|
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
|
#include <iostream>
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/ParameterSet/interface/ConfigurationDescriptions.h"
#include "DataFormats/Candidate/interface/CandidateFwd.h"
#include "DataFormats/RecoCandidate/interface/RecoCandidate.h"
#include "DataFormats/RecoCandidate/interface/RecoChargedCandidate.h"
#include "DataFormats/RecoCandidate/interface/RecoChargedCandidateFwd.h"
#include "DataFormats/Candidate/interface/Candidate.h"
#include "DataFormats/HLTReco/interface/TriggerFilterObjectWithRefs.h"
#include "DataFormats/HLTReco/interface/TriggerRefsCollections.h"
#include "DataFormats/TrackReco/interface/TrackFwd.h"
#include "DataFormats/TrackReco/interface/Track.h"
#include "DataFormats/VertexReco/interface/Vertex.h"
#include "DataFormats/VertexReco/interface/VertexFwd.h"
#include "DataFormats/Common/interface/RefToBase.h"
#include "RecoVertex/KalmanVertexFit/interface/KalmanVertexFitter.h"
#include "RecoVertex/VertexPrimitives/interface/TransientVertex.h"
#include "HLTDisplacedmumumuVtxProducer.h"
using namespace edm;
using namespace reco;
using namespace std;
using namespace trigger;
//
// constructors and destructor
//
HLTDisplacedmumumuVtxProducer::HLTDisplacedmumumuVtxProducer(const edm::ParameterSet& iConfig)
: transientTrackRecordToken_(esConsumes(edm::ESInputTag("", "TransientTrackBuilder"))),
srcTag_(iConfig.getParameter<edm::InputTag>("Src")),
srcToken_(consumes<reco::RecoChargedCandidateCollection>(srcTag_)),
previousCandTag_(iConfig.getParameter<edm::InputTag>("PreviousCandTag")),
previousCandToken_(consumes<trigger::TriggerFilterObjectWithRefs>(previousCandTag_)),
maxEta_(iConfig.getParameter<double>("MaxEta")),
minPt_(iConfig.getParameter<double>("MinPt")),
minPtTriplet_(iConfig.getParameter<double>("MinPtTriplet")),
minInvMass_(iConfig.getParameter<double>("MinInvMass")),
maxInvMass_(iConfig.getParameter<double>("MaxInvMass")),
chargeOpt_(iConfig.getParameter<int>("ChargeOpt")) {
produces<VertexCollection>();
}
HLTDisplacedmumumuVtxProducer::~HLTDisplacedmumumuVtxProducer() = default;
void HLTDisplacedmumumuVtxProducer::fillDescriptions(edm::ConfigurationDescriptions& descriptions) {
edm::ParameterSetDescription desc;
desc.add<edm::InputTag>("Src", edm::InputTag("hltL3MuonCandidates"));
desc.add<edm::InputTag>("PreviousCandTag", edm::InputTag(""));
desc.add<double>("MaxEta", 2.5);
desc.add<double>("MinPt", 0.0);
desc.add<double>("MinPtTriplet", 0.0);
desc.add<double>("MinInvMass", 1.0);
desc.add<double>("MaxInvMass", 20.0);
desc.add<int>("ChargeOpt", -1);
descriptions.add("hltDisplacedmumumuVtxProducer", desc);
}
// ------------ method called on each new Event ------------
void HLTDisplacedmumumuVtxProducer::produce(edm::StreamID, edm::Event& iEvent, const edm::EventSetup& iSetup) const {
double const MuMass = 0.106;
double const MuMass2 = MuMass * MuMass;
// get hold of muon trks
Handle<RecoChargedCandidateCollection> mucands;
iEvent.getByToken(srcToken_, mucands);
// get the transient track builder
auto const& theB = iSetup.getHandle(transientTrackRecordToken_);
std::unique_ptr<VertexCollection> vertexCollection(new VertexCollection());
// look at all mucands, check cuts and make vertices
double e1, e2, e3;
Particle::LorentzVector p, p1, p2, p3;
RecoChargedCandidateCollection::const_iterator cand1;
RecoChargedCandidateCollection::const_iterator cand2;
RecoChargedCandidateCollection::const_iterator cand3;
// get the objects passing the previous filter
Handle<TriggerFilterObjectWithRefs> previousCands;
iEvent.getByToken(previousCandToken_, previousCands);
vector<RecoChargedCandidateRef> vPrevCands;
previousCands->getObjects(TriggerMuon, vPrevCands);
for (cand1 = mucands->begin(); cand1 != mucands->end(); cand1++) {
TrackRef tk1 = cand1->get<TrackRef>();
LogDebug("HLTDisplacedMumumuFilter") << " 1st muon in loop: q*pt= " << cand1->charge() * cand1->pt()
<< ", eta= " << cand1->eta() << ", hits= " << tk1->numberOfValidHits();
//first check if this muon passed the previous filter
if (!checkPreviousCand(tk1, vPrevCands))
continue;
// cuts
if (fabs(cand1->eta()) > maxEta_)
continue;
if (cand1->pt() < minPt_)
continue;
cand2 = cand1;
cand2++;
for (; cand2 != mucands->end(); cand2++) {
TrackRef tk2 = cand2->get<TrackRef>();
// eta cut
LogDebug("HLTMuonDimuonFilter") << " 2nd muon in loop: q*pt= " << cand2->charge() * cand2->pt()
<< ", eta= " << cand2->eta() << ", hits= " << tk2->numberOfValidHits()
<< ", d0= " << tk2->d0();
//first check if this muon passed the previous filter
if (!checkPreviousCand(tk2, vPrevCands))
continue;
// cuts
if (fabs(cand2->eta()) > maxEta_)
continue;
if (cand2->pt() < minPt_)
continue;
cand3 = cand2;
cand3++;
for (; cand3 != mucands->end(); cand3++) {
TrackRef tk3 = cand3->get<TrackRef>();
// eta cut
LogDebug("HLTMuonDimuonFilter") << " 3rd muon in loop: q*pt= " << cand3->charge() * cand3->pt()
<< ", eta= " << cand3->eta() << ", hits= " << tk3->numberOfValidHits()
<< ", d0= " << tk3->d0();
//first check if this muon passed the previous filter
if (!checkPreviousCand(tk3, vPrevCands))
continue;
// cuts
if (fabs(cand3->eta()) > maxEta_)
continue;
if (cand3->pt() < minPt_)
continue;
// opposite sign or same sign
if (chargeOpt_ > 0) {
if (fabs(cand1->charge() + cand2->charge() + cand3->charge()) != chargeOpt_)
continue;
}
// Combined dimuon system
e1 = sqrt(cand1->momentum().Mag2() + MuMass2);
e2 = sqrt(cand2->momentum().Mag2() + MuMass2);
e3 = sqrt(cand3->momentum().Mag2() + MuMass2);
p1 = Particle::LorentzVector(cand1->px(), cand1->py(), cand1->pz(), e1);
p2 = Particle::LorentzVector(cand2->px(), cand2->py(), cand2->pz(), e2);
p3 = Particle::LorentzVector(cand3->px(), cand3->py(), cand3->pz(), e3);
p = p1 + p2 + p3;
if (p.pt() < minPtTriplet_)
continue;
double invmass = abs(p.mass());
LogDebug("HLTDisplacedMumumuFilter") << " ... 1-2 invmass= " << invmass;
if (invmass < minInvMass_)
continue;
if (invmass > maxInvMass_)
continue;
// do the vertex fit
vector<TransientTrack> t_tks;
TransientTrack ttkp1 = (*theB).build(&tk1);
TransientTrack ttkp2 = (*theB).build(&tk2);
TransientTrack ttkp3 = (*theB).build(&tk3);
t_tks.push_back(ttkp1);
t_tks.push_back(ttkp2);
t_tks.push_back(ttkp3);
if (t_tks.size() != 3)
continue;
KalmanVertexFitter kvf;
TransientVertex tv = kvf.vertex(t_tks);
if (!tv.isValid())
continue;
Vertex vertex = tv;
// put vertex in the event
vertexCollection->push_back(vertex);
}
}
}
iEvent.put(std::move(vertexCollection));
}
bool HLTDisplacedmumumuVtxProducer::checkPreviousCand(const TrackRef& trackref,
const vector<RecoChargedCandidateRef>& refVect) const {
bool ok = false;
for (auto& i : refVect) {
if (i->get<TrackRef>() == trackref) {
ok = true;
break;
}
}
return ok;
}
|