source: HiSusy/trunk/Pythia8/pythia8170/phpdoc/JetFinders.php @ 1

Last change on this file since 1 was 1, checked in by zerwas, 11 years ago

first import of structure, PYTHIA8 and DELPHES
File size: 2.5 KB
Line 
1<html>
2<head>
3<title>Jet Finders</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<script language=javascript type=text/javascript>
10function stopRKey(evt) {
11var evt = (evt) ? evt : ((event) ? event : null);
12var node = (evt.target) ? evt.target :((evt.srcElement) ? evt.srcElement : null);
13if ((evt.keyCode == 13) && (node.type=="text"))
14{return false;}
15}
16
17document.onkeypress = stopRKey;
18</script>
19<?php
20if($_POST['saved'] == 1) {
21if($_POST['filepath'] != "files/") {
22echo "<font color='red'>SETTINGS SAVED TO FILE</font><br/><br/>"; }
23else {
24echo "<font color='red'>NO FILE SELECTED YET.. PLEASE DO SO </font><a href='SaveSettings.php'>HERE</a><br/><br/>"; }
25}
26?>
27
28<form method='post' action='JetFinders.php'>
29
30<h2>Jet Finders</h2>
31
32<code>Pythia</code> comes with three <?php $filepath = $_GET["filepath"];
33echo "<a href='EventAnalysis.php?filepath=".$filepath."' target='page'>";?>built-in
34jet finders</a>, <code>ClusterJet</code> for <i>e^+e^-</i> events
35and <code>SlowJet</code> and <code>CellJet</code>for hadron collider ones.
36Especially the latter is not so well matched to the standards of its field,
37however. (But it is closely related to the anti-<i>kT</i> algorithm,
38so is also not completely disconnected [<a href="Bibliography.php" target="page">Cac08</a>].) 
39<code>SlowJet</code> can do jet finding according to the current-day
40<i>kT</i>, Cambridge/Aachen and anti-<i>kT</i> algorithms but,
41as the name indicates, is is rather slow, especially when compared with
42the <code>FastJet</code> alternative.
43
44<h3>FastJet</h3>
45
46For realistic jet studies the <code>FastJet</code> package
47[<a href="Bibliography.php" target="page">Cac06</a>] has become a standard. Several different
48jet options are available, such as <i>kT</i>,
49Cambridge/Aachen, anti-<i>kT</i> and SISCone.
50
51<p/>
52Linking to <code>FastJet</code> is foreseen in the configure
53file in the <code>examples</code> subdirectory, and the
54<code>main71.cc</code> and <code>main72.cc</code> programs contain
55examples how it can be used with <code>Pythia</code> events.
56
57<p/>
58The latter program makes use of the <code>include/FastJet3.h</code>
59header file, contributed by Gavin Salam. This allows simple input
60of a <code>Pythia</code> particle into a <code>FastJet</code> one,
61either retaining only the four-momentum or the full particle information.
62Thereby more sophisticated selectors become possible at the
63<code>FastJet</code> level.
64
65</body>
66</html>
67
68<!-- Copyright (C) 2012 Torbjorn Sjostrand -->
Note: See TracBrowser for help on using the repository browser.