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0001 //FJSTARTHEADER 0002 // $Id: CMSIterativeConePlugin.hh 1508 2009-04-10 22:46:49Z soyez $ 0003 // 0004 // Copyright (c) 2007-2021, Matteo Cacciari, Gavin P. Salam and Gregory Soyez 0005 // 0006 //---------------------------------------------------------------------- 0007 // This file is part of FastJet. 0008 // 0009 // FastJet is free software; you can redistribute it and/or modify 0010 // it under the terms of the GNU General Public License as published by 0011 // the Free Software Foundation; either version 2 of the License, or 0012 // (at your option) any later version. 0013 // 0014 // The algorithms that underlie FastJet have required considerable 0015 // development. They are described in the original FastJet paper, 0016 // hep-ph/0512210 and in the manual, arXiv:1111.6097. If you use 0017 // FastJet as part of work towards a scientific publication, please 0018 // quote the version you use and include a citation to the manual and 0019 // optionally also to hep-ph/0512210. 0020 // 0021 // FastJet is distributed in the hope that it will be useful, 0022 // but WITHOUT ANY WARRANTY; without even the implied warranty of 0023 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 0024 // GNU General Public License for more details. 0025 // 0026 // You should have received a copy of the GNU General Public License 0027 // along with FastJet. If not, see <http://www.gnu.org/licenses/>. 0028 //---------------------------------------------------------------------- 0029 //FJENDHEADER 0030 0031 #ifndef __CMSITERATIVECONEPLUGIN_HH__ 0032 #define __CMSITERATIVECONEPLUGIN_HH__ 0033 0034 #include "fastjet/JetDefinition.hh" 0035 #include "fastjet/internal/thread_safety_helpers.hh" // helpers to write transparent code w&wo C++11 features 0036 0037 // questionable whether this should be in fastjet namespace or not... 0038 FASTJET_BEGIN_NAMESPACE // defined in fastjet/internal/base.hh 0039 0040 // forward declaration to reduce includes 0041 class PseudoJet; 0042 0043 //---------------------------------------------------------------------- 0044 // 0045 0046 /// @ingroup plugins 0047 /// \class CMSIterativeConePlugin 0048 /// Implementation of the CMS Iterative Cone (plugin for fastjet v2.4 upwards) 0049 class CMSIterativeConePlugin : public JetDefinition::Plugin { 0050 public: 0051 /// Main constructor for the CMSIterativeCone Plugin class. 0052 /// 0053 /// The arguments are 0054 /// ConeRadius the radius of the cone 0055 /// SeedThreshold a threshold for the seeds to iterate from 0056 /// 0057 /// NOTE: to be more coherent with all other fastjet plugins, 0058 /// we've put the radius before the seed threshold. 0059 /// CMS does the opposite. 0060 /// In this way, we also put a default value of 0 for the 0061 /// seed threshold. 0062 CMSIterativeConePlugin (double ConeRadius, double SeedThreshold=1.0) : 0063 theConeRadius(ConeRadius), theSeedThreshold(SeedThreshold){} 0064 0065 /// copy constructor 0066 CMSIterativeConePlugin (const CMSIterativeConePlugin & plugin) { 0067 *this = plugin; 0068 } 0069 0070 // the things that are required by base class 0071 virtual std::string description () const; 0072 virtual void run_clustering(ClusterSequence &) const; 0073 0074 /// the plugin mechanism's standard way of accessing the jet radius 0075 /// here we return the R of the last alg in the list 0076 virtual double R() const {return theConeRadius;} 0077 0078 /// get the seed threshold 0079 virtual double seed_threshold() const {return theSeedThreshold;} 0080 0081 private: 0082 double theConeRadius; ///< cone radius 0083 double theSeedThreshold; ///< seed threshold 0084 0085 static thread_safety_helpers::FirstTimeTrue _first_time; 0086 0087 /// print a banner for reference to the 3rd-party code 0088 void _print_banner(std::ostream *ostr) const; 0089 }; 0090 0091 FASTJET_END_NAMESPACE // defined in fastjet/internal/base.hh 0092 0093 #endif // __CMSITERATIVECONEPLUGIN_HH__ 0094
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