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first import of structure, PYTHIA8 and DELPHES
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1<html>
2<head>
3<title>Front</title>
4<link rel="stylesheet" type="text/css" href="pythia.css"/>
5<link rel="shortcut icon" href="pythia32.gif"/>
6</head>
7<body>
8
9<h1>PYTHIA 8</h1>
10
11<h2>Welcome to PYTHIA - The Lund Monte Carlo!</h2>
12
13<p/>
14PYTHIA 8 is the successor to PYTHIA 6, rewritten from scratch in C++.
15With the release of PYTHIA 8.1 it now becomes the official "current"
16PYTHIA version, although PYTHIA 6.4 will be supported in  parallel
17with it for some time to come. Specifically, the new version has not
18yet been enough tested and tuned for it to have reached the same level
19of reliability as the older one. This testing will only happen if
20people begin to work with the program, however, which is why we
21encourage a gradual transition to the new version, starting now.
22There are some new physics features in PYTHIA 8.1, that would make
23use of it more attractive, but also some topics still missing, where
246.4 would have to be used. Further, many obsolete features will not
25be carried over, so for some backwards compatibility studies again
266.4 would be the choice.
27
28<h2>Documentation</h2>
29
30On these webpages you will find the up-to-date manual for PYTHIA 8.1.
31Use the left-hand index to navigate this documentation of program
32elements, especially of all possible program settings. All parameters
33are provided with sensible default values, however, so you need only
34change those of relevance to your particular study, such as choice of
35beams, processes and phase space cuts. The pages also contain a fairly
36extensive survey of all methods available to the user, e.g. to study
37the produced events. What is lacking on these webpages is an overview,
38on the one hand, and an in-depth physics description, on the other.
39
40<p/>
41The overview can be found in the attached PDF file
42<br/><a href="pythia8100.pdf" target="page"><b>A Brief Introduction
43to PYTHIA 8.1</b></a>
44<br/>T. Sj&ouml;strand, S. Mrenna and P. Skands,
45Comput. Phys. Comm. 178 (2008) 852 [arXiv:0710.3820].
46<br/>You are strongly recommended to read this summary when you
47start out to learn how to use PYTHIA 8.1. Note that some details
48have changed since the 8.100 version described there.
49
50<p/>
51For the physics description we refer to the complete
52<br/><b>PYTHIA 6.4 Physics and Manual</b>
53<br/>T. Sj&ouml;strand, S. Mrenna and P. Skands, JHEP05 (2006) 026,
54<br/>which in detail describes the physics (largely) implemented also in
55PYTHIA 8, and also provides a more extensive bibliography than found
56here.
57
58<p/>
59When you use PYTHIA 8.1, you should therefore cite both, e.g. like
60<br/><b>T. Sj&ouml;strand, S. Mrenna and P. Skands, JHEP05 (2006) 026,
61Comput. Phys. Comm. 178 (2008) 852</b>.
62
63<p/>
64Furthermore, a separate
65<br/><a href="worksheet.pdf" target="page">
66<b>PYTHIA 8 Worksheet</b></a>,
67<br/>also an attached PDF file, offers a practical introduction to
68using the generator. It has been developed for and used at a few
69summer schools, with minor variations, but is also suited for
70self-study.
71
72<h2>Authors</h2>
73
74<p/>
75<b>Torbj&ouml;rn Sj&ouml;strand</b><br/> 
76Department of Astronomy and Theoretical Physics, Lund University,
77S&ouml;lvegatan 14A, SE-223 62 Lund, Sweden<br/>
78phone: + 46 - 46 - 222 48 16, e-mail: torbjorn@thep.lu.se   
79
80<p/>
81<b>Stefan Ask</b><br/>
82Department of Physics, University of Cambridge,
83Cavendish Laboratory, JJ Thomson Ave., Cambridge CB3 0HE, UK<br/>
84phone: +41 - 22 - 767 6707, e-mail: Stefan.Ask@cern.ch
85
86<p/>
87<b>Richard Corke</b><br/> 
88Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17,
892100 Copenhagen, Denmark<br/>
90e-mail: richard.corke@thep.lu.se   
91
92<p/>
93<b>Stephen Mrenna</b><br/> 
94Computing Division, Simulations Group,
95Fermi National Accelerator Laboratory,
96MS 234, Batavia, IL 60510, USA<br/>
97phone: + 1 - 630 - 840 - 2556, e-mail: mrenna@fnal.gov
98
99<p/>
100<b>Stefan Prestel</b><br/> 
101Department of Astronomy and Theoretical Physics, Lund University,
102S&ouml;lvegatan 14A, SE-223 62 Lund, Sweden<br/>
103phone: + 46 - 46 - 222 06 64, e-mail: stefan.prestel@thep.lu.se   
104
105<p/>
106<b>Peter Skands</b><br/> 
107Theoretical Physics, CERN, CH-1211 Geneva 23, Switerland<br/> 
108phone: + 41 - 22 - 767 2447, e-mail: peter.skands@cern.ch
109
110<h2>Further contributions</h2>
111
112Makefiles, configure scripts and HepMC interface by <b>Mikhail Kirsanov</b>.
113<br/>Conversion of XML files to PHP ones by <b>Ben Lloyd</b>.
114<br/>Simple Makefile for Win32/NMAKE by <b>Bertrand Bellenot</b>.
115<br/>Extended Higgs sector partly implemented by <b>Marc Montull</b>.
116<br/>Parts of charm and bottom decay tables courtesy <b>DELPHI</b> and
117<b>LHCb</b> collaborations.
118<br/>Tunes and comparisons with data, based on Rivet and Professor,
119by <b>Hendrik Hoeth</b>.
120<br/>Text and code on the use of ROOT in conjunction with PYTHIA
121by <b>Rene Brun</b>, <b>Andreas Morsch</b> and <b>Axel Naumann</b>.
122<br/>Code and data for MRST/MSTW PDFs by <b>Robert Thorne</b> and
123<b>Graeme Watt</b>.
124<br/>Code and data for the CTEQ/CT PDFs by <b>Joey Huston</b> 
125and colleagues.
126<br/>Help with implementing new proton PDFs by <b>Tomas Kasemets</b>.
127<br/>Code and data for Pomeron PDFs by <b>H1</b> collaboration and
128especially <b>Paul Newman</b>. 
129<br/>Help with implementing new Pomeron fluxes and PDFs by <b>Sparsh Navin</b>.
130<br/>The new Hidden Valley code developed together with <b>Lisa Carloni</b>.
131<br/>Code for a Kaluza-Klein electroweak gauge boson provided by
132<b>Noam Hod</b> and <b>Mark Sutton</b>.
133<br/>Code for equivalent photon flux around an unresolved proton by
134<b>Oystein Alvestad</b>.
135<br/>Part of the SUSY code by <b>Nishita Desai</b>.
136<br/>Tau decays with decay models and helicity information by
137<b>Philip Ilten</b>.
138<br/>The MBR diffractive model and central diffraction by
139<b>Robert Ciesielski</b>.
140<br/><b>Note</b>: in several cases modifications have been made to
141the original code, in order to integrate it with PYTHIA. In these cases
142the blame for any mistakes has to rest with the regular authors.
143
144<h2>Licence</h2>
145
146PYTHIA 8 is licensed under the
147<a href="COPYING" target="page"><b>GNU General Public Licence
148version 2</b></a>.
149<br/>Please respect the
150<a href="GUIDELINES" target="page"><b>MCnet Guidelines</b></a>
151for Event Generator Authors and Users.
152
153<p/>
154The program and the documentation is
155Copyright &copy; 2012 Torbj&ouml;rn Sj&ouml;strand
156 
157
158</body>
159</html>
160
161<!-- Copyright (C) 2012 Torbjorn Sjostrand -->
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