X-Git-Url: http://git.uio.no/git/?p=u%2Fmrichter%2FAliRoot.git;a=blobdiff_plain;f=FMD%2Fscripts%2FDrawHits.C;h=6845cf4474f68450489cefdac2cbe1c7fe525c9b;hp=98e3a39afb19e8b831cb0d6f2d74abb5fdc193da;hb=2b893216a60932c634827f02a8ba890f816fdc38;hpb=df13787611bde89905226043267f05d21ebea8bd

diff --git a/FMD/scripts/DrawHits.C b/FMD/scripts/DrawHits.C
index 98e3a39afb1..6845cf4474f 100644
--- a/FMD/scripts/DrawHits.C
+++ b/FMD/scripts/DrawHits.C
@@ -20,6 +20,12 @@
 #include <TParticle.h>
 #include <TCanvas.h>
 #include <TGraphErrors.h>
+#include <TDatabasePDG.h>
+#include <TParticlePDG.h>
+#include <TLegend.h>
+#include <TArrow.h>
+#include <TLatex.h>
+#include <TF1.h>
 
 /** @class DrawHits
     @brief Draw hit energy loss
@@ -35,7 +41,10 @@ class DrawHits : public AliFMDInput
 {
 private:
   TH2D* fElossVsPMQ; // Histogram 
-  Int_t fPdg;
+  TH1D* fEloss;
+  TParticlePDG* fPdg;
+  const Double_t fRho;
+  const Double_t fBetaGammaMip;
 public:
   //__________________________________________________________________
   TArrayF MakeLogScale(Int_t n, Double_t min, Double_t max) 
@@ -55,23 +64,34 @@ public:
     return bins;
   }
   //__________________________________________________________________
-  DrawHits(Int_t m=1000, Double_t emin=1, Double_t emax=1000, 
-	   Int_t n=900, Double_t tmin=1e-2, Double_t tmax=1e3, 
-	   Int_t pdg=211) 
-    : fPdg(pdg)
+  DrawHits(const char* pdgName="pi+",
+	   Int_t m=1000, Double_t emin=1, Double_t emax=1000, 
+	   Int_t n=900, Double_t tmin=1e-2, Double_t tmax=1e3) 
+    : fPdg(0), 
+      fRho(2.33),
+      fBetaGammaMip(3.4601)
   { 
     AddLoad(kKinematics);
     AddLoad(kHits);
+    TDatabasePDG* pdgDB = TDatabasePDG::Instance();
+    fPdg                = pdgDB->GetParticle(pdgName);
+    if (!fPdg) Warning("DrawHits", "Particle %s not found", pdgName);
+
     TArrayF tkine(MakeLogScale(n, tmin, tmax));
     TArrayF eloss(MakeLogScale(m, emin, emax));
-    TString name(Form("elossVsP%s", (fPdg == 0 ? "MQ" : "")));
-    TString title(Form("#Delta E/#Delta x vs. p%s", 
-		       (fPdg == 0 ? "/(mq^{2})" : "")));
+    TString name("elossVsPMQ");
+    TString title(Form("#Delta E/#Delta x / q^{2} vs. p/m, %s", 
+		       (pdgName ? pdgName : "")));
     fElossVsPMQ = new TH2D(name.Data(), title.Data(), 
 			   tkine.fN-1, tkine.fArray, 
 			   eloss.fN-1, eloss.fArray);
-    fElossVsPMQ->SetXTitle(Form("p%s", (fPdg == 0 ? "/(mq^{2})" : " [GeV]")));
-    fElossVsPMQ->SetYTitle("#Delta E/#Delta x [MeV/cm]");
+    fElossVsPMQ->SetXTitle("p/(mq^{2})=#beta#gamma/q^{2}");
+    fElossVsPMQ->SetYTitle("#Delta E/#Delta x / q^{2} [MeV/cm]");
+    fEloss = new TH1D("eloss", "#Delta E/#Delta x / q^{2}", 
+		      eloss.fN-1, eloss.fArray);
+    fEloss->SetFillColor(2);
+    fEloss->SetFillStyle(3001);
+    fEloss->SetXTitle("#Delta E/#Delta x / q^{2} [MeV/cm]");
   }
   //__________________________________________________________________
   Bool_t ProcessHit(AliFMDHit* hit, TParticle* p) 
@@ -87,235 +107,452 @@ public:
     }
     if (!p->IsPrimary()) return kTRUE;
     if (hit->IsStop()) return kTRUE;
+
     Float_t x = hit->P();
     Float_t y = hit->Edep()/hit->Length();
-    if (fPdg != 0) {
-      if (TMath::Abs(hit->Pdg()) != fPdg) return kTRUE;
-    }
-    else {
-      Float_t q = hit->Q() / 3.;
-      if (hit->M() == 0 || q == 0) return kTRUE;
-      x /= hit->M();
-      y /= q * q;
-    }
+    Float_t q = hit->Q() / 3.;
+    Float_t m = hit->M();
+    if (m == 0 || q == 0) return kTRUE;
+
+    x /= hit->M();
+    y /= q * q;
     fElossVsPMQ->Fill(x, y);
+    fEloss->Fill(y);
+
     return kTRUE;
   }
   //__________________________________________________________________
   Bool_t Finish()
   {
-    TCanvas* c = new TCanvas("c", "C");
-    c->SetLogy();
-    c->SetLogx();
     gStyle->SetPalette(1);
-    gStyle->SetOptTitle(0);
+    // gStyle->SetOptTitle(0);
+    gStyle->SetTitleBorderSize(1);
+    gStyle->SetTitleFillColor(0);
+    gStyle->SetCanvasColor(0);
     gStyle->SetCanvasColor(0);
     gStyle->SetCanvasBorderSize(0);
     gStyle->SetPadColor(0);
     gStyle->SetPadBorderSize(0);
+    TCanvas* c = new TCanvas("elossVsP", "Energy loss versus momentum");
+    c->SetLogy();
+    c->SetLogx();
+
+    TString title(fElossVsPMQ->GetTitle());
+    title.Append(Form(", %d events", fEventCount));
+    fElossVsPMQ->SetTitle(title.Data());
     fElossVsPMQ->SetStats(kFALSE);
-    fElossVsPMQ->Draw("COLZ box");
+    fElossVsPMQ->Draw("AXIS");
+    fElossVsPMQ->Draw("ACOLZ same");
+    TGraph*  mate    = FromGFMATE();
+    TGraph*  bb      = FromRPPFull();
+    TGraph*  nodelta = FromRPPNoDelta();
+    TGraph*  norad   = FromRPPNoRad();
+    TGraph*  mean    = FromRPPMean();
+    // fElossVsPMQ->Draw("ACOLZ same");
+    TLegend* l       = new TLegend(.5, .6, .89, .89);
+    // l->AddEntry(fElossVsPMQ, fElossVsPMQ->GetTitle(), "pf");
+    l->AddEntry(mate,        mate->GetTitle(),    "lf");
+    l->AddEntry(bb,          bb->GetTitle(),      "l");
+    l->AddEntry(nodelta,     nodelta->GetTitle(), "l");
+    l->AddEntry(norad,       norad->GetTitle(),   "l");
+    l->AddEntry(mean,        mean->GetTitle(),    "l");
+    l->Draw("same");
+    Double_t min = fElossVsPMQ->GetYaxis()->GetFirst();
+    TArrow* a = new TArrow(fBetaGammaMip, min, fBetaGammaMip, 35*min, 03, "<|");
+    a->SetAngle(30);
+    a->Draw("same");
+    TLatex* t = new TLatex(fBetaGammaMip, 40*min, "Minimum Ionising");
+    t->SetTextSize(0.04);
+    t->SetTextAlign(21);
+    t->Draw("same");
     c->Modified();
     c->Update();
     c->cd();
+
+    c = new TCanvas("eloss", "Energy loss per unit material");
+    // c->SetLogx();
+    c->SetLogy();
+    fEloss->GetXaxis()->SetRangeUser(1, 10);
+    fEloss->Fit("landau", "", "", 1, 10);
+    TF1* land = fEloss->GetFunction("landau");
+    land->SetLineWidth(2);
+    Double_t max = fEloss->GetMaximum();
+    TGraph* resp  = GetResp();
+    Double_t* x   = resp->GetX();
+    Double_t* y   = resp->GetY();
+    TGraph*   g   = new TGraph(resp->GetN());
+    TGraph*   co  = GetCorr();
+    std::cout << "Correction factor: " << co->Eval(fBetaGammaMip) << std::endl;
+    Double_t  xs  = fRho; // * 1.19; // / 
+    for (Int_t i = 0; i < g->GetN(); i++) 
+      g->SetPoint(i, x[i] * xs, y[i] * max);
+    g->Draw("C same");
+
+    l = new TLegend(.6, .6, .89, .89);
+    l->AddEntry(fEloss, fEloss->GetTitle(), "lf");
+    l->AddEntry(land,   "Landau fit", "l");
+    l->AddEntry(resp,   "f(#Delta_{p}/x) [RPP fig 27.8]");
+    l->Draw("same");
+
     return kTRUE;
   }
-  void SuperImposeBetheBloc() 
+
+  /** Scale a graph by density (multiply) and mass (divide). 
+      @param graph Graph to scale 
+      @param density If @c true, scale by the Si density
+      ($\rho=2.33$/cm^3$).  The y axis is assumed to have units of
+      $MeVg^{-1}cm^2$. 
+      @param mass Mass to scale with. The x axis is assumed to be the
+      kinetic energy of the particles in units of $GeV$.  */
+  void ScaleGraph(TGraph* graph, bool density=true, double mass=1) 
+  {
+      Double_t*      x   = graph->GetX();
+      Double_t*      y   = graph->GetY();
+      const Double_t rho = (density ? fRho : 1);
+      for (Int_t i = 0; i < graph->GetN(); i++) 
+	graph->SetPoint(i, x[i] / mass, y[i] * rho); 
+  }    
+  /** Draw pure Bethe-Bloc from Review of Particle Physics, fig. 27.1 
+      @return TGraph object */ 
+  TGraph* FromRPPFull() 
+  {
+    static TGraph* graph = 0;
+    if (!graph) { 
+      graph = new TGraph(20);
+      graph->GetHistogram()->SetXTitle("#beta#gamma");
+      graph->GetHistogram()->SetYTitle("#Delta E/#Delta x [MeV/cm]");
+      graph->SetFillColor(0);
+      graph->SetLineColor(2);
+      graph->SetLineStyle(1);
+      graph->SetLineWidth(1);
+      graph->SetName("full_stop");
+      graph->SetTitle("Stopping (MeVcm^{2}/g) [RPP fig 27.1]");
+      graph->SetPoint(0,0.001461622,40.17542);
+      graph->SetPoint(1,0.003775053,91.28429);
+      graph->SetPoint(2,0.01178769,202.7359);
+      graph->SetPoint(3,0.01722915,212.1938);
+      graph->SetPoint(4,0.03162278,172.8318);
+      graph->SetPoint(5,0.06028646,91.28429);
+      graph->SetPoint(6,0.09506529,51.62633);
+      graph->SetPoint(7,0.433873,5.281682);
+      graph->SetPoint(8,1.255744,1.808947);
+      graph->SetPoint(9,2.393982,1.440177);
+      graph->SetPoint(10,3.499097,1.407715);
+      graph->SetPoint(11,10.92601,1.542122);
+      graph->SetPoint(12,60.28646,1.85066);
+      graph->SetPoint(13,236.3885,2.121938);
+      graph->SetPoint(14,468.0903,2.324538);
+      graph->SetPoint(15,1208.976,2.987085);
+      graph->SetPoint(16,6670.768,7.961412);
+      graph->SetPoint(17,23341.67,24.3298);
+      graph->SetPoint(18,110651.2,104.6651);
+      graph->SetPoint(19,264896.9,260.5203);
+      ScaleGraph(graph);
+    }
+    graph->Draw("C same");
+    return graph;
+  }
+
+  /** Draw pure Bethe-Bloc from Review of Particle Physics, fig. 27.1,
+      but without delta electrons  
+      @return TGraph object */ 
+  TGraph* FromRPPNoDelta() 
   {
-    // This is for pi+, made with MakeXsection.C and DrawXsection.C
-    TGraphErrors *gre = new TGraphErrors(91);
-    gre->SetName("BetheBlocPi");
-    gre->SetTitle("BetheBlocPi");
-    gre->SetFillColor(6);
-    gre->SetFillStyle(3001);
-    gre->SetLineWidth(2);
-    gre->SetPoint(0,7.16486e-05,1218.84);
-    gre->SetPointError(0,0,609.418);
-    gre->SetPoint(1,9.25378e-05,1221.38);
-    gre->SetPointError(1,0,610.689);
-    gre->SetPoint(2,0.000119517,1180.12);
-    gre->SetPointError(2,0,590.058);
-    gre->SetPoint(3,0.000154362,1100.31);
-    gre->SetPointError(3,0,550.156);
-    gre->SetPoint(4,0.000199367,996.621);
-    gre->SetPointError(4,0,498.31);
-    gre->SetPoint(5,0.000257492,886.005);
-    gre->SetPointError(5,0,443.003);
-    gre->SetPoint(6,0.000332563,780.483);
-    gre->SetPointError(6,0,390.241);
-    gre->SetPoint(7,0.000429522,684.927);
-    gre->SetPointError(7,0,342.463);
-    gre->SetPoint(8,0.000554749,599.407);
-    gre->SetPointError(8,0,299.703);
-    gre->SetPoint(9,0.000716486,522.375);
-    gre->SetPointError(9,0,261.187);
-    gre->SetPoint(10,0.000925378,452.497);
-    gre->SetPointError(10,0,226.249);
-    gre->SetPoint(11,0.00119517,389.101);
-    gre->SetPointError(11,0,194.551);
-    gre->SetPoint(12,0.00154362,331.974);
-    gre->SetPointError(12,0,165.987);
-    gre->SetPoint(13,0.00199367,280.969);
-    gre->SetPointError(13,0,140.485);
-    gre->SetPoint(14,0.00257492,235.689);
-    gre->SetPointError(14,0,117.844);
-    gre->SetPoint(15,0.00332564,196.156);
-    gre->SetPointError(15,0,98.078);
-    gre->SetPoint(16,0.00429522,162.402);
-    gre->SetPointError(16,0,81.2012);
-    gre->SetPoint(17,0.00554749,133.87);
-    gre->SetPointError(17,0,66.9351);
-    gre->SetPoint(18,0.00716486,109.959);
-    gre->SetPointError(18,0,54.9797);
-    gre->SetPoint(19,0.00925378,90.2035);
-    gre->SetPointError(19,0,45.1017);
-    gre->SetPoint(20,0.0119517,74.1317);
-    gre->SetPointError(20,0,37.0658);
-    gre->SetPoint(21,0.0154362,60.8988);
-    gre->SetPointError(21,0,30.4494);
-    gre->SetPoint(22,0.0199367,49.9915);
-    gre->SetPointError(22,0,24.9957);
-    gre->SetPoint(23,0.0257492,40.9812);
-    gre->SetPointError(23,0,20.4906);
-    gre->SetPoint(24,0.0332564,33.5739);
-    gre->SetPointError(24,0,16.7869);
-    gre->SetPoint(25,0.0429522,27.5127);
-    gre->SetPointError(25,0,13.7563);
-    gre->SetPoint(26,0.0554749,22.5744);
-    gre->SetPointError(26,0,11.2872);
-    gre->SetPoint(27,0.0716486,18.5674);
-    gre->SetPointError(27,0,9.28372);
-    gre->SetPoint(28,0.0925378,15.3292);
-    gre->SetPointError(28,0,7.66462);
-    gre->SetPoint(29,0.119517,12.7231);
-    gre->SetPointError(29,0,6.36156);
-    gre->SetPoint(30,0.154362,10.6352);
-    gre->SetPointError(30,0,5.31759);
-    gre->SetPoint(31,0.199367,8.97115);
-    gre->SetPointError(31,0,4.48558);
-    gre->SetPoint(32,0.257492,7.65358);
-    gre->SetPointError(32,0,3.82679);
-    gre->SetPoint(33,0.332564,6.61909);
-    gre->SetPointError(33,0,3.30955);
-    gre->SetPoint(34,0.429522,5.81614);
-    gre->SetPointError(34,0,2.90807);
-    gre->SetPoint(35,0.554749,5.20286);
-    gre->SetPointError(35,0,2.60143);
-    gre->SetPoint(36,0.716486,4.74533);
-    gre->SetPointError(36,0,2.37267);
-    gre->SetPoint(37,0.925378,4.40987);
-    gre->SetPointError(37,0,2.20494);
-    gre->SetPoint(38,1.19517,4.17077);
-    gre->SetPointError(38,0,2.08538);
-    gre->SetPoint(39,1.54362,4.014);
-    gre->SetPointError(39,0,2.007);
-    gre->SetPoint(40,1.99367,3.92577);
-    gre->SetPointError(40,0,1.96288);
-    gre->SetPoint(41,2.57492,3.89199);
-    gre->SetPointError(41,0,1.946);
-    gre->SetPoint(42,3.32564,3.90063);
-    gre->SetPointError(42,0,1.95032);
-    gre->SetPoint(43,4.29522,3.94146);
-    gre->SetPointError(43,0,1.97073);
-    gre->SetPoint(44,5.54749,4.00597);
-    gre->SetPointError(44,0,2.00299);
-    gre->SetPoint(45,7.16486,4.08725);
-    gre->SetPointError(45,0,2.04362);
-    gre->SetPoint(46,9.25378,4.17985);
-    gre->SetPointError(46,0,2.08993);
-    gre->SetPoint(47,11.9517,4.27962);
-    gre->SetPointError(47,0,2.13981);
-    gre->SetPoint(48,15.4362,4.38347);
-    gre->SetPointError(48,0,2.19174);
-    gre->SetPoint(49,19.9367,4.48919);
-    gre->SetPointError(49,0,2.2446);
-    gre->SetPoint(50,25.7492,4.59523);
-    gre->SetPointError(50,0,2.29762);
-    gre->SetPoint(51,33.2564,4.70052);
-    gre->SetPointError(51,0,2.35026);
-    gre->SetPoint(52,42.9522,4.80435);
-    gre->SetPointError(52,0,2.40218);
-    gre->SetPoint(53,55.4749,4.90625);
-    gre->SetPointError(53,0,2.45312);
-    gre->SetPoint(54,71.6486,5.00589);
-    gre->SetPointError(54,0,2.50295);
-    gre->SetPoint(55,92.5378,5.10279);
-    gre->SetPointError(55,0,2.55139);
-    gre->SetPoint(56,119.517,5.19654);
-    gre->SetPointError(56,0,2.59827);
-    gre->SetPoint(57,154.362,5.28758);
-    gre->SetPointError(57,0,2.64379);
-    gre->SetPoint(58,199.367,5.37581);
-    gre->SetPointError(58,0,2.6879);
-    gre->SetPoint(59,257.492,5.46109);
-    gre->SetPointError(59,0,2.73055);
-    gre->SetPoint(60,332.564,5.54335);
-    gre->SetPointError(60,0,2.77167);
-    gre->SetPoint(61,429.522,5.62248);
-    gre->SetPointError(61,0,2.81124);
-    gre->SetPoint(62,554.749,5.69843);
-    gre->SetPointError(62,0,2.84922);
-    gre->SetPoint(63,716.486,5.77122);
-    gre->SetPointError(63,0,2.88561);
-    gre->SetPoint(64,925.378,5.84093);
-    gre->SetPointError(64,0,2.92046);
-    gre->SetPoint(65,1195.17,5.9077);
-    gre->SetPointError(65,0,2.95385);
-    gre->SetPoint(66,1543.62,5.97165);
-    gre->SetPointError(66,0,2.98582);
-    gre->SetPoint(67,1993.67,6.03292);
-    gre->SetPointError(67,0,3.01646);
-    gre->SetPoint(68,2574.92,6.09171);
-    gre->SetPointError(68,0,3.04586);
-    gre->SetPoint(69,3325.64,6.14827);
-    gre->SetPointError(69,0,3.07413);
-    gre->SetPoint(70,4295.22,6.20286);
-    gre->SetPointError(70,0,3.10143);
-    gre->SetPoint(71,5547.49,6.25577);
-    gre->SetPointError(71,0,3.12788);
-    gre->SetPoint(72,7164.86,6.30725);
-    gre->SetPointError(72,0,3.15363);
-    gre->SetPoint(73,9253.78,6.35757);
-    gre->SetPointError(73,0,3.17878);
-    gre->SetPoint(74,11951.7,6.38446);
-    gre->SetPointError(74,0,3.19223);
-    gre->SetPoint(75,15436.2,6.38446);
-    gre->SetPointError(75,0,3.19223);
-    gre->SetPoint(76,19936.7,6.38446);
-    gre->SetPointError(76,0,3.19223);
-    gre->SetPoint(77,25749.2,6.38446);
-    gre->SetPointError(77,0,3.19223);
-    gre->SetPoint(78,33256.4,6.38446);
-    gre->SetPointError(78,0,3.19223);
-    gre->SetPoint(79,42952.2,6.38446);
-    gre->SetPointError(79,0,3.19223);
-    gre->SetPoint(80,55474.9,6.38446);
-    gre->SetPointError(80,0,3.19223);
-    gre->SetPoint(81,71648.6,6.38446);
-    gre->SetPointError(81,0,3.19223);
-    gre->SetPoint(82,92537.8,6.38446);
-    gre->SetPointError(82,0,3.19223);
-    gre->SetPoint(83,119517,6.38446);
-    gre->SetPointError(83,0,3.19223);
-    gre->SetPoint(84,154362,6.38446);
-    gre->SetPointError(84,0,3.19223);
-    gre->SetPoint(85,199367,6.38446);
-    gre->SetPointError(85,0,3.19223);
-    gre->SetPoint(86,257492,6.38446);
-    gre->SetPointError(86,0,3.19223);
-    gre->SetPoint(87,332563,6.38446);
-    gre->SetPointError(87,0,3.19223);
-    gre->SetPoint(88,429522,6.38446);
-    gre->SetPointError(88,0,3.19223);
-    gre->SetPoint(89,554749,6.38446);
-    gre->SetPointError(89,0,3.19223);
-    gre->SetPoint(90,716486,6.38446);
-    gre->SetPointError(90,0,3.19223);
-    gre->Draw("l same");
-    gre->DrawClone("l3 same");
-    gPad->Modified();
-    gPad->Update();
-    gPad->cd();
+    static TGraph* graph = 0;
+    if (!graph) { 
+      graph = new TGraph(20);
+      graph->SetName("stop_nodelta");
+      graph->SetTitle("Stopping w/o #delta's [RPP fig 27.1]");
+      graph->GetHistogram()->SetYTitle("(MeVcm^{2}/g)");
+      graph->GetHistogram()->SetXTitle("#beta#gamma");
+      graph->SetFillColor(0);
+      graph->SetLineColor(3);
+      graph->SetLineStyle(1);
+      graph->SetLineWidth(1);
+      graph->SetPoint(0,0.001461622,40.17542);
+      graph->SetPoint(1,0.003775053,91.28429);
+      graph->SetPoint(2,0.01178769,202.7359);
+      graph->SetPoint(3,0.01722915,212.1938);
+      graph->SetPoint(4,0.03162278,172.8318);
+      graph->SetPoint(5,0.06028646,91.28429);
+      graph->SetPoint(6,0.09506529,51.62633);
+      graph->SetPoint(7,0.433873,5.281682);
+      graph->SetPoint(8,1.255744,1.808947);
+      graph->SetPoint(9,2.304822,1.473387);
+      graph->SetPoint(10,3.921088,1.473387);
+      graph->SetPoint(11,8.064796,1.614064);
+      graph->SetPoint(12,26.15667,1.936996);
+      graph->SetPoint(13,264.8969,2.489084);
+      graph->SetPoint(14,544.8334,2.665278);
+      graph->SetPoint(15,1163.949,2.853945);
+      graph->SetPoint(16,5312.204,3.19853);
+      graph->SetPoint(17,15374.93,3.424944);
+      graph->SetPoint(18,49865.73,3.667384);
+      graph->SetPoint(19,634158.5,4.110185);
+      ScaleGraph(graph);
+    }
+    graph->Draw("C same");
+    return graph;
+  }
+
+  /** Draw pure Bethe-Bloc from Review of Particle Physics, fig. 27.1,
+      but without delta electrons  
+      @return TGraph object */ 
+  TGraph* FromRPPNoRad() 
+  {
+    static TGraph* graph = 0;
+    if (!graph) { 
+      graph = new TGraph(18);
+      graph->SetName("norad_stop");
+      graph->SetTitle("Stopping w/o radiative loss [RPP fig. 27.1]");
+      graph->GetHistogram()->SetYTitle("(MeVcm^{2}/g)");
+      graph->GetHistogram()->SetXTitle("#beta#gamma");
+      graph->SetFillColor(0);
+      graph->SetLineStyle(1);
+      graph->SetLineColor(4);
+      graph->SetLineWidth(1);
+      graph->SetPoint(0,0.001,24.3298);
+      graph->SetPoint(1,0.003117649,74.35105);
+      graph->SetPoint(2,0.008675042,172.8318);
+      graph->SetPoint(3,0.01782497,212.1938);
+      graph->SetPoint(4,0.02704573,189.3336);
+      graph->SetPoint(5,0.07481082,70.29816);
+      graph->SetPoint(6,0.3300035,8.524974);
+      graph->SetPoint(7,0.819559,2.489084);
+      graph->SetPoint(8,1.447084,1.651284);
+      graph->SetPoint(9,2.555097,1.440177);
+      graph->SetPoint(10,4.026598,1.407715);
+      graph->SetPoint(11,32.38084,1.728318);
+      graph->SetPoint(12,97.19733,1.893336);
+      graph->SetPoint(13,1732.539,2.170869);
+      graph->SetPoint(14,11098.58,2.324538);
+      graph->SetPoint(15,32075.46,2.378141);
+      graph->SetPoint(16,221655.8,2.546482);
+      graph->SetPoint(17,593830.6,2.605203);
+      ScaleGraph(graph);
+    }
+    graph->Draw("C same");
+    return graph;
+  }
+
+  /** Draw pure Bethe-Bloc from Review of Particle Physics, fig. 27.6 
+      @return TGraph object */ 
+  TGraph* FromRPPMean() 
+  {
+    static TGraph* graph = 0;
+    if (!graph) { 
+      graph = new TGraph(12);
+      graph->SetName("mean_eloss");
+      graph->SetTitle("Mean #Delta E/#Delta x - electronic only  [RPP fig. 27.6]");
+      graph->GetHistogram()->SetYTitle("(MeVcm^{2}/g)");
+      graph->GetHistogram()->SetXTitle("#mu E_{kin} (GeV)");
+      graph->SetFillColor(1);
+      graph->SetLineStyle(1);
+      graph->SetLineWidth(1);
+      graph->SetLineColor(1);
+      graph->SetMarkerStyle(21);
+      graph->SetMarkerSize(0.6);
+      graph->SetPoint(0,0.1,1.346561);
+      graph->SetPoint(1,0.1435819,1.230159);
+      graph->SetPoint(2,0.2061576,1.156085);
+      graph->SetPoint(3,0.3698076,1.124339);
+      graph->SetPoint(4,0.4620113,1.124339);
+      graph->SetPoint(5,0.8521452,1.145503);
+      graph->SetPoint(6,1.909707,1.177249);
+      graph->SetPoint(7,4.048096,1.198413);
+      graph->SetPoint(8,12.66832,1.219577);
+      graph->SetPoint(9,48.17031,1.230159);
+      graph->SetPoint(10,285.8863,1.230159);
+      graph->SetPoint(11,894.6674,1.230159);
+      const Double_t m   = 0.10566; // Muon 
+      ScaleGraph(graph, true, m);
+    }
+    graph->Draw("C same");
+    return graph;
+  }
+
+  /** Draw energy loss as obtained from GEANT 3.21 GFMATE. 
+      @return TGraph object */
+  TGraph* FromGFMATE() 
+  {
+    static TGraphErrors* gre = 0;
+    if (!gre) {
+      gre = new TGraphErrors(91);
+      gre->SetName("ELOSS");
+      gre->SetTitle("Energy loss 300#mu Si [GFMATE]");
+      gre->GetHistogram()->SetXTitle("#beta#gamma");
+      gre->GetHistogram()->SetYTitle("#Delta E/#Delta x [MeV/cm]");
+      gre->SetFillColor(6);
+      gre->SetFillStyle(3002);
+      gre->SetLineColor(1);
+      gre->SetLineStyle(1);
+      gre->SetLineWidth(1);
+      gre->SetPoint(0,7.16486e-05,1218.84);
+      gre->SetPoint(1,9.25378e-05,1221.38);
+      gre->SetPoint(2,0.000119517,1180.12);
+      gre->SetPoint(3,0.000154362,1100.31);
+      gre->SetPoint(4,0.000199367,996.621);
+      gre->SetPoint(5,0.000257492,886.005);
+      gre->SetPoint(6,0.000332563,780.483);
+      gre->SetPoint(7,0.000429522,684.927);
+      gre->SetPoint(8,0.000554749,599.407);
+      gre->SetPoint(9,0.000716486,522.375);
+      gre->SetPoint(10,0.000925378,452.497);
+      gre->SetPoint(11,0.00119517,389.101);
+      gre->SetPoint(12,0.00154362,331.974);
+      gre->SetPoint(13,0.00199367,280.969);
+      gre->SetPoint(14,0.00257492,235.689);
+      gre->SetPoint(15,0.00332564,196.156);
+      gre->SetPoint(16,0.00429522,162.402);
+      gre->SetPoint(17,0.00554749,133.87);
+      gre->SetPoint(18,0.00716486,109.959);
+      gre->SetPoint(19,0.00925378,90.2035);
+      gre->SetPoint(20,0.0119517,74.1317);
+      gre->SetPoint(21,0.0154362,60.8988);
+      gre->SetPoint(22,0.0199367,49.9915);
+      gre->SetPoint(23,0.0257492,40.9812);
+      gre->SetPoint(24,0.0332564,33.5739);
+      gre->SetPoint(25,0.0429522,27.5127);
+      gre->SetPoint(26,0.0554749,22.5744);
+      gre->SetPoint(27,0.0716486,18.5674);
+      gre->SetPoint(28,0.0925378,15.3292);
+      gre->SetPoint(29,0.119517,12.7231);
+      gre->SetPoint(30,0.154362,10.6352);
+      gre->SetPoint(31,0.199367,8.97115);
+      gre->SetPoint(32,0.257492,7.65358);
+      gre->SetPoint(33,0.332564,6.61909);
+      gre->SetPoint(34,0.429522,5.79837);
+      gre->SetPoint(35,0.554749,5.148);
+      gre->SetPoint(36,0.716486,4.65024);
+      gre->SetPoint(37,0.925378,4.27671);
+      gre->SetPoint(38,1.19517,3.99831);
+      gre->SetPoint(39,1.54362,3.79877);
+      gre->SetPoint(40,1.99367,3.6629);
+      gre->SetPoint(41,2.57492,3.57594);
+      gre->SetPoint(42,3.32564,3.52565);
+      gre->SetPoint(43,4.29522,3.50206);
+      gre->SetPoint(44,5.54749,3.49715);
+      gre->SetPoint(45,7.16486,3.50467);
+      gre->SetPoint(46,9.25378,3.51988);
+      gre->SetPoint(47,11.9517,3.53932);
+      gre->SetPoint(48,15.4362,3.56054);
+      gre->SetPoint(49,19.9367,3.58189);
+      gre->SetPoint(50,25.7492,3.60231);
+      gre->SetPoint(51,33.2564,3.62113);
+      gre->SetPoint(52,42.9522,3.638);
+      gre->SetPoint(53,55.4749,3.65275);
+      gre->SetPoint(54,71.6486,3.66537);
+      gre->SetPoint(55,92.5378,3.67586);
+      gre->SetPoint(56,119.517,3.68433);
+      gre->SetPoint(57,154.362,3.69105);
+      gre->SetPoint(58,199.367,3.6962);
+      gre->SetPoint(59,257.492,3.69997);
+      gre->SetPoint(60,332.564,3.70257);
+      gre->SetPoint(61,429.522,3.70421);
+      gre->SetPoint(62,554.749,3.70511);
+      gre->SetPoint(63,716.486,3.7055);
+      gre->SetPoint(64,925.378,3.70559);
+      gre->SetPoint(65,1195.17,3.70558);
+      gre->SetPoint(66,1543.62,3.70557);
+      gre->SetPoint(67,1993.67,3.70555);
+      gre->SetPoint(68,2574.92,3.70553);
+      gre->SetPoint(69,3325.64,3.70552);
+      gre->SetPoint(70,4295.22,3.7055);
+      gre->SetPoint(71,5547.49,3.70548);
+      gre->SetPoint(72,7164.86,3.70547);
+      gre->SetPoint(73,9253.78,3.70545);
+      gre->SetPoint(74,11951.7,3.70544);
+      gre->SetPoint(75,15436.2,3.70544);
+      gre->SetPoint(76,19936.7,3.70544);
+      gre->SetPoint(77,25749.2,3.70544);
+      gre->SetPoint(78,33256.4,3.70544);
+      gre->SetPoint(79,42952.2,3.70544);
+      gre->SetPoint(80,55474.9,3.70544);
+      gre->SetPoint(81,71648.6,3.70544);
+      gre->SetPoint(82,92537.8,3.70544);
+      gre->SetPoint(83,119517,3.70544);
+      gre->SetPoint(84,154362,3.70544);
+      gre->SetPoint(85,199367,3.70544);
+      gre->SetPoint(86,257492,3.70544);
+      gre->SetPoint(87,332563,3.70544);
+      gre->SetPoint(88,429522,3.70544);
+      gre->SetPoint(89,554749,3.70544);
+      gre->SetPoint(90,716486,3.70544);
+      // Double_t* x = gre->GetX();
+      Double_t* y = gre->GetY();
+      for (Int_t i = 0; i < gre->GetN(); i++) 
+	gre->SetPointError(i, 0, 2 * 0.1 * y[i]); // ! 1 sigma
+    }
+    gre->DrawClone("c3 same");
+    return gre;
+  }
+
+  /** Get the response functin @f$ f(\Delta_p/x)@f$ from Review of
+      Particle Physics (fig. 27.2).  It is scaled to the value at
+      MPV. */ 
+  TGraph* GetResp()
+  {
+    static TGraph*  graph = 0;
+    if (!graph) {
+      graph = new TGraph(16);
+      graph->SetName("si_resp");
+      graph->SetTitle("f(#Delta_{p}/x) scaled to the MPV value ");
+      graph->GetHistogram()->SetXTitle("#Delta_{p}/x (MeVcm^{2}/g)");
+      graph->GetHistogram()->SetYTitle("f(#Delta_{p}/x)");
+      graph->SetFillColor(1);
+      graph->SetMarkerStyle(21);
+      graph->SetMarkerSize(0.6);
+      graph->SetPoint(0,0.8115124,0.009771987);
+      graph->SetPoint(1,0.9198646,0.228013);
+      graph->SetPoint(2,0.996614,0.5895765);
+      graph->SetPoint(3,1.041761,0.8241042);
+      graph->SetPoint(4,1.059819,0.8794788);
+      graph->SetPoint(5,1.077878,0.9348534);
+      graph->SetPoint(6,1.100451,0.980456);
+      graph->SetPoint(7,1.141084,0.9967427);
+      graph->SetPoint(8,1.204289,0.9153094);
+      graph->SetPoint(9,1.276524,0.742671);
+      graph->SetPoint(10,1.402935,0.465798);
+      graph->SetPoint(11,1.515801,0.3029316);
+      graph->SetPoint(12,1.73702,0.1465798);
+      graph->SetPoint(13,1.985327,0.08143322);
+      graph->SetPoint(14,2.301354,0.04234528);
+      graph->SetPoint(15,2.56772,0.02931596);
+    }
+    return graph;
+  }
+
+  /** Get the correction to Bethe-Bloc from Review of Particle Physics
+      (fig 27.8). 
+  */
+  TGraph* GetCorr() 
+  {
+    static TGraph* graph = 0;
+    if (!graph) {
+      graph = new TGraph(14);
+      graph->SetName("graph");
+      graph->SetTitle("(#Delta_{p}/x)/(dE/dx)|_{mip} for 320#mu Si");
+      graph->GetHistogram()->SetXTitle("#beta#gamma = p/m");
+      graph->SetFillColor(1);
+      graph->SetLineColor(7);
+      graph->SetMarkerStyle(21);
+      graph->SetMarkerSize(0.6);
+      graph->SetPoint(0,1.196058,0.9944915);
+      graph->SetPoint(1,1.28502,0.9411017);
+      graph->SetPoint(2,1.484334,0.8559322);
+      graph->SetPoint(3,1.984617,0.7491525);
+      graph->SetPoint(4,2.658367,0.6983051);
+      graph->SetPoint(5,3.780227,0.6779661);
+      graph->SetPoint(6,4.997358,0.6741525);
+      graph->SetPoint(7,8.611026,0.684322);
+      graph->SetPoint(8,15.28296,0.6995763);
+      graph->SetPoint(9,41.54516,0.7186441);
+      graph->SetPoint(10,98.91461,0.7288136);
+      graph->SetPoint(11,203.2734,0.7326271);
+      graph->SetPoint(12,505.6421,0.7338983);
+      graph->SetPoint(13,896.973,0.7338983);
+    }
+    return graph;
   }
   
   ClassDef(DrawHits,0);