64, e-mail: stefan.prestel@thep.lu.se |
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| 104 | |
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| 105 | <p/> |
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| 106 | <b>Peter Skands</b><br/> |
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| 107 | Theoretical Physics, CERN, CH-1211 Geneva 23, Switerland<br/> |
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| 108 | phone: + 41 - 22 - 767 2447, e-mail: peter.skands@cern.ch |
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| 109 | |
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| 110 | <h2>Further contributions</h2> |
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| 111 | |
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| 112 | Makefiles, configure scripts and HepMC interface by <b>Mikhail Kirsanov</b>. |
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| 113 | <br/>Conversion of XML files to PHP ones by <b>Ben Lloyd</b>. |
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| 114 | <br/>Simple Makefile for Win32/NMAKE by <b>Bertrand Bellenot</b>. |
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| 115 | <br/>Extended Higgs sector partly implemented by <b>Marc Montull</b>. |
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| 116 | <br/>Parts of charm and bottom decay tables courtesy <b>DELPHI</b> and |
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| 117 | <b>LHCb</b> collaborations. |
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| 118 | <br/>Tunes and comparisons with data, based on Rivet and Professor, |
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| 119 | by <b>Hendrik Hoeth</b>. |
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| 120 | <br/>Text and code on the use of ROOT in conjunction with PYTHIA |
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| 121 | by <b>Rene Brun</b>, <b>Andreas Morsch</b> and <b>Axel Naumann</b>. |
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| 122 | <br/>Code and data for MRST/MSTW PDFs by <b>Robert Thorne</b> and |
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| 123 | <b>Graeme Watt</b>. |
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| 124 | <br/>Code and data for the CTEQ/CT PDFs by <b>Joey Huston</b> |
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| 125 | and colleagues. |
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| 126 | <br/>Help with implementing new proton PDFs by <b>Tomas Kasemets</b>. |
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| 127 | <br/>Code and data for Pomeron PDFs by <b>H1</b> collaboration and |
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| 128 | especially <b>Paul Newman</b>. |
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| 129 | <br/>Help with implementing new Pomeron fluxes and PDFs by <b>Sparsh Navin</b>. |
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| 130 | <br/>The new Hidden Valley code developed together with <b>Lisa Carloni</b>. |
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| 131 | <br/>Code for a Kaluza-Klein electroweak gauge boson provided by |
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| 132 | <b>Noam Hod</b> and <b>Mark Sutton</b>. |
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| 133 | <br/>Code for equivalent photon flux around an unresolved proton by |
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| 134 | <b>Oystein Alvestad</b>. |
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| 135 | <br/>Part of the SUSY code by <b>Nishita Desai</b>. |
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| 136 | <br/>Tau decays with decay models and helicity information by |
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| 137 | <b>Philip Ilten</b>. |
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| 138 | <br/>The MBR diffractive model and central diffraction by |
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| 139 | <b>Robert Ciesielski</b>. |
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| 140 | <br/><b>Note</b>: in several cases modifications have been made to |
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| 141 | the original code, in order to integrate it with PYTHIA. In these cases |
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| 142 | the blame for any mistakes has to rest with the regular authors. |
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| 143 | |
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| 144 | <h2>Licence</h2> |
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| 145 | |
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| 146 | PYTHIA 8 is licensed under the |
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| 147 | <a href="COPYING" target="page"><b>GNU General Public Licence |
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| 148 | version 2</b></a>. |
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| 149 | <br/>Please respect the |
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| 150 | <a href="GUIDELINES" target="page"><b>MCnet Guidelines</b></a> |
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| 151 | for Event Generator Authors and Users. |
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| 152 | |
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| 153 | <p/> |
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| 154 | The program and the documentation is |
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| 155 | Copyright © 2012 Torbjörn Sjöstrand |
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| 156 | |
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| 157 | |
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| 158 | </body> |
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| 159 | </html> |
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| 160 | |
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| 161 | <!-- Copyright (C) 2012 Torbjorn Sjostrand --> |
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