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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/ChargedFinalState.hh"
#include "Rivet/Projections/CentralityProjection.hh"
#include "Rivet/Projections/AliceCommon.hh"
#include "Rivet/Tools/AliceCommon.hh"
namespace Rivet {
/// @brief Strangeness enhancement in pp 7 TeV by ALICE.
class ALICE_2016_I1471838 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(ALICE_2016_I1471838);
int profileIndex(vector<double> cBins, double c) {
int index = 100;
if (c > 0 && c <= cBins[0]) return cBins.size() - 1;
for (size_t i = 0; i < cBins.size() - 1; ++i) {
if (c > cBins[i] && c <= cBins[i + 1]) {
index = i;
break;
}
}
return max(0, int(cBins.size() - index - 2));
}
/// Book histograms and initialise projections before the run
void init() {
// Centrality projection.
declareCentrality(ALICE::V0MMultiplicity(),
"ALICE_2015_PPCentrality","V0M","V0M");
// Central primary particles
declare(ChargedFinalState(Cuts::abseta < 1.0),"PP");
declare(ALICE::PrimaryParticles(Cuts::absrap < 0.5),"PPy");
centralityBins = {1.,5.,10.,15.,20., 30., 40., 50., 70., 100.};
centralityBinsOmega = {5.,15.,30.,50.,100.};
// Book histograms
for (int i = 0; i < 10; ++i) {
book(K0SpT[centralityBins[i]], i+1,1,1);
book(LambdapT[centralityBins[i]], i+11,1,1);
book(XipT[centralityBins[i]], i+21,1,1);
book(sow[centralityBins[i]], "sow_" + toString(i));
}
for (int i = 0; i < 5; ++i) {
book(OmegapT[centralityBinsOmega[i]], i+31,1,1);
book(sowOmega[centralityBinsOmega[i]], "sowO_" + toString(i));
}
book(piYield, 40,1,1);
book(pYield, 41,1,1);
book(kYield, 42,1,1);
book(lambdaYield, 43,1,1);
book(xiYield, 44,1,1);
book(omegaYield, 45,1,1);
book(piRebinned, "/piRebinned", refData(45,1,1));
// Make the ratios
book(kpi, 36, 1, 1, true);
book(ppi, 47, 1, 1, true);
book(lpi, 37, 1, 1, true);
book(xpi, 38, 1, 1, true);
book(opi, 39, 1, 1, true);
book(lk, 46, 1, 1, true);
}
/// Perform the per-event analysis
void analyze(const Event& event) {
if (apply<ChargedFinalState>(event,"PP").particles().size() < 1) vetoEvent;
const ALICE::PrimaryParticles& prim = apply<ALICE::PrimaryParticles>(event,"PPy");
const CentralityProjection& cent = apply<CentralityProjection>(event,"V0M");
double c = cent();
// Find the correct histograms
auto kptItr = K0SpT.upper_bound(c);
if (kptItr == K0SpT.end()) return;
auto lptItr = LambdapT.upper_bound(c);
if (lptItr == LambdapT.end()) return;
auto xptItr = XipT.upper_bound(c);
if (xptItr == XipT.end()) return;
auto optItr = OmegapT.upper_bound(c);
if (optItr == OmegapT.end()) return;
// Fill the sow.
auto sowItr = sow.upper_bound(c);
if (sowItr == sow.end()) return;
auto sowOmegaItr = sowOmega.upper_bound(c);
if (sowOmegaItr == sowOmega.end()) return;
sowItr->second->fill();
sowOmegaItr->second->fill();
// Fill the pt histograms and count yields.
int npi = 0, npr = 0, nk = 0;
int nla = 0, nxi = 0, nom = 0;
for (auto p : prim.particles()) {
const double pT = p.pT();
const int pid = abs(p.pid());
if (pid == 211) ++npi;
else if (pid == 2212) ++npr;
else if (pid == 310) {
kptItr->second->fill(pT);
++nk;
}
else if (pid == 3122) {
lptItr->second->fill(pT);
++nla;
}
else if (pid == 3312) {
xptItr->second->fill(pT);
++nxi;
}
else if (pid == 3334) {
optItr->second->fill(pT);
++nom;
}
}
// Fill the profiles of yields.
int index = profileIndex(centralityBins,c);
piYield->fillBin(index, double(npi));
pYield->fillBin(index, double(npr));
kYield->fillBin(index, double(nk));
lambdaYield->fillBin(index, double(nla));
xiYield->fillBin(index, double(nxi));
index = profileIndex(centralityBinsOmega, c);
omegaYield->fillBin(index, double(nom));
piRebinned->fillBin(index,double(npi));
}
/// Normalise histograms etc., after the run
void finalize() {
// Normalize the spectra
for (int i = 0; i < 10; ++i) {
K0SpT[centralityBins[i]]->scaleW(1./sow[centralityBins[i]]->sumW());
XipT[centralityBins[i]]->scaleW(1./sow[centralityBins[i]]->sumW());
LambdapT[centralityBins[i]]->scaleW(1./sow[centralityBins[i]]->sumW());
}
for (int i = 0; i < 5; ++i) {
OmegapT[centralityBinsOmega[i]]->scaleW(1./sowOmega[centralityBinsOmega[i]]->sumW());
}
divide(kYield, piYield, kpi);
kpi->scaleY(2.);
divide(pYield, piYield, ppi);
divide(lambdaYield, piYield, lpi);
divide(xiYield, piYield, xpi);
divide(omegaYield, piRebinned, opi);
divide(lambdaYield, kYield, lk);
lk->scaleY(0.5);
}
//@}
/// @name Histograms
//@{
// Histograms ordered in centrality classes
vector<double> centralityBins;
vector<double> centralityBinsOmega;
// pT spectra
map<double, Histo1DPtr> K0SpT;
map<double, Histo1DPtr> LambdapT;
map<double, Histo1DPtr> XipT;
map<double, Histo1DPtr> OmegapT;
map<double, CounterPtr> sow;
map<double, CounterPtr> sowOmega;
// Total yields
Profile1DPtr piYield;
Profile1DPtr pYield;
Profile1DPtr kYield;
Profile1DPtr lambdaYield;
Profile1DPtr xiYield;
Profile1DPtr omegaYield;
Profile1DPtr piRebinned;
// Ratios
Scatter2DPtr kpi;
Scatter2DPtr ppi;
Scatter2DPtr lpi;
Scatter2DPtr xpi;
Scatter2DPtr opi;
Scatter2DPtr lk;
//@}
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(ALICE_2016_I1471838);
}
|