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[PWGCF] add toy model to phi #16833

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Merged
wenyaCern merged 2 commits into from
Jun 26, 2026
+19 −2
Merged

[PWGCF] add toy model to phi #16833

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f2c19ec
add toy model to phi
Jun 26, 2026
ca873ec
fix for linter
Jun 26, 2026
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21 changes: 19 additions & 2 deletions PWGCF/MultiparticleCorrelations/Tasks/multiharmonicCorrelations.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@

#include <TCollection.h>
#include <TComplex.h>
#include <TF1.h>
#include <TFile.h>
#include <TGrid.h>
#include <TH1.h>
Expand Down Expand Up @@ -114,6 +115,7 @@ struct MultiharmonicCorrelations { // this name is used in lower-case format to
Configurable<bool> cfQA{"cfQA", true, "quality assurance"};
Configurable<bool> cfInitsim{"cfInitsim", false, "init histograms of sim"};
Configurable<bool> cfUseWeights{"cfUseWeights", true, "use weights"};
Configurable<bool> cfToyModel{"cfToyModel", true, "phi-distribution from toy model"};

Configurable<std::vector<float>> cfVertexZ{"cfVertexZ", {-10, 10.}, "vertex z position range: {min, max}[cm], with convention: min <= Vz < max"};
Configurable<std::vector<float>> cfPt{"cfPt", {0.2, 5.0}, "transverse momentum range"};
Expand Down Expand Up @@ -399,6 +401,16 @@ struct MultiharmonicCorrelations { // this name is used in lower-case format to
return four;
} // TComplex Four(Int_t n1, Int_t n2, Int_t n3, Int_t n4)

static double pdf(double* x, double* par)
{
double y = 1;
int harm = 6;
for (int i = 0; i < harm; i = i + 1) {
y = y + 2 * (0.04 + (i + 1.) * 0.01) * TMath::Cos((i + 1) * (x[0] - par[0]));
}
return y;
}

template <eRecSim rs, typename T1, typename T2>
void Steer(T1 const& collision, T2 const& tracks)
{
Expand All @@ -412,6 +424,8 @@ struct MultiharmonicCorrelations { // this name is used in lower-case format to
auto it = phih.histMap.find(currentRun);
auto histweight = wh.weightsmap.find(currentRun);
float centr = 0, M = 0., msel = 0.;
TF1* f = new TF1("f", pdf, 0, TMath::TwoPi(), 1);
f->SetParameters(0.);

if constexpr (rs == eRec || rs == eRecAndSim) {
if (cfCent.value == "FT0C")
Expand Down Expand Up @@ -511,6 +525,9 @@ struct MultiharmonicCorrelations { // this name is used in lower-case format to
event.fEventHistograms[ePt][eRec][1]->Fill(ptrec);

phi = track.phi();
if (cfToyModel) {
phi = f->GetRandom();
}
if (it != phih.histMap.end()) {
it->second->Fill(phi);
}
Expand Down Expand Up @@ -674,8 +691,8 @@ struct MultiharmonicCorrelations { // this name is used in lower-case format to
float maxdcaxy = l_dcaxy_bins[2];
float mindcaz = l_dcaz_bins[1];
float maxdcaz = l_dcaz_bins[2];
float maxncontr = l_ncontr_bins[1];
float minncontr = l_ncontr_bins[2];
float minncontr = l_ncontr_bins[1];
float maxncontr = l_ncontr_bins[2];

const char* cevent[] = {"vertexZ", "Pt"};
const char* cpro[] = {"rec", "sim"};
Expand Down
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