Rivet analyses referenceCMS_2017_I1610623Differential cross-sections for W boson and jets in proton-proton collisions at 13 TeVExperiment: CMS (LHC) Inspire ID: 1610623 Status: VALIDATED Authors:
Beam energies: (6500.0, 6500.0) GeV Run details:
Differential cross sections for a W boson produced in association with jets are measured in a data sample of proton-proton collisions at a center-of-mass energy of 13 TeV recorded with the CMS detector and corresponding to an integrated luminosity of 2.2 inverse femtobarns. The W bosons are identified through their decay into a muon and a neutrino. The cross sections are reported as functions of jet multiplicity, jet transverse momenta, jet rapidity $|y|$, the scalar sum of jet transverse momenta ($H_T$), and angular correlations between the muon and each jet for different jet multiplicities. The cross sections are measured in the fiducial region defined by a muon with $p_T > 25$ GeV and pseudorapidity $|\eta| < 2.4$, and by a transverse mass between the muon and the missing transverse energy $M_T > 50$ GeV. Jets are reconstructed using the anti-kT algorithm with a distance parameter R = 0.4, and only jets with $p_T > 30$ GeV, $|y| < 2.4$, and a separation of $\Delta R > 0.4$ from the muon are considered. In addition, the differential cross section is measured as a function of the angular distance (DeltaR) between the muon and the closest jet for events with one or more jets, requiring jets with $p_T > 100$ GeV and the leading jet with $p_T > 300$ GeV. Source code: CMS_2017_I1610623.cc 1// -*- C++ -*-
2#include "Rivet/Analysis.hh"
3#include "Rivet/Projections/FinalState.hh"
4#include "Rivet/Projections/FastJets.hh"
5#include "Rivet/Projections/VetoedFinalState.hh"
6#include "Rivet/Projections/LeptonFinder.hh"
7#include "Rivet/Projections/MissingMomentum.hh"
8
9namespace Rivet {
10
11
12 /// Differential cross-sections for W boson and jets in proton-proton collisions at 13 TeV
13 class CMS_2017_I1610623 : public Analysis {
14 public:
15
16 /// Constructor
17 RIVET_DEFAULT_ANALYSIS_CTOR(CMS_2017_I1610623);
18
19
20 /// @name Analysis methods
21 /// @{
22
23 /// Book histograms and initialise projections before the run
24 void init() {
25
26 // Initialise and register projections
27 LeptonFinder lf(0.1, Cuts::abseta < 2.4 && Cuts::abspid == PID::MUON);
28 declare(lf, "Leptons");
29 declare(MissingMom(), "MET");
30
31 // Define veto FS
32 VetoedFinalState vfs;
33 vfs.addVetoOnThisFinalState(lf);
34 vfs.addVetoPairId(PID::MUON);
35 vfs.vetoNeutrinos();
36
37 FastJets fastjets(vfs, JetAlg::ANTIKT, 0.4);
38 declare(fastjets, "Jets");
39
40
41 book(_hist_Mult_exc ,"d01-x01-y01");
42 book(_hist_inc_WJetMult ,"d02-x01-y01");
43
44 book(_hist_JetPt1j ,"d03-x01-y01");
45 book(_hist_JetPt2j ,"d04-x01-y01");
46 book(_hist_JetPt3j ,"d05-x01-y01");
47 book(_hist_JetPt4j ,"d06-x01-y01");
48
49 book(_hist_JetRap1j ,"d07-x01-y01");
50 book(_hist_JetRap2j ,"d08-x01-y01");
51 book(_hist_JetRap3j ,"d09-x01-y01");
52 book(_hist_JetRap4j ,"d10-x01-y01");
53
54 book(_hist_Ht_1j ,"d11-x01-y01");
55 book(_hist_Ht_2j ,"d12-x01-y01");
56 book(_hist_Ht_3j ,"d13-x01-y01");
57 book(_hist_Ht_4j ,"d14-x01-y01");
58
59 book(_hist_dphij1mu_1j , "d15-x01-y01");
60 book(_hist_dphij2mu_2j , "d16-x01-y01");
61 book(_hist_dphij3mu_3j , "d17-x01-y01");
62 book(_hist_dphij4mu_4j , "d18-x01-y01");
63
64 book(_hist_dRmuj_1j , "d19-x01-y01");
65
66 }
67
68
69 /// Used for filling inc Njets histo
70 void _fill(Histo1DPtr& _histJetMult, vector<FourMomentum>& finaljet_list) {
71 _histJetMult->fill(0);
72 for (size_t i=0 ; i<finaljet_list.size() ; ++i) {
73 if (i==6) break;
74 _histJetMult->fill(i+1); // inclusive multiplicity
75 }
76 }
77
78
79 /// Perform the per-event analysis
80 void analyze(const Event& event) {
81
82 // Identify the closest-matching mu+MET to m == mW
83 const P4& pmiss = apply<MissingMom>(event, "MET").missingMom();
84 const Particles& mus = apply<LeptonFinder>(event, "Leptons").particles();
85 const Particles mus_mtfilt = select(mus, [&](const Particle& m){ return mT(m, pmiss) > 50*GeV; });
86 const int imfound = closestMatchIndex(mus_mtfilt, pmiss, Kin::mass, 80.4*GeV);
87
88 // Make cuts on the identified mT and lepton
89 if (imfound < 0) vetoEvent;
90 const FourMomentum& lepton0 = mus_mtfilt[imfound].momentum();
91 if (lepton0.abseta() > 2.4 || lepton0.pT() < 25.0*GeV) vetoEvent;
92
93 // Obtain the jets
94 vector<FourMomentum> finaljet_list, jet100_list;
95 double HT = 0.0;
96 const Jets& js = apply<FastJets>(event, "Jets").jetsByPt(Cuts::pT > 30*GeV && Cuts::absrap < 2.4);
97 for (const Jet& j : js) {
98 const double jpt = j.momentum().pT();
99 if (deltaR(lepton0, j.momentum()) > 0.4) {
100 if (jpt > 30.0*GeV) {
101 finaljet_list.push_back(j.momentum());
102 HT += j.momentum().pT();
103 }
104 if (jpt > 100.0*GeV) {
105 jet100_list.push_back(j.momentum());
106 }
107 }
108 }
109
110 // Multiplicity plots
111 _hist_Mult_exc->fill(finaljet_list.size());
112 _fill(_hist_inc_WJetMult, finaljet_list);
113
114 // dRmuj plot.
115 double mindR(99999);
116 if (jet100_list.size() >= 1) {
117 for (unsigned ji = 0; ji < jet100_list.size(); ji++){
118 double dr_(9999);
119 dr_ = fabs(deltaR(lepton0, jet100_list[ji]));
120 if (dr_ < mindR){
121 mindR = dr_;
122 }
123 }
124 if (jet100_list[0].pT() > 300.0*GeV) {
125 _hist_dRmuj_1j->fill(mindR);
126 }
127 }
128
129 if (finaljet_list.size()>=1) {
130 _hist_JetPt1j->fill(finaljet_list[0].pT());
131 _hist_JetRap1j->fill(fabs(finaljet_list[0].rap()));
132 _hist_Ht_1j->fill(HT);
133 _hist_dphij1mu_1j->fill(deltaPhi(finaljet_list[0].phi(), lepton0.phi()));
134 }
135
136 if (finaljet_list.size()>=2) {
137 _hist_JetPt2j->fill(finaljet_list[1].pT());
138 _hist_JetRap2j->fill(fabs(finaljet_list[1].rap()));
139 _hist_Ht_2j->fill(HT);
140 _hist_dphij2mu_2j->fill(deltaPhi(finaljet_list[1].phi(), lepton0.phi()));
141 }
142
143 if (finaljet_list.size()>=3) {
144 _hist_JetPt3j->fill(finaljet_list[2].pT());
145 _hist_JetRap3j->fill(fabs(finaljet_list[2].rap()));
146 _hist_Ht_3j->fill(HT);
147 _hist_dphij3mu_3j->fill(deltaPhi(finaljet_list[2].phi(), lepton0.phi()));
148 }
149
150 if (finaljet_list.size()>=4) {
151 _hist_JetPt4j->fill(finaljet_list[3].pT());
152 _hist_JetRap4j->fill(fabs(finaljet_list[3].rap()));
153 _hist_Ht_4j->fill(HT);
154 _hist_dphij4mu_4j->fill(deltaPhi(finaljet_list[3].phi(), lepton0.phi()));
155 }
156 }
157
158
159 /// Normalise histograms etc., after the run
160 void finalize() {
161 const double crossec = !std::isnan(crossSectionPerEvent()) ? crossSection() : 61526.7*picobarn;
162 if (std::isnan(crossSectionPerEvent())){
163 MSG_INFO("No valid cross-section given, using NNLO xsec calculated by FEWZ " << crossec/picobarn << " pb");
164 }
165
166 scale(_hist_Mult_exc, crossec/picobarn/sumOfWeights());
167 scale(_hist_inc_WJetMult, crossec/picobarn/sumOfWeights());
168
169 scale(_hist_JetPt1j, crossec/picobarn/sumOfWeights());
170 scale(_hist_JetPt2j, crossec/picobarn/sumOfWeights());
171 scale(_hist_JetPt3j, crossec/picobarn/sumOfWeights());
172 scale(_hist_JetPt4j, crossec/picobarn/sumOfWeights());
173
174 scale(_hist_JetRap1j, crossec/picobarn/sumOfWeights());
175 scale(_hist_JetRap2j, crossec/picobarn/sumOfWeights());
176 scale(_hist_JetRap3j, crossec/picobarn/sumOfWeights());
177 scale(_hist_JetRap4j, crossec/picobarn/sumOfWeights());
178
179 scale(_hist_Ht_1j, crossec/picobarn/sumOfWeights());
180 scale(_hist_Ht_2j, crossec/picobarn/sumOfWeights());
181 scale(_hist_Ht_3j, crossec/picobarn/sumOfWeights());
182 scale(_hist_Ht_4j, crossec/picobarn/sumOfWeights());
183
184 scale(_hist_dphij1mu_1j, crossec/picobarn/sumOfWeights());
185 scale(_hist_dphij2mu_2j, crossec/picobarn/sumOfWeights());
186 scale(_hist_dphij3mu_3j, crossec/picobarn/sumOfWeights());
187 scale(_hist_dphij4mu_4j, crossec/picobarn/sumOfWeights());
188
189 scale(_hist_dRmuj_1j, crossec/picobarn/sumOfWeights());
190 }
191
192 /// @}
193
194
195 private:
196
197 /// @name Histograms
198 /// @{
199 Histo1DPtr _hist_Mult_exc;
200 Histo1DPtr _hist_inc_WJetMult;
201
202 Histo1DPtr _hist_JetPt1j;
203 Histo1DPtr _hist_JetPt2j;
204 Histo1DPtr _hist_JetPt3j;
205 Histo1DPtr _hist_JetPt4j;
206
207 Histo1DPtr _hist_JetRap1j;
208 Histo1DPtr _hist_JetRap2j;
209 Histo1DPtr _hist_JetRap3j;
210 Histo1DPtr _hist_JetRap4j;
211
212 Histo1DPtr _hist_Ht_1j;
213 Histo1DPtr _hist_Ht_2j;
214 Histo1DPtr _hist_Ht_3j;
215 Histo1DPtr _hist_Ht_4j;
216
217 Histo1DPtr _hist_dphij1mu_1j;
218 Histo1DPtr _hist_dphij2mu_2j;
219 Histo1DPtr _hist_dphij3mu_3j;
220 Histo1DPtr _hist_dphij4mu_4j;
221
222 Histo1DPtr _hist_dRmuj_1j;
223 /// @}
224
225 };
226
227
228 RIVET_DECLARE_PLUGIN(CMS_2017_I1610623);
229
230}
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