LHCB_2012_I1119400.cc

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// -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/ChargedFinalState.hh"
#include "Rivet/Math/MathUtils.hh"
#include "Rivet/Math/Constants.hh"

#include "HepMC/GenEvent.h"
#include "HepMC/GenParticle.h"
#include "HepMC/GenVertex.h"
#include "HepMC/SimpleVector.h"

#include <iostream>
#include <sstream>
#include <string>
#include <vector>
#include <map>
#include <utility>

namespace Rivet {


  class LHCB_2012_I1119400 : public Analysis {
    public:

    /// @name Constructors etc.
    //@{

    /// Constructor
    LHCB_2012_I1119400() : Analysis("LHCB_2012_I1119400"),
      _p_min(5.0),
      _pt_min(0.0),_pt1_edge(0.8), _pt2_edge(1.2),
      _eta_nbins(4),
      _eta_min(2.5),
      _eta_max(4.5)
    {   }

    //@}


    public:

    /// @name Analysis methods
    //@{

    /// Book histograms and initialise projections before the run
    void init() {
      fillMap(_partLftMap);

      int id_shift = 0;
      if (fuzzyEquals(sqrtS(), 7*TeV)) id_shift = 1;
      // define ratios if second pdgid in pair is -1, it means that is a antiparticle/particle ratio

      _ratiotype["pbarp"]         = make_pair(2212, -1);
      _ratiotype["kminuskplus"]   = make_pair(321, -1);
      _ratiotype["piminuspiplus"] = make_pair(211, -1);
      _ratiotype["ppi"]           = make_pair(2212, 211);
      _ratiotype["kpi"]           = make_pair(321, 211);
      _ratiotype["pk"]            = make_pair(2212, 321);

      std::map<string, int > _hepdataid;
      _hepdataid["pbarp"]         =  1 + id_shift;
      _hepdataid["kminuskplus"]   =  3 + id_shift;
      _hepdataid["piminuspiplus"] =  5 + id_shift;
      _hepdataid["ppi"]           =  7 + id_shift;
      _hepdataid["kpi"]           =  9 + id_shift;
      _hepdataid["pk"]            = 11 + id_shift;

      std::map<std::string, std::pair<int, int> >::iterator it;

      // booking histograms
      for (it=_ratiotype.begin(); it!=_ratiotype.end(); it++) {
        _h_ratio_lowpt [it->first] = bookScatter2D(_hepdataid[it->first], 1, 1);
        _h_ratio_midpt [it->first] = bookScatter2D(_hepdataid[it->first], 1, 2);
        _h_ratio_highpt[it->first] = bookScatter2D(_hepdataid[it->first], 1, 3);
        _h_num_lowpt   [it->first] = bookHisto1D  (_hepdataid[it->first], 1, 1, "num_l_"+it->first);
        _h_num_midpt   [it->first] = bookHisto1D  (_hepdataid[it->first], 1, 2, "num_m_"+it->first);
        _h_num_highpt  [it->first] = bookHisto1D  (_hepdataid[it->first], 1, 3, "num_h_"+it->first);
        _h_den_lowpt   [it->first] = bookHisto1D  (_hepdataid[it->first], 1, 1, "den_l_"+it->first);
        _h_den_midpt   [it->first] = bookHisto1D  (_hepdataid[it->first], 1, 2, "den_m_"+it->first);
        _h_den_highpt  [it->first] = bookHisto1D  (_hepdataid[it->first], 1, 3, "den_h_"+it->first);
      }

      addProjection(ChargedFinalState(_eta_min, _eta_max, _pt_min*GeV), "CFS");
    }


    // Perform the per-event analysis
    void analyze(const Event& event) {
      const double weight = event.weight();
      const ChargedFinalState& cfs = applyProjection<ChargedFinalState>(event, "CFS");

      foreach (const Particle& p, cfs.particles()) {
        int id = p.pdgId();
        // continue if particle not a proton, a kaon or a pion
        if ( !( (abs(id) == 211) || (abs(id) == 321) || (abs(id) == 2212)))  {
          continue;
        }

        // cut in momentum
        const FourMomentum& qmom = p.momentum();
        if (qmom.p().mod() < _p_min) continue;

        // Lifetime cut: ctau sum of all particle ancestors < 10^-9 m according to the paper (see eq. 5)
        const double MAX_CTAU = 1.0e-9; // [m]
        double ancestor_lftsum = getMotherLifeTimeSum(p);
        if ( (ancestor_lftsum < 0.0) || (ancestor_lftsum > MAX_CTAU) ) continue;

        double eta = qmom.eta();
        double pT  = qmom.pT();

        std::map<std::string, std::pair<int, int> >::iterator it;

        for (it=_ratiotype.begin(); it!=_ratiotype.end(); it++) {
          // check what type of ratio is
          if ((it->second.second)==-1) {
            // check ptbin
            if (pT < _pt1_edge) {
              // filling histos for numerator and denominator
              if (id == -abs(it->second.first)) _h_num_lowpt[it->first]->fill(eta, weight);
              if (id ==  abs(it->second.first)) _h_den_lowpt[it->first]->fill(eta, weight);
            }
            else if (pT < _pt2_edge) {
              // filling histos for numerator and denominator
              if (id == -abs(it->second.first)) _h_num_midpt[it->first]->fill(eta, weight);
              if (id ==  abs(it->second.first)) _h_den_midpt[it->first]->fill(eta, weight);
            }
            else {
              // filling histos for numerator and denominator
              if (id == -abs(it->second.first)) _h_num_highpt[it->first]->fill(eta, weight);
              if (id ==  abs(it->second.first)) _h_den_highpt[it->first]->fill(eta, weight);
            }
          }
          else {
            // check what type of ratio is
            if (pT < _pt1_edge) {
              // filling histos for numerator and denominator
              if (abs(id) == abs(it->second.first))  _h_num_lowpt[it->first]->fill(eta, weight);
              if (abs(id) == abs(it->second.second)) _h_den_lowpt[it->first]->fill(eta, weight);
            }
            else if (pT < _pt2_edge) {
              // filling histos for numerator and denominator
              if (abs(id) == abs(it->second.first))  _h_num_midpt[it->first]->fill(eta, weight);
              if (abs(id) == abs(it->second.second)) _h_den_midpt[it->first]->fill(eta, weight);
            }
            else {
              // filling histos for numerator and denominator
              if (abs(id) == abs(it->second.first))  _h_num_highpt[it->first]->fill(eta, weight);
              if (abs(id) == abs(it->second.second)) _h_den_highpt[it->first]->fill(eta, weight);
            }
          }
        }
      }
    }


    // Generate the ratio histograms
    void finalize() {
      std::map<std::string, std::pair<int, int> >::iterator it;

      // booking histograms
      for (it=_ratiotype.begin(); it!=_ratiotype.end(); it++) {
        divide(_h_num_lowpt[it->first],  _h_den_lowpt[it->first],  _h_ratio_lowpt[it->first]);
        divide(_h_num_midpt[it->first],  _h_den_midpt[it->first],  _h_ratio_midpt[it->first]);
        divide(_h_num_highpt[it->first], _h_den_highpt[it->first], _h_ratio_highpt[it->first]);
      }
    }

    //@}


    private:


    // Get particle lifetime from hardcoded data
    double getLifeTime(int pid) {
      pid = abs(pid);
      double lft = -1.0;
      map<int, double>::iterator pPartLft = _partLftMap.find(pid);
      // search stable particle list
      if (pPartLft == _partLftMap.end()) {
        if (pid <= 100) return 0.0;
        for (size_t i=0; i < sizeof(_stablePDGIds)/sizeof(unsigned int); i++) {
          if (pid == _stablePDGIds[i]) {
            lft = 0.0;
            break;
          }
        }
      } else {
        lft = (*pPartLft).second;
      }
      if (lft < 0.0 && PID::isHadron(pid)) {
        MSG_ERROR("Could not determine lifetime for particle with PID " << pid
            << "... This will be considered unprompt!");
      }
      return lft;
    }

    // Data members like post-cuts event weight counters go here
    const double getMotherLifeTimeSum(const Particle& p) {
      if (p.genParticle() == NULL) return -1.;
      double lftSum = 0.;
      double plft = 0.;
      const GenParticle* part = p.genParticle();
      GenVertex* ivtx = part->production_vertex();
      while(ivtx)
      {
        if (ivtx->particles_in_size() < 1) { lftSum = -1.; break; };
        const HepMC::GenVertex::particles_in_const_iterator iPart_invtx = ivtx->particles_in_const_begin();
        part = (*iPart_invtx);
        if ( !(part) ) { lftSum = -1.; break; };
        ivtx = part->production_vertex();
        if ( (part->pdg_id() == 2212) || !(ivtx) ) break; // reached beam
        plft = getLifeTime(part->pdg_id());
        if (plft < 0.) { lftSum = -1.; break; };
        lftSum += plft;
      };
      return (lftSum * c_light);
    }

    /// @name Private variables
    // Momentum threshold
    double _p_min;

    // The edges of the intervals of transversal momentum
    double _pt_min;
    double _pt1_edge;
    double _pt2_edge;

    // The limits of the pseudorapidity window
    int    _eta_nbins;
    double _eta_min;
    double _eta_max;

    // Map between PDG id and particle lifetimes in seconds
    std::map<int, double> _partLftMap;

    // Set of PDG Ids for stable particles (PDG Id <= 100 are considered stable)
    static const int _stablePDGIds[205];

    // Define histograms
    // ratio
    std::map<std::string, Scatter2DPtr > _h_ratio_lowpt;
    std::map<std::string, Scatter2DPtr > _h_ratio_midpt;
    std::map<std::string, Scatter2DPtr > _h_ratio_highpt;
    // numerator
    std::map<std::string, Histo1DPtr > _h_num_lowpt;
    std::map<std::string, Histo1DPtr > _h_num_midpt;
    std::map<std::string, Histo1DPtr > _h_num_highpt;
    // denominator
    std::map<std::string, Histo1DPtr > _h_den_lowpt;
    std::map<std::string, Histo1DPtr > _h_den_midpt;
    std::map<std::string, Histo1DPtr > _h_den_highpt;

    // Map of ratios and IDs of numerator and denominator
    std::map<string, pair<int,int> > _ratiotype;

    // Fill the PDG Id to Lifetime[seconds] map
    // Data was extracted from LHCb Particle Table through LHCb::ParticlePropertySvc
    bool fillMap(map<int, double> &m) {
      m[6] =  4.707703E-25;  m[11] =  1.E+16;  m[12] =  1.E+16;
      m[13] =  2.197019E-06;  m[14] =  1.E+16;  m[15] =  2.906E-13;  m[16] =  1.E+16;  m[22] =  1.E+16;
      m[23] =  2.637914E-25;  m[24] =  3.075758E-25;  m[25] =  9.4E-26;  m[35] =  9.4E-26;
      m[36] =  9.4E-26;  m[37] =  9.4E-26;  m[84] =  3.335641E-13;  m[85] =  1.290893E-12;
      m[111] =  8.4E-17;  m[113] =  4.405704E-24;  m[115] =  6.151516E-24;  m[117] =  4.088275E-24;
      m[119] =  2.102914E-24;  m[130] =  5.116E-08;  m[150] =  1.525E-12;  m[211] =  2.6033E-08;
      m[213] =  4.405704E-24;  m[215] =  6.151516E-24;  m[217] =  4.088275E-24;  m[219] =  2.102914E-24;
      m[221] =  5.063171E-19;  m[223] =  7.752794E-23;  m[225] =  3.555982E-24;  m[227] =  3.91793E-24;
      m[229] =  2.777267E-24;  m[310] =  8.953E-11;  m[313] =  1.308573E-23;  m[315] =  6.038644E-24;
      m[317] =  4.139699E-24;  m[319] =  3.324304E-24;  m[321] =  1.238E-08;  m[323] =  1.295693E-23;
      m[325] =  6.682357E-24;  m[327] =  4.139699E-24;  m[329] =  3.324304E-24;  m[331] =  3.210791E-21;
      m[333] =  1.545099E-22;  m[335] =  9.016605E-24;  m[337] =  7.565657E-24;  m[350] =  1.407125E-12;
      m[411] =  1.04E-12;  m[413] =  6.856377E-21;  m[415] =  1.778952E-23;  m[421] =  4.101E-13;
      m[423] =  1.000003E-19;  m[425] =  1.530726E-23;  m[431] =  5.E-13;  m[433] =  1.000003E-19;
      m[435] =  3.291061E-23;  m[441] =  2.465214E-23;  m[443] =  7.062363E-21;  m[445] =  3.242425E-22;
      m[510] =  1.525E-12;  m[511] =  1.525E-12;  m[513] =  1.000019E-19;  m[515] =  1.31E-23;
      m[521] =  1.638E-12;  m[523] =  1.000019E-19;  m[525] =  1.31E-23;  m[530] =  1.536875E-12;
      m[531] =  1.472E-12;  m[533] =  1.E-19;  m[535] =  1.31E-23;  m[541] =  4.5E-13;
      m[553] =  1.218911E-20;  m[1112] =  4.539394E-24;  m[1114] =  5.578069E-24;  m[1116] =  1.994582E-24;
      m[1118] =  2.269697E-24;  m[1212] =  4.539394E-24;  m[1214] =  5.723584E-24;  m[1216] =  1.994582E-24;
      m[1218] =  1.316424E-24;  m[2112] =  8.857E+02;  m[2114] =  5.578069E-24;  m[2116] =  4.388081E-24;
      m[2118] =  2.269697E-24;  m[2122] =  4.539394E-24;  m[2124] =  5.723584E-24;  m[2126] =  1.994582E-24;
      m[2128] =  1.316424E-24;  m[2212] =  1.E+16;  m[2214] =  5.578069E-24;  m[2216] =  4.388081E-24;
      m[2218] =  2.269697E-24;  m[2222] =  4.539394E-24;  m[2224] =  5.578069E-24;  m[2226] =  1.994582E-24;
      m[2228] =  2.269697E-24;  m[3112] =  1.479E-10;  m[3114] =  1.670589E-23;  m[3116] =  5.485102E-24;
      m[3118] =  3.656734E-24;  m[3122] =  2.631E-10;  m[3124] =  4.219309E-23;  m[3126] =  8.227653E-24;
      m[3128] =  3.291061E-24;  m[3212] =  7.4E-20;  m[3214] =  1.828367E-23;  m[3216] =  5.485102E-24;
      m[3218] =  3.656734E-24;  m[3222] =  8.018E-11;  m[3224] =  1.838582E-23;  m[3226] =  5.485102E-24;
      m[3228] =  3.656734E-24;  m[3312] =  1.639E-10;  m[3314] =  6.648608E-23;  m[3322] =  2.9E-10;
      m[3324] =  7.233101E-23;  m[3334] =  8.21E-11;  m[4112] =  2.991874E-22;  m[4114] =  4.088274E-23;
      m[4122] =  2.E-13;  m[4132] =  1.12E-13;  m[4212] =  3.999999E-22;  m[4214] =  3.291061E-22;
      m[4222] =  2.951624E-22;  m[4224] =  4.417531E-23;  m[4232] =  4.42E-13;  m[4332] =  6.9E-14;
      m[4412] =  3.335641E-13;  m[4422] =  3.335641E-13;  m[4432] =  3.335641E-13;  m[5112] =  1.E-19;
      m[5122] =  1.38E-12;  m[5132] =  1.42E-12;  m[5142] =  1.290893E-12;  m[5212] =  1.E-19;
      m[5222] =  1.E-19;  m[5232] =  1.42E-12;  m[5242] =  1.290893E-12;  m[5312] =  1.E-19;
      m[5322] =  1.E-19;  m[5332] =  1.55E-12;  m[5342] =  1.290893E-12;  m[5442] =  1.290893E-12;
      m[5512] =  1.290893E-12;  m[5522] =  1.290893E-12;  m[5532] =  1.290893E-12;  m[5542] =  1.290893E-12;
      m[10111] =  2.48382E-24;  m[10113] =  4.635297E-24;  m[10115] =  2.54136E-24;  m[10211] =  2.48382E-24;
      m[10213] =  4.635297E-24;  m[10215] =  2.54136E-24;  m[10223] =  1.828367E-24;  m[10225] =  3.636531E-24;
      m[10311] =  2.437823E-24;  m[10313] =  7.313469E-24;  m[10315] =  3.538775E-24;
      m[10321] =  2.437823E-24;  m[10323] =  7.313469E-24;  m[10325] =  3.538775E-24;
      m[10331] =  4.804469E-24;  m[10411] =  4.38E-24;  m[10413] =  3.29E-23;  m[10421] =  4.38E-24;
      m[10423] =  3.22653E-23;  m[10431] =  6.5821E-22;  m[10433] =  6.5821E-22;  m[10441] =  6.453061E-23;
      m[10511] =  4.39E-24;  m[10513] =  1.65E-23;  m[10521] =  4.39E-24;  m[10523] =  1.65E-23;
      m[10531] =  4.39E-24;  m[10533] =  1.65E-23;  m[11114] =  2.194041E-24;  m[11116] =  1.828367E-24;
      m[11212] =  1.880606E-24;  m[11216] =  1.828367E-24;  m[12112] =  2.194041E-24;
      m[12114] =  2.194041E-24;  m[12116] =  5.063171E-24;  m[12126] =  1.828367E-24;
      m[12212] =  2.194041E-24;  m[12214] =  2.194041E-24;  m[12216] =  5.063171E-24;
      m[12224] =  2.194041E-24;  m[12226] =  1.828367E-24;  m[13112] =  6.582122E-24;  m[13114] =  1.09702E-23;
      m[13116] =  5.485102E-24;  m[13122] =  1.316424E-23;  m[13124] =  1.09702E-23;  m[13126] =  6.928549E-24;
      m[13212] =  6.582122E-24;  m[13214] =  1.09702E-23;  m[13216] =  5.485102E-24;  m[13222] =  6.582122E-24;
      m[13224] =  1.09702E-23;  m[13226] =  5.485102E-24;  m[13314] =  2.742551E-23;
      m[13324] =  2.742551E-23;  m[14122] =  1.828367E-22;  m[20022] =  1.E+16;  m[20113] =  1.567172E-24;
      m[20213] =  1.567172E-24;  m[20223] =  2.708692E-23;  m[20313] =  3.782829E-24;
      m[20315] =  2.384827E-24;  m[20323] =  3.782829E-24;  m[20325] =  2.384827E-24;
      m[20333] =  1.198929E-23;  m[20413] =  2.63E-24;  m[20423] =  2.63E-24;  m[20433] =  6.5821E-22;
      m[20443] =  7.395643E-22;  m[20513] =  2.63E-24;  m[20523] =  2.63E-24;  m[20533] =  2.63E-24;
      m[21112] =  2.632849E-24;  m[21114] =  3.291061E-24;  m[21212] =  2.632849E-24;
      m[21214] =  6.582122E-24;  m[22112] =  4.388081E-24;  m[22114] =  3.291061E-24;
      m[22122] =  2.632849E-24;  m[22124] =  6.582122E-24;  m[22212] =  4.388081E-24;
      m[22214] =  3.291061E-24;  m[22222] =  2.632849E-24;  m[22224] =  3.291061E-24;
      m[23112] =  7.313469E-24;  m[23114] =  2.991874E-24;  m[23122] =  4.388081E-24;
      m[23124] =  6.582122E-24;  m[23126] =  3.291061E-24;  m[23212] =  7.313469E-24;
      m[23214] =  2.991874E-24;  m[23222] =  7.313469E-24;  m[23224] =  2.991874E-24;
      m[30113] =  2.632849E-24;  m[30213] =  2.632849E-24;  m[30221] =  1.880606E-24;
      m[30223] =  2.089563E-24;  m[30313] =  2.056913E-24;  m[30323] =  2.056913E-24;
      m[30443] =  2.419898E-23;  m[31114] =  1.880606E-24;  m[31214] =  3.291061E-24;
      m[32112] =  3.989164E-24;  m[32114] =  1.880606E-24;  m[32124] =  3.291061E-24;
      m[32212] =  3.989164E-24;  m[32214] =  1.880606E-24;  m[32224] =  1.880606E-24;
      m[33122] =  1.880606E-23;  m[42112] =  6.582122E-24;  m[42212] =  6.582122E-24;
      m[43122] =  2.194041E-24;  m[53122] =  4.388081E-24;  m[100111] =  1.645531E-24;
      m[100113] =  1.64553E-24;  m[100211] =  1.645531E-24;  m[100213] =  1.64553E-24;
      m[100221] =  1.196749E-23;  m[100223] =  3.061452E-24;  m[100313] =  2.837122E-24;
      m[100323] =  2.837122E-24;  m[100331] =  4.459432E-25;  m[100333] =  4.388081E-24;
      m[100441] =  4.701516E-23;  m[100443] =  2.076379E-21;  m[100553] =  2.056913E-20;
      m[200553] =  3.242425E-20;  m[300553] =  3.210791E-23;  m[9000111] =  8.776163E-24;
      m[9000211] =  8.776163E-24;  m[9000443] =  8.227652E-24;  m[9000553] =  5.983747E-24;
      m[9010111] =  3.164482E-24;  m[9010211] =  3.164482E-24;  m[9010221] =  9.403031E-24;
      m[9010443] =  8.438618E-24;  m[9010553] =  8.3318E-24;  m[9020443] =  1.061633E-23;
      m[9030221] =  6.038644E-24;  m[9042413] =  2.07634E-21;  m[9050225] =  1.394517E-24;
      m[9060225] =  3.291061E-24;  m[9080225] =  4.388081E-24;  m[9090225] =  2.056913E-24;
      m[9910445] =  2.07634E-21;  m[9920443] =  2.07634E-21;
      return true;
    }

  };


  const int LHCB_2012_I1119400::_stablePDGIds[205] = {
    311, 543, 545, 551, 555, 557, 1103, 2101, 2103, 2203, 3101, 3103, 3201, 3203, 3303,
    4101, 4103, 4124, 4201, 4203, 4301, 4303, 4312, 4314, 4322, 4324, 4334, 4403, 4414,
    4424, 4434, 4444, 5101, 5103, 5114, 5201, 5203, 5214, 5224, 5301, 5303, 5314, 5324,
    5334, 5401, 5403, 5412, 5414, 5422, 5424, 5432, 5434, 5444, 5503, 5514, 5524, 5534,
    5544, 5554, 10022, 10333, 10335, 10443, 10541, 10543, 10551, 10553, 10555, 11112,
    12118, 12122, 12218, 12222, 13316, 13326, 20543, 20553, 20555, 23314, 23324, 30343,
    30353, 30363, 30553, 33314, 33324, 41214, 42124, 52114, 52214, 100311, 100315, 100321,
    100325, 100411, 100413, 100421, 100423, 100551, 100555, 100557, 110551, 110553, 110555,
    120553, 120555, 130553, 200551, 200555, 210551, 210553, 220553, 1000001, 1000002,
    1000003, 1000004, 1000005, 1000006, 1000011, 1000012, 1000013, 1000014, 1000015,
    1000016, 1000021, 1000022, 1000023, 1000024, 1000025, 1000035, 1000037, 1000039,
    2000001, 2000002, 2000003, 2000004, 2000005, 2000006, 2000011, 2000012, 2000013,
    2000014, 2000015, 2000016, 3000111, 3000113, 3000211, 3000213, 3000221, 3000223,
    3000331, 3100021, 3100111, 3100113, 3200111, 3200113, 3300113, 3400113, 4000001,
    4000002, 4000011, 4000012, 5000039, 9000221, 9900012, 9900014, 9900016, 9900023,
    9900024, 9900041, 9900042 };


  // Plugin hook
  DECLARE_RIVET_PLUGIN(LHCB_2012_I1119400);

}