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lifetime.C
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lifetime.C
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/*
void lifetime()
{
Int_t nbins = 100;
TChain* chain_data = new TChain("treeFit");
chain_data->Add("/Users/ab/Documents/BsToJpsiPhi/BPB0_3D/fittree_ntuBdMC2018.root");
// chain_data->Add("/Users/ab/Documents/BsToJpsiPhi/BPB0_3D/fittree_ntuBdMC2018.root");
Int_t nevt = (int)chain_data->GetEntries();
std::cout<<"Number of total events"<<nevt<<"\n";
RooRealVar *BsCt2DMC_GEN = new RooRealVar("BsCt2DMC_GEN","proper time (ct) (cm)",0.012,0.3);
RooDataSet* data = new RooDataSet("data", "raw data1", RooArgSet(*BsCt2DMC_GEN),Import(*chain_data));
RooRealVar *tau = new RooRealVar("tau", "tau", 5.0095320e-02, 0.0, 0.3);
RooTruthModel *tm= new RooTruthModel("tm","truth model",*BsCt2DMC_GEN);
RooDecay *decay_gm = new RooDecay("decay_gm","decay",*BsCt2DMC_GEN, *tau, *tm, RooDecay::SingleSided);
RooFitResult* fitRes = decay_gm->fitTo(*data,Save());//data_SigReg
fitRes->Print("v");
RooPlot* decaytau = BsCt2DMC_GEN->frame(Title("Proper decay "),Bins(100));
data->plotOn(decaytau,DataError(RooAbsData::SumW2));
decay_gm->plotOn(decaytau);
decay_gm->paramOn(decaytau);
Double_t chisquare_time = decaytau->chiSquare();
cout<<"Chi square of lifetime fit is :"<< chisquare_time<< endl;
TCanvas *cc = new TCanvas("cc", "cc",0,0,600,600);
decaytau->Draw();
}
*/
/// \author - Muhammad Alibordi
// Test of RooKeyPDF has ability to discriminate the background and
#include "RooRealVar.h"
#include "RooDataSet.h"
#include "RooDataHist.h"
#include "RooGaussian.h"
#include "TCanvas.h"
#include "RooPlot.h"
#include "TTree.h"
#include "TH1D.h"
#include "TRandom.h"
//#include "/Users/md/Documents/BsToJpsiPhi/BPB0_3D/RooJohnsonLocal.cxx"
using namespace RooFit ;
using namespace std;
TH1* makeTH1()
{
auto hctaucut_eff = new TH1D("hctaucut_eff","ct(proper time) Efficiency Plot; ct (cm);#epsilon (ct) (a.u.) ", 100,0.007, 0.4);
auto hctaunocut_eff = new TH1D("hctaunocut_eff","ct(proper time) Efficiency Plot ;ct[cm];#epsilon [a.u.]", 100 ,0.007, 0.4);
Double_t time_bin = 5.0095320e-02;
TRandom3 *decay_lol = new TRandom3();
TFile *fIn1 = new TFile("/Users/md/Documents/BsToJpsiPhi/BPB0_3D/fittree_ntuBpMC2017.root");
TTree* mumu = (TTree*)fIn1->Get("treeFit");
Int_t n_entries1 = mumu->GetEntries();
std::cout<<n_entries1<<"\n";
Float_t recolife;
mumu->SetBranchAddress("BsCt2DMC",&recolife);
for (Int_t in=0;in<n_entries1;in++) {
mumu->GetEntry(in);
hctaucut_eff->Fill(recolife);
}
for( int ii = 0 ; ii < n_entries1 ; ii++ )
{
Double_t ctaugen_bin = decay_lol->Exp(time_bin);
Double_t actualctgen_bin = ctaugen_bin;//+resobulk->GetRandom();
if(actualctgen_bin > 0.007){
hctaunocut_eff->Fill(actualctgen_bin);}
}
auto effgraph = (TH1D*)hctaucut_eff->Clone("effgraph");
effgraph->Sumw2();
effgraph->Divide(hctaunocut_eff);
return effgraph;
}
void lifetime(string filename)
{
TH1* hh = makeTH1() ;
//RooRealVar *effvar=new RooRealVar("effvar","ct_{reco}/ct_{gen-smeared}; ct (cm); #epsilon (a.u.)",0.007,0.4) ;
Int_t nbins = 100;
//std::cout<<" Give the value of bin number "<<"\n";
//cin>>nbins;
auto ctform = new TF1("ctEffFn","expo(0)*ROOT::Math::Chebyshev4(x,[2],[3],[4],[5],[6])",0.007,0.4);
ctform->SetParameter(1,-1);
ctform->FixParameter(2,1);
Double_t bins[] = {0.007,0.0073,0.0076,0.0079, 0.008, 0.009, 0.01,0.011,0.012, 0.013,0.014,0.015,0.016,0.017,0.018,0.019, 0.02165, 0.02865,0.03565,0.04265, 0.04965, 0.05665, 0.06365,0.07065,0.07765,0.08465,0.09165,0.09865,0.10565,0.11265,0.11965,0.12665,0.13365,0.14065,0.14765,0.15465,0.16165,0.16865,0.17565,0.18265,0.18965,0.19665,0.20365,0.21065,0.21765,0.22465,0.23165,0.23865,0.24565,0.25265,0.25965,0.26665,0.27365,0.28065,0.28765,0.29465,0.3, 0.32,0.34,0.36,0.38,0.4};
Int_t binnum = sizeof(bins)/sizeof(Double_t) - 1;
auto resobulk = new TH1D("resobulk", "Resobulk ; From B_{d}^{0}; Events ", nbins, -0.004, 0.004);
auto pullbulk = new TH1D("pullbulk", "pullbulk ; From B_{d}^{0}; Events ", nbins, -5.0, 5.0);
auto cterror = new TH1D("cterror", "CtError; CtErrorEvents ", nbins, 0.0005, 0.005);
auto hctaucut = new TH1D("hctaucut","Recolifetime ;ct[cm];#epsilon [a.u.]", binnum, bins);
auto hctaunocut = new TH1D("hctaunocut","Gen lifetime ;ct[cm];#epsilon [a.u.]", binnum, bins);
Float_t ctreco , npv, cterr;
Double_t kappa_val;
Double_t par1, par2, par3, par4, par5, par6, par7;
Double_t time = 5.0095320e-02;//2018 pdg Bplus 491.1micron, B0 = 455.7 micron, 500.95320
TTree *fChain, *copy;
TFile* f = new TFile(filename.c_str());
fChain = new TTree;
fChain=(TTree*)f->Get("treeFit");
if (!fChain){
cout << "No TTree found in input file, returning" << endl;
return;
}
TRandom3 *decay = new TRandom3(5678);
fChain->SetBranchAddress("BsCt2DMC",&ctreco);
fChain->SetBranchAddress("BsCt2DMCErr",&cterr);
Long64_t nentries = fChain->GetEntries();
cout << "Start Processing " << nentries << " events" <<"\n";
for (int jentry=0; jentry<nentries;jentry++) {
fChain->GetEntry(jentry);
if (cterr !=cterr)continue;
if (ctreco !=ctreco)continue;
hctaucut->Fill(ctreco);
cterror->Fill(cterr);
}
//==========================The resolution and the pull is from B0 17MC sample
TFile *fb0 = new TFile("/Users/md/Documents/BsToJpsiPhi/BPB0_3D/fittree_ntuBdMC2018.root");
TTree* b0file = (TTree*)fb0->Get("treeFit");
Int_t n_entriesb0 = b0file->GetEntries();
Float_t ctrecob0, ctgenb0, cterrb0;
b0file->SetBranchAddress("BsCt2DMC",&ctrecob0);
b0file->SetBranchAddress("BsCt2DMC_GEN",&ctgenb0);
b0file->SetBranchAddress("BsCt2DMCErr",&cterrb0);
for( int k = 0 ; k < nentries ; k++ )
{
b0file->GetEntry(k);
resobulk->Fill(ctgenb0-ctrecob0);
pullbulk->Fill((ctgenb0-ctrecob0)/cterrb0);
}
TCanvas *c4= new TCanvas("c4", "c4",0,0,800,600);
resobulk->Draw();//hctaucut->Draw();//resobulk->Draw();//
TCanvas *c3= new TCanvas("c3", "c3",0,0,800,600);
pullbulk->Draw();//hctaunocut->Draw();//pullbulk->Draw();//
for( int i = 0 ; i < nentries ; i++ )
{
Double_t ctaugen1 = decay->Exp(time);
Double_t actualctgen1 = ctaugen1 + resobulk->GetRandom();
hctaunocut->Fill(actualctgen1);
}
kappa_val = pullbulk->GetRMS();
std::cout<<" kappa value for main pull: "<<"The Value of kappa: "<<pullbulk->GetRMS()<<"\n";
TCanvas *ceff= new TCanvas("ceff", "ceff",0,0,800,600);
auto hdivideI = (TH1D*)hctaucut->Clone("hdivideI");
hdivideI->Sumw2();
hdivideI->Divide(hctaunocut);
hdivideI->Draw("colz"); //colz ep
hdivideI->Fit(ctform);
TFitResultPtr r = hdivideI->Fit(ctform, "S");
TMatrixDSym cov = r->GetCovarianceMatrix(); // to access the covariance matrix
Double_t chi2 = r->Chi2(); // to retrieve the fit chi2
Double_t par0 = r->Parameter(0); // retrieve the value for the parameter 0
Double_t err0 = r->ParError(0); // retrieve the error for the parameter 0
r->Print("V"); // print full information of fit including covariance matrix
RooRealVar ctp0("ctp0", "ctp0", ctform->GetParameter(0));
ctp0.setError(ctform->GetParError(0));
RooRealVar ctp1("ctp1", "ctp1", ctform->GetParameter(1), "cm^{-1}");
ctp1.setError(ctform->GetParError(1));
RooRealVar ctp2("ctp2", "ctp2", ctform->GetParameter(2));
ctp2.setError(ctform->GetParError(2));
RooRealVar ctp3("ctp3", "ctp3", ctform->GetParameter(3), "cm^{-1}");
ctp3.setError(ctform->GetParError(3));
RooRealVar ctp4("ctp4", "ctp4", ctform->GetParameter(4), "cm^{-2}");
ctp4.setError(ctform->GetParError(4));
RooRealVar ctp5("ctp5", "ctp5", ctform->GetParameter(5), "cm^{-3}");
ctp5.setError(ctform->GetParError(5));
RooRealVar ctp6("ctp6", "ctp6", ctform->GetParameter(6), "cm^{-4}");
ctp6.setError(ctform->GetParError(6));
//==================
//==Model
//==================
TChain* chain_data = new TChain("treeFit");
chain_data->Add("/Users/md/Documents/BsToJpsiPhi/BPB0_3D/fittree_ntuBpMC2018.root");
//chain_data->Add("/Users/ab/Documents/BsToJpsiPhi/BPB0_3D/fittree_ntuBpMC2018.root");
Int_t nevt = (int)chain_data->GetEntries();
std::cout<<"Number of total events"<<nevt<<"\n";
RooRealVar *svmass= new RooRealVar("svmass", "M_{B^{+}} (GeV/c^{2})",5.18,5.4);
RooRealVar *BsCt2DMC = new RooRealVar("BsCt2DMC","proper time (ct) (cm)",0.007,0.4);
RooRealVar *BsCt2DMCErr = new RooRealVar("BsCt2DMCErr", " #Deltact_{B0}",0.0007, 0.008,"cm");
RooDataSet* data = new RooDataSet("data", "raw data1", RooArgSet(*svmass,*BsCt2DMC,*BsCt2DMCErr),Import(*chain_data));
/*RooDataHist *dh = new RooDataHist("dh","dh",*BsCt2DMC,Import(*hh)) ;
RooHistPdf *effvarpdf = new RooHistPdf("effvarpdf","effhistpdf",*BsCt2DMC, *dh, 0) ;
RooPlot *efficiency = BsCt2DMC->frame(Title("Efficiency"),Bins(100)) ;
dh->plotOn(efficiency) ;
effvarpdf->plotOn(efficiency) ;
auto cmeff = new TCanvas("cmeff", "cmeff", 0, 0, 800, 600);
efficiency->Draw();
*/
RooRealVar *tau = new RooRealVar("tau", "tau", 5.0095320e-02, 0.04, 0.06);
RooRealVar *kappa = new RooRealVar("kappa", "kappa", kappa_val);
//RooRealVar *kappa = new RooRealVar("kappa", "kappa", 0.00001, 1.3);//kappa_val);
RooFormulaVar *kapreso = new RooFormulaVar("kapreso", "kappa*BsCt2DMCErr", RooArgList(*kappa, *BsCt2DMCErr));
RooRealVar *bias = new RooRealVar("bias","bias",0);
RooRealVar *sdscale = new RooRealVar("sdscale","per-event error scale factor",1);
RooGaussModel *gm_sig = new RooGaussModel("gm_sig","gauss model scaled bt per-event error", *BsCt2DMC, *bias, *sdscale, *kapreso);
RooDecay *decay_gm = new RooDecay("decay_gm","decay",*BsCt2DMC, *tau, *gm_sig, RooDecay::SingleSided);
RooFormulaVar *ctEffFunc = new RooFormulaVar("ctEffFunc","eff", "exp(@0+@1*BsCt2DMC)*ROOT::Math::Chebyshev4(BsCt2DMC,@2,@3,@4,@5,@6)",RooArgList(ctp0, ctp1, ctp2, ctp3, ctp4, ctp5, ctp6, *BsCt2DMC));
RooEffProd *MTpdf = new RooEffProd("MTpdf","model with efficiency-Full 2D ", *decay_gm, *ctEffFunc);//
//RooEffProd *MTpdf = new RooEffProd("MTpdf","model with efficiency-Full 2D ", *decay_gm, *effvarpdf);//
RooAbsReal* nll = MTpdf->createNLL(*data,NumCPU(8)) ;
RooMinuit(*nll).migrad() ;
RooMinuit(*nll).minos();
RooMinuit(*nll).hesse();
RooFitResult* fitRes = MTpdf->fitTo(*data,Save(),NumCPU(8));//,ConditionalObservables(*BsCt2DMCErr));//data_SigReg
fitRes->Print("v");
RooPlot* decaytau = BsCt2DMC->frame(Title("Proper decay "),Bins(100));
data->plotOn(decaytau,DataError(RooAbsData::SumW2));
MTpdf->plotOn(decaytau);
MTpdf->paramOn(decaytau);
RooPlot* pullframect = BsCt2DMC->frame(RooFit::Title("ct pull"));
RooHist* hpullct = decaytau->pullHist();
pullframect->addPlotable(hpullct,"P0") ;
pullframect->SetMinimum(-3) ;
pullframect->SetMaximum(+3) ;
pullframect->SetYTitle("pull");
pullframect->SetMarkerStyle(20);
pullframect->SetNdivisions(10);
Double_t chisquare_time = decaytau->chiSquare();
MTpdf->plotOn(decaytau,RooFit::LineColor(kGreen),RooFit::Components("decay_gm"), RooFit::Name("signalct"), LineWidth(2), LineStyle(4));
TLegend *legct = new TLegend(0.7,0.7,0.9,0.9);
legct->AddEntry(decaytau->findObject("signalct"),"B^{+}#rightarrow J/#psi K^{+}","l");
TCanvas *cc = new TCanvas("cc", "cc",0,0,600,600);
TPad *pad11 = new TPad("pad1","pad1",0,0.33,1,1);
TPad *pad21 = new TPad("pad2","pad2",0,0,1,0.33);
pad11->SetBottomMargin(0.00001);
pad11->SetBorderMode(0);
pad21->SetTopMargin(0.00001);
pad21->SetBottomMargin(0.1);
pad21->SetBorderMode(0);
pad11->Draw();
pad21->Draw();
pad11->cd();
pad11->SetLogy();
gStyle->SetOptTitle(0);
cc->SetFillColor(0);
cc->SetBorderSize(2);
cc->SetLeftMargin(0.1422222);
cc->SetRightMargin(0.04444445);
decaytau->SetStats(0);
decaytau->Draw();
legct->Draw("same");
auto cms11 = new TLatex(0.007, 26200, "#bf{CMS} #it{Simulation} 2018MC, #sqrt{s} = 13 TeV");
cms11->SetNDC(false);
cms11->SetTextColor(12);
cms11->SetTextFont(42);
cms11->SetTextSize(0.055);
cms11-> Draw();
pad21->cd();
pullframect->SetStats(0);
pullframect->Draw();
cc->cd();
cout<<"Chi square of lifetime fit is :"<< chisquare_time<< endl;
}