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1<html>
2<head>
3<title>Electroweak Processes</title>
4<link rel="stylesheet" type="text/css" href="pythia.css"/>
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6</head>
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28<form method='post' action='ElectroweakProcesses.php'>
29
30<h2>Electroweak Processes</h2>
31
32This page contains processes involving Prompt-photon, <i>gamma^*/Z^0</i>
33and <i>W^+-</i> production, plus a few with <i>t</i>-channel boson
34exchange.
35
36<h3>Prompt photon processes</h3>
37
38This group collects the processes where one or two photons are
39produced by the hard process. Additional sources of photons
40include parton showers and hadron decays. A <i>pT</i> cut
41is required to stay away from the unphysical low-<i>pT</i> region.
42An eikonalized description, intended to be valid at all <i>pT</i>,
43is included as part of the multiparton-interactions framework.
44
45<br/><br/><strong>PromptPhoton:all</strong>  <input type="radio" name="1" value="on"><strong>On</strong>
46<input type="radio" name="1" value="off" checked="checked"><strong>Off</strong>
47 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
48Common switch for the group of all prompt photon processes,
49as listed separately in the following.
50 
51
52<br/><br/><strong>PromptPhoton:qg2qgamma</strong>  <input type="radio" name="2" value="on"><strong>On</strong>
53<input type="radio" name="2" value="off" checked="checked"><strong>Off</strong>
54 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
55Scattering <i>q g -> q gamma</i>.
56Code 201.
57 
58
59<br/><br/><strong>PromptPhoton:qqbar2ggamma</strong>  <input type="radio" name="3" value="on"><strong>On</strong>
60<input type="radio" name="3" value="off" checked="checked"><strong>Off</strong>
61 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
62Scattering <i>q qbar -> g gamma</i>.
63Code 202.
64 
65
66<br/><br/><strong>PromptPhoton:gg2ggamma</strong>  <input type="radio" name="4" value="on"><strong>On</strong>
67<input type="radio" name="4" value="off" checked="checked"><strong>Off</strong>
68 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
69Scattering <i>g g -> g gamma</i>.
70<br/><b>Note:</b> This is a box graph. The full quark-mass dependence
71in the loop leads to very complicated expressions. The current
72implementation is based on assuming five massless quarks (see below),
73and thus is questionable at small (<i>pT &lt; m_b</i>) or large
74(<i>pT > m_t</i>) transverse momenta.
75Code 203.
76 
77
78<br/><br/><strong>PromptPhoton:ffbar2gammagamma</strong>  <input type="radio" name="5" value="on"><strong>On</strong>
79<input type="radio" name="5" value="off" checked="checked"><strong>Off</strong>
80 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
81Scattering <i>q qbar -> gamma gamma</i>.
82Code 204.
83 
84
85<br/><br/><strong>PromptPhoton:gg2gammagamma</strong>  <input type="radio" name="6" value="on"><strong>On</strong>
86<input type="radio" name="6" value="off" checked="checked"><strong>Off</strong>
87 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
88Scattering <i>g g -> gamma gamma</i>.
89<br/><b>Note:</b> This is a box graph. The full quark-mass dependence
90in the loop leads to very complicated expressions. The current
91implementation is based on assuming five massless quarks (see below),
92and thus is questionable at small (<i>pT &lt; m_b</i>) or large
93(<i>pT > m_t</i>) transverse momenta.
94Code 205.
95 
96
97<br/><br/><table><tr><td><strong>PromptPhoton:nQuarkLoop </td><td></td><td> <input type="text" name="7" value="5" size="20"/>  &nbsp;&nbsp;(<code>default = <strong>5</strong></code>; <code>minimum = 3</code>; <code>maximum = 6</code>)</td></tr></table>
98Number of quark flavours included in the box graphs resposible for
99<i>g g -> g gamma</i> and <i>g g-> gamma gamma</i> processes.
100Owing to the complexity if the massive expressions, quarks are treated
101as massless. The default value should be applicable in the range of
102transverse momenta above the <i>b</i> mass but below the <i>t</i> one.
103 
104
105<h3>Weak boson processes</h3>
106
107Under this heading we group processes involving the production
108of a single electroweak gauge boson, i.e. a <i>gamma^*/Z^0</i>
109or a <i>W^+-</i>, or a pair of them, or one of them in
110combination with a parton. Since the three sets are partly
111conflicting, each is associated with its own group flag.
112In addition, <i>t</i>-channel exchange of such a boson
113between two fermions form a separate group.
114
115<p/>
116There is one flag that can be used to influence the <i>gamma^*/Z^0</i>
117structure in all the processes below where it is produced, unless
118otherwise stated.
119<br/><br/><table><tr><td><strong>WeakZ0:gmZmode </td><td>  &nbsp;&nbsp;(<code>default = <strong>0</strong></code>; <code>minimum = 0</code>; <code>maximum = 2</code>)</td></tr></table>
120Choice of full <ei>gamma^*/Z^0</ei> structure or not in relevant
121processes.
122<br/>
123<input type="radio" name="8" value="0" checked="checked"><strong>0 </strong>: full <ei>gamma^*/Z^0</ei> structure, with interference included.<br/>
124<input type="radio" name="8" value="1"><strong>1 </strong>: only pure <ei>gamma^*</ei> contribution.<br/>
125<input type="radio" name="8" value="2"><strong>2 </strong>: only pure <ei>Z^0</ei> contribution.<br/>
126<br/><b>Note</b>: irrespective of the option used, the particle produced
127will always be assigned code 23 for <ei>Z^0</ei>, and open decay channels
128is purely dictated by what is set for the <ei>Z^0</ei>.
129
130<h4>Boson exchange</h4>
131
132The two processes in this subgroup is included as part of the
133multiparton-interactions framework.
134
135<br/><br/><strong>WeakBosonExchange:all</strong>  <input type="radio" name="9" value="on"><strong>On</strong>
136<input type="radio" name="9" value="off" checked="checked"><strong>Off</strong>
137 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
138Common switch for the group of <i>gamma^*/Z^0</i>
139or <i>W^+-</i> exchange between two fermions.
140 
141
142<br/><br/><strong>WeakBosonExchange:ff2ff(t:gmZ)</strong>  <input type="radio" name="10" value="on"><strong>On</strong>
143<input type="radio" name="10" value="off" checked="checked"><strong>Off</strong>
144 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
145Scattering <i>f f' -> f f'</i> via </i>gamma^*/Z^0</i>
146<i>t</i>-channel exchange, with full interference
147between the <i>gamma^*</i> and <i>Z^0</i>.
148Code 211.
149 
150
151<br/><br/><strong>WeakBosonExchange:ff2ff(t:W)</strong>  <input type="radio" name="11" value="on"><strong>On</strong>
152<input type="radio" name="11" value="off" checked="checked"><strong>Off</strong>
153 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
154Scattering <i>f_1 f_2 -> f_3 f_4</i> via </i>W^+-</i>
155<i>t</i>-channel exchange.
156Code 212.
157 
158
159<h4>Single boson</h4>
160
161<br/><br/><strong>WeakSingleBoson:all</strong>  <input type="radio" name="12" value="on"><strong>On</strong>
162<input type="radio" name="12" value="off" checked="checked"><strong>Off</strong>
163 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
164Common switch for the group of a single <i>gamma^*/Z^0</i>
165or <i>W^+-</i> production.
166 
167
168<br/><br/><strong>WeakSingleBoson:ffbar2gmZ</strong>  <input type="radio" name="13" value="on"><strong>On</strong>
169<input type="radio" name="13" value="off" checked="checked"><strong>Off</strong>
170 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
171Scattering <i>f fbar -> gamma^*/Z^0</i>, with full interference
172between the <i>gamma^*</i> and <i>Z^0</i>.
173Code 221.
174 
175
176<br/><br/><strong>WeakSingleBoson:ffbar2W</strong>  <input type="radio" name="14" value="on"><strong>On</strong>
177<input type="radio" name="14" value="off" checked="checked"><strong>Off</strong>
178 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
179Scattering <i>f fbar' -> W^+-</i>.
180Code 222.
181 
182
183<br/><br/><strong>WeakSingleBoson:ffbar2ffbar(s:gm)</strong>  <input type="radio" name="15" value="on"><strong>On</strong>
184<input type="radio" name="15" value="off" checked="checked"><strong>Off</strong>
185 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
186Scattering <i>f fbar -> gamma^* -> f' fbar'</i>. Subset of
187process 221, but written as a <i>2 -> 2</i> process, so that
188<i>pT</i> can be used as ordering variable, e.g. in multiparton
189interactions. Hardcoded for the final state being either of the
190five quark flavours or three lepton ones. Not included in the
191<code>WeakSingleBoson:all</code> set, but included in the
192multiparton-interactions framework.
193Code 223.
194 
195
196<h4>Boson pair</h4>
197
198Note that, in the decay of the two vector bosons produced by an
199<i>f fbar -> V V</i> process, the full four-fermion correlations
200from the leading-order <i>f fbar -> V V -> 4f</i> matrix elements
201are included [<a href="Bibliography.php" target="page">Gun86</a>] (with some extensions by the authors).
202The matrix elements are provided in the double-resonant approach, i.e.
203excludes graph like <i>f fbar -> V -> f fbar -> f fbar V -> 4f</i>.
204
205<br/><br/><strong>WeakDoubleBoson:all</strong>  <input type="radio" name="16" value="on"><strong>On</strong>
206<input type="radio" name="16" value="off" checked="checked"><strong>Off</strong>
207 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
208Common switch for the group of pair production of <i>gamma^*/Z^0</i>
209and <i>W^+-</i>.
210 
211 
212<br/><br/><strong>WeakDoubleBoson:ffbar2gmZgmZ</strong>  <input type="radio" name="17" value="on"><strong>On</strong>
213<input type="radio" name="17" value="off" checked="checked"><strong>Off</strong>
214 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
215Scattering <i>f fbar' -> gamma^*/Z^0 gamma^*/Z^0</i>.
216Code 231.
217 
218
219<br/><br/><strong>WeakDoubleBoson:ffbar2ZW</strong>  <input type="radio" name="18" value="on"><strong>On</strong>
220<input type="radio" name="18" value="off" checked="checked"><strong>Off</strong>
221 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
222Scattering <i>f fbar' -> Z^0 W^+-</i>. Note that here the
223<i>gamma^*</i> contribution is not (currently) included.
224Code 232.
225 
226 
227<br/><br/><strong>WeakDoubleBoson:ffbar2WW</strong>  <input type="radio" name="19" value="on"><strong>On</strong>
228<input type="radio" name="19" value="off" checked="checked"><strong>Off</strong>
229 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
230Scattering <i>f fbar -> W^+ W^-</i>.
231Code 233.
232 
233
234<h4>Boson and parton</h4>
235
236<br/><br/><strong>WeakBosonAndParton:all</strong>  <input type="radio" name="20" value="on"><strong>On</strong>
237<input type="radio" name="20" value="off" checked="checked"><strong>Off</strong>
238 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
239Common switch for the group of production of a single electroweak
240gauge boson, i.e. a <i>gamma^*/Z^0</i> or a <i>W^+-</i>, in
241association with a parton, i.e. a quark, gluon, photon or lepton.
242These processes give first-order corrections to the ones in the
243<code>WeakSingleBoson</code> class, and both sets cannot be used
244simultaneously without unphysical doublecounting. The current class
245should only be used to study the high-<i>pT</i> tail of the
246gauge-boson production processes (for LHC applications at least
247<i>pT</i> > 20 GeV), while the ones in <code>WeakSingleBoson</code>
248should be used for inclusive production.
249 
250 
251<br/><br/><strong>WeakBosonAndParton:qqbar2gmZg</strong>  <input type="radio" name="21" value="on"><strong>On</strong>
252<input type="radio" name="21" value="off" checked="checked"><strong>Off</strong>
253 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
254Scattering <i>q qbar -> gamma^*/Z^0 g</i>.
255Code 241.
256 
257 
258<br/><br/><strong>WeakBosonAndParton:qg2gmZq</strong>  <input type="radio" name="22" value="on"><strong>On</strong>
259<input type="radio" name="22" value="off" checked="checked"><strong>Off</strong>
260 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
261Scattering <i>q g -> gamma^*/Z^0 q </i>.
262Code 242.
263 
264 
265<br/><br/><strong>WeakBosonAndParton:ffbar2gmZgm</strong>  <input type="radio" name="23" value="on"><strong>On</strong>
266<input type="radio" name="23" value="off" checked="checked"><strong>Off</strong>
267 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
268Scattering <i>f fbar -> gamma^*/Z^0 gamma</i>.
269Code 243.
270 
271 
272<br/><br/><strong>WeakBosonAndParton:fgm2gmZf</strong>  <input type="radio" name="24" value="on"><strong>On</strong>
273<input type="radio" name="24" value="off" checked="checked"><strong>Off</strong>
274 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
275Scattering <i>f gamma ->  gamma^*/Z^0 f</i>.
276Code 244.
277 
278 
279<br/><br/><strong>WeakBosonAndParton:qqbar2Wg</strong>  <input type="radio" name="25" value="on"><strong>On</strong>
280<input type="radio" name="25" value="off" checked="checked"><strong>Off</strong>
281 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
282Scattering <i>q qbar -> W^+- g</i>.
283Code 251.
284 
285 
286<br/><br/><strong>WeakBosonAndParton:qg2Wq</strong>  <input type="radio" name="26" value="on"><strong>On</strong>
287<input type="radio" name="26" value="off" checked="checked"><strong>Off</strong>
288 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
289Scattering <i>q g -> W^+- q</i>.
290Code 252.
291 
292 
293<br/><br/><strong>WeakBosonAndParton:ffbar2Wgm</strong>  <input type="radio" name="27" value="on"><strong>On</strong>
294<input type="radio" name="27" value="off" checked="checked"><strong>Off</strong>
295 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
296Scattering <i>f fbar -> W^+- gamma</i>.
297Code 253.
298 
299 
300<br/><br/><strong>WeakBosonAndParton:fgm2Wf</strong>  <input type="radio" name="28" value="on"><strong>On</strong>
301<input type="radio" name="28" value="off" checked="checked"><strong>Off</strong>
302 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
303Scattering <i>f gamma -> W^+- f</i>.
304Code 254.
305 
306
307<h3> Photon Collision Processes</h3>
308
309A few electroweak two-photon production processes are available.
310To use them, photon PDFs have to be defined for the incoming
311beam particles. For proton beams an appropriate set would be
312MRST QED 2004 [<a href="Bibliography.php" target="page">Mar05</a>], available in the LHAPDF library.
313
314<br/><br/><strong>PhotonCollision:all</strong>  <input type="radio" name="29" value="on"><strong>On</strong>
315<input type="radio" name="29" value="off" checked="checked"><strong>Off</strong>
316 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
317Common switch for the group of six processes presented below.
318 
319
320<br/><br/><strong>PhotonCollision:gmgm2qqbar</strong>  <input type="radio" name="30" value="on"><strong>On</strong>
321<input type="radio" name="30" value="off" checked="checked"><strong>Off</strong>
322 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
323Scatterings <i>gamma gamma -> q qbar</i>, where <i>q</i>
324is a light quark (<i>u, d, s</i>) .
325Code 261.
326 
327
328<br/><br/><strong>PhotonCollision:gmgm2ccbar</strong>  <input type="radio" name="31" value="on"><strong>On</strong>
329<input type="radio" name="31" value="off" checked="checked"><strong>Off</strong>
330 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
331Scattering <i>gamma gamma -> c cbar</i>.
332Code 262.
333 
334
335<br/><br/><strong>PhotonCollision:gmgm2bbbar</strong>  <input type="radio" name="32" value="on"><strong>On</strong>
336<input type="radio" name="32" value="off" checked="checked"><strong>Off</strong>
337 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
338Scattering <i>gamma gamma -> b bbar</i>.
339Code 263.
340 
341
342<br/><br/><strong>PhotonCollision:gmgm2ee</strong>  <input type="radio" name="33" value="on"><strong>On</strong>
343<input type="radio" name="33" value="off" checked="checked"><strong>Off</strong>
344 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
345Scattering <i>gamma gamma -> e+ e-</i>.
346Code 264.
347 
348
349<br/><br/><strong>PhotonCollision:gmgm2mumu</strong>  <input type="radio" name="34" value="on"><strong>On</strong>
350<input type="radio" name="34" value="off" checked="checked"><strong>Off</strong>
351 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
352Scattering <i>gamma gamma -> mu+ mu-</i>.
353Code 265.
354 
355
356<br/><br/><strong>PhotonCollision:gmgm2tautau</strong>  <input type="radio" name="35" value="on"><strong>On</strong>
357<input type="radio" name="35" value="off" checked="checked"><strong>Off</strong>
358 &nbsp;&nbsp;(<code>default = <strong>off</strong></code>)<br/>
359Scattering <i>gamma gamma -> tau+ tau-</i>.
360Code 266.
361 
362
363<input type="hidden" name="saved" value="1"/>
364
365<?php
366echo "<input type='hidden' name='filepath' value='".$_GET["filepath"]."'/>"?>
367
368<table width="100%"><tr><td align="right"><input type="submit" value="Save Settings" /></td></tr></table>
369</form>
370
371<?php
372
373if($_POST["saved"] == 1)
374{
375$filepath = $_POST["filepath"];
376$handle = fopen($filepath, 'a');
377
378if($_POST["1"] != "off")
379{
380$data = "PromptPhoton:all = ".$_POST["1"]."\n";
381fwrite($handle,$data);
382}
383if($_POST["2"] != "off")
384{
385$data = "PromptPhoton:qg2qgamma = ".$_POST["2"]."\n";
386fwrite($handle,$data);
387}
388if($_POST["3"] != "off")
389{
390$data = "PromptPhoton:qqbar2ggamma = ".$_POST["3"]."\n";
391fwrite($handle,$data);
392}
393if($_POST["4"] != "off")
394{
395$data = "PromptPhoton:gg2ggamma = ".$_POST["4"]."\n";
396fwrite($handle,$data);
397}
398if($_POST["5"] != "off")
399{
400$data = "PromptPhoton:ffbar2gammagamma = ".$_POST["5"]."\n";
401fwrite($handle,$data);
402}
403if($_POST["6"] != "off")
404{
405$data = "PromptPhoton:gg2gammagamma = ".$_POST["6"]."\n";
406fwrite($handle,$data);
407}
408if($_POST["7"] != "5")
409{
410$data = "PromptPhoton:nQuarkLoop = ".$_POST["7"]."\n";
411fwrite($handle,$data);
412}
413if($_POST["8"] != "0")
414{
415$data = "WeakZ0:gmZmode = ".$_POST["8"]."\n";
416fwrite($handle,$data);
417}
418if($_POST["9"] != "off")
419{
420$data = "WeakBosonExchange:all = ".$_POST["9"]."\n";
421fwrite($handle,$data);
422}
423if($_POST["10"] != "off")
424{
425$data = "WeakBosonExchange:ff2ff(t:gmZ) = ".$_POST["10"]."\n";
426fwrite($handle,$data);
427}
428if($_POST["11"] != "off")
429{
430$data = "WeakBosonExchange:ff2ff(t:W) = ".$_POST["11"]."\n";
431fwrite($handle,$data);
432}
433if($_POST["12"] != "off")
434{
435$data = "WeakSingleBoson:all = ".$_POST["12"]."\n";
436fwrite($handle,$data);
437}
438if($_POST["13"] != "off")
439{
440$data = "WeakSingleBoson:ffbar2gmZ = ".$_POST["13"]."\n";
441fwrite($handle,$data);
442}
443if($_POST["14"] != "off")
444{
445$data = "WeakSingleBoson:ffbar2W = ".$_POST["14"]."\n";
446fwrite($handle,$data);
447}
448if($_POST["15"] != "off")
449{
450$data = "WeakSingleBoson:ffbar2ffbar(s:gm) = ".$_POST["15"]."\n";
451fwrite($handle,$data);
452}
453if($_POST["16"] != "off")
454{
455$data = "WeakDoubleBoson:all = ".$_POST["16"]."\n";
456fwrite($handle,$data);
457}
458if($_POST["17"] != "off")
459{
460$data = "WeakDoubleBoson:ffbar2gmZgmZ = ".$_POST["17"]."\n";
461fwrite($handle,$data);
462}
463if($_POST["18"] != "off")
464{
465$data = "WeakDoubleBoson:ffbar2ZW = ".$_POST["18"]."\n";
466fwrite($handle,$data);
467}
468if($_POST["19"] != "off")
469{
470$data = "WeakDoubleBoson:ffbar2WW = ".$_POST["19"]."\n";
471fwrite($handle,$data);
472}
473if($_POST["20"] != "off")
474{
475$data = "WeakBosonAndParton:all = ".$_POST["20"]."\n";
476fwrite($handle,$data);
477}
478if($_POST["21"] != "off")
479{
480$data = "WeakBosonAndParton:qqbar2gmZg = ".$_POST["21"]."\n";
481fwrite($handle,$data);
482}
483if($_POST["22"] != "off")
484{
485$data = "WeakBosonAndParton:qg2gmZq = ".$_POST["22"]."\n";
486fwrite($handle,$data);
487}
488if($_POST["23"] != "off")
489{
490$data = "WeakBosonAndParton:ffbar2gmZgm = ".$_POST["23"]."\n";
491fwrite($handle,$data);
492}
493if($_POST["24"] != "off")
494{
495$data = "WeakBosonAndParton:fgm2gmZf = ".$_POST["24"]."\n";
496fwrite($handle,$data);
497}
498if($_POST["25"] != "off")
499{
500$data = "WeakBosonAndParton:qqbar2Wg = ".$_POST["25"]."\n";
501fwrite($handle,$data);
502}
503if($_POST["26"] != "off")
504{
505$data = "WeakBosonAndParton:qg2Wq = ".$_POST["26"]."\n";
506fwrite($handle,$data);
507}
508if($_POST["27"] != "off")
509{
510$data = "WeakBosonAndParton:ffbar2Wgm = ".$_POST["27"]."\n";
511fwrite($handle,$data);
512}
513if($_POST["28"] != "off")
514{
515$data = "WeakBosonAndParton:fgm2Wf = ".$_POST["28"]."\n";
516fwrite($handle,$data);
517}
518if($_POST["29"] != "off")
519{
520$data = "PhotonCollision:all = ".$_POST["29"]."\n";
521fwrite($handle,$data);
522}
523if($_POST["30"] != "off")
524{
525$data = "PhotonCollision:gmgm2qqbar = ".$_POST["30"]."\n";
526fwrite($handle,$data);
527}
528if($_POST["31"] != "off")
529{
530$data = "PhotonCollision:gmgm2ccbar = ".$_POST["31"]."\n";
531fwrite($handle,$data);
532}
533if($_POST["32"] != "off")
534{
535$data = "PhotonCollision:gmgm2bbbar = ".$_POST["32"]."\n";
536fwrite($handle,$data);
537}
538if($_POST["33"] != "off")
539{
540$data = "PhotonCollision:gmgm2ee = ".$_POST["33"]."\n";
541fwrite($handle,$data);
542}
543if($_POST["34"] != "off")
544{
545$data = "PhotonCollision:gmgm2mumu = ".$_POST["34"]."\n";
546fwrite($handle,$data);
547}
548if($_POST["35"] != "off")
549{
550$data = "PhotonCollision:gmgm2tautau = ".$_POST["35"]."\n";
551fwrite($handle,$data);
552}
553fclose($handle);
554}
555
556?>
557</body>
558</html>
559
560<!-- Copyright (C) 2012 Torbjorn Sjostrand -->
561
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