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00045 #include "fastjet/PseudoJet.hh"
00046 #include "fastjet/ClusterSequenceArea.hh"
00047 #include "fastjet/ClusterSequencePassiveArea.hh"
00048
00049
00050 #include "fastjet/config.h"
00051
00052 #ifdef ENABLE_PLUGIN_SISCONE
00053 #include "fastjet/SISConePlugin.hh"
00054 #endif
00055
00056 #include<iostream>
00057 #include<sstream>
00058 #include<vector>
00059
00060 using namespace std;
00061
00062
00063 void print_jets (const fastjet::ClusterSequenceAreaBase &,
00064 const vector<fastjet::PseudoJet> &);
00065
00067 int main (int argc, char ** argv) {
00068
00069 vector<fastjet::PseudoJet> input_particles;
00070
00071
00072 double px, py , pz, E;
00073 while (cin >> px >> py >> pz >> E) {
00074
00075
00076 input_particles.push_back(fastjet::PseudoJet(px,py,pz,E));
00077 }
00078
00079
00080
00081 double Rparam = 1.0;
00082 fastjet::Strategy strategy = fastjet::Best;
00083 fastjet::JetDefinition jet_def(fastjet::kt_algorithm, Rparam, strategy);
00084
00085
00086
00087
00088
00089 fastjet::AreaDefinition area_def;
00090 bool use_voronoi = false;
00091 if (!use_voronoi) {
00092 double ghost_etamax = 7.0;
00093 double ghost_area = 0.05;
00094 int active_area_repeats = 1;
00095
00096
00097
00098
00099
00100
00101
00102
00103 fastjet::GhostedAreaSpec ghost_spec(ghost_etamax, active_area_repeats,
00104 ghost_area);
00105 area_def = fastjet::AreaDefinition(fastjet::passive_area,ghost_spec);
00106 } else {
00107 double effective_Rfact = 1.0;
00108 area_def = fastjet::VoronoiAreaSpec(effective_Rfact);
00109 }
00110
00111
00112 fastjet::ClusterSequenceArea clust_seq(input_particles,
00113 jet_def, area_def);
00114
00115
00116
00117
00118
00119
00120
00121
00122
00123
00124
00125 cout << "Jet definition was: " << jet_def.description() << endl;
00126 cout << "Area definition was: " << area_def.description() << endl;
00127 cout << "Strategy adopted by FastJet was "<<
00128 clust_seq.strategy_string()<<endl<<endl;
00129
00130
00131 double ptmin = 5.0;
00132 vector<fastjet::PseudoJet> inclusive_jets = clust_seq.inclusive_jets(ptmin);
00133
00134
00135 cout << "Printing inclusive jets with pt > "<< ptmin<<" GeV\n";
00136 cout << "---------------------------------------\n";
00137 print_jets(clust_seq, inclusive_jets);
00138 cout << endl;
00139
00140
00141 cout << "Number of unclustered particles: "
00142 << clust_seq.unclustered_particles().size() << endl;
00143
00144
00145 }
00146
00147
00148
00150 void print_jets (const fastjet::ClusterSequenceAreaBase & clust_seq,
00151 const vector<fastjet::PseudoJet> & unsorted_jets) {
00152
00153
00154 vector<fastjet::PseudoJet> jets = sorted_by_pt(unsorted_jets);
00155
00156 printf(" ijet rap phi Pt area +- err\n");
00157 for (size_t j = 0; j < jets.size(); j++) {
00158
00159 double area = clust_seq.area(jets[j]);
00160 double area_error = clust_seq.area_error(jets[j]);
00161
00162 printf("%5u %9.5f %8.5f %10.3f %8.3f +- %6.3f\n",j,jets[j].rap(),
00163 jets[j].phi(),jets[j].perp(), area, area_error);
00164 }
00165
00166
00167 }
00168
00169
00170
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00174