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first import of structure, PYTHIA8 and DELPHES
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2	<head>
3	<title>Spacelike Showers</title>
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29
30	<h2>Spacelike Showers</h2>
31
32	The PYTHIA algorithm for spacelike initial-state showers is
33	based on the article [<a href="Bibliography.php" target="page">Sjo05</a>], where a
34	transverse-momentum-ordered backwards evolution scheme is introduced,
35	with the extension to fully interleaved evolution covered in
36	[<a href="Bibliography.php" target="page">Cor10a</a>].
37	This algorithm is a further development of the virtuality-ordered one
38	presented in [<a href="Bibliography.php" target="page">Sj085</a>], with matching to first-order matrix
39	element for <i>Z^0</i>, <i>W^+-</i> and Higgs (in the
40	<i>m_t -> infinity</i> limit) production as introduced in
41	[<a href="Bibliography.php" target="page">Miu99</a>].
42
43	<p/>
44	The normal user is not expected to call <code>SpaceShower</code>
45	directly, but only have it called from <code>Pythia</code>,
46	via <code>PartonLevel</code>. Some of the parameters below,
47	in particular <code>SpaceShower:alphaSvalue</code>,
48	would be of interest for a tuning exercise, however.
49
50	<h3>Main variables</h3>
51
52	The maximum <i>pT</i> to be allowed in the shower evolution is
53	related to the nature of the hard process itself. It involves a
54	delicate balance between not doublecounting and not leaving any
55	gaps in the coverage. The best procedure may depend on information
56	only the user has: how the events were generated and mixed (e.g. with
57	Les Houches Accord external input), and how they are intended to be
58	used. Therefore a few options are available, with a sensible default
59	behaviour.
60
61	<br/><br/><table><tr><td><strong>SpaceShower:pTmaxMatch </td><td>   (<code>default = <strong>0</strong></code>; <code>minimum = 0</code>; <code>maximum = 2</code>)</td></tr></table>
62	Way in which the maximum shower evolution scale is set to match the
63	scale of the hard process itself.
64	<br/>
65	<input type="radio" name="1" value="0" checked="checked"><strong>0 </strong>: <b>(i)</b> if the final state of the hard process (not counting subsequent resonance decays) contains at least one quark (<ei>u, d, s, c ,b</ei>), gluon or photon then <ei>pT_max</ei> is chosen to be the factorization scale for internal processes and the <code>scale</code> value for Les Houches input; <b>(ii)</b> if not, emissions are allowed to go all the way up to the kinematical limit. The reasoning is that in the former set of processes the ISR emission of yet another quark, gluon or photon could lead to doublecounting, while no such danger exists in the latter case. <br/>
66	<input type="radio" name="1" value="1"><strong>1 </strong>: always use the factorization scale for an internal process and the <code>scale</code> value for Les Houches input, i.e. the lower value. This should avoid doublecounting, but may leave out some emissions that ought to have been simulated. (Also known as wimpy showers.) <br/>
67	<input type="radio" name="1" value="2"><strong>2 </strong>: always allow emissions up to the kinematical limit. This will simulate all possible event topologies, but may lead to doublecounting. (Also known as power showers.) <br/>
68	<br/><b>Note 1:</b> These options only apply to the hard interaction.
69	Emissions off subsequent multiparton interactions are always constrainted
70	to be below the factorization scale of the process itself.
71	<br/><b>Note 2:</b> Some processes contain matrix-element matching
72	to the first emission; this is the case notably for single
73	<ei>gamma^*/Z^0, W^+-</ei> and <ei>H^0</ei> production. Then default
74	and option 2 give the correct result, while option 1 should never
75	be used.
76
77	<br/><br/><table><tr><td><strong>SpaceShower:pTmaxFudge </td><td></td><td> <input type="text" name="2" value="1.0" size="20"/>   (<code>default = <strong>1.0</strong></code>; <code>minimum = 0.25</code>; <code>maximum = 2.0</code>)</td></tr></table>
78	In cases where the above <code>pTmaxMatch</code> rules would imply
79	that <i>pT_max = pT_factorization</i>, <code>pTmaxFudge</code>
80	introduces a multiplicative factor <i>f</i> such that instead
81	<i>pT_max = f * pT_factorization</i>. Only applies to the hardest
82	interaction in an event, cf. below. It is strongly suggested that
83	<i>f = 1</i>, but variations around this default can be useful to
84	test this assumption.
85
86
87	<br/><br/><table><tr><td><strong>SpaceShower:pTmaxFudgeMPI </td><td></td><td> <input type="text" name="3" value="1.0" size="20"/>   (<code>default = <strong>1.0</strong></code>; <code>minimum = 0.25</code>; <code>maximum = 2.0</code>)</td></tr></table>
88	A multiplicative factor <i>f</i> such that
89	<i>pT_max = f * pT_factorization</i>, as above, but here for the
90	non-hardest interactions (when multiparton interactions are allowed).
91
92
93	<br/><br/><table><tr><td><strong>SpaceShower:pTdampMatch </td><td>   (<code>default = <strong>0</strong></code>; <code>minimum = 0</code>; <code>maximum = 2</code>)</td></tr></table>
94	These options only take effect when a process is allowed to radiate up
95	to the kinematical limit by the above <code>pTmaxMatch</code> choice,
96	and no matrix-element corrections are available. Then, in many processes,
97	the fall-off in <ei>pT</ei> will be too slow by one factor of <ei>pT^2</ei>.
98	That is, while showers have an approximate <ei>dpT^2/pT^2</ei> shape, often
99	it should become more like <ei>dpT^2/pT^4</ei> at <ei>pT</ei> values above
100	the scale of the hard process. Whether this actually is the case
101	depends on the particular process studied, e.g. if <ei>t</ei>-channel
102	gluon exchange is likely to dominate. If so, the options below could
103	provide a reasonable high-<ei>pT</ei> behaviour without requiring
104	higher-order calculations.
105	<br/>
106	<input type="radio" name="4" value="0" checked="checked"><strong>0 </strong>: emissions go up to the kinematical limit, with no special dampening. <br/>
107	<input type="radio" name="4" value="1"><strong>1 </strong>: emissions go up to the kinematical limit, but dampened by a factor <ei>k^2 Q^2_fac/(pT^2 + k^2 Q^2_fac)</ei>, where <ei>Q_fac</ei> is the factorization scale and <ei>k</ei> is a multiplicative fudge factor stored in <code>pTdampFudge</code> below. <br/>
108	<input type="radio" name="4" value="2"><strong>2 </strong>: emissions go up to the kinematical limit, but dampened by a factor <ei>k^2 Q^2_ren/(pT^2 + k^2 Q^2_ren)</ei>, where <ei>Q_ren</ei> is the renormalization scale and <ei>k</ei> is a multiplicative fudge factor stored in <code>pTdampFudge</code> below. <br/>
109	<br/><b>Note:</b> These options only apply to the hard interaction.
110	Emissions off subsequent multiparton interactions are always constrainted
111	to be below the factorization scale of the process itself.
112
113	<br/><br/><table><tr><td><strong>SpaceShower:pTdampFudge </td><td></td><td> <input type="text" name="5" value="1.0" size="20"/>   (<code>default = <strong>1.0</strong></code>; <code>minimum = 0.25</code>; <code>maximum = 4.0</code>)</td></tr></table>
114	In cases 1 and 2 above, where a dampening is imposed at around the
115	factorization or renormalization scale, respectively, this allows the
116	<i>pT</i> scale of dampening of radiation by a half to be shifted
117	by this factor relative to the default <i>Q_fac</i> or <i>Q_ren</i>.
118	This number ought to be in the neighbourhood of unity, but variations
119	away from this value could do better in some processes.
120
121
122	<p/>
123	The amount of QCD radiation in the shower is determined by
124	<br/><br/><table><tr><td><strong>SpaceShower:alphaSvalue </td><td></td><td> <input type="text" name="6" value="0.137" size="20"/>   (<code>default = <strong>0.137</strong></code>; <code>minimum = 0.06</code>; <code>maximum = 0.25</code>)</td></tr></table>
125	The <i>alpha_strong</i> value at scale <code>M_Z^2</code>.
126	Default value is picked equal to the one used in CTEQ 5L.
127
128
129	<p/>
130	The actual value is then regulated by the running to the scale
131	<i>pT^2</i>, at which it is evaluated
132	<br/><br/><table><tr><td><strong>SpaceShower:alphaSorder </td><td>   (<code>default = <strong>1</strong></code>; <code>minimum = 0</code>; <code>maximum = 2</code>)</td></tr></table>
133	Order at which <ei>alpha_strong</ei> runs,
134	<br/>
135	<input type="radio" name="7" value="0"><strong>0 </strong>: zeroth order, i.e. <ei>alpha_strong</ei> is kept fixed.<br/>
136	<input type="radio" name="7" value="1" checked="checked"><strong>1 </strong>: first order, which is the normal value.<br/>
137	<input type="radio" name="7" value="2"><strong>2 </strong>: second order. Since other parts of the code do not go to second order there is no strong reason to use this option, but there is also nothing wrong with it.<br/>
138
139	<p/>
140	QED radiation is regulated by the <i>alpha_electromagnetic</i>
141	value at the <i>pT^2</i> scale of a branching.
142
143	<br/><br/><table><tr><td><strong>SpaceShower:alphaEMorder </td><td>   (<code>default = <strong>1</strong></code>; <code>minimum = -1</code>; <code>maximum = 1</code>)</td></tr></table>
144	The running of <ei>alpha_em</ei>.
145	<br/>
146	<input type="radio" name="8" value="1" checked="checked"><strong>1 </strong>: first-order running, constrained to agree with <code>StandardModel:alphaEMmZ</code> at the <ei>Z^0</ei> mass. <br/>
147	<input type="radio" name="8" value="0"><strong>0 </strong>: zeroth order, i.e. <ei>alpha_em</ei> is kept fixed at its value at vanishing momentum transfer.<br/>
148	<input type="radio" name="8" value="-1"><strong>-1 </strong>: zeroth order, i.e. <ei>alpha_em</ei> is kept fixed, but at <code>StandardModel:alphaEMmZ</code>, i.e. its value at the <ei>Z^0</ei> mass. <br/>
149
150	<p/>
151	The natural scale for couplings and PDFs is <i>pT^2</i>. To explore
152	uncertainties it is possibly to vary around this value, however, in
153	analogy with what can be done for
154	<?php $filepath = $_GET["filepath"];
155	echo "<a href='CouplingsAndScales.php?filepath=".$filepath."' target='page'>";?>hard processes</a>.
156
157	<br/><br/><table><tr><td><strong>SpaceShower:renormMultFac </td><td></td><td> <input type="text" name="9" value="1." size="20"/>   (<code>default = <strong>1.</strong></code>; <code>minimum = 0.1</code>; <code>maximum = 10.</code>)</td></tr></table>
158	The default <i>pT^2</i> renormalization scale is multiplied by
159	this prefactor. For QCD this is equivalent to a change of
160	<i>Lambda^2</i> in the opposite direction, i.e. to a change of
161	<i>alpha_strong(M_Z^2)</i> (except that flavour thresholds
162	remain at fixed scales). Below, when <i>pT^2 + pT_0^2</i> is used
163	as scale, it is this whole expression that is multiplied by the prefactor.
164
165
166	<br/><br/><table><tr><td><strong>SpaceShower:factorMultFac </td><td></td><td> <input type="text" name="10" value="1." size="20"/>   (<code>default = <strong>1.</strong></code>; <code>minimum = 0.1</code>; <code>maximum = 10.</code>)</td></tr></table>
167	The default <i>pT^2</i> factorization scale is multiplied by
168	this prefactor.
169
170
171	<p/>
172	There are two complementary ways of regularizing the small-<i>pT</i>
173	divergence, a sharp cutoff and a smooth dampening. These can be
174	combined as desired but it makes sense to coordinate with how the
175	same issue is handled in multiparton interactions.
176
177	<br/><br/><strong>SpaceShower:samePTasMPI</strong> <input type="radio" name="11" value="on"><strong>On</strong>
178	<input type="radio" name="11" value="off" checked="checked"><strong>Off</strong>
179	(<code>default = <strong>off</strong></code>)<br/>
180	Regularize the <i>pT -> 0</i> divergence using the same sharp cutoff
181	and smooth dampening parameters as used to describe multiparton interactions.
182	That is, the <code>MultipartonInteractions:pT0Ref</code>,
183	<code>MultipartonInteractions:ecmRef</code>,
184	<code>MultipartonInteractions:ecmPow</code> and
185	<code>MultipartonInteractions:pTmin</code> parameters are used to regularize
186	all ISR QCD radiation, rather than the corresponding parameters below.
187	This is a sensible physics ansatz, based on the assumption that colour
188	screening effects influence both MPI and ISR in the same way. Photon
189	radiation is regularized separately in either case.
190	<br/><b>Warning:</b> if a large <code>pT0</code> is picked for multiparton
191	interactions, such that the integrated interaction cross section is
192	below the nondiffractive inelastic one, this <code>pT0</code> will
193	automatically be scaled down to cope. Information on such a rescaling
194	does NOT propagate to <code>SpaceShower</code>, however.
195
196
197	<p/>
198	The actual <code>pT0</code> parameter used at a given CM energy scale,
199	<i>ecmNow</i>, is obtained as
200	<br/><i>
201	pT0 = pT0(ecmNow) = pT0Ref * (ecmNow / ecmRef)^ecmPow
202	</i><br/>
203	where <i>pT0Ref</i>, <i>ecmRef</i> and <i>ecmPow</i> are the
204	three parameters below.
205
206	<br/><br/><table><tr><td><strong>SpaceShower:pT0Ref </td><td></td><td> <input type="text" name="12" value="2.0" size="20"/>   (<code>default = <strong>2.0</strong></code>; <code>minimum = 0.5</code>; <code>maximum = 10.0</code>)</td></tr></table>
207	Regularization of the divergence of the QCD emission probability for
208	<i>pT -> 0</i> is obtained by a factor <i>pT^2 / (pT0^2 + pT^2)</i>,
209	and by using an <i>alpha_s(pT0^2 + pT^2)</i>. An energy dependence
210	of the <i>pT0</i> choice is introduced by the next two parameters,
211	so that <i>pT0Ref</i> is the <i>pT0</i> value for the reference
212	cm energy, <i>pT0Ref = pT0(ecmRef)</i>.
213
214
215	<br/><br/><table><tr><td><strong>SpaceShower:ecmRef </td><td></td><td> <input type="text" name="13" value="1800.0" size="20"/>   (<code>default = <strong>1800.0</strong></code>; <code>minimum = 1.</code>)</td></tr></table>
216	The <i>ecmRef</i> reference energy scale introduced above.
217
218
219	<br/><br/><table><tr><td><strong>SpaceShower:ecmPow </td><td></td><td> <input type="text" name="14" value="0.0" size="20"/>   (<code>default = <strong>0.0</strong></code>; <code>minimum = 0.</code>; <code>maximum = 0.5</code>)</td></tr></table>
220	The <i>ecmPow</i> energy rescaling pace introduced above.
221
222
223	<br/><br/><table><tr><td><strong>SpaceShower:pTmin </td><td></td><td> <input type="text" name="15" value="0.2" size="20"/>   (<code>default = <strong>0.2</strong></code>; <code>minimum = 0.1</code>; <code>maximum = 10.0</code>)</td></tr></table>
224	Lower cutoff in <i>pT</i>, below which no further ISR branchings
225	are allowed. Normally the <i>pT0</i> above would be used to
226	provide the main regularization of the branching rate for
227	<i>pT -> 0</i>, in which case <i>pTmin</i> is used mainly for
228	technical reasons. It is possible, however, to set <i>pT0Ref = 0</i>
229	and use <i>pTmin</i> to provide a step-function regularization,
230	or to combine them in intermediate approaches. Currently <i>pTmin</i>
231	is taken to be energy-independent.
232
233
234	<br/><br/><table><tr><td><strong>SpaceShower:pTminChgQ </td><td></td><td> <input type="text" name="16" value="0.5" size="20"/>   (<code>default = <strong>0.5</strong></code>; <code>minimum = 0.01</code>)</td></tr></table>
235	Parton shower cut-off <i>pT</i> for photon coupling to a coloured
236	particle.
237
238
239	<br/><br/><table><tr><td><strong>SpaceShower:pTminChgL </td><td></td><td> <input type="text" name="17" value="0.0005" size="20"/>   (<code>default = <strong>0.0005</strong></code>; <code>minimum = 0.0001</code>)</td></tr></table>
240	Parton shower cut-off mass for pure QED branchings.
241	Assumed smaller than (or equal to) <i>pTminChgQ</i>.
242
243
244	<br/><br/><strong>SpaceShower:rapidityOrder</strong> <input type="radio" name="18" value="on"><strong>On</strong>
245	<input type="radio" name="18" value="off" checked="checked"><strong>Off</strong>
246	(<code>default = <strong>off</strong></code>)<br/>
247	Force emissions, after the first, to be ordered in rapidity,
248	i.e. in terms of decreasing angles in a backwards-evolution sense.
249	Could be used to probe sensitivity to unordered emissions.
250	Only affects QCD emissions.
251
252
253	<h3>Further variables</h3>
254
255	These should normally not be touched. Their only function is for
256	cross-checks.
257
258	<p/>
259	There are three flags you can use to switch on or off selected
260	branchings in the shower:
261
262	<br/><br/><strong>SpaceShower:QCDshower</strong> <input type="radio" name="19" value="on" checked="checked"><strong>On</strong>
263	<input type="radio" name="19" value="off"><strong>Off</strong>
264	(<code>default = <strong>on</strong></code>)<br/>
265	Allow a QCD shower; on/off = true/false.
266
267
268	<br/><br/><strong>SpaceShower:QEDshowerByQ</strong> <input type="radio" name="20" value="on" checked="checked"><strong>On</strong>
269	<input type="radio" name="20" value="off"><strong>Off</strong>
270	(<code>default = <strong>on</strong></code>)<br/>
271	Allow quarks to radiate photons; on/off = true/false.
272
273
274	<br/><br/><strong>SpaceShower:QEDshowerByL</strong> <input type="radio" name="21" value="on" checked="checked"><strong>On</strong>
275	<input type="radio" name="21" value="off"><strong>Off</strong>
276	(<code>default = <strong>on</strong></code>)<br/>
277	Allow leptons to radiate photons; on/off = true/false.
278
279
280	<p/>
281	There are some further possibilities to modify the shower:
282
283	<br/><br/><strong>SpaceShower:MEcorrections</strong> <input type="radio" name="22" value="on" checked="checked"><strong>On</strong>
284	<input type="radio" name="22" value="off"><strong>Off</strong>
285	(<code>default = <strong>on</strong></code>)<br/>
286	Use of matrix element corrections; on/off = true/false.
287
288
289	<br/><br/><strong>SpaceShower:MEafterFirst</strong> <input type="radio" name="23" value="on" checked="checked"><strong>On</strong>
290	<input type="radio" name="23" value="off"><strong>Off</strong>
291	(<code>default = <strong>on</strong></code>)<br/>
292	Use of matrix element corrections also after the first emission,
293	for dipole ends of the same system that did not yet radiate.
294	Only has a meaning if <code>MEcorrections</code> above is
295	switched on.
296
297
298	<br/><br/><strong>SpaceShower:phiPolAsym</strong> <input type="radio" name="24" value="on" checked="checked"><strong>On</strong>
299	<input type="radio" name="24" value="off"><strong>Off</strong>
300	(<code>default = <strong>on</strong></code>)<br/>
301	Azimuthal asymmetry induced by gluon polarization; on/off = true/false.
302
303
304	<br/><br/><strong>SpaceShower:phiIntAsym</strong> <input type="radio" name="25" value="on" checked="checked"><strong>On</strong>
305	<input type="radio" name="25" value="off"><strong>Off</strong>
306	(<code>default = <strong>on</strong></code>)<br/>
307	Azimuthal asymmetry induced by interference; on/off = true/false.
308
309
310	<br/><br/><table><tr><td><strong>SpaceShower:strengthIntAsym </td><td></td><td> <input type="text" name="26" value="0.7" size="20"/>   (<code>default = <strong>0.7</strong></code>; <code>minimum = 0.</code>; <code>maximum = 0.9</code>)</td></tr></table>
311	Size of asymmetry induced by interference. Natural value of order 0.5;
312	expression would blow up for a value of 1.
313
314
315	<br/><br/><table><tr><td><strong>SpaceShower:nQuarkIn </td><td></td><td> <input type="text" name="27" value="5" size="20"/>   (<code>default = <strong>5</strong></code>; <code>minimum = 0</code>; <code>maximum = 5</code>)</td></tr></table>
316	Number of allowed quark flavours in <i>g -> q qbar</i> branchings,
317	when kinematically allowed, and thereby also in incoming beams.
318	Changing it to 4 would forbid <i>g -> b bbar</i>, etc.
319
320
321	<h3>Technical notes</h3>
322
323	Almost everything is equivalent to the algorithm in [1]. Minor changes
324	are as follows.
325	<ul>
326	<li>
327	It is now possible to have a second-order running <i>alpha_s</i>,
328	in addition to fixed or first-order running.
329	</li>
330	<li>
331	The description of heavy flavour production in the threshold region
332	has been modified, so as to be more forgiving about mismatches
333	between the <i>c/b</i> masses used in Pythia relative to those
334	used in a respective PDF parametrization. The basic idea is that,
335	in the threshold region of a heavy quark <i>Q</i>, <i>Q = c/b</i>,
336	the effect of subsequent <i>Q -> Q g</i> branchings is negligible.
337	If so, then
338	<br/><i>
339	f_Q(x, pT2) = integral_mQ2^pT2 dpT'2/pT'2 * alpha_s(pT'2)/2pi
340	* integral P(z) g(x', pT'2) delta(x - z x')
341	</i><br/>
342	so use this to select the <i>pT2</i> of the <i>g -> Q Qbar</i>
343	branching. In the old formalism the same kind of behaviour should
344	be obtained, but by a cancellation of a <i>1/f_Q</i> that diverges
345	at the theshold and a Sudakov that vanishes.
346	<br/>
347	The strategy therefore is that, once <i>pT2 < f * mQ2</i>, with
348	<i>f</i> a parameter of the order of 2, a <i>pT2</i> is chosen
349	like <i>dpT2/pT2</i> between <i>mQ2</i> and <i>f * mQ2</i>, a
350	nd a <i>z</i> flat in the allowed range. Thereafter acceptance
351	is based on the product of three factors, representing the running
352	of <i>alpha_strong</i>, the splitting kernel (including the mass term)
353	and the gluon density weight. At failure, a new <i>pT2</i> is chosen
354	in the same range, i.e. is not required to be lower since no Sudakov
355	is involved.
356	</li>
357	<li>
358	The QED algorithm now allows for hadron beams with non-zero photon
359	content. The backwards-evolution of a photon in a hadron is identical
360	to that of a gluon, with <i>CF -> eq^2</i> and <i>CA -> 0</i>.
361	Note that this will only work in conjunction with
362	parton distribution that explicitly include photons as part of the
363	hadron structure (such as the MRST2004qed set). Since Pythia's
364	internal sets do not allow for photon content in hadrons, it is thus
365	necessary to use the LHAPDF interface to make use of this feature. The
366	possibility of a fermion backwards-evolving to a photon has not yet
367	been included, nor has photon backwards-evolution in lepton beams.
368	</li>
369	</ul>
370
371	<input type="hidden" name="saved" value="1"/>
372
373	<?php
374	echo "<input type='hidden' name='filepath' value='".$_GET["filepath"]."'/>"?>
375
376	<table width="100%"><tr><td align="right"><input type="submit" value="Save Settings" /></td></tr></table>
377	</form>
378
379	<?php
380
381	if($_POST["saved"] == 1)
382	{
383	$filepath = $_POST["filepath"];
384	$handle = fopen($filepath, 'a');
385
386	if($_POST["1"] != "0")
387	{
388	$data = "SpaceShower:pTmaxMatch = ".$_POST["1"]."\n";
389	fwrite($handle,$data);
390	}
391	if($_POST["2"] != "1.0")
392	{
393	$data = "SpaceShower:pTmaxFudge = ".$_POST["2"]."\n";
394	fwrite($handle,$data);
395	}
396	if($_POST["3"] != "1.0")
397	{
398	$data = "SpaceShower:pTmaxFudgeMPI = ".$_POST["3"]."\n";
399	fwrite($handle,$data);
400	}
401	if($_POST["4"] != "0")
402	{
403	$data = "SpaceShower:pTdampMatch = ".$_POST["4"]."\n";
404	fwrite($handle,$data);
405	}
406	if($_POST["5"] != "1.0")
407	{
408	$data = "SpaceShower:pTdampFudge = ".$_POST["5"]."\n";
409	fwrite($handle,$data);
410	}
411	if($_POST["6"] != "0.137")
412	{
413	$data = "SpaceShower:alphaSvalue = ".$_POST["6"]."\n";
414	fwrite($handle,$data);
415	}
416	if($_POST["7"] != "1")
417	{
418	$data = "SpaceShower:alphaSorder = ".$_POST["7"]."\n";
419	fwrite($handle,$data);
420	}
421	if($_POST["8"] != "1")
422	{
423	$data = "SpaceShower:alphaEMorder = ".$_POST["8"]."\n";
424	fwrite($handle,$data);
425	}
426	if($_POST["9"] != "1.")
427	{
428	$data = "SpaceShower:renormMultFac = ".$_POST["9"]."\n";
429	fwrite($handle,$data);
430	}
431	if($_POST["10"] != "1.")
432	{
433	$data = "SpaceShower:factorMultFac = ".$_POST["10"]."\n";
434	fwrite($handle,$data);
435	}
436	if($_POST["11"] != "off")
437	{
438	$data = "SpaceShower:samePTasMPI = ".$_POST["11"]."\n";
439	fwrite($handle,$data);
440	}
441	if($_POST["12"] != "2.0")
442	{
443	$data = "SpaceShower:pT0Ref = ".$_POST["12"]."\n";
444	fwrite($handle,$data);
445	}
446	if($_POST["13"] != "1800.0")
447	{
448	$data = "SpaceShower:ecmRef = ".$_POST["13"]."\n";
449	fwrite($handle,$data);
450	}
451	if($_POST["14"] != "0.0")
452	{
453	$data = "SpaceShower:ecmPow = ".$_POST["14"]."\n";
454	fwrite($handle,$data);
455	}
456	if($_POST["15"] != "0.2")
457	{
458	$data = "SpaceShower:pTmin = ".$_POST["15"]."\n";
459	fwrite($handle,$data);
460	}
461	if($_POST["16"] != "0.5")
462	{
463	$data = "SpaceShower:pTminChgQ = ".$_POST["16"]."\n";
464	fwrite($handle,$data);
465	}
466	if($_POST["17"] != "0.0005")
467	{
468	$data = "SpaceShower:pTminChgL = ".$_POST["17"]."\n";
469	fwrite($handle,$data);
470	}
471	if($_POST["18"] != "off")
472	{
473	$data = "SpaceShower:rapidityOrder = ".$_POST["18"]."\n";
474	fwrite($handle,$data);
475	}
476	if($_POST["19"] != "on")
477	{
478	$data = "SpaceShower:QCDshower = ".$_POST["19"]."\n";
479	fwrite($handle,$data);
480	}
481	if($_POST["20"] != "on")
482	{
483	$data = "SpaceShower:QEDshowerByQ = ".$_POST["20"]."\n";
484	fwrite($handle,$data);
485	}
486	if($_POST["21"] != "on")
487	{
488	$data = "SpaceShower:QEDshowerByL = ".$_POST["21"]."\n";
489	fwrite($handle,$data);
490	}
491	if($_POST["22"] != "on")
492	{
493	$data = "SpaceShower:MEcorrections = ".$_POST["22"]."\n";
494	fwrite($handle,$data);
495	}
496	if($_POST["23"] != "on")
497	{
498	$data = "SpaceShower:MEafterFirst = ".$_POST["23"]."\n";
499	fwrite($handle,$data);
500	}
501	if($_POST["24"] != "on")
502	{
503	$data = "SpaceShower:phiPolAsym = ".$_POST["24"]."\n";
504	fwrite($handle,$data);
505	}
506	if($_POST["25"] != "on")
507	{
508	$data = "SpaceShower:phiIntAsym = ".$_POST["25"]."\n";
509	fwrite($handle,$data);
510	}
511	if($_POST["26"] != "0.7")
512	{
513	$data = "SpaceShower:strengthIntAsym = ".$_POST["26"]."\n";
514	fwrite($handle,$data);
515	}
516	if($_POST["27"] != "5")
517	{
518	$data = "SpaceShower:nQuarkIn = ".$_POST["27"]."\n";
519	fwrite($handle,$data);
520	}
521	fclose($handle);
522	}
523
524	?>
525	</body>
526	</html>
527
528	<!-- Copyright (C) 2012 Torbjorn Sjostrand -->
529

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