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
| // -*- C++ -*-
#include "Rivet/Analyses/MC_JetAnalysis.hh"
#include "Rivet/Projections/ZFinder.hh"
#include "Rivet/Projections/FastJets.hh"
namespace Rivet {
/// @brief MC validation analysis for Z + jets events
class MC_ZJETS : public MC_JetAnalysis {
public:
/// Default constructor
MC_ZJETS(string name = "MC_ZJETS")
: MC_JetAnalysis(name, 4, "Jets")
{ }
/// @name Analysis methods
//@{
/// Initialize
void init() {
_dR=0.2;
if (getOption("SCHEME") == "BARE") _dR = 0.0;
_lepton=PID::ELECTRON;
if (getOption("LMODE") == "MU") _lepton = PID::MUON;
FinalState fs;
Cut cut = Cuts::abseta < 3.5 && Cuts::pT > 25*GeV;
ZFinder zfinder(fs, cut, _lepton, 65*GeV, 115*GeV, _dR, ZFinder::ClusterPhotons::NODECAY, ZFinder::AddPhotons::YES);
declare(zfinder, "ZFinder");
FastJets jetpro(zfinder.remainingFinalState(), FastJets::ANTIKT, 0.4);
declare(jetpro, "Jets");
book(_h_Z_jet1_deta ,"Z_jet1_deta", 50, -5, 5);
book(_h_Z_jet1_dR ,"Z_jet1_dR", 25, 0.5, 7.0);
MC_JetAnalysis::init();
}
/// Do the analysis
void analyze(const Event & e) {
MSG_TRACE("MC_ZJETS: running ZFinder");
const ZFinder& zfinder = apply<ZFinder>(e, "ZFinder");
if (zfinder.bosons().size() != 1) vetoEvent;
const FourMomentum& zmom = zfinder.bosons()[0].momentum();
MSG_TRACE("MC_ZJETS: have exactly one Z boson candidate");
const Jets& jets = apply<FastJets>(e, "Jets").jetsByPt(_jetptcut);
if (jets.size() > 0) {
MSG_TRACE("MC_ZJETS: have at least one valid jet");
_h_Z_jet1_deta->fill(zmom.eta()-jets[0].eta());
_h_Z_jet1_dR->fill(deltaR(zmom, jets[0].momentum()));
}
MC_JetAnalysis::analyze(e);
}
/// Finalize
void finalize() {
scale(_h_Z_jet1_deta, crossSection()/picobarn/sumOfWeights());
scale(_h_Z_jet1_dR, crossSection()/picobarn/sumOfWeights());
MC_JetAnalysis::finalize();
}
//@}
protected:
/// @name Parameters for specialised e/mu and dressed/bare subclassing
//@{
double _dR;
PdgId _lepton;
//@}
private:
/// @name Histograms
//@{
Histo1DPtr _h_Z_jet1_deta;
Histo1DPtr _h_Z_jet1_dR;
//@}
};
// The hooks for the plugin system
RIVET_DECLARE_PLUGIN(MC_ZJETS);
}
|