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225 lines
8.8 KiB
225 lines
8.8 KiB
#include "TH1D.h"
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#include "TH2D.h"
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#include "THStack.h"
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#include "TGraph.h"
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#include "TTree.h"
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#include "TChain.h"
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#include "TFile.h"
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#include "TCanvas.h"
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#include "TROOT.h"
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#include "TStyle.h"
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#include "TColor.h"
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#include "TLorentzVector.h"
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#include "TRandom3.h"
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#include "TLorentzVector.h"
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#include "RooDataHist.h"
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#include "RooRealVar.h"
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#include "RooPlot.h"
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#include "RooGaussian.h"
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#include "RooExponential.h"
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#include "RooRealConstant.h"
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#include "RooAddPdf.h"
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#include "RooFitResult.h"
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#include "RooProduct.h"
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#include "RooCrystalBall.h"
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#include <string>
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#include <iostream>
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const int nBins = 150;
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RooPlot* CreateRooFit(TH1D* hist);
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int pre_selection_cuts()
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{
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// just some plotting options
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gROOT->SetStyle("Plain");
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TPad foo;
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const int NRGBs = 5;
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const int NCont = 250;
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double stops[NRGBs] = {0.00, 0.34, 0.61, 0.84, 1.00};
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double red[NRGBs] = {0.00, 0.00, 0.87, 1.00, 0.51};
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double green[NRGBs] = {0.00, 0.81, 1.00, 0.20, 0.00};
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double blue[NRGBs] = {0.51, 1.00, 0.12, 0.00, 0.00};
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TColor::CreateGradientColorTable(NRGBs, stops, red, green, blue, NCont);
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gStyle->SetNumberContours(NCont);
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gStyle->SetLabelFont(132, "xyz");
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gStyle->SetTitleFont(132, "xyz");
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gStyle->SetLegendFont(132);
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gStyle->SetStatFont(132);
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gStyle->SetEndErrorSize(10.0);
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gStyle->SetOptStat(0);
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gStyle->SetOptFit(0);
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// files to load
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std::vector<std::string> filenames =
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{
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"./BuToKpMuMu_Collision23_Beam6800GeV-VeloClosed-MagDown-Excl-UT_RealData_Sprucing23r1_90000000_RD.root"};
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TChain *chain = new TChain("SpruceRD_BuToKpMuMu/DecayTree");
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for (unsigned int i = 0; i < filenames.size(); i++)
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{
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chain->Add(filenames.at(i).c_str());
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}
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Double_t Bplus_M, // 4400 -> 8200
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JPsi_M, // 200 -> 6600
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Kplus_M; // 493.6769 -> 493.6779
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Float_t Bplus_PT, // 0 -> 30 * 10^3
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Bplus_FDCHI2_OWNPV, // 0 -> 7000
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JPsi_IP_OWNPV, // 0 -> 3
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JPsi_PT, // 0 -> 26 * 10^3
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Kplus_IP_OWNPV, // 0 -> 7
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Kplus_PT; // 0 -> 11 * 10^3
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chain->SetBranchAddress("Bplus_M", &Bplus_M);
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chain->SetBranchAddress("Bplus_PT", &Bplus_PT);
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chain->SetBranchAddress("Bplus_FDCHI2_OWNPV", &Bplus_FDCHI2_OWNPV);
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chain->SetBranchAddress("JPsi_M", &JPsi_M);
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chain->SetBranchAddress("JPsi_IP_OWNPV", &JPsi_IP_OWNPV);
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chain->SetBranchAddress("JPsi_PT", &JPsi_PT);
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chain->SetBranchAddress("Kplus_M", &Kplus_M);
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chain->SetBranchAddress("Kplus_IP_OWNPV", &Kplus_IP_OWNPV);
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chain->SetBranchAddress("Kplus_PT", &Kplus_PT);
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TH1D *h1_Bplus_M = new TH1D("h1_Bplus_M", "B+ Mass", nBins, 4500, 7500);
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TH1D *h1_Bplus_PT = new TH1D("h1_Bplus_PT", "B+ P_{T}", nBins, 0, 15000);
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TH1D *h1_Bplus_FDCHI2_OWNPV = new TH1D("h1_Bplus_FDCHI2_OWNPV", "B+ FD #chi^{2}", nBins, 0, 3000);
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TH1D *h1_JPsi_M = new TH1D("h1_JPsi_M", "J/#psi Mass", nBins, 200, 6600);
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TH1D *h1_JPsi_IP_OWNPV = new TH1D("h1_JPsi_IP_OWNPV", "J/#psi IP", nBins, 0, 1);
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TH1D *h1_JPsi_PT = new TH1D("h1_JPsi_PT", "J/#psi P_{T}", nBins, 0, 15000);
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TH1D *h1_Kplus_M = new TH1D("h1_Kplus_M", "K^{+} Mass", nBins, 493.676999999, 493.677000001);
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TH1D *h1_Kplus_IP_OWNPV = new TH1D("h1_Kplus_IP_OWNPV", "K^{+} IP", nBins, 0, 3);
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TH1D *h1_Kplus_PT = new TH1D("h1_Kplus_PT", "K^{+} P_{T}", nBins, 0, 6500);
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TH1D *h1_bkg_Bplus_M = new TH1D("h1_bkg_Bplus_M", "B+ Mass", nBins, 4500, 7500);
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TH1D *h1_bkg_Bplus_PT = new TH1D("h1_bkg_Bplus_PT", "B+ P_{T}", nBins, 0, 15000);
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TH1D *h1_bkg_Bplus_FDCHI2_OWNPV = new TH1D("h1_bkg_Bplus_FDCHI2_OWNPV", "B+ FD #chi^{2}", nBins, 0, 3000);
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TH1D *h1_bkg_JPsi_M = new TH1D("h1_bkg_JPsi_M", "J/#psi Mass", nBins, 200, 6600);
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TH1D *h1_bkg_JPsi_IP_OWNPV = new TH1D("h1_bkg_JPsi_IP_OWNPV", "J/#psi IP", nBins, 0, 1);
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TH1D *h1_bkg_JPsi_PT = new TH1D("h1_bkg_JPsi_PT", "J/#psi P_{T}", nBins, 0, 15000);
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TH1D *h1_bkg_Kplus_M = new TH1D("h1_bkg_Kplus_M", "K^{+} Mass", nBins, 493.676999999, 493.677000001);
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TH1D *h1_bkg_Kplus_IP_OWNPV = new TH1D("h1_bkg_Kplus_IP_OWNPV", "K^{+} IP", nBins, 0, 3);
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TH1D *h1_bkg_Kplus_PT = new TH1D("h1_bkg_Kplus_PT", "K^{+} P_{T}", nBins, 0, 6500);
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unsigned int entries = chain->GetEntries();
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// loop over all entries in the tree
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for (unsigned int i = 0; i < entries; i++)
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{
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chain->GetEntry(i);
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const double JSPI_MASS = 3096.;
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/*
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B+ PT > 1500.
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B+ FDCHI2 > 100.
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J/Psi IP > 0.05
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J/Psi PT > 1000.
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K+ IP > 0.2
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K+ PT > 650.
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*/
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if (Bplus_PT > 1200. && Bplus_FDCHI2_OWNPV > 90. && JPsi_IP_OWNPV > 0.05 &&
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JPsi_PT > 800. && Kplus_IP_OWNPV > 0.17 && Kplus_PT > 500. && (JSPI_MASS - 150. < JPsi_M && JPsi_M < JSPI_MASS + 150.)) {
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h1_Bplus_M->Fill(Bplus_M);
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} else {
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h1_bkg_Bplus_M->Fill(Bplus_M);
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}
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if (Bplus_M > 5700.)
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{
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h1_bkg_Bplus_PT->Fill(Bplus_PT);
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h1_bkg_Bplus_FDCHI2_OWNPV->Fill(Bplus_FDCHI2_OWNPV);
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h1_bkg_JPsi_M->Fill(JPsi_M);
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h1_bkg_JPsi_IP_OWNPV->Fill(JPsi_IP_OWNPV);
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h1_bkg_JPsi_PT->Fill(JPsi_PT);
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h1_bkg_Kplus_M->Fill(Kplus_M);
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h1_bkg_Kplus_IP_OWNPV->Fill(Kplus_IP_OWNPV);
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h1_bkg_Kplus_PT->Fill(Kplus_PT);
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}
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else
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{
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h1_Bplus_PT->Fill(Bplus_PT);
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h1_Bplus_FDCHI2_OWNPV->Fill(Bplus_FDCHI2_OWNPV);
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h1_JPsi_M->Fill(JPsi_M);
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h1_JPsi_IP_OWNPV->Fill(JPsi_IP_OWNPV);
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h1_JPsi_PT->Fill(JPsi_PT);
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h1_Kplus_M->Fill(Kplus_M);
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h1_Kplus_IP_OWNPV->Fill(Kplus_IP_OWNPV);
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h1_Kplus_PT->Fill(Kplus_PT);
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}
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}
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TCanvas *c1 = new TCanvas("c1", "Canvas 1", 0, 0, 800, 600);
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//h1_bkg_Bplus_M->SetLineColor(kRed);
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//h1_bkg_Bplus_M->Draw();
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h1_Bplus_M->Draw();
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c1->Draw();
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std::vector<TH1 *> small_histos{h1_Bplus_PT, h1_Bplus_FDCHI2_OWNPV, h1_JPsi_M, h1_JPsi_IP_OWNPV, h1_JPsi_PT, h1_Kplus_M, h1_Kplus_IP_OWNPV, h1_Kplus_PT};
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std::vector<TH1 *> small_bkg_histos{h1_bkg_Bplus_PT, h1_bkg_Bplus_FDCHI2_OWNPV, h1_bkg_JPsi_M, h1_bkg_JPsi_IP_OWNPV, h1_bkg_JPsi_PT, h1_bkg_Kplus_M, h1_bkg_Kplus_IP_OWNPV, h1_bkg_Kplus_PT};
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TCanvas *c2 = new TCanvas("c2", "Canvas 2", 0, 0, 1200, 600);
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c2->Divide(4, 2);
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for (size_t i = 0; i < small_histos.size(); i++)
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{
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c2->cd(i + 1);
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small_histos[i]->Draw();
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small_bkg_histos[i]->SetLineColor(kRed);
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small_bkg_histos[i]->Draw("SAME");
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}
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c2->Draw();
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TCanvas *c3 = new TCanvas("c3", "Canvas 3", 0, 0, 800, 600);
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auto fitFrame = CreateRooFit(h1_Bplus_M);
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fitFrame->Draw();
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c3->Draw();
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return 0;
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}
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RooPlot* CreateRooFit(TH1D* hist) {
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RooRealVar roo_var_mass("roo_var_mass", "B+ Mass Variable", 4500., 7500.);
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roo_var_mass.setRange("fitting_range", 4700., 6500.);
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TString hist_name = "roohist_bplus_M";
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RooDataHist roohist_bplus_M(hist_name, "B Plus Mass Histogram", roo_var_mass, RooFit::Import(*hist));
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RooRealVar roo_sig_gauss_mean("roo_sig_gauss_mean", "Mass Gauss Mean", 5250., 5100., 5400.);
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RooRealVar roo_sig_gauss_sigma("roo_sig_gauss_sigma", "Mass Gauss Sigma", 60., 0., 150.);
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RooGaussian roo_sig_gauss("roo_sig_gauss", "B+ Mass Signal Gaussian", roo_var_mass, roo_sig_gauss_mean, roo_sig_gauss_sigma);
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RooRealVar roo_bkg_exp_c("roo_bkg_exp_c", "Background C", -0.00117202, -0.003, -0.001);
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RooExponential roo_bkg_exp("roo_bkg_exp", "B+ Mass Background Exp", roo_var_mass, roo_bkg_exp_c);
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RooRealVar roo_var_mass_nsig("roo_var_mass_nsig", "B+ Mass N Signal", 0., hist->GetEntries());
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RooRealVar roo_var_mass_nbkg("roo_var_mass_nbkg", "B+ Mass N Background", 0., hist->GetEntries());
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TString pdf_name = "roo_pdf_sig_plus_bkg";
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RooAddPdf roo_pdf_sig_plus_bkg(pdf_name, "Sig + Bkg PDF",
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RooArgList(roo_sig_gauss, roo_bkg_exp),
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RooArgList(roo_var_mass_nsig, roo_var_mass_nbkg));
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RooPlot *roo_frame_mass = roo_var_mass.frame();
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roohist_bplus_M.plotOn(roo_frame_mass, RooFit::Binning(nBins), RooFit::Name(hist_name));
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RooFitResult *fitres = roo_pdf_sig_plus_bkg.fitTo(roohist_bplus_M, RooFit::Save(), RooFit::PrintLevel(1), RooFit::Range("fitting_range"));
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roo_pdf_sig_plus_bkg.plotOn(roo_frame_mass, RooFit::VisualizeError(*fitres, 1), RooFit::FillColor(kOrange + 1), RooFit::FillStyle(3144));
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roo_pdf_sig_plus_bkg.plotOn(roo_frame_mass, RooFit::LineColor(kRed), RooFit::LineStyle(kSolid), RooFit::Range("fitting_range"), RooFit::Name(pdf_name));
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roo_pdf_sig_plus_bkg.plotOn(roo_frame_mass, RooFit::Components(RooArgSet(roo_bkg_exp)), RooFit::LineColor(kBlue), RooFit::LineStyle(kDashed), RooFit::Range("fitting_range"));
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roo_sig_gauss.paramOn(roo_frame_mass, RooFit::Layout(0.60, 0.99, 0.90));
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roo_frame_mass->getAttText()->SetTextSize(0.027);
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return roo_frame_mass;
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}
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