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MakeFakeData.c
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MakeFakeData.c
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#include <TH1F.h>
#include <TH2F.h>
#include <TROOT.h>
#include <TFile.h>
#include <TTree.h>
#include <TSystem.h>
#include <TChain.h>
#include <TLorentzVector.h>
#include <TLegend.h>
#include <TCanvas.h>
#include <TProfile.h>
#include <iostream>
#include <TFractionFitter.h>
#include <TStyle.h>
#include <TPaveText.h>
#include <THStack.h>
#include <TArrow.h>
#include <TArc.h>
#include <TRandom3.h>
#include "/Users/souvik/CommonAnalysisTools/Significance.c"
#include <RooRealVar.h>
#include <RooArgList.h>
#include <RooChebychev.h>
#include <RooDataHist.h>
#include <RooExtendPdf.h>
#include <RooWorkspace.h>
#include <RooDataSet.h>
#include <RooArgSet.h>
using namespace RooFit ;
double H_mass=125.0;
double mH_diff_cut=40.;
double mH_mean_cut=20.;
double rebin=2;
double SR_lo=380.;
double SR_hi=1600.;
SR_lo=200.;
double r1=15., r2=35.;
int fit=2; // 0 = Fit 2&4, 1 = Fit 1, 24, 3, 2 = Kolmogorov with 2+4.
double Normalize(TH1* h)
{
double nEntries=h->GetSumOfWeights();
h->Scale(1./nEntries);
return nEntries;
}
void fillUnweightedTH1(TH1F *h_in, TH1F *h_out, double weight=1.)
{
TRandom3 *r3=new TRandom3();
for (unsigned int i=1; i<=h_in->GetNbinsX(); ++i)
{
double binCenter=h_in->GetBinCenter(i);
double entry=h_in->GetBinContent(i);
// std::cout<<"entry = "<<entry<<std::endl;
for (unsigned int j=0; j<entry; ++j)
{
double throw=r3->Rndm();
// std::cout<<"throw = "<<throw<<std::endl;
if (throw<weight)
{
x=binCenter;
// std::cout<<"x = "<<x<<std::endl;
h_out->Fill(x);
}
}
}
}
void fillByThrowTH1(TH1F *h_in, TH1F *h_out, double weight=1.)
{
TRandom3 *r3=new TRandom3();
// Decide total number of throws
double max_h_in=h_in->GetMaximum();
double new_max_h_in=max_h_in*weight;
int throws=int(new_max_h_in*50.);
std::cout<<"throws = "<<throws<<std::endl;
std::cout<<"h_in->GetNbinsX() = "<<h_in->GetNbinsX()<<std::endl;
for (unsigned int i=1; i<=h_in->GetNbinsX(); ++i)
{
double binCenter=h_in->GetBinCenter(i);
double entry=h_in->GetBinContent(i);
double newEntry=entry*weight;
double prob=newEntry/double(throws);
for (unsigned int j=0; j<throws; ++j)
{
double throw=r3->Rndm();
if (throw<prob) h_out->Fill(binCenter);
}
}
}
Double_t crystalBall(Double_t *x, Double_t *par)
{
Double_t std=(x[0]-par[2])/par[3];
Double_t A=pow(par[1]/par[0], par[1])*exp(-0.5*pow(par[0], 2));
Double_t B=par[1]/par[0]-par[0];
Double_t result=0.;
if (std<par[0]) // Gaussian region
{
result=exp(-0.5*pow(std, 2));
}
else // Power Law region
{
result=A/pow(B+std, par[1]);
}
result=result*par[4];
return result;
}
void MakeFakeData()
{
std::string filename="Histograms_RadionToHH_4b_M-1100_TuneZ2star_8TeV_FULLSIM.root";
int rebin=4;
TFile *signal=new TFile(filename.c_str());
TH1F *h_mX_SR_signal=(TH1F*)signal->Get("h_mX_SR");
TFile *data_8TeVData2012=new TFile("Histograms_BJetPlusX_Run2012BCD_Skim.root");
TH1F *h_mX_CR2=(TH1F*)data_8TeVData2012->Get("h_mX_CR2");
TH1F *h_mX_CR4=(TH1F*)data_8TeVData2012->Get("h_mX_CR4");
TH1F *h_mX_CR24=(TH1F*)h_mX_CR2->Clone("h_mX_CR24");
h_mX_CR24->Add(h_mX_CR4);
h_mX_SR_signal->Rebin(rebin);
h_mX_CR24->Rebin(rebin);
// Normalize data control region shape with numbers from signal region to pretend it is the signal region
TH1F *h_mX_SR_fakeData=(TH1F*)h_mX_CR24->Clone("h_mX_SR_fakeData");
h_mX_SR_fakeData->Reset();
h_mX_SR_fakeData->SetLineColor(kBlack);
std::cout<<"Background CR->SR Scale, 277.542/h_mX_CR24->GetSumOfWeights() = "<<277.542/h_mX_CR24->GetSumOfWeights()<<std::endl;
// fillUnweightedTH1(h_mX_CR24, h_mX_SR_fakeData, (277.542/h_mX_CR24->GetSumOfWeights()));
fillByThrowTH1(h_mX_CR24, h_mX_SR_fakeData, (277.542/h_mX_CR24->GetSumOfWeights()));
// Calculate nSignal events given production cross section, branching fractions and efficiency
TH1F *h_CountWithPU=(TH1F*)signal->Get("CountWithPU");
double nSignal_init=h_CountWithPU->GetBinContent(1);
double nSignal_now=h_mX_SR_signal->GetSumOfWeights();
double eff_signal=nSignal_now/nSignal_init;
std::cout<<"Signal efficiency = "<<eff_signal<<std::endl;
// double totalLumi=13241.968; // /pb
double totalLumi=18600.0; // /pb
double prodXsec_1=1.0; // pb
// fillUnweightedTH1(h_mX_SR_signal, h_mX_SR_fakeData, prodXsec_1*totalLumi/nSignal_init);
fillByThrowTH1(h_mX_SR_signal, h_mX_SR_fakeData, prodXsec_1*totalLumi/nSignal_init);
gROOT->SetStyle("Plain");
gStyle->SetOptStat(000000000);
RooRealVar x("x", "m_{X} (GeV)", SR_lo, SR_hi);
RooDataHist data_obs("data_obs", "Data", RooArgList(x), h_mX_SR_fakeData);
RooPlot *plot=x.frame();
data_obs.plotOn(plot);
TCanvas *c_data=new TCanvas("c_data", "c_data", 500, 500);
plot->Draw();
RooWorkspace *w=new RooWorkspace("HbbHbb");
w->import(data_obs);
std::string mass=filename.substr(27,3);
std::cout<<"mass = "<<mass<<std::endl;
w->SaveAs(("w_data_"+mass+".root").c_str());
std::cout<<"1 pb signal = "<<h_mX_SR_signal->Integral(h_mX_SR_signal->FindBin(SR_lo), h_mX_SR_signal->FindBin(SR_hi))<<" (RAW) -- in 18.6 /fb --> "<<h_mX_SR_signal->Integral(h_mX_SR_signal->FindBin(SR_lo), h_mX_SR_signal->FindBin(SR_hi))*prodXsec_1*totalLumi/nSignal_init<<std::endl;
std::cout<<"1 pb yield = "<<h_mX_SR_fakeData->Integral(h_mX_SR_fakeData->FindBin(SR_lo), h_mX_SR_fakeData->FindBin(SR_hi))<<std::endl;
c_data->SaveAs(("c_data_"+mass+".png").c_str());
}