Rivet Analyses Reference

ATLAS_2019_I1724098

Jet substructure at 13 TeV
Experiment: ATLAS (LHC)
Inspire ID: 1724098
Status: VALIDATED
Authors:
  • Deepak Kar
  • Amal Vaidya
  • Christian Gutschow
References:Beams: p+ p+
Beam energies: (6500.0, 6500.0) GeV
Run details:
  • Multijet / ttbar production at 13 TeV

A measurement of jet substructure observables is presented using data collected in 2016 by the ATLAS experiment at the LHC with proton-proton collisions at $\sqrt{s} = 13$ TeV. Large-radius jets groomed with the trimming and soft-drop algorithms are studied. Dedicated event selections are used to study jets produced by light quarks or gluons, and hadronically decaying top quarks and W bosons. The observables measured are sensitive to substructure, and therefore are typically used for tagging large-radius jets from boosted massive particles. These include the energy correlation functions and the $N$-subjettiness variables. The number of subjets and the Les Houches angularity are also considered. The distributions of the substructure variables, corrected for detector effects, are compared to the predictions of various Monte Carlo event generators. They are also compared between the large-radius jets originating from light quarks or gluons, and hadronically decaying top quarks and $W$ bosons.

Source code: ATLAS_2019_I1724098.cc
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
// -*- C++ -*-

#include "Rivet/Analysis.hh"
#include "Rivet/Projections/FastJets.hh"
#include "Rivet/Projections/PromptFinalState.hh"
#include "Rivet/Projections/ChargedLeptons.hh"
#include "Rivet/Projections/DressedLeptons.hh"
#include "Rivet/Projections/MissingMomentum.hh"

#include "fastjet/tools/Filter.hh"
#include "fastjet/contrib/SoftDrop.hh"
#include "fastjet/contrib/Nsubjettiness.hh"
#include "fastjet/contrib/Njettiness.hh"
#include "fastjet/contrib/EnergyCorrelator.hh"


namespace Rivet {


  /// @brief Jet substructure at 13 TeV
  class ATLAS_2019_I1724098: public Analysis {
  public:

    RIVET_DEFAULT_ANALYSIS_CTOR(ATLAS_2019_I1724098);

  private:

    /// @name Analysis methods
    //@{

    void init() {

      _mode = 0; // default is do eveything
      if ( getOption("MODE") == "DJ" )       _mode = 1;
      else if ( getOption("MODE") == "TW" )  _mode = 2;

      //Projections
      const FinalState fs(Cuts::abseta < 4.5);

      // Get photons used to dress leptons
      const FinalState photons(Cuts::abspid == PID::PHOTON);

      // Use all bare muons as input to the DressedMuons projection
      PromptFinalState bare_mu(Cuts::abspid == PID::MUON, true);
      PromptFinalState bare_el(Cuts::abspid == PID::ELECTRON, true);

      // Muons must have |eta| < 2.5
      Cut eta_ranges = Cuts::abseta < 2.5;
      DressedLeptons dressed_mu(photons, bare_mu, 0.1, eta_ranges && Cuts::pT > 30*GeV, true);
      declare(dressed_mu, "muons");
      DressedLeptons dressed_el(photons, bare_el, 0.1, eta_ranges && Cuts::pT > 25*GeV, true);
      declare(dressed_el, "electrons");

      FastJets fj(fs, FastJets::ANTIKT, 1.0, JetAlg::Muons::NONE, JetAlg::Invisibles::NONE);
      declare(fj, "FJets");
      FastJets sj(fs, FastJets::ANTIKT, 0.4, JetAlg::Muons::NONE, JetAlg::Invisibles::NONE);
      declare(sj, "Jets");

      ChargedLeptons lfs(FinalState(Cuts::abseta < 2.5 && Cuts::pT > 25*GeV));
      declare(lfs, "LFS");

      MissingMomentum missmom(fs);
      declare(missmom, "MissingMomentum");

      _trimmer = fastjet::Filter(fastjet::JetDefinition(fastjet::kt_algorithm, 0.2), fastjet::SelectorPtFractionMin(0.05));

      // Dijet
      if (_mode == 0 || _mode == 1) {
        // SD
        book(_h["dj_sdnsj"],1,1,1);
        book(_h["dj_sdlha"]  ,2,1,1);
        book(_h["dj_sdc2"]   ,3,1,1);
        book(_h["dj_sdd2"]   ,4,1,1);
        book(_h["dj_sdecf2"] ,5,1,1);
        book(_h["dj_sdecf3"] ,6,1,1);
        // TRIMMED
        book(_h["dj_nsj"]  ,23,1,1);
        book(_h["dj_lha"]  ,24,1,1);
        book(_h["dj_c2"]   ,25,1,1);
        book(_h["dj_d2"]   ,26,1,1);
        book(_h["dj_ecf2"] ,27,1,1);
        book(_h["dj_ecf3"] ,28,1,1);
      }

      if (_mode == 0 || _mode == 2) {
        //Top SD
        book(_h["tw_sdnsj"]   ,7,1,1);
        book(_h["tw_sdlha"]   ,8,1,1);
        book(_h["tw_sdc2"]    ,9,1,1);
        book(_h["tw_sdd2"]    ,10,1,1);
        book(_h["tw_sdecf2"]  ,11,1,1);
        book(_h["tw_sdecf3"]  ,12,1,1);
        book(_h["tw_sdtau21"] ,13,1,1);
        book(_h["tw_sdtau32"] ,14,1,1);
         //W SD
        book(_h["tw_wsdnsj"]   ,15,1,1);
        book(_h["tw_wsdlha"]   ,16,1,1);
        book(_h["tw_wsdc2"]    ,17,1,1);
        book(_h["tw_wsdd2"]    ,18,1,1);
        book(_h["tw_wsdecf2"]  ,19,1,1);
        book(_h["tw_wsdecf3"]  ,20,1,1);
        book(_h["tw_wsdtau21"] ,21,1,1);
        book(_h["tw_wsdtau32"] ,22,1,1);
        //Top TRIMMED
        book(_h["tw_nsj"]   ,29,1,1);
        book(_h["tw_lha"]   ,30,1,1);
        book(_h["tw_c2"]    ,31,1,1);
        book(_h["tw_d2"]    ,32,1,1);
        book(_h["tw_ecf2"]  ,33,1,1);
        book(_h["tw_ecf3"]  ,34,1,1);
        book(_h["tw_tau21"] ,35,1,1);
        book(_h["tw_tau32"] ,36,1,1);
        //W TRIMMED
        book(_h["tw_wnsj"]   ,37,1,1);
        book(_h["tw_wlha"]   ,38,1,1);
        book(_h["tw_wc2"]    ,39,1,1);
        book(_h["tw_wd2"]    ,40,1,1);
        book(_h["tw_wecf2"]  ,41,1,1);
        book(_h["tw_wecf3"]  ,42,1,1);
        book(_h["tw_wtau21"] ,43,1,1);
        book(_h["tw_wtau32"] ,44,1,1);
      }

    }

    /// Do the analysis
    void analyze(const Event& event) {

      if (_mode == 0 || _mode == 1)  doDIJET(event);
      if (_mode == 0 || _mode == 2)  doTW(event);

    }


    void doDIJET(const Event& event) {

      double  nsub, lha, ecf2, ecf3, c2, d2;
      double  sdnsub, sdlha, sdecf2, sdecf3, sdc2, sdd2;

      lha = sdlha = 0.0;

      const double beta = 1;

      const Particles & leptons = apply<ChargedLeptons>(event, "LFS").particles();
      if (leptons.size())  return;

      // Normal fatjets
      const Jets &fjets = apply<JetAlg>(event, "FJets").jetsByPt();

      // Trim the fatjets
      PseudoJets tr_ljets;
      for (size_t i = 0; i < fjets.size(); ++i) {
        tr_ljets += _trimmer(fjets[i]);
        tr_ljets[tr_ljets.size()-1].set_user_index(i);
      }

      size_t nBaseline = count(tr_ljets, [](const Jet &j) { return j.pT() > 200*GeV && j.abseta() < 2.5; });
      if (nBaseline < 2)  return;

      ifilter_select(tr_ljets, [](const PseudoJet &j) { return j.perp() > 450*GeV; });
      if (tr_ljets.size() > 1)  tr_ljets = sorted_by_pt(tr_ljets);
      else if (tr_ljets.empty())  return;

      if (abs(tr_ljets[0].eta()) > 1.5)  return;
      const fastjet::PseudoJet &LJet = tr_ljets[0];
      size_t uindex = tr_ljets[0].user_index();

      // Nsubjets
      JetDefinition subjet_def(fastjet::kt_algorithm, 0.2);
      ClusterSequence subjet_cs(LJet.constituents(), subjet_def);
      PseudoJets subjets = sorted_by_pt(subjet_cs.inclusive_jets(10.0));
      nsub = subjets.size();

      // LHA
      for (const PseudoJet& p : LJet.constituents()) {
        double trpt = p.pt();
        double trtheta = p.squared_distance(LJet);
        lha += pow(trpt, 1.0) * pow(trtheta, 0.25);
      }
      double lterm = pow(LJet.pt(), 1.0) * pow(1.0, 0.5);
      if (lterm !=0)  lha /= lterm;
      else            lha = -99;

      // C2
      fastjet::contrib::EnergyCorrelator ECF3(3,beta,fastjet::contrib::EnergyCorrelator::pt_R);
      fastjet::contrib::EnergyCorrelator ECF2(2,beta,fastjet::contrib::EnergyCorrelator::pt_R);
      fastjet::contrib::EnergyCorrelator ECF1(1,beta,fastjet::contrib::EnergyCorrelator::pt_R);
      double recf3 = ECF3(LJet);
      double recf2 = ECF2(LJet);
      double recf1 = ECF1(LJet);
      c2 = (recf2 != 0 ? recf3 * recf1 / (recf2*recf2) : -1);
      d2 = (recf2 != 0 ? recf3 * (recf1*recf1*recf1) /(recf2*recf2*recf2) : -1);
      ecf2 = (recf1 != 0 ? recf2 / (recf1*recf1) : -1);
      ecf3 = (recf1 != 0 ? recf3 / (recf1*recf1*recf1) : -1);

      // Fill Histograms for trimmed
      _h["dj_nsj"]->fill(nsub);
      _h["dj_c2"]->fill(c2);
      _h["dj_d2"]->fill(d2);
      _h["dj_lha"]->fill(lha);
      _h["dj_ecf2"]->fill(ecf2);
      _h["dj_ecf3"]->fill(ecf3);


      ////////////////////////////////////////////
      // Soft Drop
      fastjet::contrib::SoftDrop sd(0.0, 0.1);
      PseudoJet SDLJet = sd(fjets[uindex]);

      ClusterSequence subjet_sdcs(SDLJet.constituents(), subjet_def);

      PseudoJets sdsubjets = sorted_by_pt(subjet_sdcs.inclusive_jets(10.0));
      sdnsub = sdsubjets.size();

      for (const PseudoJet& sd_p : SDLJet.constituents()) {
        double spt = sd_p.pt();
        double stheta = sd_p.squared_distance(SDLJet);
        sdlha += pow(spt, 1.0) * pow(stheta, 0.25);
      }

      double sdterm = pow(SDLJet.pt(), 1.0) * pow(1.0, 0.5);
      if (sdterm !=0)  sdlha /= sdterm;
      else             sdlha = -99;

      double sdrecf3 = ECF3(SDLJet);
      double sdrecf2 = ECF2(SDLJet);
      double sdrecf1 = ECF1(SDLJet);

      sdc2 = (sdrecf2 != 0 ? sdrecf3 * sdrecf1 / (sdrecf2*sdrecf2) : -1);
      sdd2 = (sdrecf2 != 0 ? sdrecf3 * (sdrecf1*sdrecf1*sdrecf1) /(sdrecf2*sdrecf2*sdrecf2) : -1);

      sdecf2 = (sdrecf1 !=0 ? sdrecf2 /(sdrecf1*sdrecf1) : -1);
      sdecf3 = (sdrecf1 !=0 ? sdrecf3 / (sdrecf1*sdrecf1*sdrecf1) : -1);

      _h["dj_sdnsj"]->fill(sdnsub);
      _h["dj_sdc2"]->fill(sdc2);
      _h["dj_sdd2"]->fill(sdd2);
      _h["dj_sdlha"]->fill(sdlha);
      _h["dj_sdecf2"]->fill(sdecf2);
      _h["dj_sdecf3"]->fill(sdecf3);

    }

    void doTW(const Event& event) {

      double nsub, lha, tau21, tau32, ecf2, ecf3, c2, d2;
      double sdnsub, sdlha, sdtau21, sdtau32, sdecf2, sdecf3, sdc2, sdd2;
      double wnsub, wlha, wtau21, wtau32, wecf2, wecf3, wc2, wd2;
      double wsdnsub, wsdlha, wsdtau21, wsdtau32, wsdecf2, wsdecf3, wsdc2, wsdd2;

      lha = sdlha = wlha = wsdlha = 0.0;

      const double beta = 1, Rcut = 1;

      const vector<DressedLepton>& muons = apply<DressedLeptons>(event, "muons").dressedLeptons();
      if (muons.size() != 1)  return;

      const vector<DressedLepton>& electrons = apply<DressedLeptons>(event, "electrons").dressedLeptons();
      if (electrons.size() != 0)  return;

      const FourMomentum muonmom = muons[0].momentum();
      const MissingMomentum& missmom = apply<MissingMomentum>(event, "MissingMomentum");
      FourMomentum missvec = missmom.missingMomentum();
      double met =  missmom.missingPt();
      if (met < 20*GeV)  return;
      const double transmass = sqrt( 2 * muons[0].pT() * met * (1 - cos(deltaPhi(muons[0], missvec))) );
      if (transmass + met <= 60*GeV)  return;

      const Jets& jets  = apply<FastJets>(event, "Jets").jetsByPt(Cuts::pT > 25*GeV && Cuts::abseta < 2.5);
      if(jets.empty())  return;

      int lepJetIndex = -1;
      for (size_t i = 0; i < jets.size(); ++i) {
        const Jet& jet = jets[i];
        if ((deltaR(jet, muons[0]) < 1.5) && (deltaR(jet, muons[0]) > 0.4) ) {
          lepJetIndex = i;
          break;
        }
      }
      if (lepJetIndex < 0)  return;
      const Jet& lepjet = jets[lepJetIndex];


      const Jets fjets = apply<JetAlg>(event, "FJets").jetsByPt();
      PseudoJets tr_ljets_all;
      for (const Jet& j : fjets) {
        tr_ljets_all += _trimmer(j);
      }

      PseudoJets tr_ljets;
      for (size_t i = 0; i < tr_ljets_all.size(); ++i) {
        const PseudoJet tj = tr_ljets_all[i];
        if (tj.perp() > 150*GeV && fabs(tj.eta()) < 2.5) {
          tr_ljets += tj;
          tr_ljets[tr_ljets.size()-1].set_user_index(i);
        }
      }

      if (tr_ljets.size() < 1)  return;
      if (tr_ljets.size() > 1)  tr_ljets = sorted_by_pt(tr_ljets);

      const Jet& fjet = tr_ljets[0];
      size_t uindex = tr_ljets[0].user_index();

      const double dR_fatjet = deltaR(lepjet, fjet);
      const double dPhi_fatjet = deltaPhi(muons[0], fjet);

      if (dR_fatjet < 1.5 || dPhi_fatjet < 2.3)  return;

      Jets bjets, non_bjets;
      for (const Jet& jet : jets)
        (jet.bTagged() ? bjets : non_bjets) += jet;
      if (bjets.empty())  return;

      double min_bdR = 99;
      int bindex = 0;
      int k=0;

      for (const Jet& bjet : bjets) {
        double bdR = deltaR(fjet, bjet);
        if(bdR <  min_bdR){
	        min_bdR = bdR;
          bindex = k;
        }
    	  k++;
      }

      size_t tw = 0;
      double dR_fjet_bjet = deltaR(fjet, bjets[bindex]);
      if (fjet.abseta() < 1.5) {
        if (dR_fjet_bjet < 1.0 && fjet.mass() > 140 && fjet.pT() > 350*GeV)  tw = 1;
        if (dR_fjet_bjet > 1.0 && dR_fjet_bjet < 1.8 && fjet.mass() < 100*GeV && fjet.mass() > 60*GeV && fjet.pT() > 200*GeV) tw = 2;
      }


      // Top plots:
      if (tw==1) {

        PseudoJet LJet = fjet;
        JetDefinition subjet_def(fastjet::kt_algorithm, 0.2);
        ClusterSequence subjet_cs(LJet.constituents(), subjet_def);
        PseudoJets subjets = sorted_by_pt(subjet_cs.inclusive_jets(10.0));
        nsub = subjets.size();

        // LHA
        for (const PseudoJet& p : LJet.constituents()){
          double pt = p.pt();
          double theta = p.squared_distance(LJet);
          lha += pow(pt, 1.0) * pow(theta, 0.25);
        }
        double lterm = pow(LJet.pt(), 1.0) * pow(1.0, 0.5);
        if (lterm)  lha /= lterm;
        else        lha = -99;


        // NSubjettiness
        fastjet::contrib::Nsubjettiness nSub1(1, fastjet::contrib::OnePass_WTA_KT_Axes(), fastjet::contrib::NormalizedMeasure(beta,Rcut));
        fastjet::contrib::Nsubjettiness nSub2(2, fastjet::contrib::OnePass_WTA_KT_Axes(), fastjet::contrib::NormalizedMeasure(beta,Rcut));
        fastjet::contrib::Nsubjettiness nSub3(3, fastjet::contrib::OnePass_WTA_KT_Axes(), fastjet::contrib::NormalizedMeasure(beta,Rcut));
        double tau1 = nSub1.result(LJet);
        double tau2 = nSub2.result(LJet);
        double tau3 = nSub3.result(LJet);
        if(tau1 != 0) tau21 = tau2/tau1;
        else tau21 = -99;
        if(tau2 != 0) tau32 = tau3/tau2;
        else tau32 = -99;


        //C2
        fastjet::contrib::EnergyCorrelator ECF3(3,beta,fastjet::contrib::EnergyCorrelator::pt_R);
        fastjet::contrib::EnergyCorrelator ECF2(2,beta,fastjet::contrib::EnergyCorrelator::pt_R);
        fastjet::contrib::EnergyCorrelator ECF1(1,beta,fastjet::contrib::EnergyCorrelator::pt_R);

        double recf3 = ECF3(LJet);
        double recf2 = ECF2(LJet);
        double recf1 = ECF1(LJet);


        c2 = (recf2 != 0 ? recf3 * recf1 / (recf2*recf2) : -1);
        d2 = (recf2 != 0 ? recf3 * (recf1*recf1*recf1) /(recf2*recf2*recf2) : -1);

        ecf2 = (recf1 !=0 ? recf2 /(recf1*recf1) : -1);
        ecf3 = (recf1 !=0 ? recf3 / (recf1*recf1*recf1) : -1);

        _h["tw_nsj"]->fill(nsub);
        _h["tw_lha"]->fill(lha);
        _h["tw_tau21"]->fill(tau21);
        _h["tw_tau32"]->fill(tau32);
        _h["tw_c2"]->fill(c2);
        _h["tw_d2"]->fill(d2);
        _h["tw_ecf2"]->fill(ecf2);
        _h["tw_ecf3"]->fill(ecf3);


        // Soft Drop
        fastjet::contrib::SoftDrop sd(0.0, 0.1);
        PseudoJet SDLJet = sd(fjets[uindex]);
        ClusterSequence subjet_sdcs(SDLJet.constituents(), subjet_def);

        PseudoJets sdsubjets = sorted_by_pt(subjet_sdcs.inclusive_jets(10.0));
        sdnsub = sdsubjets.size();

        for (const PseudoJet& sd_p : SDLJet.constituents()){
          double spt = sd_p.pt();
          double stheta = sd_p.squared_distance(SDLJet);
          sdlha += pow(spt, 1.0) * pow(stheta, 0.25);
        }

        double sdlterm = pow(SDLJet.pt(), 1.0) * pow(1.0, 0.5);
        if (sdlterm)  sdlha /= sdlterm;
        else          sdlha = -99;


        double sdtau1 = nSub1.result(SDLJet);
        double sdtau2 = nSub2.result(SDLJet);
        double sdtau3 = nSub3.result(SDLJet);
        if(sdtau1 != 0) sdtau21 = sdtau2/sdtau1;
        else sdtau21 = -99;
        if(sdtau2 != 0) sdtau32 = sdtau3/sdtau2;
        else sdtau32 = -99;

        double sdrecf3 = ECF3(SDLJet);
        double sdrecf2 = ECF2(SDLJet);
        double sdrecf1 = ECF1(SDLJet);

        sdc2 = (sdrecf2 != 0 ? sdrecf3 * sdrecf1 / (sdrecf2*sdrecf2) : -1);
        sdd2 = (sdrecf2 != 0 ? sdrecf3 * (sdrecf1*sdrecf1*sdrecf1) /(sdrecf2*sdrecf2*sdrecf2) : -1);

        sdecf2 = (sdrecf1 !=0 ? sdrecf2 /(sdrecf1*sdrecf1) : -1);
        sdecf3 = (sdrecf1 !=0 ? sdrecf3 / (sdrecf1*sdrecf1*sdrecf1) : -1);

        _h["tw_sdnsj"]->fill(sdnsub);
        _h["tw_sdlha"]->fill(sdlha);
        _h["tw_sdtau21"]->fill(sdtau21);
        _h["tw_sdtau32"]->fill(sdtau32);
        _h["tw_sdc2"]->fill(sdc2);
        _h["tw_sdd2"]->fill(sdd2);
        _h["tw_sdecf2"]->fill(sdecf2);
        _h["tw_sdecf3"]->fill(sdecf3);

      }


      // W plots

      if(tw ==2){

        PseudoJet LJet = fjet;
        JetDefinition subjet_def(fastjet::kt_algorithm, 0.2);
        ClusterSequence subjet_cs(LJet.constituents(), subjet_def);

        PseudoJets subjets = sorted_by_pt(subjet_cs.inclusive_jets(10.0));
        wnsub = subjets.size();

        // LHA
        for (const PseudoJet& wp : LJet.constituents()){
          double wpt = wp.pt();
          double wtheta = wp.squared_distance(fjet);
          wlha += pow(wpt, 1.0) * pow(wtheta, 0.25);
        }

        double fterm = pow(fjet.pt(), 1.0) * pow(1.0, 0.5);
        if (fterm)  wlha /= fterm;
        else        wlha = -99;



        // NSubjettiness

        fastjet::contrib::Nsubjettiness nSub1(1, fastjet::contrib::OnePass_WTA_KT_Axes(), fastjet::contrib::NormalizedMeasure(beta,Rcut));
        fastjet::contrib::Nsubjettiness nSub2(2, fastjet::contrib::OnePass_WTA_KT_Axes(), fastjet::contrib::NormalizedMeasure(beta,Rcut));
        fastjet::contrib::Nsubjettiness nSub3(3, fastjet::contrib::OnePass_WTA_KT_Axes(), fastjet::contrib::NormalizedMeasure(beta,Rcut));
        double wtau1 = nSub1.result(LJet);
        double wtau2 = nSub2.result(LJet);
        double wtau3 = nSub3.result(LJet);
        if(wtau1 != 0) wtau21 = wtau2/wtau1;
        else wtau21 = -99;
        if(wtau2 != 0) wtau32 = wtau3/wtau2;
        else wtau32 = -99;

        //C2
        fastjet::contrib::EnergyCorrelator ECF3(3,beta,fastjet::contrib::EnergyCorrelator::pt_R);
        fastjet::contrib::EnergyCorrelator ECF2(2,beta,fastjet::contrib::EnergyCorrelator::pt_R);
        fastjet::contrib::EnergyCorrelator ECF1(1,beta,fastjet::contrib::EnergyCorrelator::pt_R);

        double wrecf3 = ECF3(LJet);
        double wrecf2 = ECF2(LJet);
        double wrecf1 = ECF1(LJet);

        wc2 = (wrecf2 != 0 ? wrecf3 * wrecf1 / (wrecf2*wrecf2) : -1);
        wd2 = (wrecf2 != 0 ? wrecf3 * (wrecf1*wrecf1*wrecf1) /(wrecf2*wrecf2*wrecf2) : -1);

        wecf2 = (wrecf1 !=0 ? wrecf2 /(wrecf1*wrecf1) : -1);
        wecf3 = (wrecf1 !=0 ? wrecf3 / (wrecf1*wrecf1*wrecf1) : -1);

        _h["tw_wnsj"]->fill(wnsub);
        _h["tw_wlha"]->fill(wlha);
        _h["tw_wtau21"]->fill(wtau21);
        _h["tw_wtau32"]->fill(wtau32);
        _h["tw_wc2"]->fill(wc2);
        _h["tw_wd2"]->fill(wd2);
        _h["tw_wecf2"]->fill(wecf2);
        _h["tw_wecf3"]->fill(wecf3);


        //SD
        fastjet::contrib::SoftDrop sd(0.0, 0.1);
        PseudoJet SDLJet = sd(fjets[uindex]);
        ClusterSequence subjet_sdcs(SDLJet.constituents(), subjet_def);

        PseudoJets sdsubjets = sorted_by_pt(subjet_sdcs.inclusive_jets(10.0));
        wsdnsub = sdsubjets.size();

        for (const PseudoJet& sd_p : SDLJet.constituents()){
          double spt = sd_p.pt();
          double stheta = sd_p.squared_distance(SDLJet);
          wsdlha += pow(spt, 1.0) * pow(stheta, 0.25);
        }

        double wsdlterm = pow(SDLJet.pt(), 1.0) * pow(1.0, 0.5);
        if (wsdlterm)  wsdlha /= wsdlterm;
        else          wsdlha = -99;


        double wsdtau1 = nSub1.result(SDLJet);
        double wsdtau2 = nSub2.result(SDLJet);
        double wsdtau3 = nSub3.result(SDLJet);
        if (wsdtau1 != 0) wsdtau21 = wsdtau2/wsdtau1;
        else wsdtau21 = -99;
        if (wsdtau2 != 0) wsdtau32 = wsdtau3/wsdtau2;
        else wsdtau32 = -99;

        double wsdrecf3 = ECF3(SDLJet);
        double wsdrecf2 = ECF2(SDLJet);
        double wsdrecf1 = ECF1(SDLJet);

        wsdc2 = (wsdrecf2 != 0 ? wsdrecf3 * wsdrecf1 / (wsdrecf2*wsdrecf2) : -1);
        wsdd2 = (wsdrecf2 != 0 ? wsdrecf3 * (wsdrecf1*wsdrecf1*wsdrecf1) /(wsdrecf2*wsdrecf2*wsdrecf2) : -1);

        wsdecf2 = (wsdrecf1 !=0 ? wsdrecf2 /(wsdrecf1*wsdrecf1) : -1);
        wsdecf3 = (wsdrecf1 !=0 ? wsdrecf3 / (wsdrecf1*wsdrecf1*wsdrecf1) : -1);

        _h["tw_wsdnsj"]->fill(wsdnsub);
        _h["tw_wsdlha"]->fill(wsdlha);
        _h["tw_wsdtau21"]->fill(wsdtau21);
        _h["tw_wsdtau32"]->fill(wsdtau32);
        _h["tw_wsdc2"]->fill(wsdc2);
        _h["tw_wsdd2"]->fill(wsdd2);
        _h["tw_wsdecf2"]->fill(wsdecf2);
        _h["tw_wsdecf3"]->fill(wsdecf3);

      }
    }


    void finalize() {
      for (auto hist : _h) { normalize(hist.second); }
    }

  private:

    fastjet::Filter _trimmer;
    map<string, Histo1DPtr> _h;

  protected:
    size_t _mode;
  };

  // The hook for the plugin system
  RIVET_DECLARE_PLUGIN(ATLAS_2019_I1724098);
}