1 | <html> |
---|
2 | <head> |
---|
3 | <title>Process Selection</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> |
---|
10 | function stopRKey(evt) { |
---|
11 | var evt = (evt) ? evt : ((event) ? event : null); |
---|
12 | var node = (evt.target) ? evt.target :((evt.srcElement) ? evt.srcElement : null); |
---|
13 | if ((evt.keyCode == 13) && (node.type=="text")) |
---|
14 | {return false;} |
---|
15 | } |
---|
16 | |
---|
17 | document.onkeypress = stopRKey; |
---|
18 | </script> |
---|
19 | <?php |
---|
20 | if($_POST['saved'] == 1) { |
---|
21 | if($_POST['filepath'] != "files/") { |
---|
22 | echo "<font color='red'>SETTINGS SAVED TO FILE</font><br/><br/>"; } |
---|
23 | else { |
---|
24 | echo "<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='ProcessSelection.php'> |
---|
29 | |
---|
30 | <h2>Process Selection</h2> |
---|
31 | |
---|
32 | There is no way PYTHIA could contain all processes of interest, |
---|
33 | neither in terms of potential physics topics nor in terms of |
---|
34 | high-multiplicity final states. What exists is a reasonably |
---|
35 | complete setup of all <i>2 -> 1</i> and <i>2 -> 2</i> |
---|
36 | processes within the Standard Model, plus some examples of |
---|
37 | processes beyond that, again for low multiplicities. Combined with |
---|
38 | the PYTHIA parton showers, this should be enough to get a flying |
---|
39 | start in the study of many physics scenarios. |
---|
40 | Other processes could be fed in via the |
---|
41 | <?php $filepath = $_GET["filepath"]; |
---|
42 | echo "<a href='LesHouchesAccord.php?filepath=".$filepath."' target='page'>";?>Les Houches Accord</a> |
---|
43 | or be implemented as a |
---|
44 | <?php $filepath = $_GET["filepath"]; |
---|
45 | echo "<a href='SemiInternalProcesses.php?filepath=".$filepath."' target='page'>";?>Semi-Internal Process</a>. |
---|
46 | In the latter case the existing processes would act as obvious |
---|
47 | templates. |
---|
48 | |
---|
49 | <p/> |
---|
50 | By default all processes are switched off. You should switch on |
---|
51 | those you want to simulate. This may be done at two (occasionally |
---|
52 | three) levels, either for each individual process or for a group of |
---|
53 | processes. That is, a process is going to be generated either if its |
---|
54 | own flag or its group flag is on. There is no built-in construction |
---|
55 | to switch on a group and then switch off a few of its members. |
---|
56 | |
---|
57 | <p/> |
---|
58 | Each process is assigned an integer code. This code is not used in |
---|
59 | the internal administration of events (so having the same code for |
---|
60 | two completely different processes would not be a problem), but only |
---|
61 | intended to allow a simpler user separation of different processes. |
---|
62 | Also the process name is available, as a string. |
---|
63 | |
---|
64 | <p/> |
---|
65 | To ease navigation, the list of processes has been split into several |
---|
66 | separate pages, by main topic. The classification is hopefully |
---|
67 | intuitive, but by no means unambiguous. For instance, essentially |
---|
68 | all processes involve QCD, so the "QCD processes" are the ones that |
---|
69 | only involve QCD. (And also that is not completely true, once one |
---|
70 | includes all that may happen in multiparton interactions.) On these |
---|
71 | separate pages also appear the settings that are completely local |
---|
72 | to that particular process class, but not the ones that have a |
---|
73 | broader usage. |
---|
74 | |
---|
75 | <h3><?php $filepath = $_GET["filepath"]; |
---|
76 | echo "<a href='QCDProcesses.php?filepath=".$filepath."' target='page'>";?>QCD Processes</a></h3> |
---|
77 | |
---|
78 | QCD processes fall in two main categories: soft and hard. The soft ones |
---|
79 | contain elastic, diffractive and "minimum-bias" events, together |
---|
80 | covering the total cross section. Hard processea are the normal |
---|
81 | <i>2 -> 2</i> ones, including charm and bottom production. |
---|
82 | <br/>Reserved code range: 101 - 199. |
---|
83 | |
---|
84 | <h3><?php $filepath = $_GET["filepath"]; |
---|
85 | echo "<a href='ElectroweakProcesses.php?filepath=".$filepath."' target='page'>";?>Electroweak Processes</a></h3> |
---|
86 | |
---|
87 | Prompt-photon, <i>gamma^*/Z^0</i> and <i>W^+-</i> production, |
---|
88 | plus a few processes with <i>t</i>-channel boson exchange. |
---|
89 | <br/>Reserved code range: 201 - 299. |
---|
90 | |
---|
91 | <h3><?php $filepath = $_GET["filepath"]; |
---|
92 | echo "<a href='OniaProcesses.php?filepath=".$filepath."' target='page'>";?>Onia Processes</a></h3> |
---|
93 | |
---|
94 | Colour singlet and octet production of charmonium and bottomonium. |
---|
95 | <br/>Reserved code range: 401 - 499 for charmonium and |
---|
96 | 501 - 599 for bottomonium. |
---|
97 | |
---|
98 | <h3><?php $filepath = $_GET["filepath"]; |
---|
99 | echo "<a href='TopProcesses.php?filepath=".$filepath."' target='page'>";?>Top Processes</a></h3> |
---|
100 | |
---|
101 | Top production, singly or doubly. |
---|
102 | <br/>Reserved code range: 601 - 699. |
---|
103 | |
---|
104 | <h3><?php $filepath = $_GET["filepath"]; |
---|
105 | echo "<a href='FourthGenerationProcesses.php?filepath=".$filepath."' target='page'>";?>Fourth-Generation |
---|
106 | Processes</a></h3> |
---|
107 | |
---|
108 | Production of hypothetical fourth-generation fermions. |
---|
109 | <br/>Reserved code range: 801 - 899. |
---|
110 | |
---|
111 | <h3><?php $filepath = $_GET["filepath"]; |
---|
112 | echo "<a href='HiggsProcesses.php?filepath=".$filepath."' target='page'>";?>Higgs Processes</a></h3> |
---|
113 | |
---|
114 | Higgs production, within or beyond the Standard Model. |
---|
115 | See section on Left-Right-Symmetry processes for doubly charged Higgses. |
---|
116 | <br/>Reserved code range: 901 - 999 for a Standard Model Higgs |
---|
117 | and 1001 - 1199 for MSSM Higgses. |
---|
118 | |
---|
119 | <h3><?php $filepath = $_GET["filepath"]; |
---|
120 | echo "<a href='SUSYProcesses.php?filepath=".$filepath."' target='page'>";?>SUSY Processes</a></h3> |
---|
121 | |
---|
122 | Production of supersymmetric particles, currently barely begun. |
---|
123 | <br/>Reserved code range: 1001 - 2999. (Whereof 1001 - 1199 |
---|
124 | for Higgses; see above.) |
---|
125 | |
---|
126 | <h3><?php $filepath = $_GET["filepath"]; |
---|
127 | echo "<a href='NewGaugeBosonProcesses.php?filepath=".$filepath."' target='page'>";?>New-Gauge-Boson |
---|
128 | Processes</a></h3> |
---|
129 | |
---|
130 | Production of new gauge bosons such as <i>Z'</i> and <i>W'</i>. |
---|
131 | <br/>Reserved code range: 3001 - 3099. |
---|
132 | |
---|
133 | <h3><?php $filepath = $_GET["filepath"]; |
---|
134 | echo "<a href='LeftRightSymmetryProcesses.php?filepath=".$filepath."' target='page'>";?>Left-Right-Symmetry |
---|
135 | Processes</a></h3> |
---|
136 | |
---|
137 | Production of righthanded <i>Z_R</i> and <i>W_R</i> bosons and of |
---|
138 | doubly charged Higgses. |
---|
139 | <br/>Reserved code range: 3101 - 3199. |
---|
140 | |
---|
141 | <h3><?php $filepath = $_GET["filepath"]; |
---|
142 | echo "<a href='LeptoquarkProcesses.php?filepath=".$filepath."' target='page'>";?>Leptoquark Processes</a></h3> |
---|
143 | |
---|
144 | Production of a simple scalar leptoquark state. |
---|
145 | <br/>Reserved code range: 3201 - 3299. |
---|
146 | |
---|
147 | <h3><?php $filepath = $_GET["filepath"]; |
---|
148 | echo "<a href='CompositenessProcesses.php?filepath=".$filepath."' target='page'>";?>Compositeness Processes</a></h3> |
---|
149 | |
---|
150 | Production of excited fermion states and contact-interaction modification |
---|
151 | to interactions between fermions (excluding technicolor; see below). |
---|
152 | <br/>Reserved code range: 4001 - 4099. |
---|
153 | |
---|
154 | <h3>Technicolor Processes</h3> |
---|
155 | |
---|
156 | Production of technicolor particles and modifications of QCD processes |
---|
157 | by technicolor interactions. Does not exist yet. |
---|
158 | <br/>Reserved code range: 4101 - 4199. |
---|
159 | |
---|
160 | <h3><?php $filepath = $_GET["filepath"]; |
---|
161 | echo "<a href='HiddenValleyProcesses.php?filepath=".$filepath."' target='page'>";?>Hidden Valley Processes</a></h3> |
---|
162 | A scenario for the pair prodiction of new particles with couplings |
---|
163 | under a new gauge group, with invisible gauge bosons. Radiation of |
---|
164 | these gauge bosons is included in the standard final-state parton |
---|
165 | shower. |
---|
166 | <br/>Reserved code range: 4901 - 4999. |
---|
167 | |
---|
168 | <h3><?php $filepath = $_GET["filepath"]; |
---|
169 | echo "<a href='ExtraDimensionalProcesses.php?filepath=".$filepath."' target='page'>";?>Extra-Dimensional |
---|
170 | Processes</a></h3> |
---|
171 | |
---|
172 | A vast area, here represented by the production of a Randall-Sundrum |
---|
173 | excited graviton state and a Kaluza-Klein gluon, a Kaluza-Klein tower |
---|
174 | of <i>gamma/Z^0</i> excitations in one TeV^- sized extra dimension, |
---|
175 | several Large Extra Dimension processes, and a few related Unparticle |
---|
176 | processes. |
---|
177 | <br/>Reserved code range: 5001 - 5099. |
---|
178 | |
---|
179 | </body> |
---|
180 | </html> |
---|
181 | |
---|
182 | <!-- Copyright (C) 2012 Torbjorn Sjostrand --> |
---|
183 | |
---|