| 1 | //STARTHEADER
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| 2 | // $Id$
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| 3 | //
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| 4 | // Copyright (c) 2009-2011, Matteo Cacciari, Gavin P. Salam and Gregory Soyez
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| 5 | //
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| 6 | //----------------------------------------------------------------------
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| 7 | // This file is part of FastJet.
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| 8 | //
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| 9 | // FastJet is free software; you can redistribute it and/or modify
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| 10 | // it under the terms of the GNU General Public License as published by
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| 11 | // the Free Software Foundation; either version 2 of the License, or
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| 12 | // (at your option) any later version.
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| 13 | //
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| 14 | // The algorithms that underlie FastJet have required considerable
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| 15 | // development and are described in hep-ph/0512210. If you use
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| 16 | // FastJet as part of work towards a scientific publication, please
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| 17 | // include a citation to the FastJet paper.
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| 18 | //
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| 19 | // FastJet is distributed in the hope that it will be useful,
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| 20 | // but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 21 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 22 | // GNU General Public License for more details.
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| 23 | //
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| 24 | // You should have received a copy of the GNU General Public License
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| 25 | // along with FastJet. If not, see <http://www.gnu.org/licenses/>.
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| 26 | //----------------------------------------------------------------------
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| 27 | //ENDHEADER
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| 28 |
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| 29 | // D0 stuff
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| 30 | // apparently this has to go first to avoid a problem with gcc-4.0.1 builds on Macs
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| 31 | #include <list>
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| 32 | #include "ConeClusterAlgo.hpp"
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| 33 | #include "HepEntityIpre96.h"
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| 34 | #include "HepEntityI.h"
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| 35 |
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| 36 | #include "fastjet/D0RunIBaseConePlugin.hh"
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| 37 | #include "fastjet/D0RunIpre96ConePlugin.hh"
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| 38 | #include "fastjet/D0RunIConePlugin.hh"
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| 39 | #include "fastjet/ClusterSequence.hh"
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| 40 | #include "fastjet/Error.hh"
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| 41 | #include <sstream>
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| 42 |
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| 43 | FASTJET_BEGIN_NAMESPACE // defined in fastjet/internal/base.hh
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| 44 |
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| 45 | using namespace std;
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| 46 | using namespace d0runi;
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| 47 |
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| 48 | /////////////////////////////////////////////
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| 49 | // //
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| 50 | // D0RunIBaseConePlugin implementation //
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| 51 | // //
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| 52 | /////////////////////////////////////////////
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| 53 |
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| 54 | const double D0RunIBaseConePlugin::_DEFAULT_SPLifr = 0.5; //shared Et fraction threshold
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| 55 | const double D0RunIBaseConePlugin::_DEFAULT_TWOrad = 0.;
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| 56 | const bool D0RunIBaseConePlugin::_DEFAULT_D0_Angle = false;
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| 57 | const bool D0RunIBaseConePlugin::_DEFAULT_Increase_Delta_R = true;
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| 58 | const bool D0RunIBaseConePlugin::_DEFAULT_Kill_Far_Clusters = true;
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| 59 | const bool D0RunIBaseConePlugin::_DEFAULT_Jet_Et_Min_On_Iter = true;
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| 60 | const double D0RunIBaseConePlugin::_DEFAULT_Far_Ratio = 0.5;
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| 61 | const double D0RunIBaseConePlugin::_DEFAULT_Eitem_Negdrop = -1.0;
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| 62 | const double D0RunIBaseConePlugin::_DEFAULT_Et_Min_Ratio = 0.5;
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| 63 | const double D0RunIBaseConePlugin::_DEFAULT_Thresh_Diff_Et = 0.01;
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| 64 |
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| 65 |
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| 66 | // for the real work, we write a template class that decides which
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| 67 | // HepEntity type to use
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| 68 | template<typename HepEntityType>
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| 69 | void D0RunIBaseConePlugin::run_clustering_worker(ClusterSequence & clust_seq) const{
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| 70 | // create the entities needed by the D0 code
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| 71 | vector<HepEntityType> entities(clust_seq.jets().size());
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| 72 | list<const HepEntityType * > ensemble;
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| 73 | for (unsigned i = 0; i < clust_seq.jets().size(); i++) {
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| 74 | entities[i].Fill(clust_seq.jets()[i].E(),
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| 75 | clust_seq.jets()[i].px(),
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| 76 | clust_seq.jets()[i].py(),
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| 77 | clust_seq.jets()[i].pz(),
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| 78 | i);
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| 79 | // use only the particles that do not have infinite rapidity
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| 80 | if (abs(entities[i].pz() ) < entities[i].E() ) {
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| 81 | ensemble.push_back(& (entities[i]));
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| 82 | }
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| 83 | }
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| 84 |
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| 85 | // prepare the D0 algorithm
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| 86 | ConeClusterAlgo<HepEntityType>
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| 87 | RunIconeAlgo(CONErad(),
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| 88 | JETmne(),
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| 89 | TWOrad(),
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| 90 | SPLifr(),
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| 91 | D0_Angle(),
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| 92 | Increase_Delta_R(),
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| 93 | Kill_Far_Clusters(),
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| 94 | Jet_Et_Min_On_Iter(),
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| 95 | Far_Ratio(),
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| 96 | Eitem_Negdrop(),
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| 97 | Et_Min_Ratio(),
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| 98 | Thresh_Diff_Et());
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| 99 |
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| 100 |
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| 101 | // run the algorithm
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| 102 | float Zvertex = 0.;
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| 103 | list<HepEntityType> jets;
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| 104 | RunIconeAlgo.makeClusters(jets, ensemble, Zvertex);
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| 105 |
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| 106 | // now transfer the information about the jets into the
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| 107 | // FastJet structure
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| 108 | for(int i = RunIconeAlgo.TempColl.size()-1; i >= 0; i--) {
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| 109 |
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| 110 | std::list<const HepEntityType*> tlist = RunIconeAlgo.TempColl[i].LItems();
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| 111 | typename std::list<const HepEntityType*>::iterator tk;
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| 112 |
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| 113 | // get first particle in list
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| 114 | tk = tlist.begin();
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| 115 | int jet_k = (*tk)->index;
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| 116 |
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| 117 | // GS addition: in order to use the proper recombination scheme
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| 118 | // used by D0 we need to keep track of the sum as a
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| 119 | // "HepEntityType"
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| 120 | HepEntityType jet_current_momentum = *(*tk);
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| 121 |
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| 122 | // now merge with remaining particles in list
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| 123 | tk++;
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| 124 | for (; tk != tlist.end(); tk++) {
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| 125 | int jet_i = jet_k;
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| 126 | int jet_j = (*tk)->index;
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| 127 | // do a fake recombination step with dij=0
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| 128 | double dij = 0.0;
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| 129 |
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| 130 | // GS addition: find the new momentum and convert that into a
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| 131 | // pseudo-jet
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| 132 | jet_current_momentum.Add(**tk);
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| 133 | PseudoJet new_mom(jet_current_momentum.px(), jet_current_momentum.py(),
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| 134 | jet_current_momentum.pz(), jet_current_momentum.E());
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| 135 |
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| 136 | clust_seq.plugin_record_ij_recombination(jet_i, jet_j, dij, new_mom, jet_k);
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| 137 | }
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| 138 |
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| 139 | // NB: put a sensible looking d_iB just to be nice...
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| 140 | double d_iB = clust_seq.jets()[jet_k].perp2();
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| 141 | clust_seq.plugin_record_iB_recombination(jet_k, d_iB);
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| 142 | }
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| 143 | }
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| 144 |
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| 145 |
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| 146 | /////////////////////////////////////////////
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| 147 | // //
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| 148 | // D0RunIpre96ConePlugin implementation //
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| 149 | // //
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| 150 | /////////////////////////////////////////////
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| 151 |
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| 152 | bool D0RunIpre96ConePlugin::_first_time=true;
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| 153 |
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| 154 | string D0RunIpre96ConePlugin::description () const {
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| 155 | ostringstream desc;
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| 156 |
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| 157 | desc << "D0 Run I (pre 96) cone jet algorithm, with ";
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| 158 | desc << "cone_radius = " << CONErad () << ", "
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| 159 | << "min_jet_Et = " << JETmne () << ", "
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| 160 | << "split_fraction = " << SPLifr ();
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| 161 |
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| 162 | return desc.str();
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| 163 | }
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| 164 |
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| 165 | void D0RunIpre96ConePlugin::run_clustering(ClusterSequence & clust_seq) const {
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| 166 | // print a banner if we run this for the first time
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| 167 | _print_banner(clust_seq.fastjet_banner_stream());
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| 168 |
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| 169 | run_clustering_worker<HepEntityIpre96>(clust_seq);
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| 170 | }
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| 171 |
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| 172 | // print a banner for reference to the 3rd-party code
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| 173 | void D0RunIpre96ConePlugin::_print_banner(ostream *ostr) const{
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| 174 | if (! _first_time) return;
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| 175 | _first_time=false;
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| 176 |
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| 177 | // make sure the user has not set the banner stream to NULL
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| 178 | if (!ostr) return;
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| 179 |
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| 180 | (*ostr) << "#--------------------------------------------------------------------------" << endl;
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| 181 | (*ostr) << "# You are running the D0 Run I (pre96) Cone plugin for FastJet " << endl;
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| 182 | (*ostr) << "# Original code by the D0 collaboration, provided by Lars Sonnenschein; " << endl;
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| 183 | (*ostr) << "# interface by FastJet authors " << endl;
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| 184 | (*ostr) << "# If you use this plugin, please cite " << endl;
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| 185 | (*ostr) << "# B. Abbott et al. [D0 Collaboration], FERMILAB-PUB-97-242-E. " << endl;
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| 186 | (*ostr) << "# in addition to the usual FastJet reference. " << endl;
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| 187 | (*ostr) << "#--------------------------------------------------------------------------" << endl;
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| 188 |
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| 189 | // make sure we really have the output done.
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| 190 | ostr->flush();
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| 191 | }
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| 192 |
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| 193 |
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| 194 | /////////////////////////////////////////////
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| 195 | // //
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| 196 | // D0RunIConePlugin implementation //
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| 197 | // //
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| 198 | /////////////////////////////////////////////
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| 199 |
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| 200 | bool D0RunIConePlugin::_first_time=true;
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| 201 |
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| 202 | string D0RunIConePlugin::description () const {
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| 203 | ostringstream desc;
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| 204 |
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| 205 | desc << "D0 Run I cone jet algorithm, with ";
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| 206 | desc << "cone_radius = " << CONErad () << ", "
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| 207 | << "min_jet_Et = " << JETmne () << ", "
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| 208 | << "split_fraction = " << SPLifr ();
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| 209 |
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| 210 | return desc.str();
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| 211 | }
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| 212 |
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| 213 | void D0RunIConePlugin::run_clustering(ClusterSequence & clust_seq) const {
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| 214 | // print a banner if we run this for the first time
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| 215 | _print_banner(clust_seq.fastjet_banner_stream());
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| 216 |
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| 217 | run_clustering_worker<HepEntityI>(clust_seq);
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| 218 | }
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| 219 |
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| 220 | // print a banner for reference to the 3rd-party code
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| 221 | void D0RunIConePlugin::_print_banner(ostream *ostr) const{
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| 222 | if (! _first_time) return;
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| 223 | _first_time=false;
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| 224 |
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| 225 | // make sure the user has not set the banner stream to NULL
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| 226 | if (!ostr) return;
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| 227 |
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| 228 | (*ostr) << "#--------------------------------------------------------------------------" << endl;
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| 229 | (*ostr) << "# You are running the D0 Run I Cone plugin for FastJet " << endl;
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| 230 | (*ostr) << "# Original code provided by Lars Sonnenschein; interface by FastJet authors" << endl;
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| 231 | (*ostr) << "# If you use this plugin, please cite " << endl;
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| 232 | (*ostr) << "# B. Abbott et al. [D0 Collaboration], FERMILAB-PUB-97-242-E. " << endl;
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| 233 | (*ostr) << "# in addition to the usual FastJet reference. " << endl;
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| 234 | (*ostr) << "#--------------------------------------------------------------------------" << endl;
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| 235 |
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| 236 | // make sure we really have the output done.
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| 237 | ostr->flush();
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| 238 | }
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| 239 |
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| 240 |
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| 241 |
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| 242 | FASTJET_END_NAMESPACE // defined in fastjet/internal/base.hh
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