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D0RunIBaseConePlugin.cc
//FJSTARTHEADER
// $Id: D0RunIBaseConePlugin.cc 1779 2010-10-25 10:32:59Z soyez $
//
// Copyright (c) 2009-2021, Matteo Cacciari, Gavin P. Salam and Gregory Soyez
//
//----------------------------------------------------------------------
// This file is part of FastJet.
//
// FastJet is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// The algorithms that underlie FastJet have required considerable
// development. They are described in the original FastJet paper,
// hep-ph/0512210 and in the manual, arXiv:1111.6097. If you use
// FastJet as part of work towards a scientific publication, please
// quote the version you use and include a citation to the manual and
// optionally also to hep-ph/0512210.
//
// FastJet is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with FastJet. If not, see <http://www.gnu.org/licenses/>.
//----------------------------------------------------------------------
//FJENDHEADER
// D0 stuff
// apparently this has to go first to avoid a problem with gcc-4.0.1 builds on Macs
#include <list>
#include "ConeClusterAlgo.hpp"
#include "HepEntityIpre96.h"
#include "HepEntityI.h"
#include "fastjet/D0RunIBaseConePlugin.hh"
#include "fastjet/D0RunIpre96ConePlugin.hh"
#include "fastjet/D0RunIConePlugin.hh"
#include "fastjet/ClusterSequence.hh"
#include "fastjet/Error.hh"
#include <sstream>
FASTJET_BEGIN_NAMESPACE // defined in fastjet/internal/base.hh
using namespace std;
using namespace d0runi;
/////////////////////////////////////////////
// //
// D0RunIBaseConePlugin implementation //
// //
/////////////////////////////////////////////
const double D0RunIBaseConePlugin::_DEFAULT_SPLifr = 0.5; //shared Et fraction threshold
const double D0RunIBaseConePlugin::_DEFAULT_TWOrad = 0.;
const bool D0RunIBaseConePlugin::_DEFAULT_D0_Angle = false;
const bool D0RunIBaseConePlugin::_DEFAULT_Increase_Delta_R = true;
const bool D0RunIBaseConePlugin::_DEFAULT_Kill_Far_Clusters = true;
const bool D0RunIBaseConePlugin::_DEFAULT_Jet_Et_Min_On_Iter = true;
const double D0RunIBaseConePlugin::_DEFAULT_Far_Ratio = 0.5;
const double D0RunIBaseConePlugin::_DEFAULT_Eitem_Negdrop = -1.0;
const double D0RunIBaseConePlugin::_DEFAULT_Et_Min_Ratio = 0.5;
const double D0RunIBaseConePlugin::_DEFAULT_Thresh_Diff_Et = 0.01;
// for the real work, we write a template class that decides which
// HepEntity type to use
template<typename HepEntityType>
void D0RunIBaseConePlugin::run_clustering_worker(ClusterSequence & clust_seq) const{
// create the entities needed by the D0 code
vector<HepEntityType> entities(clust_seq.jets().size());
list<const HepEntityType * > ensemble;
for (unsigned i = 0; i < clust_seq.jets().size(); i++) {
entities[i].Fill(clust_seq.jets()[i].E(),
clust_seq.jets()[i].px(),
clust_seq.jets()[i].py(),
clust_seq.jets()[i].pz(),
i);
// use only the particles that do not have infinite rapidity
if (abs(entities[i].pz() ) < entities[i].E() ) {
ensemble.push_back(& (entities[i]));
}
}
// prepare the D0 algorithm
ConeClusterAlgo<HepEntityType>
RunIconeAlgo(CONErad(),
JETmne(),
TWOrad(),
SPLifr(),
D0_Angle(),
Increase_Delta_R(),
Kill_Far_Clusters(),
Jet_Et_Min_On_Iter(),
Far_Ratio(),
Eitem_Negdrop(),
Et_Min_Ratio(),
Thresh_Diff_Et());
// run the algorithm
float Zvertex = 0.;
list<HepEntityType> jets;
RunIconeAlgo.makeClusters(jets, ensemble, Zvertex);
// now transfer the information about the jets into the
// FastJet structure
for(int i = RunIconeAlgo.TempColl.size()-1; i >= 0; i--) {
std::list<const HepEntityType*> tlist = RunIconeAlgo.TempColl[i].LItems();
typename std::list<const HepEntityType*>::iterator tk;
// get first particle in list
tk = tlist.begin();
int jet_k = (*tk)->index;
// GS addition: in order to use the proper recombination scheme
// used by D0 we need to keep track of the sum as a
// "HepEntityType"
HepEntityType jet_current_momentum = *(*tk);
// now merge with remaining particles in list
tk++;
for (; tk != tlist.end(); tk++) {
int jet_i = jet_k;
int jet_j = (*tk)->index;
// do a fake recombination step with dij=0
double dij = 0.0;
// GS addition: find the new momentum and convert that into a
// pseudo-jet
jet_current_momentum.Add(**tk);
PseudoJet new_mom(jet_current_momentum.px(), jet_current_momentum.py(),
jet_current_momentum.pz(), jet_current_momentum.E());
clust_seq.plugin_record_ij_recombination(jet_i, jet_j, dij, new_mom, jet_k);
}
// NB: put a sensible looking d_iB just to be nice...
double d_iB = clust_seq.jets()[jet_k].perp2();
clust_seq.plugin_record_iB_recombination(jet_k, d_iB);
}
}
/////////////////////////////////////////////
// //
// D0RunIpre96ConePlugin implementation //
// //
/////////////////////////////////////////////
thread_safety_helpers::FirstTimeTrue D0RunIpre96ConePlugin::_first_time;
string D0RunIpre96ConePlugin::description () const {
ostringstream desc;
desc << "D0 Run I (pre 96) cone jet algorithm, with ";
desc << "cone_radius = " << CONErad () << ", "
<< "min_jet_Et = " << JETmne () << ", "
<< "split_fraction = " << SPLifr ();
return desc.str();
}
void D0RunIpre96ConePlugin::run_clustering(ClusterSequence & clust_seq) const {
// print a banner if we run this for the first time
_print_banner(clust_seq.fastjet_banner_stream());
run_clustering_worker<HepEntityIpre96>(clust_seq);
}
// print a banner for reference to the 3rd-party code
void D0RunIpre96ConePlugin::_print_banner(ostream *ostr) const{
if (! _first_time()) return;
// make sure the user has not set the banner stream to NULL
if (!ostr) return;
(*ostr) << "#--------------------------------------------------------------------------" << endl;
(*ostr) << "# You are running the D0 Run I (pre96) Cone plugin for FastJet " << endl;
(*ostr) << "# Original code by the D0 collaboration, provided by Lars Sonnenschein; " << endl;
(*ostr) << "# interface by FastJet authors " << endl;
(*ostr) << "# If you use this plugin, please cite " << endl;
(*ostr) << "# B. Abbott et al. [D0 Collaboration], FERMILAB-PUB-97-242-E. " << endl;
(*ostr) << "# in addition to the usual FastJet reference. " << endl;
(*ostr) << "#--------------------------------------------------------------------------" << endl;
// make sure we really have the output done.
ostr->flush();
}
/////////////////////////////////////////////
// //
// D0RunIConePlugin implementation //
// //
/////////////////////////////////////////////
thread_safety_helpers::FirstTimeTrue D0RunIConePlugin::_first_time;
string D0RunIConePlugin::description () const {
ostringstream desc;
desc << "D0 Run I cone jet algorithm, with ";
desc << "cone_radius = " << CONErad () << ", "
<< "min_jet_Et = " << JETmne () << ", "
<< "split_fraction = " << SPLifr ();
return desc.str();
}
void D0RunIConePlugin::run_clustering(ClusterSequence & clust_seq) const {
// print a banner if we run this for the first time
_print_banner(clust_seq.fastjet_banner_stream());
run_clustering_worker<HepEntityI>(clust_seq);
}
// print a banner for reference to the 3rd-party code
void D0RunIConePlugin::_print_banner(ostream *ostr) const{
if (! _first_time()) return;
// make sure the user has not set the banner stream to NULL
if (!ostr) return;
(*ostr) << "#--------------------------------------------------------------------------" << endl;
(*ostr) << "# You are running the D0 Run I Cone plugin for FastJet " << endl;
(*ostr) << "# Original code provided by Lars Sonnenschein; interface by FastJet authors" << endl;
(*ostr) << "# If you use this plugin, please cite " << endl;
(*ostr) << "# B. Abbott et al. [D0 Collaboration], FERMILAB-PUB-97-242-E. " << endl;
(*ostr) << "# in addition to the usual FastJet reference. " << endl;
(*ostr) << "#--------------------------------------------------------------------------" << endl;
// make sure we really have the output done.
ostr->flush();
}
FASTJET_END_NAMESPACE // defined in fastjet/internal/base.hh
fastjet::ClusterSequence
deals with clustering
Definition ClusterSequence.hh:63
fastjet::ClusterSequence::fastjet_banner_stream
static std::ostream * fastjet_banner_stream()
returns a pointer to the stream to be used to print banners (cout by default).
Definition ClusterSequence.hh:579
fastjet::D0RunIConePlugin::run_clustering
virtual void run_clustering(ClusterSequence &) const
given a ClusterSequence that has been filled up with initial particles, the following function should...
Definition D0RunIBaseConePlugin.cc:214
fastjet::D0RunIConePlugin::description
virtual std::string description() const
return a textual description of the jet-definition implemented in this plugin
Definition D0RunIBaseConePlugin.cc:203
fastjet::D0RunIpre96ConePlugin::run_clustering
virtual void run_clustering(ClusterSequence &) const
given a ClusterSequence that has been filled up with initial particles, the following function should...
Definition D0RunIBaseConePlugin.cc:167
fastjet::D0RunIpre96ConePlugin::description
virtual std::string description() const
return a textual description of the jet-definition implemented in this plugin
Definition D0RunIBaseConePlugin.cc:156