From 86733e3bdbf43e3351b633e335214bc68695c025 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?GIRARD=20ALCINDOR=20Val=C3=A9rian?=
<girard-alcindor@ijclab.in2p3.fr>
Date: Tue, 16 Jan 2024 16:46:00 +0100
Subject: [PATCH] Adding a e870 related macro
---
Projects/e870/macros/DrawExInvariant.cxx | 166 +++++++++++++++++++++++
1 file changed, 166 insertions(+)
create mode 100644 Projects/e870/macros/DrawExInvariant.cxx
diff --git a/Projects/e870/macros/DrawExInvariant.cxx b/Projects/e870/macros/DrawExInvariant.cxx
new file mode 100644
index 000000000..0d1918122
--- /dev/null
+++ b/Projects/e870/macros/DrawExInvariant.cxx
@@ -0,0 +1,166 @@
+void DrawDalitz() {
+ ////////////////////////////////////////////////////////////////////////////////
+ TLorentzVector LV_alpha, LV_proton, LV_fragment;
+ double mu = 931.5; // MeV/c2
+ double m_proton = mu + 7.289; // Mev/c2
+ double m_alpha = 4 * mu + 2.425; // Mev/c2
+ double m_fragment = 44 * mu - 3.755; // Mev/c2
+ double m_5Li = 5 * mu + 11.68; // MeV/c2
+
+ TChain* t = new TChain("PhysicsTree"); // SimulatedTree
+ t->Add("NPRootA/NPr0371_*a.root"); // Name of simulated file
+
+ // YOUR ALPHA AND Li CUT
+ TFile* fcuta = new TFile("CUT_e805/CUT_alpha_must.root", "read");
+ TCutG* cuta = (TCutG*)gDirectory->FindObjectAny("CUT_alpha_must");
+ TFile* fcutp = new TFile("CUT_e805/CUT_proton_must.root", "read");
+ TCutG* cutp = (TCutG*)gDirectory->FindObjectAny("CUT_proton_must");
+
+ ////////////////////////////////////////////////////////////////////////////////
+ TMust2Physics* M2 = new TMust2Physics();
+ std::vector<double>* ELab = 0;
+ std::vector<double>* ThetaLab = 0;
+ std::vector<double>* M2_X = 0;
+ std::vector<double>* M2_Y = 0;
+ std::vector<double>* M2_Z = 0;
+ TBranch* b_ELab;
+ TBranch* b_ThetaLab;
+ TBranch* b_M2_X;
+ TBranch* b_M2_Y;
+ TBranch* b_M2_Z;
+
+ float CATS1_X, CATS1_Y, CATS2_X, CATS2_Y, Xf, Yf;
+
+ t->SetBranchStatus("*", false);
+ t->SetBranchStatus("MUST2", true);
+ t->SetBranchAddress("MUST2", &M2);
+ t->SetBranchStatus("M2_ELab", true);
+ t->SetBranchAddress("M2_ELab", &ELab, &b_ELab);
+ t->SetBranchStatus("M2_ThetaLab", true);
+ t->SetBranchAddress("M2_ThetaLab", &ThetaLab, &b_ThetaLab);
+ t->SetBranchStatus("CATS1_X", "true");
+ t->SetBranchAddress("CATS1_X", &CATS1_X);
+ t->SetBranchStatus("CATS1_Y", "true");
+ t->SetBranchAddress("CATS1_Y", &CATS1_Y);
+ t->SetBranchStatus("CATS2_X", "true");
+ t->SetBranchAddress("CATS2_X", &CATS2_X);
+ t->SetBranchStatus("CATS2_Y", "true");
+ t->SetBranchAddress("CATS2_Y", &CATS2_Y);
+ t->SetBranchStatus("M2_X", "true");
+ t->SetBranchAddress("M2_X", &M2_X, &b_M2_X);
+ t->SetBranchStatus("M2_Y", "true");
+ t->SetBranchAddress("M2_Y", &M2_Y, &b_M2_Y);
+ t->SetBranchStatus("M2_Z", "true");
+ t->SetBranchAddress("M2_Z", &M2_Z, &b_M2_Z);
+
+ TH1F* hExTot = new TH1F("hExTot", "hExTot", 1000, -100, 100);
+ TH1F* hEx5Li = new TH1F("hEx5Li", "hEx5Li", 1000, -100, 100);
+
+ TH2F* hE1E2 = new TH2F("hE1E2", "hE1E2", 1000, 0, 500, 1000, 0, 500);
+
+ ////////////////////////////////////////////////////////////////////////////////
+ // int n_entries = t->GetEntries();
+ int n_entries = 1e7;
+ for (unsigned int i = 0; i < n_entries; i++) {
+ t->GetEntry(i);
+
+ double e_alpha;
+ double theta_alpha;
+ double phi_alpha;
+
+ double e_proton;
+ double theta_proton;
+ double phi_proton;
+
+ double e_fragment;
+ double theta_fragment;
+ double phi_fragment;
+
+ double xtarget = 0;
+ double ytarget = 0;
+ double CATSX_diff = 0;
+ double CATSY_diff = 0;
+
+ if (CATS1_X > -1500 && CATS2_X > -1500 && Xf > -1500) {
+ CATSX_diff = -(CATS2_X - CATS1_X);
+ xtarget = -Xf;
+ }
+ if (CATS1_Y > -1500 && CATS2_X > -1500 && Yf > -1500) {
+ ytarget = Yf;
+ CATSY_diff = CATS2_X - CATS1_X;
+ }
+
+ TVector3 BeamImpact(xtarget, ytarget, 0);
+ TVector3 BeamDirection(CATSX_diff, CATSY_diff, 497.1);
+
+ if (M2->Si_E.size() == 2) {
+ if ((cuta->IsInside(M2->CsI_E[0], M2->Si_E[0]) && cutp->IsInside(M2->CsI_E[1], M2->Si_E[1]))) {
+ // Particle1 = alpha
+ TVector3 PositionOfInteraction_alpha(M2_X->at(0), M2_Y->at(0), M2_Z->at(0));
+ TVector3 HitDirection_alpha = PositionOfInteraction_alpha - BeamImpact;
+ e_alpha = ELab->at(0);
+ theta_alpha = HitDirection_alpha.Angle(BeamDirection);
+ phi_alpha = HitDirection_alpha.Phi();
+
+ // Particle2 = proton
+ TVector3 PositionOfInteraction_proton(M2_X->at(1), M2_Y->at(1), M2_Z->at(1));
+ TVector3 HitDirection_proton = PositionOfInteraction_proton - BeamImpact;
+ e_proton = ELab->at(1);
+ theta_proton = HitDirection_proton.Angle(BeamDirection);
+ phi_proton = HitDirection_proton.Phi();
+ }
+ else if (cuta->IsInside(M2->CsI_E[1], M2->Si_E[1]) && cutp->IsInside(M2->CsI_E[0], M2->Si_E[0])) {
+ // Particle2 = alpha
+ TVector3 PositionOfInteraction_alpha(M2_X->at(1), M2_Y->at(1), M2_Z->at(1));
+ TVector3 HitDirection_alpha = PositionOfInteraction_alpha - BeamImpact;
+ e_alpha = ELab->at(1);
+ theta_alpha = HitDirection_alpha.Angle(BeamDirection);
+ phi_alpha = HitDirection_alpha.Phi();
+
+ // Particle1 = proton
+ TVector3 PositionOfInteraction_proton(M2_X->at(0), M2_Y->at(0), M2_Z->at(0));
+ TVector3 HitDirection_proton = PositionOfInteraction_proton - BeamImpact;
+ e_proton = ELab->at(0);
+ theta_proton = HitDirection_proton.Angle(BeamDirection);
+ phi_proton = HitDirection_proton.Phi();
+ }
+
+ ////////////////////////////////////////////////////////////////////////////////
+ double gamma_alpha = e_alpha / m_alpha + 1;
+ double beta_alpha = sqrt(1 - 1 / (pow(gamma_alpha, 2.)));
+ double p_alpha_mag = gamma_alpha * m_alpha * beta_alpha;
+ double etot_alpha = sqrt(pow(p_alpha_mag, 2) + pow(m_alpha, 2));
+
+ TVector3 p_alpha(sin(theta_alpha) * cos(phi_alpha), // px
+ sin(theta_alpha) * sin(phi_alpha), // py
+ cos(theta_alpha)); // pz
+ p_alpha.SetMag(p_alpha_mag);
+ LV_alpha.SetPxPyPzE(p_alpha.x(), p_alpha.y(), p_alpha.z(), etot_alpha);
+
+ ////////////////////////////////////////////////////////////////////////////////
+ double gamma_proton = e_proton / m_proton + 1;
+ double beta_proton = sqrt(1 - 1 / (pow(gamma_proton, 2.)));
+ double p_proton_mag = gamma_proton * m_proton * beta_proton;
+ double etot_proton = sqrt(pow(p_proton_mag, 2) + pow(m_proton, 2));
+
+ TVector3 p_proton(sin(theta_proton) * cos(phi_proton), // px
+ sin(theta_proton) * sin(phi_proton), // py
+ cos(theta_proton)); // pz
+ p_proton.SetMag(p_proton_mag);
+ LV_proton.SetPxPyPzE(p_proton.x(), p_proton.y(), p_proton.z(), etot_proton);
+ TLorentzVector LV_total = LV_alpha + LV_proton;
+
+ double ExTot = LV_total.Mag() - m_alpha - m_proton;
+ hExTot->Fill(ExTot);
+ if (Ex.size() >= 2) {
+ hEx->Fill(Ex.at(0));
+ hEx->Fill(Ex.at(1));
+ }
+ hE1E2->Fill(e_alpha, e_proton);
+ }
+ }
+ TCanvas* c1 = new TCanvas();
+ hExTot->Draw();
+ hEx->Draw("same");
+}
+~
--
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