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BackgroundPrediction_Kinematic_CrystalBall.cc
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BackgroundPrediction_Kinematic_CrystalBall.cc
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#include <iostream>
#include <TH1F.h>
#include <TROOT.h>
#include <TFile.h>
#include <TLegend.h>
#include <TCanvas.h>
#include <TProfile.h>
#include <TStyle.h>
#include <TPaveText.h>
#include <THStack.h>
#include <TF1.h>
#include <TSystem.h>
#include <TGraphErrors.h>
#include <TF1.h>
#include <TLine.h>
#include "CMS_lumi.c"
// Plot cosmetics
int iPeriod = 4; // 1=7TeV, 2=8TeV, 3=7+8TeV, 7=7+8+13TeV
int iPos = 11;
std::string itoa(int i)
{
char res[10];
sprintf(res, "%d", i);
std::string ret(res);
return ret;
}
void BackgroundPrediction_Kinematic_CrystalBall(std::string filename,
double plot_lo, double plot_hi, double rebin,
double fit_lo, double fit_hi,
double crystalball_mean_lo, double crystalball_mean_hi,
double crystalball_width_lo, double crystalball_width_hi,
double crystalball_exp_lo, double crystalball_exp_hi,
double crystalball_switch_lo, double crystalball_switch_hi,
double gaussexp_mean_lo, double gaussexp_mean_hi,
double gaussexp_width_lo, double gaussexp_width_hi,
double gaussexp_exp_lo, double gaussexp_exp_hi,
std::string hist="h_mX_SB_kinFit",
std::string log="lin")
{
gROOT->SetStyle("Plain");
gStyle->SetPadGridX(0);
gStyle->SetPadGridY(0);
gStyle->SetOptStat(0000);
writeExtraText = true; // if extra text
extraText = "Preliminary"; // default extra text is "Preliminary"
lumi_13TeV = "35.9 fb^{-1}"; // default is "5.1 fb^{-1}"
TFile *f_data=new TFile(filename.c_str());
TH1F *h_mX_SR=(TH1F*)f_data->Get(hist.c_str());
h_mX_SR->Rebin(rebin);
TH1F *h_tmp=(TH1F*)f_data->Get("h_mX_SR_kinFit");
double nEventsSR= h_tmp->GetSumOfWeights();//Integral(h_tmp->FindBin(fit_lo),h_tmp->FindBin(fit_hi));
RooRealVar *x;
x=new RooRealVar("x", "m_{X} (GeV)", plot_lo, plot_hi);
RooDataHist pred("pred", "Data", RooArgList(*x), h_mX_SR);
RooRealVar bg_p0("bg_p0", "bg_p0", crystalball_switch_lo, crystalball_switch_hi);
RooRealVar bg_p1("bg_p1", "bg_p1", crystalball_exp_lo, crystalball_exp_hi);
RooRealVar bg_p2("bg_p2", "bg_p2", crystalball_mean_lo, crystalball_mean_hi);
RooRealVar bg_p3("bg_p3", "bg_p3", crystalball_width_lo, crystalball_width_hi);
RevCrystalBall bg("background", "Background Prediction PDF", *x, bg_p0, bg_p1, bg_p2, bg_p3);
RooFitResult *r_bg=bg.fitTo(pred, RooFit::Range(fit_lo, fit_hi), RooFit::Save());
RooPlot *data_plot=x->frame();
pred.plotOn(data_plot);
bg.plotOn(data_plot, RooFit::VisualizeError(*r_bg, 0.5), RooFit::FillColor(kGreen+1), RooFit::FillStyle(3001));
bg.plotOn(data_plot, RooFit::LineColor(kBlack));
pred.plotOn(data_plot, RooFit::LineColor(kBlack), RooFit::MarkerColor(kBlack));
RooRealVar bg_p00("bg_p00", "bg_p00", gaussexp_mean_lo, gaussexp_mean_hi);
RooRealVar bg_p11("bg_p11", "bg_p11", gaussexp_width_lo, gaussexp_width_hi);
RooRealVar bg_p22("bg_p22", "bg_p22", gaussexp_exp_lo, gaussexp_exp_hi);
GaussExp bg_exp("bg_exp", "Background Prediction PDF", *x, bg_p00, bg_p11, bg_p22);
RooPlot *data_plot2=x->frame();
RooFitResult *r_bg_exp=bg_exp.fitTo(pred, RooFit::Range(fit_lo, fit_hi), RooFit::Save());
pred.plotOn(data_plot2);
//bg_exp.plotOn(data_plot2, RooFit::VisualizeError(*r_bg_exp, 1, kFALSE), RooFit::FillColor(kCyan+1), RooFit::FillStyle(3001));
bg_exp.plotOn(data_plot2, RooFit::LineColor(kBlue+1));
pred.plotOn(data_plot2, RooFit::LineColor(kBlack), RooFit::MarkerColor(kBlack));
double fitChi2=data_plot->chiSquare();
std::cout<<"Fit chi2 = "<<fitChi2<<std::endl;
RooAbsReal* chi2_data = bg.createChi2(pred);
double pvalue=TMath::Prob(chi2_data->getVal(),int((fit_hi-fit_lo)/rebin)-3);
std::cout<<"p-value = "<<TMath::Prob(chi2_data->getVal(),int((fit_hi-fit_lo)/rebin)-3)<<std::endl;
double xPad = 0.3;
TCanvas *c_Background=new TCanvas("c_Background", "c_Background", 700*(1.-xPad), 700);
c_Background->SetFillStyle(4000);
c_Background->SetFrameFillColor(0);
TPad *p_1=new TPad("p_1", "p_1", 0, xPad, 1, 1);
p_1->SetFillStyle(4000);
p_1->SetFrameFillColor(0);
p_1->SetBottomMargin(0.02);
TPad* p_2 = new TPad("p_2", "p_2",0,0,1,xPad);
p_2->SetBottomMargin((1.-xPad)/xPad*0.13);
p_2->SetTopMargin(0.03);
p_2->SetFillColor(0);
p_2->SetBorderMode(0);
p_2->SetBorderSize(2);
p_2->SetFrameBorderMode(0);
p_2->SetFrameBorderMode(0);
p_1->Draw();
p_2->Draw();
p_1->cd();
if (log=="log") data_plot->GetYaxis()->SetRangeUser(1e-4, h_mX_SR->GetMaximum()*5.);
else data_plot->GetYaxis()->SetRangeUser(0, h_mX_SR->GetMaximum()*1.5);
data_plot->Draw();
data_plot->GetXaxis()->SetLabelOffset(0.03);
data_plot->GetYaxis()->SetLabelFont(42);
data_plot->GetYaxis()->SetTitleFont(42);
data_plot2->Draw("same");
data_plot->GetYaxis()->SetTitleOffset(1.25);
data_plot->SetTitle(("; m_{X} (GeV); Events / "+itoa(h_mX_SR->GetBinWidth(1))+" GeV").c_str());
if (log=="log") p_1->SetLogy();
TPaveText *pave = new TPaveText(0.86,0.6,0.67,0.7,"NDC");
pave->SetBorderSize(0);
pave->SetTextSize(0.03);
pave->SetLineColor(1);
pave->SetLineStyle(1);
pave->SetLineWidth(2);
pave->SetFillColor(0);
pave->SetFillStyle(0);
char name[1000];
char name1[1000];
if (hist.substr(0,7)=="h_mX_SB") {
sprintf(name,"SB #chi^{2}/n = %.2f",fitChi2);
sprintf(name1,"p-value = %.2f",pvalue);
}
else sprintf(name,"SR #chi^{2}/n = %.2f",fitChi2);
pave->AddText(name);
pave->AddText(name1);
pave->Draw();
TLatex * tPrel = new TLatex();
tPrel->SetNDC();
tPrel->SetTextColor(kBlack);
tPrel->SetTextSize(0.04);
TLegend *leg = new TLegend(0.85625,0.721654,0.6165625,0.8903839,NULL,"brNDC");
leg->SetBorderSize(0);
leg->SetTextSize(0.035);
leg->SetLineColor(1);
leg->SetLineStyle(1);
leg->SetLineWidth(2);
leg->SetFillColor(0);
leg->SetFillStyle(0);
h_mX_SR->SetMarkerStyle(20);
if (hist.substr(0,7)=="h_mX_SB") leg->AddEntry(h_mX_SR, "Data in SB", "ep");
else leg->AddEntry(h_mX_SR, "Data in SR", "ep");
TH1F * temp = new TH1F("temp", "temp", 100, 0,1); temp->SetLineWidth(2); temp->SetLineColor(kBlack);
leg->AddEntry(temp, "CrystalBall fit", "l");
TH1F * temp1 = new TH1F("temp1", "temp1", 100, 0,1); temp1->SetLineWidth(2);
temp1->SetLineColor(kBlue+1);
leg->AddEntry(temp1, "GaussExp fit", "l");
leg->Draw();
CMS_lumi( p_1, iPeriod, iPos );
p_2->cd();
RooHist *hpull;
hpull = data_plot->pullHist();
RooPlot* frameP = x->frame() ;
frameP->SetTitle("; m_{X} (GeV); Pull");
frameP->addPlotable(hpull,"P");
frameP->GetYaxis()->SetRangeUser(-5,5);
frameP->GetXaxis()->SetRangeUser(fit_lo, fit_hi);
frameP->SetTitle("");
frameP->GetYaxis()->SetTitle("Pull");
frameP->GetYaxis()->SetTitleFont(42);
frameP->GetYaxis()->SetLabelFont(42);
frameP->GetXaxis()->SetTitleFont(42);
frameP->GetXaxis()->SetLabelFont(42);
frameP->GetYaxis()->SetTitleSize((1.-xPad)/xPad*0.06);
frameP->GetYaxis()->SetTitleOffset(1.2/((1.-xPad)/xPad));
frameP->GetXaxis()->SetTitleSize((1.-xPad)/xPad*0.055);
frameP->GetXaxis()->SetLabelSize((1.-xPad)/xPad*0.045);
frameP->GetYaxis()->SetLabelSize((1.-xPad)/xPad*0.027);
frameP->Draw();
frameP->Draw();
TLine *line=new TLine(fit_lo, 0, fit_hi, 0);
line->SetLineWidth(2);
line->Draw();
string tag;
if (hist.substr(0,7)=="h_mX_SB") tag="SB";
else tag="SR";
c_Background->SaveAs(("BackgroundFit_"+tag+"_CrystalBall.png").c_str());
c_Background->SaveAs(("BackgroundFit_"+tag+"_CrystalBall.pdf").c_str());
RooWorkspace *w_background=new RooWorkspace("HbbHbb");
w_background->import(bg);
w_background->import(bg_exp);
// Normalize h_mX_SB to SR for pretend data
TH1F *h_mX_SR_fakeData=(TH1F*)h_mX_SR->Clone("h_mX_SR_fakeData");
h_mX_SR_fakeData->Scale(nEventsSR/h_mX_SR_fakeData->GetSumOfWeights());
RooDataHist data_obs("data_obs", "Data", RooArgList(*x), h_mX_SR_fakeData);
//std::cout<<" COUNTING = "<<h_mX_SR_fakeData->Integral(h_mX_SR_fakeData->FindBin(fit_lo),h_mX_SR_fakeData->FindBin(fit_hi))<<std::endl;
//std::cout<<" COUNTING = "<<data_obs.sumEntries()<<std::endl;
w_background->import(data_obs);
w_background->SaveAs("w_background_Crystal.root");
RooWorkspace *w_data=new RooWorkspace("HbbHbb");
w_data->import(data_obs);
w_data->SaveAs("w_data.root");
// For the datacard
std::cout<<" === RooFit data fit result to be entered in datacard === "<<std::endl;
std::cout<<" Background number of events = "<<h_mX_SR_fakeData->Integral(h_mX_SR_fakeData->FindBin(fit_lo),h_mX_SR_fakeData->FindBin(fit_hi))<<std::endl;
std::cout<<"bg_p2 param "<<bg_p2.getVal()<<" "<<bg_p2.getError()<<std::endl;
std::cout<<"bg_p3 param "<<bg_p3.getVal()<<" "<<bg_p3.getError()<<std::endl;
std::cout<<"bg_p0 param "<<bg_p0.getVal()<<" "<<bg_p0.getError()<<std::endl;
std::cout<<"bg_p1 param "<<bg_p1.getVal()<<" "<<bg_p1.getError()<<std::endl;
}