[b443089] | 1 | /*
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| 2 | * Delphes: a framework for fast simulation of a generic collider experiment
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| 3 | * Copyright (C) 2012-2014 Universite catholique de Louvain (UCL), Belgium
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[1fa50c2] | 4 | *
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[b443089] | 5 | * This program is free software: you can redistribute it and/or modify
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| 6 | * it under the terms of the GNU General Public License as published by
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| 7 | * the Free Software Foundation, either version 3 of the License, or
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| 8 | * (at your option) any later version.
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[1fa50c2] | 9 | *
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[b443089] | 10 | * This program is distributed in the hope that it will be useful,
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | * GNU General Public License for more details.
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[1fa50c2] | 14 | *
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[b443089] | 15 | * You should have received a copy of the GNU General Public License
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| 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 17 | */
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| 18 |
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[d7d2da3] | 19 | /** \class StatusPidFilter
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| 20 | *
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| 21 | * Removes all generated particles except electrons, muons, taus,
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| 22 | * and particles with status == 3.
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| 23 | *
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| 24 | * \author J. Hirschauer - FNAL
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| 25 | *
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| 26 | */
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| 27 |
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| 28 | #include "modules/StatusPidFilter.h"
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| 29 |
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| 30 | #include "classes/DelphesClasses.h"
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| 31 | #include "classes/DelphesFactory.h"
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| 32 | #include "classes/DelphesFormula.h"
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| 33 |
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| 34 | #include "ExRootAnalysis/ExRootResult.h"
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| 35 | #include "ExRootAnalysis/ExRootFilter.h"
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| 36 | #include "ExRootAnalysis/ExRootClassifier.h"
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| 37 |
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| 38 | #include "TMath.h"
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| 39 | #include "TString.h"
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| 40 | #include "TFormula.h"
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| 41 | #include "TRandom3.h"
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| 42 | #include "TObjArray.h"
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| 43 | #include "TDatabasePDG.h"
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| 44 | #include "TLorentzVector.h"
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| 45 |
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| 46 | #include <algorithm>
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| 47 | #include <stdexcept>
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| 48 | #include <iostream>
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| 49 | #include <sstream>
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| 50 |
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| 51 | using namespace std;
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| 52 |
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[36b4099] | 53 | namespace {
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| 54 | // integer power (faster than TMath::Pow() + cast to integer)
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| 55 | int ipow(int base, int exp)
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| 56 | {
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| 57 | int result = 1;
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| 58 | while (exp)
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| 59 | {
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| 60 | if (exp & 1)
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| 61 | result *= base;
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| 62 | exp >>= 1;
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| 63 | base *= base;
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| 64 | }
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| 65 |
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| 66 | return result;
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| 67 | }
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| 68 |
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| 69 | // standalone function to extract the i-th digit from a number (counting from 0 = rightmost, etc..)
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| 70 | int digit(int val, int i)
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| 71 | {
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| 72 | int y = ipow(10,i);
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| 73 | int z = val/y;
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| 74 | int val2 = val / (y * 10);
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| 75 | return (z - val2*10);
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| 76 | }
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| 77 |
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| 78 | // return the first two digits if this is a "fundamental" particle
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| 79 | // ID = 100 is a special case (internal generator ID's are 81-100)
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| 80 | // also, 101 and 102 are now used (by HepPID) for geantinos
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| 81 | int fundamentalID(int pdgCode)
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| 82 | {
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| 83 | pdgCode = abs(pdgCode);
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| 84 | if( ( digit(pdgCode, 9) == 1 ) && ( digit(pdgCode, 8) == 0 ) ) { return 0; }
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| 85 | if( digit(pdgCode, 2) == 0 && digit(pdgCode, 3) == 0) {
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| 86 | return pdgCode%10000;
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| 87 | } else if( pdgCode <= 102 ) {
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| 88 | return pdgCode;
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| 89 | } else {
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| 90 | return 0;
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| 91 | }
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| 92 | }
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| 93 |
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| 94 | bool hasBottom(int pdgCode)
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| 95 | {
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| 96 | if ( (pdgCode/10000000) > 0)
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| 97 | return false;
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| 98 | if (pdgCode <= 100)
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| 99 | return false;
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| 100 | if (fundamentalID(pdgCode) <= 100 && fundamentalID(pdgCode) > 0)
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| 101 | return false;
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| 102 | if( digit(pdgCode, 3) == 5 || digit(pdgCode, 2) == 5 || digit(pdgCode, 1) == 5 )
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| 103 | return true;
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| 104 | return false;
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| 105 | }
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[010117a] | 106 |
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| 107 | bool isTauDaughter(int pdgCode, int M1, const TObjArray *fInputArray){
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| 108 | //not needed, just to speed up the code - can be further refined but gives only negligible improvement:
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| 109 | if ( pdgCode==15 || pdgCode<11 || (pdgCode > 22 && pdgCode < 100) || pdgCode>1000 )
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| 110 | return false;
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| 111 |
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| 112 | if ( M1 < 0 )
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| 113 | return false;
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| 114 |
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| 115 | Candidate *mother;
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| 116 | mother = static_cast<Candidate*>(fInputArray->At( M1 ));
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| 117 | if ( TMath::Abs(mother->PID) == 15 )
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| 118 | return true;
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| 119 |
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| 120 | return false;
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| 121 | }
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| 122 |
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[27738e8] | 123 | bool isWDaughter(int M1, const TObjArray *fInputArray)
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| 124 | {
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| 125 | if ( M1 < 0 ) return false;
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| 126 |
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| 127 | Candidate *mother;
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| 128 | mother = static_cast<Candidate*>(fInputArray->At( M1 ));
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| 129 | if ( TMath::Abs(mother->PID) == 24 ) return true;
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| 130 |
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| 131 | return false;
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| 132 | }
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| 133 |
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[36b4099] | 134 | }
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| 135 |
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| 136 |
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[d7d2da3] | 137 | //------------------------------------------------------------------------------
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| 138 |
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| 139 | StatusPidFilter::StatusPidFilter() :
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| 140 | fItInputArray(0)
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| 141 | {
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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 | StatusPidFilter::~StatusPidFilter()
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| 147 | {
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| 148 | }
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| 149 |
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| 150 | //------------------------------------------------------------------------------
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| 151 |
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| 152 | void StatusPidFilter::Init()
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| 153 | {
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| 154 | // PT threshold
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| 155 |
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| 156 | fPTMin = GetDouble("PTMin", 0.5);
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| 157 |
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| 158 | // import input array
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| 159 | fInputArray = ImportArray(GetString("InputArray", "Delphes/allParticles"));
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| 160 | fItInputArray = fInputArray->MakeIterator();
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| 161 |
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| 162 | // create output array
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| 163 |
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| 164 | fOutputArray = ExportArray(GetString("OutputArray", "filteredParticles"));
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| 165 | }
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| 166 |
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| 167 | //------------------------------------------------------------------------------
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| 168 |
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| 169 | void StatusPidFilter::Finish()
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| 170 | {
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| 171 | if(fItInputArray) delete fItInputArray;
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| 172 | }
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| 173 |
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| 174 | //------------------------------------------------------------------------------
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| 175 |
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| 176 | void StatusPidFilter::Process()
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| 177 | {
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| 178 | Candidate *candidate;
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| 179 | Int_t status, pdgCode;
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[41da326] | 180 | Bool_t pass;
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[d7d2da3] | 181 |
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| 182 | fItInputArray->Reset();
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| 183 | while((candidate = static_cast<Candidate*>(fItInputArray->Next())))
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| 184 | {
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| 185 | status = candidate->Status;
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| 186 | pdgCode = TMath::Abs(candidate->PID);
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| 187 |
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[41da326] | 188 | pass = kFALSE;
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[d7d2da3] | 189 |
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[cbc56c5] | 190 | // Store all SUSY particles
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| 191 | if(pdgCode >= 1000001 && pdgCode <= 1000039) pass = kTRUE;
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| 192 |
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[868daac] | 193 | // hard scattering particles (first condition for Py6, second for Py8)
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[a0f2226] | 194 | if(status == 3) pass = kTRUE;
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| 195 | if(status > 20 && status < 30 ) pass = kTRUE;
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[41da326] | 196 |
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[d5104a4] | 197 | // electrons, muons, taus and neutrinos
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| 198 | if(pdgCode > 10 && pdgCode < 17) pass = kTRUE;
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[41da326] | 199 |
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| 200 | // heavy quarks
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[868daac] | 201 | if(pdgCode == 4 ||pdgCode == 5 || pdgCode == 6) pass = kTRUE;
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[41da326] | 202 |
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| 203 | // Gauge bosons and other fundamental bosons
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[d5104a4] | 204 | if(pdgCode > 22 && pdgCode < 43) pass = kTRUE;
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[41da326] | 205 |
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[f3598d0] | 206 | //Stable photons
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| 207 | if(pdgCode == 22 && status==1) pass = kTRUE;
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| 208 |
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[36b4099] | 209 | // logic ported from HepPDF: http://lcgapp.cern.ch/project/simu/HepPDT/HepPDT.2.05.02/html/ParticleID_8cc-source.html#l00081
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| 210 | bool is_b_hadron = hasBottom(pdgCode);
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[9c980d2] | 211 | bool is_b_quark = (pdgCode == 5);
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[36b4099] | 212 |
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[010117a] | 213 | bool is_tau_daughter = isTauDaughter(pdgCode, candidate->M1, fInputArray);
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| 214 |
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[36b4099] | 215 | if (is_b_hadron)
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| 216 | pass = kTRUE;
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| 217 |
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[010117a] | 218 | if (is_tau_daughter)
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| 219 | pass = kTRUE;
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| 220 |
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[27738e8] | 221 | bool is_W_daughter = isWDaughter(candidate->M1, fInputArray);
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| 222 | if (is_W_daughter)
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| 223 | pass = kTRUE;
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| 224 |
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[9c980d2] | 225 | // fPTMin not applied to b_hadrons / b_quarks to allow for b-enriched sample stitching
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[010117a] | 226 | // fPTMin not applied to tau decay products to allow visible-tau four momentum determination
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[27738e8] | 227 | if(!pass || (candidate->Momentum.Pt() < fPTMin && !(is_b_hadron || is_b_quark || is_tau_daughter || is_W_daughter)) ) continue;
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[d7d2da3] | 228 |
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| 229 | fOutputArray->Add(candidate);
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| 230 | }
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| 231 | }
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| 232 |
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