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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="Vertex"><H3>Vertex</H3><hr></td></tr>
242<tr bgcolor="#eeeeee">
243 <td>T</td>
244 <td>vertex position (t component)</td>
245 <td></td>
246</tr>
247<tr bgcolor="#ffffff">
248 <td>X</td>
249 <td>vertex position (x component)</td>
250 <td></td>
251</tr>
252<tr bgcolor="#eeeeee">
253 <td>Y</td>
254 <td>vertex position (y component)</td>
255 <td></td>
256</tr>
257<tr bgcolor="#ffffff">
258 <td>Z</td>
259 <td>vertex position (z component)</td>
260 <td></td>
261</tr>
262<tr bgcolor="#ffffff"><td colspan=3><hr><a name="MissingET"><H3>MissingET</H3><hr></td></tr>
263<tr bgcolor="#eeeeee">
264 <td>MET</td>
265 <td>mising transverse energy</td>
266 <td></td>
267</tr>
268<tr bgcolor="#ffffff">
269 <td>Eta</td>
270 <td>mising energy pseudorapidity</td>
271 <td></td>
272</tr>
273<tr bgcolor="#eeeeee">
274 <td>Phi</td>
275 <td>mising energy azimuthal angle</td>
276 <td></td>
277</tr>
278<tr bgcolor="#ffffff"><td colspan=3><hr><a name="ScalarHT"><H3>ScalarHT</H3><hr></td></tr>
279<tr bgcolor="#eeeeee">
280 <td>HT</td>
281 <td>scalar sum of transverse momenta</td>
282 <td></td>
283</tr>
284<tr bgcolor="#ffffff"><td colspan=3><hr><a name="Rho"><H3>Rho</H3><hr></td></tr>
285<tr bgcolor="#eeeeee">
286 <td>Rho</td>
287 <td>rho energy density</td>
288 <td></td>
289</tr>
290<tr bgcolor="#ffffff">
291 <td>Edges[2]</td>
292 <td>pseudorapidity range edges</td>
293 <td></td>
294</tr>
295<tr bgcolor="#ffffff"><td colspan=3><hr><a name="Weight"><H3>Weight</H3><hr></td></tr>
296<tr bgcolor="#eeeeee">
297 <td>Weight</td>
298 <td>weight for the event</td>
299 <td></td>
300</tr>
301<tr bgcolor="#ffffff"><td colspan=3><hr><a name="Photon"><H3>Photon</H3><hr></td></tr>
302<tr bgcolor="#eeeeee">
303 <td>PT</td>
304 <td>photon transverse momentum</td>
305 <td></td>
306</tr>
307<tr bgcolor="#ffffff">
308 <td>Eta</td>
309 <td>photon pseudorapidity</td>
310 <td></td>
311</tr>
312<tr bgcolor="#eeeeee">
313 <td>Phi</td>
314 <td>photon azimuthal angle</td>
315 <td></td>
316</tr>
317<tr bgcolor="#ffffff">
318 <td>E</td>
319 <td>photon energy</td>
320 <td></td>
321</tr>
322<tr bgcolor="#eeeeee">
323 <td>EhadOverEem</td>
324 <td>ratio of the hadronic versus electromagnetic energy deposited in the calorimeter</td>
325 <td></td>
326</tr>
327<tr bgcolor="#ffffff">
328 <td>Particles</td>
329 <td>references to generated particles</td>
330 <td></td>
331</tr>
332<tr bgcolor="#ffffff"><td colspan=3><hr><a name="Electron"><H3>Electron</H3><hr></td></tr>
333<tr bgcolor="#eeeeee">
334 <td>PT</td>
335 <td>electron transverse momentum</td>
336 <td></td>
337</tr>
338<tr bgcolor="#ffffff">
339 <td>Eta</td>
340 <td>electron pseudorapidity</td>
341 <td></td>
342</tr>
343<tr bgcolor="#eeeeee">
344 <td>Phi</td>
345 <td>electron azimuthal angle</td>
346 <td></td>
347</tr>
348<tr bgcolor="#ffffff">
349 <td>Charge</td>
350 <td>electron charge</td>
351 <td></td>
352</tr>
353<tr bgcolor="#eeeeee">
354 <td>EhadOverEem</td>
355 <td>ratio of the hadronic versus electromagnetic energy deposited in the calorimeter</td>
356 <td></td>
357</tr>
358<tr bgcolor="#ffffff">
359 <td>Particle</td>
360 <td>reference to generated particle</td>
361 <td></td>
362</tr>
363<tr bgcolor="#ffffff"><td colspan=3><hr><a name="Muon"><H3>Muon</H3><hr></td></tr>
364<tr bgcolor="#eeeeee">
365 <td>PT</td>
366 <td>muon transverse momentum</td>
367 <td></td>
368</tr>
369<tr bgcolor="#ffffff">
370 <td>Eta</td>
371 <td>muon pseudorapidity</td>
372 <td></td>
373</tr>
374<tr bgcolor="#eeeeee">
375 <td>Phi</td>
376 <td>muon azimuthal angle</td>
377 <td></td>
378</tr>
379<tr bgcolor="#ffffff">
380 <td>Charge</td>
381 <td>muon charge</td>
382 <td></td>
383</tr>
384<tr bgcolor="#eeeeee">
385 <td>Particle</td>
386 <td>reference to generated particle</td>
387 <td></td>
388</tr>
389<tr bgcolor="#ffffff"><td colspan=3><hr><a name="Jet"><H3>Jet</H3><hr></td></tr>
390<tr bgcolor="#eeeeee">
391 <td>PT</td>
392 <td>jet transverse momentum</td>
393 <td></td>
394</tr>
395<tr bgcolor="#ffffff">
396 <td>Eta</td>
397 <td>jet pseudorapidity</td>
398 <td></td>
399</tr>
400<tr bgcolor="#eeeeee">
401 <td>Phi</td>
402 <td>jet azimuthal angle</td>
403 <td></td>
404</tr>
405<tr bgcolor="#ffffff">
406 <td>Mass</td>
407 <td>jet invariant mass</td>
408 <td></td>
409</tr>
410<tr bgcolor="#eeeeee">
411 <td>BTag</td>
412 <td>0 or 1 for a jet that has been tagged as containing a heavy quark</td>
413 <td></td>
414</tr>
415<tr bgcolor="#ffffff">
416 <td>TauTag</td>
417 <td>0 or 1 for a jet that has been tagged as a tau</td>
418 <td></td>
419</tr>
420<tr bgcolor="#eeeeee">
421 <td>Charge</td>
422 <td>tau charge</td>
423 <td></td>
424</tr>
425<tr bgcolor="#ffffff">
426 <td>EhadOverEem</td>
427 <td>ratio of the hadronic versus electromagnetic energy deposited in the calorimeter</td>
428 <td></td>
429</tr>
430<tr bgcolor="#eeeeee">
431 <td>Constituents</td>
432 <td>references to constituents</td>
433 <td></td>
434</tr>
435<tr bgcolor="#ffffff">
436 <td>Particles</td>
437 <td>references to generated particles</td>
438 <td></td>
439</tr>
440<tr bgcolor="#ffffff"><td colspan=3><hr><a name="Track"><H3>Track</H3><hr></td></tr>
441<tr bgcolor="#eeeeee">
442 <td>PID</td>
443 <td>HEP ID number</td>
444 <td></td>
445</tr>
446<tr bgcolor="#ffffff">
447 <td>Charge</td>
448 <td>track charge</td>
449 <td></td>
450</tr>
451<tr bgcolor="#eeeeee">
452 <td>PT</td>
453 <td>track transverse momentum</td>
454 <td></td>
455</tr>
456<tr bgcolor="#ffffff">
457 <td>Eta</td>
458 <td>track pseudorapidity</td>
459 <td></td>
460</tr>
461<tr bgcolor="#eeeeee">
462 <td>Phi</td>
463 <td>track azimuthal angle</td>
464 <td></td>
465</tr>
466<tr bgcolor="#ffffff">
467 <td>EtaOuter</td>
468 <td>track pseudorapidity at the tracker edge</td>
469 <td></td>
470</tr>
471<tr bgcolor="#eeeeee">
472 <td>PhiOuter</td>
473 <td>track azimuthal angle at the tracker edge</td>
474 <td></td>
475</tr>
476<tr bgcolor="#ffffff">
477 <td>X</td>
478 <td>track vertex position (x component)</td>
479 <td></td>
480</tr>
481<tr bgcolor="#eeeeee">
482 <td>Y</td>
483 <td>track vertex position (y component)</td>
484 <td></td>
485</tr>
486<tr bgcolor="#ffffff">
487 <td>Z</td>
488 <td>track vertex position (z component)</td>
489 <td></td>
490</tr>
491<tr bgcolor="#eeeeee">
492 <td>XOuter</td>
493 <td>track position (x component) at the tracker edge</td>
494 <td></td>
495</tr>
496<tr bgcolor="#ffffff">
497 <td>YOuter</td>
498 <td>track position (y component) at the tracker edge</td>
499 <td></td>
500</tr>
501<tr bgcolor="#eeeeee">
502 <td>ZOuter</td>
503 <td>track position (z component) at the tracker edge</td>
504 <td></td>
505</tr>
506<tr bgcolor="#ffffff">
507 <td>Particle</td>
508 <td>reference to generated particle</td>
509 <td></td>
510</tr>
511<tr bgcolor="#ffffff"><td colspan=3><hr><a name="Tower"><H3>Tower</H3><hr></td></tr>
512<tr bgcolor="#eeeeee">
513 <td>ET</td>
514 <td>calorimeter tower transverse energy</td>
515 <td></td>
516</tr>
517<tr bgcolor="#ffffff">
518 <td>Eta</td>
519 <td>calorimeter tower pseudorapidity</td>
520 <td></td>
521</tr>
522<tr bgcolor="#eeeeee">
523 <td>Phi</td>
524 <td>calorimeter tower azimuthal angle</td>
525 <td></td>
526</tr>
527<tr bgcolor="#ffffff">
528 <td>E</td>
529 <td>calorimeter tower energy</td>
530 <td></td>
531</tr>
532<tr bgcolor="#eeeeee">
533 <td>Eem</td>
534 <td>calorimeter tower electromagnetic energy</td>
535 <td></td>
536</tr>
537<tr bgcolor="#ffffff">
538 <td>Ehad</td>
539 <td>calorimeter tower hadronic energy</td>
540 <td></td>
541</tr>
542<tr bgcolor="#eeeeee">
543 <td>Edges[4]</td>
544 <td>calorimeter tower edges</td>
545 <td></td>
546</tr>
547<tr bgcolor="#ffffff">
548 <td>Particles</td>
549 <td>references to generated particles</td>
550 <td></td>
551</tr>
552</table>
553</body></html>
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