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1<!doctype html>
2<html>
3<head>
4 <meta HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
5 <meta NAME="keywords" CONTENT="root, tree, ntuple, format, description">
6 <title>root tree description</title>
7 <style>
8 body { font-family: sans-serif; max-width: 800px; line-height: 1.4; margin-left: auto; margin-right: auto; padding: 0em 1em 3em 1em; }
9 h1 { font-weight: normal; }
10 td, th { border: 1px solid #d3d3d3; padding: 0.1em 0.3em; }
11 th { text-align: left; background-color: #f5f5f5; }
12 tr.even td { background-color: #f5f5f5; }
13 tr.class td { font-weight: bold; padding-top: 1em; }
14 </style>
15</head>
16<body>
17<h1>ROOT Tree Description</h1>
18<p>Description of all classes used to store output data.</p>
19<table>
20<tr><th>Parameter</th>
21<th>Definition</th>
22<th>How it was calculated</th></tr>
23<tr class="class"><td colspan="3" id="Event">class Event</td></tr>
24<tr class="even">
25 <td>Number</td>
26 <td>event number</td>
27 <td></td>
28</tr>
29<tr class="class"><td colspan="3" id="LHCOEvent">class LHCOEvent</td></tr>
30<tr class="odd">
31 <td><a href="#Event">Event</a></td>
32 <td>LHCOEvent inherits all Event parameters</td>
33 <td></td>
34</tr>
35<tr class="even">
36 <td>Trigger</td>
37 <td>trigger word</td>
38 <td></td>
39</tr>
40<tr class="class"><td colspan="3" id="LHEFEvent">class LHEFEvent</td></tr>
41<tr class="odd">
42 <td><a href="#Event">Event</a></td>
43 <td>LHEFEvent inherits all Event parameters</td>
44 <td></td>
45</tr>
46<tr class="even">
47 <td>ProcessID</td>
48 <td>subprocess code for the event </td>
49 <td> hepup.IDPRUP</td>
50</tr>
51<tr class="odd">
52 <td>Weight</td>
53 <td>weight for the event </td>
54 <td> hepup.XWGTUP</td>
55</tr>
56<tr class="even">
57 <td>ScalePDF</td>
58 <td>scale in GeV used in the calculation of the PDFs in the event </td>
59 <td> hepup.SCALUP</td>
60</tr>
61<tr class="odd">
62 <td>AlphaQED</td>
63 <td>value of the QED coupling used in the event </td>
64 <td> hepup.AQEDUP</td>
65</tr>
66<tr class="even">
67 <td>AlphaQCD</td>
68 <td>value of the QCD coupling used in the event </td>
69 <td> hepup.AQCDUP</td>
70</tr>
71<tr class="class"><td colspan="3" id="HepMCEvent">class HepMCEvent</td></tr>
72<tr class="odd">
73 <td><a href="#Event">Event</a></td>
74 <td>HepMCEvent inherits all Event parameters</td>
75 <td></td>
76</tr>
77<tr class="even">
78 <td>ProcessID</td>
79 <td>unique signal process id </td>
80 <td> signal_process_id()</td>
81</tr>
82<tr class="odd">
83 <td>MPI</td>
84 <td>number of multi parton interactions </td>
85 <td> mpi ()</td>
86</tr>
87<tr class="even">
88 <td>Weight</td>
89 <td>weight for the event</td>
90 <td></td>
91</tr>
92<tr class="odd">
93 <td>Scale</td>
94 <td>energy scale, see hep-ph/0109068 </td>
95 <td> event_scale()</td>
96</tr>
97<tr class="even">
98 <td>AlphaQED</td>
99 <td>QED coupling, see hep-ph/0109068 </td>
100 <td> alphaQED()</td>
101</tr>
102<tr class="odd">
103 <td>AlphaQCD</td>
104 <td>QCD coupling, see hep-ph/0109068 </td>
105 <td> alphaQCD()</td>
106</tr>
107<tr class="even">
108 <td>ID1</td>
109 <td>flavour code of first parton </td>
110 <td> pdf_info()->id1()</td>
111</tr>
112<tr class="odd">
113 <td>ID2</td>
114 <td>flavour code of second parton </td>
115 <td> pdf_info()->id2()</td>
116</tr>
117<tr class="even">
118 <td>X1</td>
119 <td>fraction of beam momentum carried by first parton ("beam side") </td>
120 <td> pdf_info()->x1()</td>
121</tr>
122<tr class="odd">
123 <td>X2</td>
124 <td>fraction of beam momentum carried by second parton ("target side") </td>
125 <td> pdf_info()->x2()</td>
126</tr>
127<tr class="even">
128 <td>ScalePDF</td>
129 <td>Q-scale used in evaluation of PDF's (in GeV) </td>
130 <td> pdf_info()->scalePDF()</td>
131</tr>
132<tr class="odd">
133 <td>PDF1</td>
134 <td>PDF (id1, x1, Q) </td>
135 <td> pdf_info()->pdf1()</td>
136</tr>
137<tr class="even">
138 <td>PDF2</td>
139 <td>PDF (id2, x2, Q) </td>
140 <td> pdf_info()->pdf2()</td>
141</tr>
142<tr class="class"><td colspan="3" id="GenParticle">class GenParticle</td></tr>
143<tr class="even">
144 <td>PID</td>
145 <td>particle HEP ID number </td>
146 <td> hepevt.idhep[number]</td>
147</tr>
148<tr class="odd">
149 <td>Status</td>
150 <td>particle status </td>
151 <td> hepevt.isthep[number]</td>
152</tr>
153<tr class="even">
154 <td>IsPU</td>
155 <td>0 or 1 for particles from pile-up interactions</td>
156 <td></td>
157</tr>
158<tr class="odd">
159 <td>M1</td>
160 <td>particle 1st mother </td>
161 <td> hepevt.jmohep[number][0] - 1</td>
162</tr>
163<tr class="even">
164 <td>M2</td>
165 <td>particle 2nd mother </td>
166 <td> hepevt.jmohep[number][1] - 1</td>
167</tr>
168<tr class="odd">
169 <td>D1</td>
170 <td>particle 1st daughter </td>
171 <td> hepevt.jdahep[number][0] - 1</td>
172</tr>
173<tr class="even">
174 <td>D2</td>
175 <td>particle last daughter </td>
176 <td> hepevt.jdahep[number][1] - 1</td>
177</tr>
178<tr class="odd">
179 <td>Charge</td>
180 <td>particle charge</td>
181 <td></td>
182</tr>
183<tr class="even">
184 <td>Mass</td>
185 <td>particle mass</td>
186 <td></td>
187</tr>
188<tr class="odd">
189 <td>E</td>
190 <td>particle energy </td>
191 <td> hepevt.phep[number][3]</td>
192</tr>
193<tr class="even">
194 <td>Px</td>
195 <td>particle momentum vector (x component) </td>
196 <td> hepevt.phep[number][0]</td>
197</tr>
198<tr class="odd">
199 <td>Py</td>
200 <td>particle momentum vector (y component) </td>
201 <td> hepevt.phep[number][1]</td>
202</tr>
203<tr class="even">
204 <td>Pz</td>
205 <td>particle momentum vector (z component) </td>
206 <td> hepevt.phep[number][2]</td>
207</tr>
208<tr class="odd">
209 <td>PT</td>
210 <td>particle transverse momentum</td>
211 <td></td>
212</tr>
213<tr class="even">
214 <td>Eta</td>
215 <td>particle pseudorapidity</td>
216 <td></td>
217</tr>
218<tr class="odd">
219 <td>Phi</td>
220 <td>particle azimuthal angle</td>
221 <td></td>
222</tr>
223<tr class="even">
224 <td>Rapidity</td>
225 <td>particle rapidity</td>
226 <td></td>
227</tr>
228<tr class="odd">
229 <td>T</td>
230 <td>particle vertex position (t component) </td>
231 <td> hepevt.vhep[number][3]</td>
232</tr>
233<tr class="even">
234 <td>X</td>
235 <td>particle vertex position (x component) </td>
236 <td> hepevt.vhep[number][0]</td>
237</tr>
238<tr class="odd">
239 <td>Y</td>
240 <td>particle vertex position (y component) </td>
241 <td> hepevt.vhep[number][1]</td>
242</tr>
243<tr class="even">
244 <td>Z</td>
245 <td>particle vertex position (z component) </td>
246 <td> hepevt.vhep[number][2]</td>
247</tr>
248<tr class="class"><td colspan="3" id="Vertex">class Vertex</td></tr>
249<tr class="even">
250 <td>T</td>
251 <td>vertex position (t component)</td>
252 <td></td>
253</tr>
254<tr class="odd">
255 <td>X</td>
256 <td>vertex position (x component)</td>
257 <td></td>
258</tr>
259<tr class="even">
260 <td>Y</td>
261 <td>vertex position (y component)</td>
262 <td></td>
263</tr>
264<tr class="odd">
265 <td>Z</td>
266 <td>vertex position (z component)</td>
267 <td></td>
268</tr>
269<tr class="class"><td colspan="3" id="MissingET">class MissingET</td></tr>
270<tr class="even">
271 <td>MET</td>
272 <td>mising transverse energy</td>
273 <td></td>
274</tr>
275<tr class="odd">
276 <td>Eta</td>
277 <td>mising energy pseudorapidity</td>
278 <td></td>
279</tr>
280<tr class="even">
281 <td>Phi</td>
282 <td>mising energy azimuthal angle</td>
283 <td></td>
284</tr>
285<tr class="class"><td colspan="3" id="ScalarHT">class ScalarHT</td></tr>
286<tr class="even">
287 <td>HT</td>
288 <td>scalar sum of transverse momenta</td>
289 <td></td>
290</tr>
291<tr class="class"><td colspan="3" id="Rho">class Rho</td></tr>
292<tr class="even">
293 <td>Rho</td>
294 <td>rho energy density</td>
295 <td></td>
296</tr>
297<tr class="odd">
298 <td>Edges[2]</td>
299 <td>pseudorapidity range edges</td>
300 <td></td>
301</tr>
302<tr class="class"><td colspan="3" id="Weight">class Weight</td></tr>
303<tr class="even">
304 <td>Weight</td>
305 <td>weight for the event</td>
306 <td></td>
307</tr>
308<tr class="class"><td colspan="3" id="Photon">class Photon</td></tr>
309<tr class="even">
310 <td>PT</td>
311 <td>photon transverse momentum</td>
312 <td></td>
313</tr>
314<tr class="odd">
315 <td>Eta</td>
316 <td>photon pseudorapidity</td>
317 <td></td>
318</tr>
319<tr class="even">
320 <td>Phi</td>
321 <td>photon azimuthal angle</td>
322 <td></td>
323</tr>
324<tr class="odd">
325 <td>E</td>
326 <td>photon energy</td>
327 <td></td>
328</tr>
329<tr class="even">
330 <td>EhadOverEem</td>
331 <td>ratio of the hadronic versus electromagnetic energy deposited in the calorimeter</td>
332 <td></td>
333</tr>
334<tr class="odd">
335 <td>Particles</td>
336 <td>references to generated particles</td>
337 <td></td>
338</tr>
339<tr class="class"><td colspan="3" id="Electron">class Electron</td></tr>
340<tr class="even">
341 <td>PT</td>
342 <td>electron transverse momentum</td>
343 <td></td>
344</tr>
345<tr class="odd">
346 <td>Eta</td>
347 <td>electron pseudorapidity</td>
348 <td></td>
349</tr>
350<tr class="even">
351 <td>Phi</td>
352 <td>electron azimuthal angle</td>
353 <td></td>
354</tr>
355<tr class="odd">
356 <td>Charge</td>
357 <td>electron charge</td>
358 <td></td>
359</tr>
360<tr class="even">
361 <td>EhadOverEem</td>
362 <td>ratio of the hadronic versus electromagnetic energy deposited in the calorimeter</td>
363 <td></td>
364</tr>
365<tr class="odd">
366 <td>Particle</td>
367 <td>reference to generated particle</td>
368 <td></td>
369</tr>
370<tr class="class"><td colspan="3" id="Muon">class Muon</td></tr>
371<tr class="even">
372 <td>PT</td>
373 <td>muon transverse momentum</td>
374 <td></td>
375</tr>
376<tr class="odd">
377 <td>Eta</td>
378 <td>muon pseudorapidity</td>
379 <td></td>
380</tr>
381<tr class="even">
382 <td>Phi</td>
383 <td>muon azimuthal angle</td>
384 <td></td>
385</tr>
386<tr class="odd">
387 <td>Charge</td>
388 <td>muon charge</td>
389 <td></td>
390</tr>
391<tr class="even">
392 <td>Particle</td>
393 <td>reference to generated particle</td>
394 <td></td>
395</tr>
396<tr class="class"><td colspan="3" id="Jet">class Jet</td></tr>
397<tr class="even">
398 <td>PT</td>
399 <td>jet transverse momentum</td>
400 <td></td>
401</tr>
402<tr class="odd">
403 <td>Eta</td>
404 <td>jet pseudorapidity</td>
405 <td></td>
406</tr>
407<tr class="even">
408 <td>Phi</td>
409 <td>jet azimuthal angle</td>
410 <td></td>
411</tr>
412<tr class="odd">
413 <td>Mass</td>
414 <td>jet invariant mass</td>
415 <td></td>
416</tr>
417<tr class="even">
418 <td>BTag</td>
419 <td>0 or 1 for a jet that has been tagged as containing a heavy quark</td>
420 <td></td>
421</tr>
422<tr class="odd">
423 <td>TauTag</td>
424 <td>0 or 1 for a jet that has been tagged as a tau</td>
425 <td></td>
426</tr>
427<tr class="even">
428 <td>Charge</td>
429 <td>tau charge</td>
430 <td></td>
431</tr>
432<tr class="odd">
433 <td>EhadOverEem</td>
434 <td>ratio of the hadronic versus electromagnetic energy deposited in the calorimeter</td>
435 <td></td>
436</tr>
437<tr class="even">
438 <td>NCharged</td>
439 <td>number of charged constituents </td>
440 <td></td>
441</tr>
442<tr class="odd">
443 <td>NNeutrals</td>
444 <td>number of neutral constituents </td>
445 <td></td>
446</tr>
447<tr class="even">
448 <td>Beta</td>
449 <td>(sum pt of charged pile-up constituents)/(sum pt of charged constituents) </td>
450 <td></td>
451</tr>
452<tr class="odd">
453 <td>BetaStar</td>
454 <td>(sum pt of charged constituents coming from hard interaction)/(sum pt of charged constituents) </td>
455 <td></td>
456</tr>
457<tr class="even">
458 <td>MeanSqDeltaR</td>
459 <td>average distance (squared) between constituent and jet weighted by pt (squared) of constituent</td>
460 <td></td>
461</tr>
462<tr class="odd">
463 <td>PTD</td>
464 <td>average pt between constituent and jet weighted by pt of constituent</td>
465 <td></td>
466</tr>
467<tr class="even">
468 <td>FracPt[5]</td>
469 <td>(sum pt of constituents within a ring 0.1*i < DeltaR < 0.1*(i+1))/(sum pt of constituents) </td>
470 <td></td>
471</tr>
472<tr class="odd">
473 <td>Tau1</td>
474 <td>1-subjettiness</td>
475 <td></td>
476</tr>
477<tr class="even">
478 <td>Tau2</td>
479 <td>2-subjettiness</td>
480 <td></td>
481</tr>
482<tr class="odd">
483 <td>Tau3</td>
484 <td>3-subjettiness</td>
485 <td></td>
486</tr>
487<tr class="even">
488 <td>Tau4</td>
489 <td>4-subjettiness</td>
490 <td></td>
491</tr>
492<tr class="odd">
493 <td>Tau5</td>
494 <td>5-subjettiness</td>
495 <td></td>
496</tr>
497<tr class="even">
498 <td>Constituents</td>
499 <td>references to constituents</td>
500 <td></td>
501</tr>
502<tr class="odd">
503 <td>Particles</td>
504 <td>references to generated particles</td>
505 <td></td>
506</tr>
507<tr class="class"><td colspan="3" id="Track">class Track</td></tr>
508<tr class="even">
509 <td>PID</td>
510 <td>HEP ID number</td>
511 <td></td>
512</tr>
513<tr class="odd">
514 <td>Charge</td>
515 <td>track charge</td>
516 <td></td>
517</tr>
518<tr class="even">
519 <td>PT</td>
520 <td>track transverse momentum</td>
521 <td></td>
522</tr>
523<tr class="odd">
524 <td>Eta</td>
525 <td>track pseudorapidity</td>
526 <td></td>
527</tr>
528<tr class="even">
529 <td>Phi</td>
530 <td>track azimuthal angle</td>
531 <td></td>
532</tr>
533<tr class="odd">
534 <td>EtaOuter</td>
535 <td>track pseudorapidity at the tracker edge</td>
536 <td></td>
537</tr>
538<tr class="even">
539 <td>PhiOuter</td>
540 <td>track azimuthal angle at the tracker edge</td>
541 <td></td>
542</tr>
543<tr class="odd">
544 <td>X</td>
545 <td>track vertex position (x component)</td>
546 <td></td>
547</tr>
548<tr class="even">
549 <td>Y</td>
550 <td>track vertex position (y component)</td>
551 <td></td>
552</tr>
553<tr class="odd">
554 <td>Z</td>
555 <td>track vertex position (z component)</td>
556 <td></td>
557</tr>
558<tr class="even">
559 <td>T</td>
560 <td>track vertex position (z component)</td>
561 <td></td>
562</tr>
563<tr class="odd">
564 <td>XOuter</td>
565 <td>track position (x component) at the tracker edge</td>
566 <td></td>
567</tr>
568<tr class="even">
569 <td>YOuter</td>
570 <td>track position (y component) at the tracker edge</td>
571 <td></td>
572</tr>
573<tr class="odd">
574 <td>ZOuter</td>
575 <td>track position (z component) at the tracker edge</td>
576 <td></td>
577</tr>
578<tr class="even">
579 <td>TOuter</td>
580 <td>track position (z component) at the tracker edge</td>
581 <td></td>
582</tr>
583<tr class="odd">
584 <td>Particle</td>
585 <td>reference to generated particle</td>
586 <td></td>
587</tr>
588<tr class="class"><td colspan="3" id="Tower">class Tower</td></tr>
589<tr class="even">
590 <td>ET</td>
591 <td>calorimeter tower transverse energy</td>
592 <td></td>
593</tr>
594<tr class="odd">
595 <td>Eta</td>
596 <td>calorimeter tower pseudorapidity</td>
597 <td></td>
598</tr>
599<tr class="even">
600 <td>Phi</td>
601 <td>calorimeter tower azimuthal angle</td>
602 <td></td>
603</tr>
604<tr class="odd">
605 <td>E</td>
606 <td>calorimeter tower energy</td>
607 <td></td>
608</tr>
609<tr class="even">
610 <td>Eem</td>
611 <td>calorimeter tower electromagnetic energy</td>
612 <td></td>
613</tr>
614<tr class="odd">
615 <td>Ehad</td>
616 <td>calorimeter tower hadronic energy</td>
617 <td></td>
618</tr>
619<tr class="even">
620 <td>Edges[4]</td>
621 <td>calorimeter tower edges</td>
622 <td></td>
623</tr>
624<tr class="odd">
625 <td>Particles</td>
626 <td>references to generated particles</td>
627 <td></td>
628</tr>
629<tr class="class"><td colspan="3" id="HectorHit">class HectorHit</td></tr>
630<tr class="even">
631 <td>E</td>
632 <td>reconstructed energy [GeV]</td>
633 <td></td>
634</tr>
635<tr class="odd">
636 <td>Tx</td>
637 <td>angle of the momentum in the horizontal (x,z) plane [urad]</td>
638 <td></td>
639</tr>
640<tr class="even">
641 <td>Ty</td>
642 <td>angle of the momentum in the verical (y,z) plane [urad]</td>
643 <td></td>
644</tr>
645<tr class="odd">
646 <td>T</td>
647 <td>time of flight to the detector [s]</td>
648 <td></td>
649</tr>
650<tr class="even">
651 <td>X</td>
652 <td>horizontal distance to the beam [um]</td>
653 <td></td>
654</tr>
655<tr class="odd">
656 <td>Y</td>
657 <td>vertical distance to the beam [um]</td>
658 <td></td>
659</tr>
660<tr class="even">
661 <td>S</td>
662 <td>distance to the interaction point [m]</td>
663 <td></td>
664</tr>
665<tr class="odd">
666 <td>Particle</td>
667 <td>reference to generated particle</td>
668 <td></td>
669</tr>
670</table>
671</body></html>
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