ThermalParticleSystem.cpp

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/*
 * Thermal-FIST package
 * 
 * Copyright (c) 2014-2019 Volodymyr Vovchenko
 *
 * GNU General Public License (GPLv3 or later)
 */
#include "HRGBase/ThermalParticleSystem.h"
 
#include <fstream>
#include <algorithm>
#include <queue>
#include <iostream>
#include <iomanip>
#include <sstream>
#include <set>
#include <cmath>
#include <cstdlib>
 
#include "HRGBase/Utility.h"
#include "HRGBase/ExtraParticles.h"
 
using namespace std;
 
namespace thermalfist {
 
  namespace {
    bool cmpParticleMass(const ThermalParticle &a, const ThermalParticle &b) {
      return (a.Mass() < b.Mass());
    }

    bool cmpParticleMassAndPdg(const ThermalParticle& a, const ThermalParticle& b) {
      if (a.Mass() == b.Mass()) {
        if (abs(a.PdgId()) != abs(b.PdgId()))
          return abs(a.PdgId()) < abs(b.PdgId());
        return (a.PdgId() > b.PdgId());
      }
      return (a.Mass() < b.Mass());
    }
    
    bool cmpParticlePDG(const ThermalParticle &a, const ThermalParticle &b) {
      if (abs(a.Charm()) != abs(b.Charm())) return (abs(a.Charm()) < abs(b.Charm()));
      if (abs(a.AbsoluteCharm()) != abs(b.AbsoluteCharm())) return (abs(a.AbsoluteCharm()) < abs(b.AbsoluteCharm()));
      if (abs(a.BaryonCharge()) != abs(b.BaryonCharge())) return (abs(a.BaryonCharge()) < abs(b.BaryonCharge()));
      if (abs(a.Strangeness()) != abs(b.Strangeness())) return (abs(a.Strangeness()) < abs(b.Strangeness()));
      if (a.Mass() == b.Mass()) {
        if (abs(a.PdgId()) != abs(b.PdgId()))
          return abs(a.PdgId()) < abs(b.PdgId());
        return (a.PdgId() > b.PdgId());
      }
      return (a.Mass() < b.Mass());
    }
  }
 
  const std::string ThermalParticleSystem::flag_no_antiparticles = "no_antiparticles";
  const std::string ThermalParticleSystem::flag_nostrangeness = "no_strangeness";
  const std::string ThermalParticleSystem::flag_nocharm = "no_charm";
  const std::string ThermalParticleSystem::flag_nonuclei = "no_nuclei";
  const std::string ThermalParticleSystem::flag_noexcitednuclei = "no_excitednuclei";
 
 
  ThermalParticleSystem::ThermalParticleSystem(const std::vector<std::string>& ListFiles, const std::vector<std::string>& DecayFiles, const std::set<std::string>& flags, double mcut)
  {
    Initialize(ListFiles, DecayFiles, flags, mcut);
  }
 
  ThermalParticleSystem::~ThermalParticleSystem(void)
  {
  }
 
  ThermalParticle::ParticleDecaysVector ThermalParticleSystem::GetDecaysFromAntiParticle(const ThermalParticle::ParticleDecaysVector& Decays) {
    ThermalParticle::ParticleDecaysVector ret = Decays;
    for (unsigned int i = 0; i < ret.size(); ++i) {
      for (unsigned int j = 0; j < ret[i].mDaughters.size(); ++j) {
        if (m_PDGtoID.count(-ret[i].mDaughters[j]) > 0) ret[i].mDaughters[j] = -ret[i].mDaughters[j];
      }
    }
    return ret;
  }
 
  void ThermalParticleSystem::ProcessDecays()
  {
    FillResonanceDecays(); 
    FillResonanceDecaysByFeeddown();
  }
 
  void ThermalParticleSystem::FillDecayProperties()
  {
    for (size_t i = 0; i < m_Particles.size(); ++i) {
      if (m_Particles[i].Decays().size() != 0) {
        double tsumb = 0.;
 
        for (size_t j = 0; j < m_Particles[i].Decays().size(); ++j) {
 
          m_Particles[i].Decays()[j].mPole = m_Particles[i].Mass();
 
          std::string tname = "";
 
          double M0 = 0.;
          double tS = 0.;
          for (size_t k = 0; k < m_Particles[i].Decays()[j].mDaughters.size(); ++k) {
            int tid = PdgToId(m_Particles[i].Decays()[j].mDaughters[k]);
            if (tid != -1) {
              M0 += m_Particles[tid].Mass();
              tS += max(0., (m_Particles[tid].Degeneracy() - 1.) / 2.);
              if (k != 0)
                tname += " - ";
              tname += m_Particles[tid].Name();
            }
          }
          m_Particles[i].Decays()[j].mM0 = M0;
          m_Particles[i].Decays()[j].mL = abs(max(0., (m_Particles[i].Degeneracy() - 1.) / 2.) - tS);
 
          tsumb += m_Particles[i].Decays()[j].mBratio;
          m_Particles[i].Decays()[j].mBratioAverage = m_Particles[i].Decays()[j].mBratio;
 
          if (tname.size() > 0)
            m_Particles[i].Decays()[j].mChannelName = tname;
        }
      }
      m_Particles[i].CalculateAndSetDynamicalThreshold();
      m_Particles[i].FillCoefficientsDynamical();
    }
  }
 
  void ThermalParticleSystem::FillDecayThresholds()
  {
    for (size_t i = 0; i < m_Particles.size(); ++i) {
      if (m_Particles[i].Decays().size() != 0) {
        for (size_t j = 0; j < m_Particles[i].Decays().size(); ++j) {
          double M0 = 0.;
          for (size_t k = 0; k < m_Particles[i].Decays()[j].mDaughters.size(); ++k) {
            if (PdgToId(m_Particles[i].Decays()[j].mDaughters[k]) != -1)
              M0 += m_Particles[PdgToId(m_Particles[i].Decays()[j].mDaughters[k])].Mass();
          }
          m_Particles[i].Decays()[j].mM0 = M0;
        }
        m_Particles[i].FillCoefficients();
      }
    }
  }
 
  void ThermalParticleSystem::FillResonanceDecays() {
    m_DecayContributionsByFeeddown[Feeddown::StabilityFlag].resize(m_Particles.size());
    m_DecayCumulants.resize(m_Particles.size());
    m_DecayProbabilities.resize(m_Particles.size());
    for (size_t i = 0; i < m_Particles.size(); ++i) {
      m_DecayContributionsByFeeddown[Feeddown::StabilityFlag][i].resize(0);
      m_DecayProbabilities[i].resize(0);
      m_DecayCumulants[i].resize(0);
    }
    for (int i = static_cast<int>(m_Particles.size()) - 1; i >= 0; i--)
      if (!m_Particles[i].IsStable()) {
        GoResonance(i, i, 1.);
      }
 
    for (size_t i = 0; i < m_Particles.size(); ++i) {
      for (size_t j = 0; j < m_DecayContributionsByFeeddown[Feeddown::StabilityFlag][i].size(); ++j) {
        SingleDecayContribution &DecayContrib = m_DecayContributionsByFeeddown[Feeddown::StabilityFlag][i][j];
        vector<double> tmp = GoResonanceDecayProbs(DecayContrib.second, i, true);
        if (tmp.size() > 1) m_DecayProbabilities[i].push_back(make_pair(tmp, DecayContrib.second));
      }
      for (size_t j = 0; j < m_DecayProbabilities[i].size(); ++j) {
        double tmp = 0., tmp2 = 0., tmp3 = 0., tmp4 = 0.;
        for (int jj = 0; jj < static_cast<int>(m_DecayProbabilities[i][j].first.size()); ++jj) {
          tmp += m_DecayProbabilities[i][j].first[jj] * jj;
          tmp2 += m_DecayProbabilities[i][j].first[jj] * jj * jj;
          tmp3 += m_DecayProbabilities[i][j].first[jj] * jj * jj * jj;
          tmp4 += m_DecayProbabilities[i][j].first[jj] * jj * jj * jj * jj;
        }
        double n2 = 0., n3 = 0., n4 = 0.;
        n2 = tmp2 - tmp * tmp;
        n3 = tmp3 - 3. * tmp2 * tmp + 2. * tmp * tmp * tmp;
        n4 = tmp4 - 4. * tmp3 * tmp + 6. * tmp2 * tmp * tmp - 3. * tmp * tmp * tmp * tmp - 3. * n2 * n2;
        vector<double> moments(0);
        moments.push_back(tmp);
        moments.push_back(n2);
        moments.push_back(n3);
        moments.push_back(n4);
        m_DecayCumulants[i].push_back(make_pair(moments, m_DecayProbabilities[i][j].second));
      }
    }
 
    m_DecayDistributionsMap.resize(m_Particles.size());
    m_ResonanceFinalStatesDistributions.resize(m_Particles.size());
    for (size_t i = 0; i < m_Particles.size(); ++i) {
      m_ResonanceFinalStatesDistributions[i].resize(0);
      m_DecayDistributionsMap[i].resize(0);
    }
    for (size_t i = 0; i < m_Particles.size(); ++i) {
      m_ResonanceFinalStatesDistributions[i] = GoResonanceDecayDistributions(i, true);
    }
    // Clear m_DecayDistributionsMap and memory it occupies
    std::vector< std::vector< std::pair<double, std::vector<int> > > >().swap(m_DecayDistributionsMap);
 
    for (size_t i = 0; i < m_Particles.size(); ++i) {
      vector<int> nchtyp(0);
      nchtyp.push_back(0);
      nchtyp.push_back(1);
      nchtyp.push_back(-1);
 
      m_Particles[i].Nch().resize(0);
      m_Particles[i].DeltaNch().resize(0);
 
      for (int nti = 0; nti < 3; nti++) {
        vector<double> prob = GoResonanceDecayProbsCharge(i, nchtyp[nti], true);
        double tmp = 0., tmp2 = 0., tmp3 = 0., tmp4 = 0.;
        for (int jj = 0; jj < static_cast<int>(prob.size()); ++jj) {
          tmp += prob[jj] * jj;
          tmp2 += prob[jj] * jj * jj;
          tmp3 += prob[jj] * jj * jj * jj;
          tmp4 += prob[jj] * jj * jj * jj * jj;
        }
        double n2 = 0., n3 = 0., n4 = 0.;
        n2 = tmp2 - tmp * tmp;
        n3 = tmp3 - 3. * tmp2 * tmp + 2. * tmp * tmp * tmp;
        n4 = tmp4 - 4. * tmp3 * tmp + 6. * tmp2 * tmp * tmp - 3. * tmp * tmp * tmp * tmp - 3. * n2 * n2;
        m_Particles[i].Nch().push_back(tmp);
        m_Particles[i].DeltaNch().push_back(n2);
      }
 
    }
  }
 
 
  void ThermalParticleSystem::GoResonance(int ind, int startind, double BR) {
    DecayContributionsToParticle& DecayContrib = m_DecayContributionsByFeeddown[Feeddown::StabilityFlag][ind];
    if (ind != startind && DecayContrib.size() > 0 && DecayContrib[DecayContrib.size() - 1].second == startind)
    {
      DecayContrib[DecayContrib.size() - 1].first += BR;
    }
    else if (ind != startind) 
      DecayContrib.push_back(make_pair(BR, startind));
 
    if (!m_Particles[ind].IsStable()) {
      for (size_t i = 0; i < m_Particles[ind].Decays().size(); ++i) {
        const ParticleDecayChannel& decaychannel = m_Particles[ind].Decays()[i];
        double tbr = decaychannel.mBratio;
 
        if (m_ResonanceWidthIntegrationType == ThermalParticle::eBW && ind == startind)
          tbr = decaychannel.mBratioAverage;
 
        for (size_t j = 0; j < decaychannel.mDaughters.size(); ++j) {
          if (m_PDGtoID.count(decaychannel.mDaughters[j]) != 0)
            GoResonance(m_PDGtoID[decaychannel.mDaughters[j]], startind, BR*tbr);
        }
      }
    }
  }
 
  std::vector<double> ThermalParticleSystem::GoResonanceDecayProbs(int ind, int goalind, bool firstdecay) {
    std::vector<double> ret(1, 0.);
    if (m_Particles[ind].IsStable()) {
      if (ind == goalind) ret.push_back(1.);
      else ret[0] = 1.;
      return ret;
    }
    else if (ind == goalind) {
      ret.push_back(1.);
      return ret;
    }
    else {
      ret[0] = 0.;
      vector<double> tret;
      for (size_t i = 0; i < m_Particles[ind].Decays().size(); ++i) {
        double tbr = m_Particles[ind].Decays()[i].mBratio;
        if (m_ResonanceWidthIntegrationType == ThermalParticle::eBW && firstdecay)
          tbr = m_Particles[ind].Decays()[i].mBratioAverage;
 
        tret.resize(1);
        tret[0] = 1.;
        for (size_t j = 0; j < m_Particles[ind].Decays()[i].mDaughters.size(); ++j) {
          if (m_PDGtoID.count(m_Particles[ind].Decays()[i].mDaughters[j]) != 0) {
            vector<double> tmp = GoResonanceDecayProbs(m_PDGtoID[m_Particles[ind].Decays()[i].mDaughters[j]], goalind);
            vector<double> tmp2(tret.size() + tmp.size() - 1, 0.);
            for (size_t i1 = 0; i1 < tret.size(); ++i1)
              for (size_t i2 = 0; i2 < tmp.size(); ++i2)
                tmp2[i1 + i2] += tret[i1] * tmp[i2];
            tret = tmp2;
          }
        }
        if (ret.size() < tret.size()) ret.resize(tret.size(), 0.);
        for (size_t j = 0; j < tret.size(); ++j)
          ret[j] += tbr * tret[j];
      }
      double totprob = 0.;
      for (size_t i = 0; i < ret.size(); ++i)
        totprob += ret[i];
      if (totprob > 1.) {
        for (size_t i = 0; i < ret.size(); ++i)
          ret[i] *= 1. / totprob;
      }
      else {
        ret[0] += 1. - totprob;
      }
      return ret;
    }
    //return ret;
  }
 
  std::vector<double> ThermalParticleSystem::GoResonanceDecayProbsCharge(int ind, int nch, bool firstdecay)
  {
    bool fl = false;
    int tQ = m_Particles[ind].ElectricCharge();
    if (nch == 0 && tQ != 0)
      fl = true;
    if (nch == 1 && tQ > 0)
      fl = true;
    if (nch == -1 && tQ < 0)
      fl = true;
 
    std::vector<double> ret(1, 0.);
    if (m_Particles[ind].IsStable()) {
      if (fl) ret.push_back(1.);
      else ret[0] = 1.;
      return ret;
    }
    else {
      ret[0] = 0.;
      vector<double> tret;
      for (size_t i = 0; i < m_Particles[ind].Decays().size(); ++i) {
        double tbr = m_Particles[ind].Decays()[i].mBratio;
        if (m_ResonanceWidthIntegrationType == ThermalParticle::eBW && firstdecay)
          tbr = m_Particles[ind].Decays()[i].mBratioAverage;
 
        tret.resize(1);
        tret[0] = 1.;
        for (size_t j = 0; j < m_Particles[ind].Decays()[i].mDaughters.size(); ++j) {
          if (m_PDGtoID.count(m_Particles[ind].Decays()[i].mDaughters[j]) != 0) {
            vector<double> tmp = GoResonanceDecayProbsCharge(m_PDGtoID[m_Particles[ind].Decays()[i].mDaughters[j]], nch);
            vector<double> tmp2(tret.size() + tmp.size() - 1, 0.);
            for (size_t i1 = 0; i1 < tret.size(); ++i1)
              for (size_t i2 = 0; i2 < tmp.size(); ++i2)
                tmp2[i1 + i2] += tret[i1] * tmp[i2];
            tret = tmp2;
          }
        }
        if (ret.size() < tret.size())
          ret.resize(tret.size(), 0.);
        for (size_t j = 0; j < tret.size(); ++j)
          ret[j] += tbr * tret[j];
      }
      double totprob = 0.;
      for (size_t i = 0; i < ret.size(); ++i)
        totprob += ret[i];
      if (totprob > 1.) {
        for (size_t i = 0; i < ret.size(); ++i)
          ret[i] *= 1. / totprob;
      }
      else {
        ret[0] += 1. - totprob;
      }
      return ret;
    }
    //return ret;
  }
 
  ThermalParticleSystem::ResonanceFinalStatesDistribution ThermalParticleSystem::GoResonanceDecayDistributions(int ind, bool firstdecay)
  {
    if (!firstdecay && m_DecayDistributionsMap[ind].size() != 0)
      return m_DecayDistributionsMap[ind];
 
 
    std::vector< std::pair<double, std::vector<int> > > retorig(1);
    retorig[0].first = 1.;
    retorig[0].second = std::vector<int>(m_Particles.size(), 0);
    retorig[0].second[ind] = 1;
 
    std::vector< std::pair<double, std::vector<int> > > ret(0);
 
    ThermalParticle &tpart = m_Particles[ind];
 
    if (tpart.IsStable()) {
      m_ResonanceFinalStatesDistributions[ind] = retorig;
      return retorig;
    }
 
    bool wasCut = false;
 
    for (size_t i = 0; i < tpart.Decays().size(); ++i) {
      double tbr = tpart.Decays()[i].mBratio;
      if (m_ResonanceWidthIntegrationType == ThermalParticle::eBW && firstdecay)
        tbr = m_Particles[ind].Decays()[i].mBratioAverage;
 
      std::vector< std::pair<double, std::vector<int> > > tret = retorig;
 
      for (size_t j = 0; j < tpart.Decays()[i].mDaughters.size(); ++j) {
        if (m_PDGtoID.count(tpart.Decays()[i].mDaughters[j]) != 0) {
 
          std::vector< std::pair<double, std::vector<int> > > tmp = GoResonanceDecayDistributions(m_PDGtoID[tpart.Decays()[i].mDaughters[j]]);
          std::vector< std::pair<double, std::vector<int> > > tmp2(tret.size() * tmp.size());
          for (int i1 = 0; i1 < static_cast<int>(tret.size()); ++i1) {
            for (int i2 = 0; i2 < static_cast<int>(tmp.size()); ++i2) {
              tmp2[i1*tmp.size() + i2].first = tret[i1].first * tmp[i2].first;
              tmp2[i1*tmp.size() + i2].second.resize(m_Particles.size());
              for (size_t jj = 0; jj < tmp2[i1*tmp.size() + i2].second.size(); ++jj)
                tmp2[i1*tmp.size() + i2].second[jj] = tret[i1].second[jj] + tmp[i2].second[jj];
            }
          }
          tret = tmp2;
 
          // Restrict maximum number of channels to avoid memory issues
          if (static_cast<int>(tret.size()) > m_MaxDecayDistributionsSize) {
            wasCut = true;
            CuteHRGHelper::cutDecayDistributionsVector(tret, m_MaxDecayDistributionsSize);
          }
        }
      }
 
      for (size_t j = 0; j < tret.size(); ++j) {
        tret[j].first *= tbr;
        ret.push_back(tret[j]);
      }
    }
 
    // Restrict maximum number of channels to avoid memory issues
    if (static_cast<int>(ret.size()) > m_MaxDecayDistributionsSize) {
      wasCut = true;
      CuteHRGHelper::cutDecayDistributionsVector(ret, m_MaxDecayDistributionsSize);
    }
 
    if (wasCut && firstdecay) {
      printf("**WARNING** %s (%lld) Decay Distributions: Too large array, cutting the number of channels to %d\n",
        m_Particles[ind].Name().c_str(),
        m_Particles[ind].PdgId(),
        m_MaxDecayDistributionsSize);
    }
 
    double totprob = 0.;
    for (size_t i = 0; i < ret.size(); ++i)
      totprob += ret[i].first;
    if (totprob > 1.) {
      for (size_t i = 0; i < ret.size(); ++i)
        ret[i].first *= 1. / totprob;
    }
    else if (totprob < 1.) {
      double emptyprob = 1. - totprob;
      ret.push_back(std::make_pair(emptyprob, retorig[0].second));
    }
 
    if (!firstdecay)
      m_DecayDistributionsMap[ind] = ret;
 
    // Debugging
 
    //if (tpart.BaryonCharge() == 1) {
    //  printf("Checking baryon number conservation in decays for %d\n", tpart.PdgId());
    //  double tBav = 0.;
    //  for (int i = 0; i < ret.size(); ++i) {
    //    double tbr = ret[i].first;
    //    for (int j = 0; j < ret[i].second.size(); ++j)
    //      if (m_Particles[j].IsStable())
    //        tBav += tbr * ret[i].second[j] * m_Particles[j].BaryonCharge();
    //  }
    //  printf("<B> = %lf\n", tBav);
    //  //printf("Decay distributions for %d\n", tpart.PdgId());
    //  //for (int i = 0; i < ret.size(); ++i) {
    //  //  printf("%lf\n", ret[i].first);
    //  //  for (int j = 0; j < ret[i].second.size(); ++j)
    //  //    if (ret[i].second[j] > 0)
    //  //      printf("%d: %d\n", m_Particles[j].PdgId(), ret[i].second[j]);
    //  //}
    //}
 
    return ret;
  }
 
  bool ThermalParticleSystem::AcceptParticle(const ThermalParticle& part, const std::set<std::string>& flags, double mcut) const
  {
    if (mcut >= 0. && part.Mass() > mcut)
      return false;
    if (flags.count(ThermalParticleSystem::flag_nostrangeness) > 0 && part.AbsoluteStrangeness() != 0)
      return false;
    if (flags.count(ThermalParticleSystem::flag_nocharm) > 0 && part.AbsoluteCharm() != 0)
      return false;
    if (flags.count(ThermalParticleSystem::flag_nonuclei) > 0 && abs(part.BaryonCharge()) > 1)
      return false;
    if (flags.count(ThermalParticleSystem::flag_noexcitednuclei) > 0 && abs(part.BaryonCharge()) > 1 && !part.IsStable())
      return false;
    return true;
  }
 
  void ThermalParticleSystem::LoadList(const std::vector<std::string>& ListFiles, const std::vector<std::string>& DecayFiles, const std::set<std::string>& flags, double mcut)
  {
    m_NumberOfParticles = 0;
    m_Particles.resize(0);
    m_PDGtoID.clear();
 
    m_NumBaryons = m_NumCharged = m_NumStrange = m_NumCharmed = 0;
    m_MaxAbsBaryonNumber = 0;
 
    if (ListFiles.size() == 1 && CheckListIsiSS(ListFiles[0])) {
      LoadListiSS(ListFiles[0], flags, mcut);
      return;
    }
 
    for(int i = 0; i < ListFiles.size(); ++i)
      AddParticlesToListFromFile(ListFiles[i], flags, mcut);
 
    FinalizeList();
 
    std::vector<std::string> tDecayFiles = DecayFiles;
    if (tDecayFiles.size() == 1 && tDecayFiles[0] == "")
      tDecayFiles.clear();
 
    if (tDecayFiles.size() == 0 && ListFiles.size() > 0) {
      for (size_t ilist = 0; ilist < ListFiles.size(); ++ilist) {
        string decayprefix = "";
        string decayprefixfile = "";
 
        for (int i = ListFiles[ilist].size() - 1; i >= 0; --i) {
          if (ListFiles[ilist][i] == '\\' || ListFiles[ilist][i] == '/')
          {
            decayprefix = ListFiles[ilist].substr(0, i + 1);
            break;
          }
          decayprefixfile += ListFiles[ilist][i];
        }
 
        reverse(decayprefixfile.begin(), decayprefixfile.end());
 
 
        string DecayFile = "";
        if (decayprefixfile.substr(0, 4) == "list") {
          DecayFile = decayprefix + "decays" + decayprefixfile.substr(4);
        }
        else {
          DecayFile = decayprefix + "decays.dat";
        }
 
        if (ilist == 0)
          tDecayFiles.push_back(decayprefix + "decays.dat");
 
        tDecayFiles.push_back(DecayFile);
      }
    }
 
    LoadDecays(tDecayFiles, flags);
 
    FinalizeListLoad();
  }
 
  void ThermalParticleSystem::LoadList(const std::string& InputFile, const std::string& DecayFile, bool GenAntiP, double mcut) {
    
    std::set<std::string> flags;
    if (!GenAntiP)
      flags.insert(ThermalParticleSystem::flag_no_antiparticles);
 
    std::vector<std::string> DecayFiles(0);
    if (DecayFile != "")
      DecayFiles.push_back(DecayFile);
 
    LoadList(std::vector<std::string>(1, InputFile), DecayFiles, flags, mcut);
  }
 
  void ThermalParticleSystem::AddParticlesToListFromFile(const std::string& InputFile, const std::set<std::string>& flags, double mcut)
  {
    ifstream fin;
    fin.open(InputFile.c_str());
    if (fin.is_open()) {
 
      char tmpc[2000];
      fin.getline(tmpc, 2000);
      string tmp = string(tmpc);
      vector<string> elems = CuteHRGHelper::split(tmp, '#');
 
      int flnew = 0;
      if (elems.size() < 1 || CuteHRGHelper::split(elems[0], ';').size() < 4)
        flnew = 1;
      else
        flnew = 0;
 
      fin.clear();
      fin.seekg(0, ios::beg);
 
      if (flnew == 1)
        LoadTable_NewFormat(fin, flags, mcut);
      else
        LoadTable_OldFormat(fin, flags, mcut);
 
      fin.close();
 
    }
  }
 
  void ThermalParticleSystem::LoadTable_OldFormat(std::ifstream & fin, const std::set<std::string>& flags, double mcut)
  {
    bool GenerateAntiParticles = (flags.count(ThermalParticleSystem::flag_no_antiparticles) == 0);
    if (fin.is_open()) {
      string tmp;
      char tmpc[500];
      fin.getline(tmpc, 500);
      tmp = string(tmpc);
      while (1) {
        vector<string> fields = CuteHRGHelper::split(tmp, ';');
        if (fields.size() < 14) break;
        int stable, spin, stat, str, bary, chg, charm;
        long long pdgid;
        double mass, width, threshold, abss, absc, radius = 0.5;
        string name, decayname = "";
        stable = atoi(fields[0].c_str());
        name = fields[1];
        //pdgid = atoi(fields[2].c_str());
        pdgid = stringToLongLong(fields[2]);
        spin = atoi(fields[3].c_str());
        stat = atoi(fields[4].c_str());
        mass = atof(fields[5].c_str());
        str = atoi(fields[6].c_str());
        bary = atoi(fields[7].c_str());
        chg = atoi(fields[8].c_str());
        charm = atoi(fields[9].c_str());
        abss = atof(fields[10].c_str());
        absc = atof(fields[11].c_str());
        width = atof(fields[12].c_str());
        threshold = atof(fields[13].c_str());
        if (fields.size() >= 15) radius = atof(fields[14].c_str());
        if (fields.size() == 16) decayname = fields[15];
 
        ThermalParticle part_candidate = ThermalParticle(static_cast<bool>(stable), name, pdgid, static_cast<double>(spin), stat, mass, str, bary, chg, abss, width, threshold, charm, absc);
 
        //if (mcut >= 0. && mass > mcut) {
        if (m_PDGtoID.count(pdgid) != 0) {
          throw std::invalid_argument("ThermalParticleSystem::LoadTable_NewFormat: Duplicate pdg code " + std::to_string(pdgid));
        }
        if (!AcceptParticle(part_candidate, flags, mcut) || m_PDGtoID.count(pdgid) != 0) {
          fin.getline(tmpc, 500);
          tmp = string(tmpc);
          continue;
        }
 
        if (bary != 0)  m_NumBaryons++;
        if (chg != 0)   m_NumCharged++;
        if (str != 0)   m_NumStrange++;
        if (charm != 0) m_NumCharmed++;
        m_MaxAbsBaryonNumber = max(m_MaxAbsBaryonNumber, abs(bary));
 
        m_Particles.push_back(part_candidate); 
        m_PDGtoID[pdgid] = m_Particles.size() - 1;
        m_NumberOfParticles++;
 
        if (GenerateAntiParticles && !(bary == 0 && chg == 0 && str == 0 && charm == 0) && (m_PDGtoID.count(-pdgid) == 0)) {
 
          if (bary != 0)  m_NumBaryons++;
          if (chg != 0)   m_NumCharged++;
          if (str != 0)   m_NumStrange++;
          if (charm != 0) m_NumCharmed++;
 
          if (bary == 0 && name[name.size() - 1] == '+')
            name[name.size() - 1] = '-';
          else if (bary == 0 && name[name.size() - 1] == '-')
            name[name.size() - 1] = '+';
          else
            name = "anti-" + name;
          m_Particles.push_back(ThermalParticle(static_cast<bool>(stable), name, -pdgid, static_cast<double>(spin), stat, mass, -str, -bary, -chg, abss, width, threshold, -charm, absc));
          m_Particles[m_Particles.size() - 1].SetAntiParticle(true);
          m_PDGtoID[-pdgid] = m_Particles.size() - 1;
        }
 
        fin.getline(tmpc, 500);
        tmp = string(tmpc);
      }
    }
  }
 
  void ThermalParticleSystem::LoadTable_NewFormat(std::ifstream & fin, const std::set<std::string>& flags, double mcut)
  {
    bool GenerateAntiParticles = (flags.count(ThermalParticleSystem::flag_no_antiparticles) == 0);
    if (fin.is_open()) {
      char cc[2000];
      while (!fin.eof()) {
        fin.getline(cc, 2000);
        string tmp = string(cc);
        vector<string> elems = CuteHRGHelper::split(tmp, '#');
        if (elems.size() < 1 || elems[0].size() == 0)
          continue;
 
        istringstream iss(elems[0]);
 
        int stable, stat, str, bary, chg, charm;
        long long pdgid;
        double mass, degeneracy, width, threshold, abss, absc;
        string name;
 
        if (iss >> pdgid
          >> name
          >> stable
          >> mass
          >> degeneracy
          >> stat
          >> bary
          >> chg
          >> str
          >> charm
          >> abss
          >> absc
          >> width
          >> threshold) {
 
          ThermalParticle part_candidate = ThermalParticle((bool)stable, name, pdgid, degeneracy, stat, mass, str, bary, chg, abss, width, threshold, charm, absc);
 
          //if (mcut >= 0. && mass > mcut)
          if (m_PDGtoID.count(pdgid) != 0) {
            throw std::invalid_argument("ThermalParticleSystem::LoadTable_NewFormat: Duplicate pdg code " + std::to_string(pdgid));
          }
 
          if (!AcceptParticle(part_candidate, flags, mcut) || m_PDGtoID.count(pdgid) != 0)
            continue;
 
          if (bary != 0)  m_NumBaryons++;
          if (chg != 0)   m_NumCharged++;
          if (str != 0)   m_NumStrange++;
          if (charm != 0) m_NumCharmed++;
          m_MaxAbsBaryonNumber = max(m_MaxAbsBaryonNumber, abs(bary));
 
          m_Particles.push_back(part_candidate);
          m_PDGtoID[pdgid] = m_Particles.size() - 1;
          m_NumberOfParticles++;
 
          if (GenerateAntiParticles && !(bary == 0 && chg == 0 && str == 0 && charm == 0) && (m_PDGtoID.count(-pdgid) == 0)) {
 
            if (bary != 0)  m_NumBaryons++;
            if (chg != 0)   m_NumCharged++;
            if (str != 0)   m_NumStrange++;
            if (charm != 0) m_NumCharmed++;
 
            if (bary == 0 && name[name.size() - 1] == '+')
              name[name.size() - 1] = '-';
            else if (bary == 0 && name[name.size() - 1] == '-')
              name[name.size() - 1] = '+';
            else
              name = "anti-" + name;
            m_Particles.push_back(ThermalParticle((bool)stable, name, -pdgid, degeneracy, stat, mass, -str, -bary, -chg, abss, width, threshold, -charm, absc));
            m_Particles[m_Particles.size() - 1].SetAntiParticle(true);
            m_PDGtoID[pdgid] = m_Particles.size() - 1;
          }
        }
      }
    }
  }
 
  void ThermalParticleSystem::SetTableFromVector(const std::vector<ThermalParticle>& part_in, bool GenerateAntiParticles)
  {
    m_Particles.resize(0);
 
    for (size_t i = 0; i < part_in.size(); ++i) {
      const ThermalParticle &part = part_in[i];
      if (!GenerateAntiParticles) {
        m_Particles.push_back(part);
      }
      else if (part.PdgId() > 0) {
        m_Particles.push_back(part);
 
        if (!part.IsNeutral()) {
          m_Particles.push_back(part.GenerateAntiParticle());
        }
      }
    }
 
    FinalizeList();
 
    if (GenerateAntiParticles) {
      for (size_t i = 0; i < m_Particles.size(); ++i) {
        if (m_Particles[i].IsAntiParticle() && PdgToId(-m_Particles[i].PdgId()) != -1) {
          m_Particles[i].SetDecays(GetDecaysFromAntiParticle(m_Particles[PdgToId(-m_Particles[i].PdgId())].Decays()));
        }
      }
    }
 
    FinalizeDecaysLoad();
 
    FillDecayProperties();
    FillDecayThresholds();
    ProcessDecays();
  }
 
  void ThermalParticleSystem::WriteTableToFile(const std::string& OutputFile, bool WriteAntiParticles)
  {
    std::ofstream fout(OutputFile.c_str());
    if (fout.is_open()) {
      fout << "#"
        << std::setw(14) << "pdgid"
        << std::setw(20) << "name"
        << std::setw(15) << "stable"
        << std::setw(15) << "mass[GeV]"
        << std::setw(15) << "degeneracy"
        << std::setw(15) << "statistics"
        << std::setw(15) << "B"
        << std::setw(15) << "Q"
        << std::setw(15) << "S"
        << std::setw(15) << "C"
        << std::setw(15) << "|S|"
        << std::setw(15) << "|C|"
        << std::setw(15) << "width[GeV]"
        << std::setw(15) << "threshold[GeV]"
        << std::endl;
 
      for (size_t i = 0; i < m_Particles.size(); ++i) {
        const ThermalParticle& part = m_Particles[i];
        if (part.PdgId() < 0 && !WriteAntiParticles)
          continue;
 
        fout << std::setw(15) << part.PdgId()
          << std::setw(20) << part.Name()
          << std::setw(15) << static_cast<int>(part.IsStable())
          << std::setw(15) << part.Mass()
          << std::setw(15) << part.Degeneracy()
          << std::setw(15) << part.Statistics()
          << std::setw(15) << part.BaryonCharge()
          << std::setw(15) << part.ElectricCharge()
          << std::setw(15) << part.Strangeness()
          << std::setw(15) << part.Charm()
          << std::setw(15) << part.AbsoluteStrangeness()
          << std::setw(15) << part.AbsoluteCharm()
          << std::setw(15) << part.ResonanceWidth()
          << std::setw(15) << part.DecayThresholdMass()
          << std::endl;
      }
      fout.close();
    }
  }
 
  void ThermalParticleSystem::LoadDecays(const std::vector<std::string>& DecayFiles, const std::set<std::string>& flags)
  {
    for (size_t i = 0; i < m_Particles.size(); ++i)
      m_Particles[i].ClearDecays();
 
    for (size_t i = 0; i < DecayFiles.size(); ++i) {
      ifstream fin(DecayFiles[i].c_str());
 
      if (fin.is_open()) {
 
        char tmpc[2000];
        fin.getline(tmpc, 2000);
        string tmp = string(tmpc);
        vector<string> elems = CuteHRGHelper::split(tmp, '#');
 
        int flnew = 0;
        if (tmp.size() == 0 || elems.size() >= 2)
          flnew = 1;
        else
          flnew = 0;
 
        fin.clear();
        fin.seekg(0, ios::beg);
 
        if (flnew == 1)
          ReadDecays_NewFormat(fin);
        else
          ReadDecays_OldFormat(fin);
 
        fin.close();
 
      }
 
    }
 
    if (flags.count(ThermalParticleSystem::flag_no_antiparticles) == 0) {
      for (size_t i = 0; i < m_Particles.size(); ++i) {
        if (m_Particles[i].PdgId() < 0)
          m_Particles[i].SetDecays(GetDecaysFromAntiParticle(m_Particles[m_PDGtoID[-m_Particles[i].PdgId()]].Decays()));
      }
    }
 
    FinalizeDecaysLoad();
  }
 
  void ThermalParticleSystem::LoadDecays(const std::string& DecaysFile, bool GenerateAntiParticles)
  {
    std::set<std::string> flags;
    if (!GenerateAntiParticles)
      flags.insert(ThermalParticleSystem::flag_no_antiparticles);
 
    LoadDecays(vector<string>(1, DecaysFile), flags);
  }
 
  void ThermalParticleSystem::ReadDecays_NewFormat(std::ifstream & fin)
  {
    vector< ThermalParticle::ParticleDecaysVector > decays(0);
    map<long long, int> decaymap;
    decaymap.clear();
 
    
    if (fin.is_open()) {
      char cc[2000];
      int index = 0;
      while (!fin.eof()) {
        fin.getline(cc, 2000);
        string tmp = string(cc);
        vector<string> elems = CuteHRGHelper::split(tmp, '#');
        if (elems.size() < 1 || elems[0].size() == 0)
          continue;
 
        int tdecaysnumber = 0;
        long long tpdgid = 0;
        ThermalParticle::ParticleDecaysVector tdecays(0);
 
        istringstream iss(elems[0]);
        if (!(iss >> tpdgid)) continue;
 
        {
          bool fl = false;
          while (!fl) {
            if (fin.eof()) break;
            fin.getline(cc, 500);
            tmp = string(cc);
            elems = CuteHRGHelper::split(tmp, '#');
            if (elems.size() < 1 || elems[0].size() == 0)
              continue;
 
            istringstream isstnum(elems[0]);
            if (!(isstnum >> tdecaysnumber)) {
              tdecaysnumber = 0;
              continue;
            }
            fl = true;
          }
        }
 
        for (int i = 0; i < tdecaysnumber; ++i) {
          bool fl = false;
          while (!fl) {
            if (fin.eof()) break;
            fin.getline(cc, 500);
            tmp = string(cc);
            elems = CuteHRGHelper::split(tmp, '#');
            if (elems.size() < 1 || elems[0].size() == 0)
              continue;
 
            ParticleDecayChannel tdecay;
            istringstream issdec(elems[0]);
            if (!(issdec >> tdecay.mBratio)) continue;
            long long tmpid;
            while (issdec >> tmpid) {
              tdecay.mDaughters.push_back(tmpid);
            }
            tdecays.push_back(tdecay);
            fl = true;
          }
        }
 
        if (static_cast<int>(tdecays.size()) == tdecaysnumber && static_cast<int>(tdecays.size()) != 0) {
          decays.push_back(tdecays);
          decaymap[tpdgid] = index;
          index++;
        }
      }
 
      for (size_t i = 0; i < m_Particles.size(); ++i) {
        if (decaymap.count(m_Particles[i].PdgId()) != 0)
          m_Particles[i].SetDecays(decays[decaymap[m_Particles[i].PdgId()]]);
      }
    }
  }
 
  void ThermalParticleSystem::Initialize(const std::vector<std::string>& ListFiles, const std::vector<std::string>& DecayFiles, const std::set<std::string>& flags, double mcut)
  {
    if (!Disclaimer::DisclaimerPrinted)
      Disclaimer::DisclaimerPrinted = Disclaimer::PrintDisclaimer();
 
    m_NumberOfParticles = 0;
    m_Particles.resize(0);
    m_PDGtoID.clear();
    m_ResonanceWidthShape = ThermalParticle::RelativisticBreitWigner;
    m_ResonanceWidthIntegrationType = ThermalParticle::ZeroWidth;
 
    m_SortMode = ThermalParticleSystem::SortByMass;
 
    m_MaxDecayDistributionsSize = 8000;
 
    m_DecayContributionsByFeeddown.resize(Feeddown::NumberOfTypes);
 
    SetResonanceWidthShape(ThermalParticle::RelativisticBreitWigner);
    SetResonanceWidthIntegrationType(ThermalParticle::ZeroWidth);
    SetCalculationType(IdealGasFunctions::Quadratures);
 
    LoadList(ListFiles, DecayFiles, flags, mcut);
  }
 
  void ThermalParticleSystem::Initialize(const std::string& InputFile, const std::string& DecayFile, bool GenAntiP, double mcut)
  {
    std::set<std::string> flags;
    if (!GenAntiP)
      flags.insert(ThermalParticleSystem::flag_no_antiparticles);
    Initialize(vector<string>(1, InputFile), vector<string>(1, DecayFile), flags, mcut);
  }
 
  void ThermalParticleSystem::FinalizeListLoad()
  {
    SetResonanceWidthShape(m_ResonanceWidthShape);
    SetResonanceWidthIntegrationType(m_ResonanceWidthIntegrationType);
    SetCalculationType(m_QStatsCalculationType);
 
    CheckDecayChannelsAreSpecified();
    CheckAbsoluteQuarkNumbers();
  }
 
  void ThermalParticleSystem::FinalizeDecaysLoad()
  {
    for (size_t i = 0; i < m_Particles.size(); ++i)
      m_Particles[i].SetDecaysOriginal(m_Particles[i].Decays());
 
    FillDecayProperties();
    FillDecayThresholds();
    ProcessDecays();
  }
 
  bool ThermalParticleSystem::CheckListIsiSS(const std::string& filename)
  {
    ifstream fin(filename.c_str());
    if (fin.is_open()) {
      string tmp;
      fin >> tmp;
      return (tmp == "iSS");
    }
    return false;
  }
 
  void ThermalParticleSystem::LoadListiSS(const std::string& filename, const std::set<std::string>& flags, double mcut)
  {
    m_NumberOfParticles = 0;
    m_Particles.resize(0);
    m_PDGtoID.clear();
 
    m_NumBaryons = m_NumCharged = m_NumStrange = m_NumCharmed = 0;
    m_MaxAbsBaryonNumber = 0;
 
    ifstream fin(filename.c_str());
 
    if (fin.is_open()) {
      char cc[2000];
      // Skip the header line
      fin.getline(cc, 2000);
      // Read all the particles
      while (!fin.eof()) {
        fin.getline(cc, 2000);
        string tmp = string(cc);
        vector<string> elems = CuteHRGHelper::split(tmp, '#');
        if (elems.size() < 1 || elems[0].size() == 0)
          continue;
 
        istringstream iss(elems[0]);
 
        int stable, stat, str, bary, chg, charm, itmp, tdecaynumber;
        long long pdgid, ltmp;
        double mass, degeneracy, width, threshold, abss, absc;
        string name;
 
        if (iss >> pdgid
          >> name
          >> mass
          >> width
          >> degeneracy
          >> bary
          >> str
          >> charm
          >> itmp
          >> itmp
          >> chg
          >> tdecaynumber
          ) {
 
          stable = 0;
          abss = std::abs(str);
          if (pdgid == 333)
            abss = 2.;
          absc = std::abs(charm);
          threshold = 0.;
          stat = (std::abs(bary) % 2 == 0 ? -1 : 1);
 
          ThermalParticle part_candidate = ThermalParticle(
            (bool)stable, name, pdgid, degeneracy, stat, mass, str, bary, chg, abss, width, threshold, charm, absc);
 
          if (pdgid < 0)
            part_candidate.SetAntiParticle(true);
 
          if (!AcceptParticle(part_candidate, flags, mcut) || m_PDGtoID.count(pdgid) != 0)
            continue;
 
          if (bary != 0)  m_NumBaryons++;
          if (chg != 0)   m_NumCharged++;
          if (str != 0)   m_NumStrange++;
          if (charm != 0) m_NumCharmed++;
          m_MaxAbsBaryonNumber = max(m_MaxAbsBaryonNumber, abs(bary));
 
          m_Particles.push_back(part_candidate);
          m_PDGtoID[pdgid] = m_Particles.size() - 1;
          m_NumberOfParticles++;
 
          // now read the decays
          ThermalParticle::ParticleDecaysVector tdecays(0);
          for (size_t idec = 0; idec < tdecaynumber; ++idec) {
            fin.getline(cc, 2000);
            string tmp = string(cc);
            elems = CuteHRGHelper::split(tmp, '#');
            istringstream issdec(elems[0]);
 
            ParticleDecayChannel tdecay;
            issdec >> ltmp;
            int ndecayparticles;
            double BR;
            issdec >> ndecayparticles >> tdecay.mBratio;
            for (size_t idaughter = 0; idaughter < 5; ++idaughter) {
              issdec >> ltmp;
              if (idaughter < ndecayparticles)
                tdecay.mDaughters.push_back(ltmp);
            }
            tdecays.push_back(tdecay);
          }
 
          if (static_cast<int>(tdecays.size()) == tdecaynumber 
            && static_cast<int>(tdecays.size()) != 0
            && tdecays[0].mDaughters.size() != 1) {
            m_Particles.back().SetDecays(tdecays);
          }
          else {
            stable = 1;
            m_Particles.back().SetStable(true);
          }
 
          // Add antibaryon
          if (bary > 0 && (m_PDGtoID.count(-pdgid) == 0)) {
 
            if (bary != 0)  m_NumBaryons++;
            if (chg != 0)   m_NumCharged++;
            if (str != 0)   m_NumStrange++;
            if (charm != 0) m_NumCharmed++;
 
            if (bary == 0 && name[name.size() - 1] == '+')
              name[name.size() - 1] = '-';
            else if (bary == 0 && name[name.size() - 1] == '-')
              name[name.size() - 1] = '+';
            else
              name = "anti-" + name;
            m_Particles.push_back(ThermalParticle((bool)stable, name, -pdgid, degeneracy, stat, mass, -str, -bary, -chg, abss, width, threshold, -charm, absc));
            m_Particles.back().SetAntiParticle(true);
            m_PDGtoID[pdgid] = m_Particles.size() - 1;
          }
 
        }
      }
 
      FinalizeList();
 
      for (size_t i = 0; i < m_Particles.size(); ++i) {
        if (m_Particles[i].BaryonCharge() < 0)
          m_Particles[i].SetDecays(GetDecaysFromAntiParticle(m_Particles[m_PDGtoID[-m_Particles[i].PdgId()]].Decays()));
      }
 
      FinalizeDecaysLoad();
 
      FinalizeListLoad();
    }
  }
 
  void ThermalParticleSystem::WriteDecaysToFile(const std::string& OutputFile, bool WriteAntiParticles)
  {
    std::ofstream fout(OutputFile.c_str());
    if (fout.is_open()) {
      fout << "# the list of decays" << std::endl;
      fout << "# each entry consists of the following:" << std::endl;
      fout << "# a line with the pdgid of decaying particle" << std::endl;
      fout << "# a line with the number of decay channels" << std::endl;
      fout << "# for each channel a line containing whitespace-separated values of the channel branching ratio and pdg ids of the daughter products" << std::endl;
      fout << "# everything after the # symbol is treated as a comment and ignored" << std::endl;
      fout << "# decays of antiparticles are not listed but generated from the listed decays of particles" << std::endl;
      fout << std::endl;
 
      for (unsigned int i = 0; i < m_Particles.size(); ++i) {
        if ((m_Particles[i].PdgId()>0 || WriteAntiParticles) && m_Particles[i].Decays().size()>0) {
          fout << std::left << std::setw(36) << m_Particles[i].PdgId();
          fout << " # " << m_Particles[i].Name() << std::endl;
 
          fout << std::left << std::setw(36) << m_Particles[i].Decays().size();
          fout << " # " << m_Particles[i].Decays().size() << " decay channel";
          if (m_Particles[i].Decays().size() % 10 != 1 || m_Particles[i].Decays().size() % 100 == 11) fout << "s";
          fout << std::endl;
 
          for (unsigned int j = 0; j < m_Particles[i].Decays().size(); ++j) {
            fout << std::left << std::setw(15) << m_Particles[i].Decays()[j].mBratio << " ";
            std::ostringstream oss;
            for (unsigned int k = 0; k < m_Particles[i].Decays()[j].mDaughters.size(); ++k) {
              oss << m_Particles[i].Decays()[j].mDaughters[k];
              if (k != m_Particles[i].Decays()[j].mDaughters.size() - 1)
                oss << " ";
            }
            fout << std::left << std::setw(20) << oss.str();
            fout << " # " << m_Particles[i].Name() << " -> ";
            for (unsigned int k = 0; k < m_Particles[i].Decays()[j].mDaughters.size(); ++k) {
              if (m_PDGtoID.count(m_Particles[i].Decays()[j].mDaughters[k]) == 0) {
                //if (m_Particles[i].Decays()[j].mDaughters[k] == 22) fout << "?gamma?";
                long long tpdg = m_Particles[i].Decays()[j].mDaughters[k];
                if (ExtraParticles::PdgToId(tpdg) != -1)
                  fout << ExtraParticles::ParticleByPdg(tpdg).Name();
                else fout << "???";
              }
              else
                fout << m_Particles[m_PDGtoID[m_Particles[i].Decays()[j].mDaughters[k]]].Name();
              if (k != m_Particles[i].Decays()[j].mDaughters.size() - 1)
                fout << " + ";
            }
            fout << std::endl;
          }
          fout << std::endl;
        }
      }
 
      fout.close();
    }
  }
 
  void ThermalParticleSystem::ReadDecays_OldFormat(std::ifstream & fin)
  {
    vector< ThermalParticle::ParticleDecaysVector > decays(0);
    vector<long long> pdgids(0);
    map<long long, int> decaymap;
    decaymap.clear();
 
    if (fin.is_open()) {
      int decaypartnumber = 0;
      fin >> decaypartnumber;
      decays.reserve(decaypartnumber);
 
      for (int i = 0; i < decaypartnumber; ++i) {
        int decaysnumber, daughters;
        long long pdgid, tmpid;
        double bratio;
        fin >> pdgid >> decaysnumber;
        decaymap[pdgid] = i;
        decays.push_back(ThermalParticle::ParticleDecaysVector(0));
        pdgids.push_back(pdgid);
        for (int j = 0; j < decaysnumber; ++j) {
          ParticleDecayChannel decay;
          fin >> bratio;
          decay.mBratio = bratio / 100.;
          fin >> daughters;
          decay.mDaughters.reserve(daughters);
          for (int k = 0; k < daughters; ++k) {
            fin >> tmpid;
            decay.mDaughters.push_back(tmpid);
          }
          decays[i].push_back(decay);
        }
      }
    }
 
    for (size_t i = 0; i < m_Particles.size(); ++i) {
      if (decaymap.count(m_Particles[i].PdgId()) != 0)
        m_Particles[i].SetDecays(decays[decaymap[m_Particles[i].PdgId()]]);
    }
 
  }
 
  std::string ThermalParticleSystem::GetNameFromPDG(long long pdgid) {
    if (m_PDGtoID.count(pdgid) != 0)
      return m_Particles[m_PDGtoID[pdgid]].Name();
    if (pdgid == 1) return string("Npart");
    if (pdgid == 310) return string("K0S");
    if (pdgid == 130) return string("K0L");
    if (pdgid % 10 == 0) {
      long long tpdgid = pdgid / 10;
      if (PdgToId(tpdgid) != -1 && PdgToId(-tpdgid) != -1)
        return m_Particles[PdgToId(tpdgid)].Name() + "+" + m_Particles[PdgToId(-tpdgid)].Name();
    }
    if (pdgid == 22122112) return string("p+n");
 
    return ExtraParticles::NameByPdg(pdgid);
 
    //return string("???");
  }
 
  void ThermalParticleSystem::NormalizeBranchingRatios() {
    for (size_t i = 0; i < m_Particles.size(); ++i) m_Particles[i].NormalizeBranchingRatios();
    ProcessDecays();
  }
 
 
  void ThermalParticleSystem::RestoreBranchingRatios() {
    for (size_t i = 0; i < m_Particles.size(); ++i) m_Particles[i].RestoreBranchingRatios();
    ProcessDecays();
  }
 
  void ThermalParticleSystem::SetCalculationType(IdealGasFunctions::QStatsCalculationType type)
  {
    m_QStatsCalculationType = type;
    for (size_t i = 0; i < m_Particles.size(); ++i)
      m_Particles[i].SetCalculationType(type);
  }
 
  void ThermalParticleSystem::SetClusterExpansionOrder(int order)
  {
    for (size_t i = 0; i < m_Particles.size(); ++i)
      m_Particles[i].SetClusterExpansionOrder(order);
  }
 
  void ThermalParticleSystem::SetResonanceWidthShape(ThermalParticle::ResonanceWidthShape shape)
  {
    m_ResonanceWidthShape = shape;
    for (size_t i = 0; i < m_Particles.size(); ++i)
      m_Particles[i].SetResonanceWidthShape(shape);
  }
 
  void ThermalParticleSystem::SetResonanceWidthIntegrationType(ThermalParticle::ResonanceWidthIntegration type)
  {
    bool dodecays = (type != m_ResonanceWidthIntegrationType);
 
    m_ResonanceWidthIntegrationType = type;
 
    for (size_t i = 0; i < m_Particles.size(); ++i) {
      if (!m_Particles[i].ZeroWidthEnforced())
        m_Particles[i].SetResonanceWidthIntegrationType(type);
    }
 
    if (dodecays)
      ProcessDecays();
  }
 
  const ThermalParticle & ThermalParticleSystem::Particle(int id) const
  {
    if (id < 0 || id >= static_cast<int>(m_Particles.size())) {
      throw std::out_of_range("ThermalParticleSystem::Particle(int id): id is out of bounds!");
    }
    return m_Particles[id];
  }
 
  ThermalParticle & ThermalParticleSystem::Particle(int id)
  {
    if (id < 0 || id >= static_cast<int>(m_Particles.size())) {
      throw std::out_of_range("ThermalParticleSystem::Particle(int id): id is out of bounds!");
    }
    return m_Particles[id];
  }
 
  const ThermalParticle & ThermalParticleSystem::ParticleByPDG(long long pdgid) const
  {
    int id = PdgToId(pdgid);
    if (id == -1) {
      throw std::invalid_argument("ThermalParticleSystem::ParticleByPDG(long long pdgid): pdgid " + std::to_string(pdgid) + " is unknown");
    }
    return m_Particles[id];
  }
 
  ThermalParticle & ThermalParticleSystem::ParticleByPDG(long long pdgid)
  {
    int id = PdgToId(pdgid);
    if (id == -1) {
      throw std::invalid_argument("ThermalParticleSystem::ParticleByPDG(long long pdgid): pdgid " + std::to_string(pdgid) + " is unknown");
    }
    return m_Particles[id];
  }
 
  int ThermalParticleSystem::PdgToId(long long pdgid) const
  {
    map<long long, int>::const_iterator it = m_PDGtoID.find(pdgid);
 
    if (it != m_PDGtoID.end()) {
      return it->second;
    }
    else {
      return -1;
    }
  }
 
  void ThermalParticleSystem::FillPdgMap()
  {
    m_NumBaryons = m_NumCharged = m_NumStrange = m_NumCharmed = 0;
    m_MaxAbsBaryonNumber = 0;
    m_NumberOfParticles = 0;
    m_PDGtoID.clear();
    for (size_t i = 0; i < m_Particles.size(); ++i) {
      m_PDGtoID[m_Particles[i].PdgId()] = i;
      if (m_Particles[i].BaryonCharge() != 0)    m_NumBaryons++;
      if (m_Particles[i].ElectricCharge() != 0)  m_NumCharged++;
      if (m_Particles[i].Strangeness() != 0)     m_NumStrange++;
      if (m_Particles[i].Charm() != 0)           m_NumCharmed++;
      if (m_Particles[i].PdgId() > 0)            m_NumberOfParticles++;
      m_MaxAbsBaryonNumber = max(m_MaxAbsBaryonNumber, abs(m_Particles[i].BaryonCharge()));
    }
 
    for (size_t i = 0; i < m_DecayContributionsByFeeddown.size(); ++i)
      m_DecayContributionsByFeeddown[i].resize(m_Particles.size());
  }
 
  void ThermalParticleSystem::FinalizeList()
  {
    if (SortMode() == ThermalParticleSystem::SortByMass)
      sort(m_Particles.begin(), m_Particles.end(), cmpParticleMass);
    else if (SortMode() == ThermalParticleSystem::SortByMassAndPDG)
      sort(m_Particles.begin(), m_Particles.end(), cmpParticleMassAndPdg);
    else
      sort(m_Particles.begin(), m_Particles.end(), cmpParticlePDG);
    FillPdgMap();
    for (size_t i = 0; i < m_Particles.size(); ++i) {
      if (m_Particles[i].DecayType() == ParticleDecayType::Default)
        m_Particles[i].SetDecayType( DecayTypeByParticleType(m_Particles[i]) );
    }
  }
 
  void ThermalParticleSystem::AddParticle(const ThermalParticle & part)
  {
    m_Particles.push_back(part);
    FillPdgMap();
  }
 
  void ThermalParticleSystem::RemoveParticleAt(int ind)
  {
    if (ind >= 0 && ind < static_cast<int>(m_Particles.size())) {
      m_Particles.erase(m_Particles.begin() + ind);
      FillPdgMap();
    }
  }
 
  bool ThermalParticleSystem::CheckDecayChargesConservation(int ind) const
  {
    std::vector<int> check = CheckDecayChargesConservationVector(ind);
    for (int i = 0; i < check.size(); ++i)
      if (check[i] != 1)
        return false;
    return true;
  }
 
  bool ThermalParticleSystem::CheckDecayChannelsAreSpecified() const
  {
    bool ret = true;
    int cnt = 0;
    for (int i = 0; i < Particles().size(); ++i) {
      const ThermalParticle& part = Particles()[i];
      if (!part.IsStable() && part.Decays().size() == 0 && cnt < 10) {
        printf("**WARNING** %s (%lld): Particle marked unstable but no decay channels found!\n",
          part.Name().c_str(),
          part.PdgId());
        ret = false;
        cnt++;
        if (cnt == 10) {
          // throw std::runtime_error("**WARNING** Further warnings are discarded...");
          printf("**WARNING** Further warnings are discarded...\n");
        }
      }
    }
    return ret;
  }
 
  bool ThermalParticleSystem::CheckAbsoluteQuarkNumbers() const
  {
    bool ret = true;
    for (int i = 0; i < Particles().size(); ++i) {
      const ThermalParticle& part = Particles()[i];
      if (part.AbsoluteStrangeness() == 0 && part.Strangeness() != 0) {
        std::cerr << "**WARNING** " << part.Name() << " (" << part.PdgId() << "): Particle with non-zero strangeness has zero strange quark content |s|!" << std::endl;
        ret = false;
      }
 
      if (part.AbsoluteCharm() == 0 && part.Charm() != 0) {
        std::cerr << "**WARNING** " << part.Name() << " (" << part.PdgId() << "): Particle with non-zero charm has zero charm quark content |s|!" << std::endl;
        ret = false;
      }
    }
    return ret;
  }
 
  std::vector<int> ThermalParticleSystem::CheckDecayChargesConservationVector(int ind) const
  {
    const ThermalParticle& part = Particles()[ind];
    int goalB = part.BaryonCharge();
    int goalQ = part.ElectricCharge();
    int goalS = part.Strangeness();
    int goalC = part.Charm();
 
    std::map<long long, int> tPDGtoID = m_PDGtoID;
 
    std::vector<int> ret(4, 1);
 
    for (size_t i = 0; i < part.Decays().size(); ++i) {
      int decB = 0, decQ = 0, decS = 0, decC = 0;
      for (size_t j = 0; j < part.Decays()[i].mDaughters.size(); ++j) {
        long long tpdg = part.Decays()[i].mDaughters[j];
        if (tPDGtoID.count(tpdg) != 0) {
          int tid = tPDGtoID[tpdg];
          decB += Particles()[tid].BaryonCharge();
          decQ += Particles()[tid].ElectricCharge();
          decS += Particles()[tid].Strangeness();
          decC += Particles()[tid].Charm();
        }
        else if (ExtraParticles::PdgToId(tpdg) != -1) {
          int tid = ExtraParticles::PdgToId(tpdg);
          decB += ExtraParticles::Particle(tid).BaryonCharge();
          decQ += ExtraParticles::Particle(tid).ElectricCharge();
          decS += ExtraParticles::Particle(tid).Strangeness();
          decC += ExtraParticles::Particle(tid).Charm();
        }
      }
 
      if (goalB != decB)
        ret[0] = 0;
      if (goalQ != decQ)
        ret[1] = 0;
      if (goalS != decS)
        ret[2] = 0;
      if (goalC != decC)
        ret[3] = 0;
    }
 
    return ret;
  }
 
  bool ThermalParticleSystem::operator==(const ThermalParticleSystem & rhs) const
  {
    bool ret = true;
    ret &= m_PDGtoID == rhs.m_PDGtoID;
    ret &= m_NumBaryons == rhs.m_NumBaryons;
    ret &= m_NumCharged == rhs.m_NumCharged;
    ret &= m_NumStrange == rhs.m_NumStrange;
    ret &= m_NumCharmed == rhs.m_NumCharmed;
    ret &= m_MaxAbsBaryonNumber == rhs.m_MaxAbsBaryonNumber;
    ret &= m_NumberOfParticles == rhs.m_NumberOfParticles;
    ret &= m_ResonanceWidthIntegrationType == rhs.m_ResonanceWidthIntegrationType;
    ret &= m_DecayDistributionsMap == rhs.m_DecayDistributionsMap;
 
    ret &= m_Particles == rhs.m_Particles;
 
    return ret;
  }
 
  ParticleDecayType::DecayType ThermalParticleSystem::DecayTypeByParticleType(const ThermalParticle &part)
  {
    // Check if it's a known stable (wrt to any time scale of relevance) particle
    set<long long> stablePDG;
    stablePDG.insert(2212); stablePDG.insert(-2212); // proton
    stablePDG.insert(2112); stablePDG.insert(-2112); // neutron
    stablePDG.insert(1000010020); stablePDG.insert(-1000010020); // deuteron
    stablePDG.insert(1000020030); stablePDG.insert(-1000020030); // He3
    stablePDG.insert(1000010030); stablePDG.insert(-1000010030); // triton
    stablePDG.insert(1000020040); stablePDG.insert(-1000020040); // He4
 
    if (stablePDG.count(part.PdgId()) > 0) {
      return ParticleDecayType::Stable;
    }
    
    // Check if it's a known weakly decaying particle
    set<long long> weakPDG;
    weakPDG.insert(310); // K0S
    weakPDG.insert(130); // K0L
    weakPDG.insert(211); weakPDG.insert(-211);    // pi+-
    weakPDG.insert(321); weakPDG.insert(-321);    // K+-
    weakPDG.insert(3122); weakPDG.insert(-3122);  // Lambda
    weakPDG.insert(3222); weakPDG.insert(-3222);  // Sigma+
    weakPDG.insert(3112); weakPDG.insert(-3112);  // Sigma-
    weakPDG.insert(3322); weakPDG.insert(-3322);  // Ksi0
    weakPDG.insert(3312); weakPDG.insert(-3312);  // Ksi-
    weakPDG.insert(3334); weakPDG.insert(-3334);  // Omega
    weakPDG.insert(411); weakPDG.insert(-411);    // D+-
    weakPDG.insert(421); weakPDG.insert(-421);    // D0
    weakPDG.insert(431); weakPDG.insert(-431);    // Ds
    weakPDG.insert(4232); weakPDG.insert(-4232);  // Ksic+
    weakPDG.insert(4132); weakPDG.insert(-4132);  // Ksic0
    weakPDG.insert(4422); weakPDG.insert(-4422);  // Ksicc++
    weakPDG.insert(4412); weakPDG.insert(-4412);  // Ksicc+
    weakPDG.insert(4332); weakPDG.insert(-4332);  // Omegac
 
    if (weakPDG.count(part.PdgId()) > 0) {
      return ParticleDecayType::Weak;
    }
 
    // Check if it's a known electromagnetically decaying particle
    // Note: we treat eta decay as "electromagnetic" although some of them are in fact isospin-invariance breaking strong decays
    set<long long> emPDG;
    emPDG.insert(111); // pi0
    emPDG.insert(221); // eta
    emPDG.insert(331); // eta'
    emPDG.insert(3212); emPDG.insert(-3212); // Sigma0
 
    if (emPDG.count(part.PdgId()) > 0) {
      return ParticleDecayType::Electromagnetic;
    }
 
    if (!part.IsStable()) // if particle not marked as stable assume it at least decays strongly
    {
      return ParticleDecayType::Strong;
    }
    else {
      // if contains strangeness (or charm), it is not stable under weak decays
      if (part.AbsoluteStrangeness() != 0 || part.AbsoluteCharm() != 0)
        return ParticleDecayType::Weak;
 
      return ParticleDecayType::Stable;
    }
 
 
    return ParticleDecayType::Default;
  }
 
  void ThermalParticleSystem::FillResonanceDecaysByFeeddown() {
    m_DecayContributionsByFeeddown[Feeddown::Weak].resize(m_Particles.size());
    m_DecayContributionsByFeeddown[Feeddown::Electromagnetic].resize(m_Particles.size());
    m_DecayContributionsByFeeddown[Feeddown::Strong].resize(m_Particles.size());
    for (size_t i = 0; i < m_Particles.size(); ++i) {
      m_DecayContributionsByFeeddown[Feeddown::Weak][i].resize(0);
      m_DecayContributionsByFeeddown[Feeddown::Electromagnetic][i].resize(0);
      m_DecayContributionsByFeeddown[Feeddown::Strong][i].resize(0);
    }
    for (int i = static_cast<int>(m_Particles.size()) - 1; i >= 0; i--)
      if (m_Particles[i].DecayType() != ParticleDecayType::Stable && m_Particles[i].DecayType() != ParticleDecayType::Default) {
        GoResonanceByFeeddown(i, i, 1., Feeddown::Type(static_cast<int>(m_Particles[i].DecayType())));
      }
  }
 
  void ThermalParticleSystem::GoResonanceByFeeddown(int ind, int startind, double BR, Feeddown::Type feeddown) {
    for (int feed_index = static_cast<int>(Feeddown::Weak); feed_index <= static_cast<int>(Feeddown::Strong); ++feed_index) {
      if (static_cast<int>(feeddown) < feed_index) continue;
      //std::vector< std::pair<double, int> >& decayContributions = m_Particles[ind].DecayContributionsByFeeddown()[feed_index];
      DecayContributionsToParticle& decayContributions = m_DecayContributionsByFeeddown[feed_index][ind];
      if (ind != startind && decayContributions.size() > 0 && decayContributions[decayContributions.size() - 1].second == startind)
      {
        decayContributions[decayContributions.size() - 1].first += BR;
      }
      else if (ind != startind) {
        decayContributions.push_back(make_pair(BR, startind));
      }
    }
 
   
    if (m_Particles[ind].DecayType() != ParticleDecayType::Stable && m_Particles[ind].DecayType() != ParticleDecayType::Default) {
      for (size_t i = 0; i < m_Particles[ind].Decays().size(); ++i) {
        const ParticleDecayChannel& decaychannel = m_Particles[ind].Decays()[i];
        double tbr = decaychannel.mBratio;
 
        if (m_ResonanceWidthIntegrationType == ThermalParticle::eBW && ind == startind)
          tbr = decaychannel.mBratioAverage;
 
        for (size_t j = 0; j < decaychannel.mDaughters.size(); ++j) {
          if (m_PDGtoID.count(decaychannel.mDaughters[j]) != 0)
            GoResonanceByFeeddown(m_PDGtoID[decaychannel.mDaughters[j]], startind, BR*tbr, Feeddown::Type(static_cast<int>(m_Particles[ind].DecayType())));
        }
      }
    }
  }
 
  std::vector<double> ThermalParticleSystem::GetConservedChargesVector(ConservedCharge::Name charge) {
    std::vector<double> ret(ComponentsNumber(), 0.);
    for (size_t i = 0; i < m_Particles.size(); ++i) {
      ret[i] = static_cast<double>(m_Particles[i].ConservedCharge(charge));
    }
    return ret;
  }
 
 
  namespace CuteHRGHelper {
    std::vector<std::string>& split(const std::string& s, char delim, std::vector<std::string>& elems) {
      std::stringstream ss(s);
      std::string item;
      while (std::getline(ss, item, delim)) {
        elems.push_back(item);
      }
      return elems;
    }
 
    std::vector<std::string> split(const std::string& s, char delim) {
      std::vector<std::string> elems;
      split(s, delim, elems);
      return elems;
    }
 
    void cutDecayDistributionsVector(std::vector< std::pair<double, std::vector<int> > >& vect, int maxsize)
    {
      if (static_cast<int>(vect.size()) > maxsize) {
        std::sort(vect.begin(), vect.end());
        std::reverse(vect.begin(), vect.end());
        vect.resize(maxsize);
      }
    }
  }
 
  namespace DecayLifetimes {
    // lifetimes from pdg in seconds
    map<long long, double> lifetimes = {
            {211, 2.6033e-8}, // pi+-
            {111, 8.43e-17}, // pi0
            {321, 1.238e-8}, // K+-
            {310, 8.954e-11}, // K0S
            {130, 5.116e-8}, // K0L
            {411, 1.033e-12}, // D+-
            {421, 4.103e-13}, // D0
            {431, 5.012e-13}, // Ds+-
            {2112, 878.4}, // n
            {3122, 2.617e-10}, // Lambda
            {3222, 8.018e-11}, // Sigma+
            {3212, 74.e-21}, // Sigma0
            {3112, 1.479e-10}, // Sigma-
            {3322, 2.9e-10}, // Xi0
            {3312, 1.639e-10}, // Xi-
            {3334, 8.21e-11} // Omega-
            // TODO: Charmed baryons and hypernuclei
    };
 
    // resonance widths in GeV
    map<long long, double> widths = {
          {221, 1.31e-6} // eta
    };
 
    double GetLifetime(long long pdg) {
      if (lifetimes.count(abs(pdg)))
        return lifetimes[abs(pdg)] * 1.e15;
 
      if (widths.count(abs(pdg))) {
        double width = widths[abs(pdg)];
        double ctau = 1. / (width * xMath::GeVtoifm());
        return ctau;
      }
 
      // No entry found, return zero
      return 0.;
    }
  }
} // namespace thermalfist