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1<html>
2<head>
3 <meta HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
4 <meta NAME="keywords" CONTENT="root, tree, ntuple, format, description">
5 <title>root tree description</title>
6</head>
7<body>
8<H1>root tree description</H1>
9<hr>
10<H2>Classes</H2>
11<hr>
12<table style="border: 1px dotted;" align="center" border="0" cellpadding="7" cellspacing="3" widt="95%">
13<tr><td><b>Parameter</b></td>
14<td><b>Definition</b></td>
15<td><b>How it was calculated</b></td></tr>
16<tr bgcolor="#ffffff"><td colspan=3><hr><a name="Event"><H3>Event</H3><hr></td></tr>
17<tr bgcolor="#eeeeee">
18 <td>Number</td>
19 <td>event number</td>
20 <td></td>
21</tr>
22<tr bgcolor="#ffffff"><td colspan=3><hr><a name="LHCOEvent"><H3>LHCOEvent</H3><hr></td></tr>
23<tr bgcolor="#ffffff">
24 <td><a href="#Event">Event</a></td>
25 <td>LHCOEvent inherits all Event parameters</td>
26 <td></td>
27</tr>
28<tr bgcolor="#eeeeee">
29 <td>Trigger</td>
30 <td>trigger word</td>
31 <td></td>
32</tr>
33<tr bgcolor="#ffffff"><td colspan=3><hr><a name="LHEFEvent"><H3>LHEFEvent</H3><hr></td></tr>
34<tr bgcolor="#ffffff">
35 <td><a href="#Event">Event</a></td>
36 <td>LHEFEvent inherits all Event parameters</td>
37 <td></td>
38</tr>
39<tr bgcolor="#eeeeee">
40 <td>ProcessID</td>
41 <td>subprocess code for the event </td>
42 <td> hepup.IDPRUP</td>
43</tr>
44<tr bgcolor="#ffffff">
45 <td>Weight</td>
46 <td>weight for the event </td>
47 <td> hepup.XWGTUP</td>
48</tr>
49<tr bgcolor="#eeeeee">
50 <td>ScalePDF</td>
51 <td>scale in GeV used in the calculation of the PDFs in the event </td>
52 <td> hepup.SCALUP</td>
53</tr>
54<tr bgcolor="#ffffff">
55 <td>AlphaQED</td>
56 <td>value of the QED coupling used in the event </td>
57 <td> hepup.AQEDUP</td>
58</tr>
59<tr bgcolor="#eeeeee">
60 <td>AlphaQCD</td>
61 <td>value of the QCD coupling used in the event </td>
62 <td> hepup.AQCDUP</td>
63</tr>
64<tr bgcolor="#ffffff"><td colspan=3><hr><a name="HepMCEvent"><H3>HepMCEvent</H3><hr></td></tr>
65<tr bgcolor="#ffffff">
66 <td><a href="#Event">Event</a></td>
67 <td>HepMCEvent inherits all Event parameters</td>
68 <td></td>
69</tr>
70<tr bgcolor="#eeeeee">
71 <td>ProcessID</td>
72 <td>unique signal process id </td>
73 <td> signal_process_id()</td>
74</tr>
75<tr bgcolor="#ffffff">
76 <td>MPI</td>
77 <td>number of multi parton interactions </td>
78 <td> mpi () </td>
79</tr>
80<tr bgcolor="#eeeeee">
81 <td>Weight</td>
82 <td>weight for the event</td>
83 <td></td>
84</tr>
85<tr bgcolor="#ffffff">
86 <td>Scale</td>
87 <td>energy scale, see hep-ph/0109068 </td>
88 <td> event_scale()</td>
89</tr>
90<tr bgcolor="#eeeeee">
91 <td>AlphaQED</td>
92 <td>QED coupling, see hep-ph/0109068 </td>
93 <td> alphaQED()</td>
94</tr>
95<tr bgcolor="#ffffff">
96 <td>AlphaQCD</td>
97 <td>QCD coupling, see hep-ph/0109068 </td>
98 <td> alphaQCD()</td>
99</tr>
100<tr bgcolor="#eeeeee">
101 <td>ID1</td>
102 <td>flavour code of first parton </td>
103 <td> pdf_info()->id1()</td>
104</tr>
105<tr bgcolor="#ffffff">
106 <td>ID2</td>
107 <td>flavour code of second parton </td>
108 <td> pdf_info()->id2() </td>
109</tr>
110<tr bgcolor="#eeeeee">
111 <td>X1</td>
112 <td>fraction of beam momentum carried by first parton ("beam side") </td>
113 <td> pdf_info()->x1()</td>
114</tr>
115<tr bgcolor="#ffffff">
116 <td>X2</td>
117 <td>fraction of beam momentum carried by second parton ("target side") </td>
118 <td> pdf_info()->x2()</td>
119</tr>
120<tr bgcolor="#eeeeee">
121 <td>ScalePDF</td>
122 <td>Q-scale used in evaluation of PDF's (in GeV) </td>
123 <td> pdf_info()->scalePDF()</td>
124</tr>
125<tr bgcolor="#ffffff">
126 <td>PDF1</td>
127 <td>PDF (id1, x1, Q) </td>
128 <td> pdf_info()->pdf1()</td>
129</tr>
130<tr bgcolor="#eeeeee">
131 <td>PDF2</td>
132 <td>PDF (id2, x2, Q) </td>
133 <td> pdf_info()->pdf2()</td>
134</tr>
135<tr bgcolor="#ffffff"><td colspan=3><hr><a name="GenParticle"><H3>GenParticle</H3><hr></td></tr>
136<tr bgcolor="#eeeeee">
137 <td>PID</td>
138 <td>particle HEP ID number </td>
139 <td> hepevt.idhep[number]</td>
140</tr>
141<tr bgcolor="#ffffff">
142 <td>Status</td>
143 <td>particle status </td>
144 <td> hepevt.isthep[number]</td>
145</tr>
146<tr bgcolor="#eeeeee">
147 <td>IsPU</td>
148 <td>0 or 1 for particles from pile-up interactions</td>
149 <td></td>
150</tr>
151<tr bgcolor="#ffffff">
152 <td>M1</td>
153 <td>particle 1st mother </td>
154 <td> hepevt.jmohep[number][0] - 1</td>
155</tr>
156<tr bgcolor="#eeeeee">
157 <td>M2</td>
158 <td>particle 2nd mother </td>
159 <td> hepevt.jmohep[number][1] - 1</td>
160</tr>
161<tr bgcolor="#ffffff">
162 <td>D1</td>
163 <td>particle 1st daughter </td>
164 <td> hepevt.jdahep[number][0] - 1</td>
165</tr>
166<tr bgcolor="#eeeeee">
167 <td>D2</td>
168 <td>particle last daughter </td>
169 <td> hepevt.jdahep[number][1] - 1</td>
170</tr>
171<tr bgcolor="#ffffff">
172 <td>Charge</td>
173 <td>particle charge</td>
174 <td></td>
175</tr>
176<tr bgcolor="#eeeeee">
177 <td>Mass</td>
178 <td>particle mass</td>
179 <td></td>
180</tr>
181<tr bgcolor="#ffffff">
182 <td>E</td>
183 <td>particle energy </td>
184 <td> hepevt.phep[number][3]</td>
185</tr>
186<tr bgcolor="#eeeeee">
187 <td>Px</td>
188 <td>particle momentum vector (x component) </td>
189 <td> hepevt.phep[number][0]</td>
190</tr>
191<tr bgcolor="#ffffff">
192 <td>Py</td>
193 <td>particle momentum vector (y component) </td>
194 <td> hepevt.phep[number][1]</td>
195</tr>
196<tr bgcolor="#eeeeee">
197 <td>Pz</td>
198 <td>particle momentum vector (z component) </td>
199 <td> hepevt.phep[number][2]</td>
200</tr>
201<tr bgcolor="#ffffff">
202 <td>PT</td>
203 <td>particle transverse momentum</td>
204 <td></td>
205</tr>
206<tr bgcolor="#eeeeee">
207 <td>Eta</td>
208 <td>particle pseudorapidity</td>
209 <td></td>
210</tr>
211<tr bgcolor="#ffffff">
212 <td>Phi</td>
213 <td>particle azimuthal angle</td>
214 <td></td>
215</tr>
216<tr bgcolor="#eeeeee">
217 <td>Rapidity</td>
218 <td>particle rapidity</td>
219 <td></td>
220</tr>
221<tr bgcolor="#ffffff">
222 <td>T</td>
223 <td>particle vertex position (t component) </td>
224 <td> hepevt.vhep[number][3]</td>
225</tr>
226<tr bgcolor="#eeeeee">
227 <td>X</td>
228 <td>particle vertex position (x component) </td>
229 <td> hepevt.vhep[number][0]</td>
230</tr>
231<tr bgcolor="#ffffff">
232 <td>Y</td>
233 <td>particle vertex position (y component) </td>
234 <td> hepevt.vhep[number][1]</td>
235</tr>
236<tr bgcolor="#eeeeee">
237 <td>Z</td>
238 <td>particle vertex position (z component) </td>
239 <td> hepevt.vhep[number][2]</td>
240</tr>
241<tr bgcolor="#ffffff"><td colspan=3><hr><a name="MissingET"><H3>MissingET</H3><hr></td></tr>
242<tr bgcolor="#eeeeee">
243 <td>MET</td>
244 <td>mising transverse energy</td>
245 <td></td>
246</tr>
247<tr bgcolor="#ffffff">
248 <td>Phi</td>
249 <td>mising energy azimuthal angle</td>
250 <td></td>
251</tr>
252<tr bgcolor="#ffffff"><td colspan=3><hr><a name="ScalarHT"><H3>ScalarHT</H3><hr></td></tr>
253<tr bgcolor="#eeeeee">
254 <td>HT</td>
255 <td>scalar sum of transverse momenta</td>
256 <td></td>
257</tr>
258<tr bgcolor="#ffffff"><td colspan=3><hr><a name="Rho"><H3>Rho</H3><hr></td></tr>
259<tr bgcolor="#eeeeee">
260 <td>Rho</td>
261 <td>rho energy density</td>
262 <td></td>
263</tr>
264<tr bgcolor="#ffffff"><td colspan=3><hr><a name="Photon"><H3>Photon</H3><hr></td></tr>
265<tr bgcolor="#eeeeee">
266 <td>PT</td>
267 <td>photon transverse momentum</td>
268 <td></td>
269</tr>
270<tr bgcolor="#ffffff">
271 <td>Eta</td>
272 <td>photon pseudorapidity</td>
273 <td></td>
274</tr>
275<tr bgcolor="#eeeeee">
276 <td>Phi</td>
277 <td>photon azimuthal angle</td>
278 <td></td>
279</tr>
280<tr bgcolor="#ffffff">
281 <td>E</td>
282 <td>photon energy</td>
283 <td></td>
284</tr>
285<tr bgcolor="#eeeeee">
286 <td>EhadOverEem</td>
287 <td>ratio of the hadronic versus electromagnetic energy deposited in the calorimeter</td>
288 <td></td>
289</tr>
290<tr bgcolor="#ffffff">
291 <td>Particles</td>
292 <td>references to generated particles</td>
293 <td></td>
294</tr>
295<tr bgcolor="#ffffff"><td colspan=3><hr><a name="Electron"><H3>Electron</H3><hr></td></tr>
296<tr bgcolor="#eeeeee">
297 <td>PT</td>
298 <td>electron transverse momentum</td>
299 <td></td>
300</tr>
301<tr bgcolor="#ffffff">
302 <td>Eta</td>
303 <td>electron pseudorapidity</td>
304 <td></td>
305</tr>
306<tr bgcolor="#eeeeee">
307 <td>Phi</td>
308 <td>electron azimuthal angle</td>
309 <td></td>
310</tr>
311<tr bgcolor="#ffffff">
312 <td>Charge</td>
313 <td>electron charge</td>
314 <td></td>
315</tr>
316<tr bgcolor="#eeeeee">
317 <td>EhadOverEem</td>
318 <td>ratio of the hadronic versus electromagnetic energy deposited in the calorimeter</td>
319 <td></td>
320</tr>
321<tr bgcolor="#ffffff">
322 <td>Particle</td>
323 <td>reference to generated particle</td>
324 <td></td>
325</tr>
326<tr bgcolor="#ffffff"><td colspan=3><hr><a name="Muon"><H3>Muon</H3><hr></td></tr>
327<tr bgcolor="#eeeeee">
328 <td>PT</td>
329 <td>muon transverse momentum</td>
330 <td></td>
331</tr>
332<tr bgcolor="#ffffff">
333 <td>Eta</td>
334 <td>muon pseudorapidity</td>
335 <td></td>
336</tr>
337<tr bgcolor="#eeeeee">
338 <td>Phi</td>
339 <td>muon azimuthal angle</td>
340 <td></td>
341</tr>
342<tr bgcolor="#ffffff">
343 <td>Charge</td>
344 <td>muon charge</td>
345 <td></td>
346</tr>
347<tr bgcolor="#eeeeee">
348 <td>Particle</td>
349 <td>reference to generated particle</td>
350 <td></td>
351</tr>
352<tr bgcolor="#ffffff"><td colspan=3><hr><a name="Jet"><H3>Jet</H3><hr></td></tr>
353<tr bgcolor="#eeeeee">
354 <td>PT</td>
355 <td>jet transverse momentum</td>
356 <td></td>
357</tr>
358<tr bgcolor="#ffffff">
359 <td>Eta</td>
360 <td>jet pseudorapidity</td>
361 <td></td>
362</tr>
363<tr bgcolor="#eeeeee">
364 <td>Phi</td>
365 <td>jet azimuthal angle</td>
366 <td></td>
367</tr>
368<tr bgcolor="#ffffff">
369 <td>Mass</td>
370 <td>jet invariant mass</td>
371 <td></td>
372</tr>
373<tr bgcolor="#eeeeee">
374 <td>BTag</td>
375 <td>0 or 1 for a jet that has been tagged as containing a heavy quark</td>
376 <td></td>
377</tr>
378<tr bgcolor="#ffffff">
379 <td>TauTag</td>
380 <td>0 or 1 for a jet that has been tagged as a tau</td>
381 <td></td>
382</tr>
383<tr bgcolor="#eeeeee">
384 <td>Charge</td>
385 <td>tau charge</td>
386 <td></td>
387</tr>
388<tr bgcolor="#ffffff">
389 <td>EhadOverEem</td>
390 <td>ratio of the hadronic versus electromagnetic energy deposited in the calorimeter</td>
391 <td></td>
392</tr>
393<tr bgcolor="#eeeeee">
394 <td>Constituents</td>
395 <td>references to constituents</td>
396 <td></td>
397</tr>
398<tr bgcolor="#ffffff">
399 <td>Particles</td>
400 <td>references to generated particles</td>
401 <td></td>
402</tr>
403<tr bgcolor="#ffffff"><td colspan=3><hr><a name="Track"><H3>Track</H3><hr></td></tr>
404<tr bgcolor="#eeeeee">
405 <td>PID</td>
406 <td>HEP ID number</td>
407 <td></td>
408</tr>
409<tr bgcolor="#ffffff">
410 <td>Charge</td>
411 <td>track charge</td>
412 <td></td>
413</tr>
414<tr bgcolor="#eeeeee">
415 <td>PT</td>
416 <td>track transverse momentum</td>
417 <td></td>
418</tr>
419<tr bgcolor="#ffffff">
420 <td>Eta</td>
421 <td>track pseudorapidity</td>
422 <td></td>
423</tr>
424<tr bgcolor="#eeeeee">
425 <td>Phi</td>
426 <td>track azimuthal angle</td>
427 <td></td>
428</tr>
429<tr bgcolor="#ffffff">
430 <td>EtaOuter</td>
431 <td>track pseudorapidity at the tracker edge</td>
432 <td></td>
433</tr>
434<tr bgcolor="#eeeeee">
435 <td>PhiOuter</td>
436 <td>track azimuthal angle at the tracker edge</td>
437 <td></td>
438</tr>
439<tr bgcolor="#ffffff">
440 <td>X</td>
441 <td>track vertex position (x component)</td>
442 <td></td>
443</tr>
444<tr bgcolor="#eeeeee">
445 <td>Y</td>
446 <td>track vertex position (y component)</td>
447 <td></td>
448</tr>
449<tr bgcolor="#ffffff">
450 <td>Z</td>
451 <td>track vertex position (z component)</td>
452 <td></td>
453</tr>
454<tr bgcolor="#eeeeee">
455 <td>XOuter</td>
456 <td>track position (x component) at the tracker edge</td>
457 <td></td>
458</tr>
459<tr bgcolor="#ffffff">
460 <td>YOuter</td>
461 <td>track position (y component) at the tracker edge</td>
462 <td></td>
463</tr>
464<tr bgcolor="#eeeeee">
465 <td>ZOuter</td>
466 <td>track position (z component) at the tracker edge</td>
467 <td></td>
468</tr>
469<tr bgcolor="#ffffff">
470 <td>Particle</td>
471 <td>reference to generated particle</td>
472 <td></td>
473</tr>
474<tr bgcolor="#ffffff"><td colspan=3><hr><a name="Tower"><H3>Tower</H3><hr></td></tr>
475<tr bgcolor="#eeeeee">
476 <td>ET</td>
477 <td>calorimeter tower transverse energy</td>
478 <td></td>
479</tr>
480<tr bgcolor="#ffffff">
481 <td>Eta</td>
482 <td>calorimeter tower pseudorapidity</td>
483 <td></td>
484</tr>
485<tr bgcolor="#eeeeee">
486 <td>Phi</td>
487 <td>calorimeter tower azimuthal angle</td>
488 <td></td>
489</tr>
490<tr bgcolor="#ffffff">
491 <td>E</td>
492 <td>calorimeter tower energy</td>
493 <td></td>
494</tr>
495<tr bgcolor="#eeeeee">
496 <td>Eem</td>
497 <td>calorimeter tower electromagnetic energy</td>
498 <td></td>
499</tr>
500<tr bgcolor="#ffffff">
501 <td>Ehad</td>
502 <td>calorimeter tower hadronic energy</td>
503 <td></td>
504</tr>
505<tr bgcolor="#eeeeee">
506 <td>Edges[4]</td>
507 <td>calorimeter tower edges</td>
508 <td></td>
509</tr>
510<tr bgcolor="#ffffff">
511 <td>Particles</td>
512 <td>references to generated particles</td>
513 <td></td>
514</tr>
515</table>
516</body></html>
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