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
| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/IdentifiedFinalState.hh"
#include "Rivet/Projections/VetoedFinalState.hh"
#include "Rivet/Projections/FastJets.hh"
#include "Rivet/Projections/DressedLeptons.hh"
#include "Rivet/Projections/MissingMomentum.hh"
namespace Rivet {
/// ATLAS Wee Wemu Wmumu analysis at Z TeV
class ATLAS_2013_I1190187 : public Analysis {
public:
/// Default constructor
ATLAS_2013_I1190187()
: Analysis("ATLAS_2013_I1190187")
{ }
void init() {
FinalState fs;
Cut etaRanges_EL = (Cuts::abseta < 1.37 || Cuts::absetaIn(1.52, 2.47)) && Cuts::pT > 20*GeV;
Cut etaRanges_MU = Cuts::abseta < 2.4 && Cuts::pT > 20*GeV;
MissingMomentum met(fs);
declare(met, "MET");
IdentifiedFinalState Photon(fs);
Photon.acceptIdPair(PID::PHOTON);
IdentifiedFinalState bare_EL(fs);
bare_EL.acceptIdPair(PID::ELECTRON);
IdentifiedFinalState bare_MU(fs);
bare_MU.acceptIdPair(PID::MUON);
IdentifiedFinalState neutrinoFS(fs);
neutrinoFS.acceptNeutrinos();
declare(neutrinoFS, "Neutrinos");
////////////////////////////////////////////////////////
// DRESSED LEPTONS
// 3.arg: 0.1 = dR(lep,phot)
// 4.arg: true = do clustering
// 7.arg: false = ignore photons from hadron or tau
//
//////////////////////////////////////////////////////////
DressedLeptons electronFS(Photon, bare_EL, 0.1, etaRanges_EL);
declare(electronFS, "ELECTRON_FS");
DressedLeptons muonFS(Photon, bare_MU, 0.1, etaRanges_MU);
declare(muonFS, "MUON_FS");
VetoedFinalState jetinput;
jetinput.addVetoOnThisFinalState(bare_MU);
jetinput.addVetoOnThisFinalState(neutrinoFS);
FastJets jetpro(jetinput, FastJets::ANTIKT, 0.4);
declare(jetpro, "jet");
// Book histograms
book(_h_Wl1_pT_mumu ,1, 1, 2);
book(_h_Wl1_pT_ee ,1, 1, 1);
book(_h_Wl1_pT_emu ,1, 1, 3);
book(_h_Wl1_pT_inclusive ,4, 1, 1);
}
/// Do the analysis
void analyze(const Event& e) {
const vector<DressedLepton>& muonFS = apply<DressedLeptons>(e, "MUON_FS").dressedLeptons();
const vector<DressedLepton>& electronFS = apply<DressedLeptons>(e, "ELECTRON_FS").dressedLeptons();
const MissingMomentum& met = apply<MissingMomentum>(e, "MET");
vector<DressedLepton> dressed_lepton, isolated_lepton, fiducial_lepton;
dressed_lepton.insert(dressed_lepton.end(), muonFS.begin(), muonFS.end());
dressed_lepton.insert(dressed_lepton.end(), electronFS.begin(), electronFS.end());
////////////////////////////////////////////////////////////////////////////
// OVERLAP REMOVAL
// -electrons with dR(e,mu)<0.1 are removed
// -lower pT electrons with dR(e,e)<0.1 are removed
//
////////////////////////////////////////////////////////////////////////////
for (DressedLepton& l1 : dressed_lepton) {
bool l_isolated = true;
for (DressedLepton& l2 : dressed_lepton) {
if (!isSame(l1, l2) && l2.constituentLepton().abspid() == PID::ELECTRON) {
double overlapControl_ll= deltaR(l1.constituentLepton(),l2.constituentLepton());
if (overlapControl_ll < 0.1) {
l_isolated = false;
// e/e overlap removal
if (l1.constituentLepton().abspid() == PID::ELECTRON) {
if (l1.constituentLepton().pT()>l2.constituentLepton().pT()) {
isolated_lepton.push_back(l1);//keep e with highest pT
} else {
isolated_lepton.push_back(l2);//keep e with highest pT
}
}
// e/mu overlap removal
if (l1.constituentLepton().abspid() == PID::MUON) isolated_lepton.push_back(l1); //keep mu
}
}
}
if (l_isolated) isolated_lepton.push_back(l1);
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////
// PRESELECTION:
// "isolated_lepton:"
// * electron: pt>20 GeV, |eta|<1.37, 1.52<|eta|<2.47, dR(electron,muon)>0.1
// * muon: pt>20 GeV, |eta|<2.4
// * dR(l,l)>0.1
//
// "fiducial_lepton"= isolated_lepton with
// * 2 leptons (e or mu)
// * leading lepton pt (pT_l1) >25 GeV
// * opposite charged leptons
//
///////////////////////////////////////////////////////////////////////////////////////////////////////////
if (isolated_lepton.size() != 2) vetoEvent;
sort(isolated_lepton.begin(), isolated_lepton.end(), cmpMomByPt);
if (isolated_lepton[0].pT() > 25*GeV && charge3(isolated_lepton[0]) != charge3(isolated_lepton[1])) {
fiducial_lepton.insert(fiducial_lepton.end(), isolated_lepton.begin(), isolated_lepton.end());
}
if (fiducial_lepton.size() == 0) vetoEvent;
double pT_l1 = fiducial_lepton[0].pT();
double M_l1l2 = (fiducial_lepton[0].momentum() + fiducial_lepton[1].momentum()).mass();
double pT_l1l2 = (fiducial_lepton[0].momentum() + fiducial_lepton[1].momentum()).pT();
/////////////////////////////////////////////////////////////////////////
// JETS
// -"alljets": found by "jetpro" projection && pT()>25 GeV && |y|<4.5
// -"vetojets": "alljets" && dR(electron,jet)>0.3
//
/////////////////////////////////////////////////////////////////////////
Jets alljets, vetojets;
for (const Jet& j : apply<FastJets>(e, "jet").jetsByPt(25)) {
if (j.absrap() > 4.5 ) continue;
alljets.push_back(j);
bool deltaRcontrol = true;
for (DressedLepton& fl : fiducial_lepton) {
if (fl.constituentLepton().abspid() == PID::ELECTRON) { //electrons
double deltaRjets = deltaR(fl.constituentLepton().momentum(), j.momentum(), RAPIDITY);
if (deltaRjets <= 0.3) deltaRcontrol = false; //false if at least one electron is in the overlap region
}
}
if (deltaRcontrol) vetojets.push_back(j);
}
/////////////////////////////////////////////////////////////////////////////////////////////////
// MISSING ETrel
// -"mismom": fourvector of invisible momentum found by "met" projection
// -"delta_phi": delta phi between mismom and the nearest "fiducial_lepton" or "vetojet"
// -"MET_rel": missing transverse energy defined as:
// *"mismom" for "delta_phi" >= (0.5*pi)
// *"mismom.pT()*sin(delta_phi)" for "delta_phi" < (0.5*pi)
//
/////////////////////////////////////////////////////////////////////////////////////////////////
FourMomentum mismom;
double MET_rel = 0, delta_phi = 0;
mismom = -met.visibleMomentum();
vector<double> vL_MET_angle, vJet_MET_angle;
vL_MET_angle.push_back(fabs(deltaPhi(fiducial_lepton[0].momentum(), mismom)));
vL_MET_angle.push_back(fabs(deltaPhi(fiducial_lepton[1].momentum(), mismom)));
for (double& lM : vL_MET_angle) if (lM > M_PI) lM = 2*M_PI - lM;
std::sort(vL_MET_angle.begin(), vL_MET_angle.end());
if (vetojets.size() == 0) delta_phi = vL_MET_angle[0];
if (vetojets.size() > 0) {
for (Jet& vj : vetojets) {
double jet_MET_angle = fabs(deltaPhi(vj.momentum(), mismom));
if (jet_MET_angle > M_PI) jet_MET_angle = 2*M_PI - jet_MET_angle;
vJet_MET_angle.push_back(jet_MET_angle);
}
std::sort(vJet_MET_angle.begin(), vJet_MET_angle.end());
if (vL_MET_angle[0] <= vJet_MET_angle[0]) delta_phi = vL_MET_angle[0];
if (vL_MET_angle[0] > vJet_MET_angle[0]) delta_phi = vJet_MET_angle[0];
}
if (delta_phi >= (0.5*M_PI)) delta_phi = 0.5*M_PI;
MET_rel = mismom.pT()*sin(delta_phi);
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// CUTS
// -jetveto: event with at least one vetojet is vetoed
// -M_Z: Z mass M_Z=91.1876*GeV
//
// * ee channel: MET_rel > 45 GeV, M_l1l2 > 15 GeV, |M_l1l2-M_Z| > 15 GeV, jetveto, pT_l1l2 > 30 GeV
// * mumu channel: MET_rel > 45 GeV, M_l1l2 > 15 GeV, |M_l1l2-M_Z| > 15 GeV, jetveto, pT_l1l2 > 30 GeV
// * emu channel: MET_rel > 25 GeV, M_l1l2 > 10 GeV, |M_l1l2-M_Z| > 0 GeV, jetveto, pT_l1l2 > 30 GeV
//
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// ee channel
if (fiducial_lepton[0].abspid() == PID::ELECTRON && fiducial_lepton[1].abspid() == PID::ELECTRON) {
if (MET_rel <= 45*GeV) vetoEvent;
if (M_l1l2 <= 15*GeV) vetoEvent;
if (fabs(M_l1l2 - 91.1876*GeV) <= 15*GeV) vetoEvent;
if (vetojets.size() != 0) vetoEvent;
if (pT_l1l2 <= 30*GeV) vetoEvent;
_h_Wl1_pT_ee->fill(sqrtS()*GeV);
_h_Wl1_pT_inclusive->fill(pT_l1);
}
// mumu channel
else if (fiducial_lepton[0].abspid() == PID::MUON && fiducial_lepton[1].abspid() == PID::MUON) {
if (MET_rel <= 45*GeV) vetoEvent;
if (M_l1l2 <= 15*GeV) vetoEvent;
if (fabs(M_l1l2-91.1876*GeV) <= 15*GeV) vetoEvent;
if (vetojets.size() != 0) vetoEvent;
if (pT_l1l2 <= 30*GeV) vetoEvent;
_h_Wl1_pT_mumu->fill(sqrtS()*GeV);
_h_Wl1_pT_inclusive->fill(pT_l1);
}
// emu channel
else if (fiducial_lepton[0].abspid() != fiducial_lepton[1].abspid()) {
if (MET_rel <= 25*GeV) vetoEvent;
if (M_l1l2 <= 10*GeV) vetoEvent;
if (vetojets.size() != 0) vetoEvent;
if (pT_l1l2 <= 30*GeV) vetoEvent;
_h_Wl1_pT_emu->fill(sqrtS()*GeV);
_h_Wl1_pT_inclusive->fill(pT_l1);
}
}
/// Finalize
void finalize() {
const double norm = crossSection()/sumOfWeights()/femtobarn;
scale(_h_Wl1_pT_ee, norm);
scale(_h_Wl1_pT_mumu, norm);
scale(_h_Wl1_pT_emu, norm);
normalize(_h_Wl1_pT_inclusive, 1);
}
private:
Histo1DPtr _h_Wl1_pT_ee, _h_Wl1_pT_mumu, _h_Wl1_pT_emu, _h_Wl1_pT_inclusive;
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(ATLAS_2013_I1190187);
}
|