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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>Branches</H2>
11<hr>
12<table style="border: 1px dotted;" align="center" border="0" cellpadding="7" cellspacing="3" widt="95%">
13<tr><td><b>Branch</b></td>
14<td><b>Definition</b></td>
15<td><b>Class</b></td></tr>
16<tr bgcolor="#eeeeee">
17 <td>Event</td>
18 <td>generated event from LHEF
19</td>
20 <td><a href="#ExRootLHEFEvent">ExRootLHEFEvent</a></td>
21</tr>
22<tr bgcolor="#ffffff">
23 <td>Particle</td>
24 <td>generated partons from LHEF
25</td>
26 <td><a href="#ExRootLHEFParticle">ExRootLHEFParticle</a></td>
27</tr>
28<tr bgcolor="#eeeeee">
29 <td>Event</td>
30 <td>information about generated event</td>
31 <td><a href="#ExRootGenEvent">ExRootGenEvent</a></td>
32</tr>
33<tr bgcolor="#ffffff">
34 <td>GenParticle</td>
35 <td>generated particles from HEPEVT</td>
36 <td><a href="#ExRootGenParticle">ExRootGenParticle</a></td>
37</tr>
38<tr bgcolor="#eeeeee">
39 <td>Event</td>
40 <td>information about reconstructed event
41</td>
42 <td><a href="#ExRootEvent">ExRootEvent</a></td>
43</tr>
44<tr bgcolor="#ffffff">
45 <td>Photon</td>
46 <td>reconstructed photons
47</td>
48 <td><a href="#ExRootPhoton">ExRootPhoton</a></td>
49</tr>
50<tr bgcolor="#eeeeee">
51 <td>Electron</td>
52 <td>reconstructed electrons
53</td>
54 <td><a href="#ExRootElectron">ExRootElectron</a></td>
55</tr>
56<tr bgcolor="#ffffff">
57 <td>Muon</td>
58 <td>reconstructed muons
59</td>
60 <td><a href="#ExRootMuon">ExRootMuon</a></td>
61</tr>
62<tr bgcolor="#eeeeee">
63 <td>Tau</td>
64 <td>reconstructed hadronically-decaying tau leptons
65</td>
66 <td><a href="#ExRootTau">ExRootTau</a></td>
67</tr>
68<tr bgcolor="#ffffff">
69 <td>Jet</td>
70 <td>reconstructed jets
71</td>
72 <td><a href="#ExRootJet">ExRootJet</a></td>
73</tr>
74<tr bgcolor="#eeeeee">
75 <td>MissingET</td>
76 <td>missing transverse energy
77</td>
78 <td><a href="#ExRootMissingET">ExRootMissingET</a></td>
79</tr>
80</table>
81<hr>
82<H2>Classes</H2>
83<hr>
84<table style="border: 1px dotted;" align="center" border="0" cellpadding="7" cellspacing="3" widt="95%">
85<tr><td><b>Parameter</b></td>
86<td><b>Definition</b></td>
87<td><b>How it was calculated</b></td></tr>
88<tr bgcolor="#ffffff"><td colspan=3><hr><a name="ExRootLHEFEvent"><H3>ExRootLHEFEvent</H3><hr></td></tr>
89<tr bgcolor="#ffffff">
90 <td>Number</td>
91 <td>event number
92</td>
93 <td></td>
94</tr>
95<tr bgcolor="#eeeeee">
96 <td>Nparticles</td>
97 <td>number of particles in the event </td>
98 <td> hepup.NUP
99</td>
100</tr>
101<tr bgcolor="#ffffff">
102 <td>ProcessID</td>
103 <td>subprocess code for the event </td>
104 <td> hepup.IDPRUP
105</td>
106</tr>
107<tr bgcolor="#eeeeee">
108 <td>Weight</td>
109 <td>weight for the event </td>
110 <td> hepup.XWGTUP
111</td>
112</tr>
113<tr bgcolor="#ffffff">
114 <td>ScalePDF</td>
115 <td>scale in GeV used in the calculation of the PDFs in the event </td>
116 <td> hepup.SCALUP
117</td>
118</tr>
119<tr bgcolor="#eeeeee">
120 <td>CouplingQED</td>
121 <td>value of the QED coupling used in the event </td>
122 <td> hepup.AQEDUP
123</td>
124</tr>
125<tr bgcolor="#ffffff">
126 <td>CouplingQCD</td>
127 <td>value of the QCD coupling used in the event </td>
128 <td> hepup.AQCDUP
129</td>
130</tr>
131<tr bgcolor="#ffffff"><td colspan=3><hr><a name="ExRootLHEFParticle"><H3>ExRootLHEFParticle</H3><hr></td></tr>
132<tr bgcolor="#ffffff">
133 <td>PID</td>
134 <td>particle HEP ID number </td>
135 <td> hepup.IDUP[number]
136</td>
137</tr>
138<tr bgcolor="#eeeeee">
139 <td>Status</td>
140 <td>particle status code </td>
141 <td> hepup.ISTUP[number]
142</td>
143</tr>
144<tr bgcolor="#ffffff">
145 <td>Mother1</td>
146 <td>index for the particle first mother </td>
147 <td> hepup.MOTHUP[number][0]
148</td>
149</tr>
150<tr bgcolor="#eeeeee">
151 <td>Mother2</td>
152 <td>index for the particle last mother </td>
153 <td> hepup.MOTHUP[number][1]
154</td>
155</tr>
156<tr bgcolor="#ffffff">
157 <td>ColorLine1</td>
158 <td>index for the particle color-line </td>
159 <td> hepup.ICOLUP[number][0]
160</td>
161</tr>
162<tr bgcolor="#eeeeee">
163 <td>ColorLine2</td>
164 <td>index for the particle anti-color-line </td>
165 <td> hepup.ICOLUP[number][1]
166</td>
167</tr>
168<tr bgcolor="#ffffff">
169 <td>Px</td>
170 <td>particle momentum vector (x component) </td>
171 <td> hepup.PUP[number][0]
172</td>
173</tr>
174<tr bgcolor="#eeeeee">
175 <td>Py</td>
176 <td>particle momentum vector (y component) </td>
177 <td> hepup.PUP[number][1]
178</td>
179</tr>
180<tr bgcolor="#ffffff">
181 <td>Pz</td>
182 <td>particle momentum vector (z component) </td>
183 <td> hepup.PUP[number][2]
184</td>
185</tr>
186<tr bgcolor="#eeeeee">
187 <td>E</td>
188 <td>particle energy </td>
189 <td> hepup.PUP[number][3]
190</td>
191</tr>
192<tr bgcolor="#ffffff">
193 <td>M</td>
194 <td>particle mass </td>
195 <td> hepup.PUP[number][4]
196</td>
197</tr>
198<tr bgcolor="#eeeeee">
199 <td>PT</td>
200 <td>particle transverse momentum
201</td>
202 <td></td>
203</tr>
204<tr bgcolor="#ffffff">
205 <td>Eta</td>
206 <td>particle pseudorapidity
207</td>
208 <td></td>
209</tr>
210<tr bgcolor="#eeeeee">
211 <td>Phi</td>
212 <td>particle azimuthal angle
213</td>
214 <td></td>
215</tr>
216<tr bgcolor="#ffffff">
217 <td>Rapidity</td>
218 <td>particle rapidity
219</td>
220 <td></td>
221</tr>
222<tr bgcolor="#eeeeee">
223 <td>LifeTime</td>
224 <td>particle invariant lifetime
225 (c*tau, distance from production to decay in mm)
226 </td>
227 <td> hepup.VTIMUP[number]
228</td>
229</tr>
230<tr bgcolor="#ffffff">
231 <td>Spin</td>
232 <td>cosine of the angle between the particle spin vector
233 and the decaying particle 3-momentum,
234 specified in the lab frame. </td>
235 <td> hepup.SPINUP[number]
236</td>
237</tr>
238<tr bgcolor="#ffffff"><td colspan=3><hr><a name="ExRootGenEvent"><H3>ExRootGenEvent</H3><hr></td></tr>
239<tr bgcolor="#ffffff">
240 <td>Number</td>
241 <td>event number </td>
242 <td> hepevt.nevhep
243</td>
244</tr>
245<tr bgcolor="#ffffff"><td colspan=3><hr><a name="ExRootGenParticle"><H3>ExRootGenParticle</H3><hr></td></tr>
246<tr bgcolor="#ffffff">
247 <td>PID</td>
248 <td>particle HEP ID number </td>
249 <td> hepevt.idhep[number]
250</td>
251</tr>
252<tr bgcolor="#eeeeee">
253 <td>Status</td>
254 <td>particle status </td>
255 <td> hepevt.isthep[number]
256</td>
257</tr>
258<tr bgcolor="#ffffff">
259 <td>M1</td>
260 <td>particle 1st mother </td>
261 <td> hepevt.jmohep[number][0] - 1
262</td>
263</tr>
264<tr bgcolor="#eeeeee">
265 <td>M2</td>
266 <td>particle 2nd mother </td>
267 <td> hepevt.jmohep[number][1] - 1
268</td>
269</tr>
270<tr bgcolor="#ffffff">
271 <td>D1</td>
272 <td>particle 1st daughter </td>
273 <td> hepevt.jdahep[number][0] - 1
274</td>
275</tr>
276<tr bgcolor="#eeeeee">
277 <td>D2</td>
278 <td>particle 2nd daughter </td>
279 <td> hepevt.jdahep[number][1] - 1
280</td>
281</tr>
282<tr bgcolor="#ffffff">
283 <td>E</td>
284 <td>particle energy </td>
285 <td> hepevt.phep[number][3]
286</td>
287</tr>
288<tr bgcolor="#eeeeee">
289 <td>Px</td>
290 <td>particle momentum vector (x component) </td>
291 <td> hepevt.phep[number][0]
292</td>
293</tr>
294<tr bgcolor="#ffffff">
295 <td>Py</td>
296 <td>particle momentum vector (y component) </td>
297 <td> hepevt.phep[number][1]
298</td>
299</tr>
300<tr bgcolor="#eeeeee">
301 <td>Pz</td>
302 <td>particle momentum vector (z component) </td>
303 <td> hepevt.phep[number][2]
304</td>
305</tr>
306<tr bgcolor="#ffffff">
307 <td>PT</td>
308 <td>particle transverse momentum
309</td>
310 <td></td>
311</tr>
312<tr bgcolor="#eeeeee">
313 <td>Eta</td>
314 <td>particle pseudorapidity
315</td>
316 <td></td>
317</tr>
318<tr bgcolor="#ffffff">
319 <td>Phi</td>
320 <td>particle azimuthal angle
321</td>
322 <td></td>
323</tr>
324<tr bgcolor="#eeeeee">
325 <td>Rapidity</td>
326 <td>particle rapidity
327</td>
328 <td></td>
329</tr>
330<tr bgcolor="#ffffff">
331 <td>T</td>
332 <td>particle vertex position (t component) </td>
333 <td> hepevt.vhep[number][3]
334</td>
335</tr>
336<tr bgcolor="#eeeeee">
337 <td>X</td>
338 <td>particle vertex position (x component) </td>
339 <td> hepevt.vhep[number][0]
340</td>
341</tr>
342<tr bgcolor="#ffffff">
343 <td>Y</td>
344 <td>particle vertex position (y component) </td>
345 <td> hepevt.vhep[number][1]
346</td>
347</tr>
348<tr bgcolor="#eeeeee">
349 <td>Z</td>
350 <td>particle vertex position (z component) </td>
351 <td> hepevt.vhep[number][2]
352</td>
353</tr>
354<tr bgcolor="#ffffff"><td colspan=3><hr><a name="ExRootGenJet"><H3>ExRootGenJet</H3><hr></td></tr>
355<tr bgcolor="#ffffff">
356 <td>E</td>
357 <td>jet energy
358</td>
359 <td></td>
360</tr>
361<tr bgcolor="#eeeeee">
362 <td>Px</td>
363 <td>jet momentum vector (x component)
364</td>
365 <td></td>
366</tr>
367<tr bgcolor="#ffffff">
368 <td>Py</td>
369 <td>jet momentum vector (y component)
370</td>
371 <td></td>
372</tr>
373<tr bgcolor="#eeeeee">
374 <td>Pz</td>
375 <td>jet momentum vector (z component)
376</td>
377 <td></td>
378</tr>
379<tr bgcolor="#ffffff">
380 <td>PT</td>
381 <td>jet transverse momentum
382</td>
383 <td></td>
384</tr>
385<tr bgcolor="#eeeeee">
386 <td>Eta</td>
387 <td>jet pseudorapidity
388</td>
389 <td></td>
390</tr>
391<tr bgcolor="#ffffff">
392 <td>Phi</td>
393 <td>jet azimuthal angle
394</td>
395 <td></td>
396</tr>
397<tr bgcolor="#eeeeee">
398 <td>Rapidity</td>
399 <td>jet rapidity
400</td>
401 <td></td>
402</tr>
403<tr bgcolor="#ffffff">
404 <td>Mass</td>
405 <td>jet invariant mass
406</td>
407 <td></td>
408</tr>
409<tr bgcolor="#ffffff"><td colspan=3><hr><a name="ExRootEvent"><H3>ExRootEvent</H3><hr></td></tr>
410<tr bgcolor="#ffffff">
411 <td>Number</td>
412 <td>event number
413</td>
414 <td></td>
415</tr>
416<tr bgcolor="#eeeeee">
417 <td>Trigger</td>
418 <td>trigger word
419</td>
420 <td></td>
421</tr>
422<tr bgcolor="#ffffff"><td colspan=3><hr><a name="ExRootMissingET"><H3>ExRootMissingET</H3><hr></td></tr>
423<tr bgcolor="#ffffff">
424 <td>MET</td>
425 <td>mising transverse energy
426</td>
427 <td></td>
428</tr>
429<tr bgcolor="#eeeeee">
430 <td>Phi</td>
431 <td>mising energy azimuthal angle
432</td>
433 <td></td>
434</tr>
435<tr bgcolor="#ffffff"><td colspan=3><hr><a name="ExRootPhoton"><H3>ExRootPhoton</H3><hr></td></tr>
436<tr bgcolor="#ffffff">
437 <td>PT</td>
438 <td>photon transverse momentum
439</td>
440 <td></td>
441</tr>
442<tr bgcolor="#eeeeee">
443 <td>Eta</td>
444 <td>photon pseudorapidity
445</td>
446 <td></td>
447</tr>
448<tr bgcolor="#ffffff">
449 <td>Phi</td>
450 <td>photon azimuthal angle
451</td>
452 <td></td>
453</tr>
454<tr bgcolor="#eeeeee">
455 <td>EhadOverEem</td>
456 <td>ratio of the hadronic versus electromagnetic energy
457 deposited in the calorimeter
458</td>
459 <td></td>
460</tr>
461<tr bgcolor="#ffffff"><td colspan=3><hr><a name="ExRootElectron"><H3>ExRootElectron</H3><hr></td></tr>
462<tr bgcolor="#ffffff">
463 <td>PT</td>
464 <td>electron transverse momentum
465</td>
466 <td></td>
467</tr>
468<tr bgcolor="#eeeeee">
469 <td>Eta</td>
470 <td>electron pseudorapidity
471</td>
472 <td></td>
473</tr>
474<tr bgcolor="#ffffff">
475 <td>Phi</td>
476 <td>electron azimuthal angle
477</td>
478 <td></td>
479</tr>
480<tr bgcolor="#eeeeee">
481 <td>Charge</td>
482 <td>electron charge
483</td>
484 <td></td>
485</tr>
486<tr bgcolor="#ffffff">
487 <td>Ntrk</td>
488 <td>number of tracks associated with the electron
489</td>
490 <td></td>
491</tr>
492<tr bgcolor="#eeeeee">
493 <td>EhadOverEem</td>
494 <td>ratio of the hadronic versus electromagnetic energy
495 deposited in the calorimeter
496</td>
497 <td></td>
498</tr>
499<tr bgcolor="#ffffff"><td colspan=3><hr><a name="ExRootMuon"><H3>ExRootMuon</H3><hr></td></tr>
500<tr bgcolor="#ffffff">
501 <td>PT</td>
502 <td>muon transverse momentum
503</td>
504 <td></td>
505</tr>
506<tr bgcolor="#eeeeee">
507 <td>Eta</td>
508 <td>muon pseudorapidity
509</td>
510 <td></td>
511</tr>
512<tr bgcolor="#ffffff">
513 <td>Phi</td>
514 <td>muon azimuthal angle
515</td>
516 <td></td>
517</tr>
518<tr bgcolor="#eeeeee">
519 <td>Charge</td>
520 <td>muon charge
521</td>
522 <td></td>
523</tr>
524<tr bgcolor="#ffffff">
525 <td>Ntrk</td>
526 <td>number of tracks associated with the muon
527</td>
528 <td></td>
529</tr>
530<tr bgcolor="#eeeeee">
531 <td>PTiso</td>
532 <td>sum of tracks transverse momentum within a cone of radius R=0.4
533 centered on the muon (excluding the muon itself)
534</td>
535 <td></td>
536</tr>
537<tr bgcolor="#ffffff">
538 <td>ETiso</td>
539 <td>ratio of ET in a 3x3 calorimeter cells array around the muon
540 (including the muon's cell) to the muon PT
541</td>
542 <td></td>
543</tr>
544<tr bgcolor="#eeeeee">
545 <td>JetIndex</td>
546 <td>index of the closest jet
547</td>
548 <td></td>
549</tr>
550<tr bgcolor="#ffffff"><td colspan=3><hr><a name="ExRootTau"><H3>ExRootTau</H3><hr></td></tr>
551<tr bgcolor="#ffffff">
552 <td>PT</td>
553 <td>tau transverse momentum
554</td>
555 <td></td>
556</tr>
557<tr bgcolor="#eeeeee">
558 <td>Eta</td>
559 <td>tau pseudorapidity
560</td>
561 <td></td>
562</tr>
563<tr bgcolor="#ffffff">
564 <td>Phi</td>
565 <td>tau azimuthal angle
566</td>
567 <td></td>
568</tr>
569<tr bgcolor="#eeeeee">
570 <td>Charge</td>
571 <td>tau charge
572</td>
573 <td></td>
574</tr>
575<tr bgcolor="#ffffff">
576 <td>Ntrk</td>
577 <td>number of charged tracks associated with the tau
578</td>
579 <td></td>
580</tr>
581<tr bgcolor="#eeeeee">
582 <td>EhadOverEem</td>
583 <td>ratio of the hadronic versus electromagnetic energy
584 deposited in the calorimeter
585</td>
586 <td></td>
587</tr>
588<tr bgcolor="#ffffff"><td colspan=3><hr><a name="ExRootJet"><H3>ExRootJet</H3><hr></td></tr>
589<tr bgcolor="#ffffff">
590 <td>PT</td>
591 <td>jet transverse momentum
592</td>
593 <td></td>
594</tr>
595<tr bgcolor="#eeeeee">
596 <td>Eta</td>
597 <td>jet pseudorapidity
598</td>
599 <td></td>
600</tr>
601<tr bgcolor="#ffffff">
602 <td>Phi</td>
603 <td>jet azimuthal angle
604</td>
605 <td></td>
606</tr>
607<tr bgcolor="#eeeeee">
608 <td>Mass</td>
609 <td>jet invariant mass
610</td>
611 <td></td>
612</tr>
613<tr bgcolor="#ffffff">
614 <td>Ntrk</td>
615 <td>number of tracks associated with the jet
616</td>
617 <td></td>
618</tr>
619<tr bgcolor="#eeeeee">
620 <td>BTag</td>
621 <td>1 or 2 for a jet that has been tagged as containing a heavy quark
622</td>
623 <td></td>
624</tr>
625<tr bgcolor="#ffffff">
626 <td>EhadOverEem</td>
627 <td>ratio of the hadronic versus electromagnetic energy
628 deposited in the calorimeter
629</td>
630 <td></td>
631</tr>
632<tr bgcolor="#eeeeee">
633 <td>Index</td>
634 <td>jet index in the LHC Olympics file
635</td>
636 <td></td>
637</tr>
638</table>
639</body></html>
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