- printf(" Entering AliZDC::Digits2Reco\n");
- AliDetector *ZDC = gAlice->GetDetector("ZDC");
- TClonesArray *ZDCdigits = ZDC->Digits();
-
- TTree *TD = 0;
- char treeDame[20];
- sprintf(treeDame,"TreeD%d",fMerger->EvNum());
- if(gAlice->GetTreeDFile()){
- TD = (TTree*)gAlice->GetTreeDFile()->Get(treeDame);
- }
- else {
- TD = gAlice->TreeD();
- }
- if(TD){
- char brname[20];
- sprintf(brname,"%s",ZDC->GetName());
- TBranch *br = TD->GetBranch(brname);
- if(br) br->SetAddress(&ZDCdigits);
- }
- else if(!TD) printf(" ERROR -> TreeD NOT found in gAlice object\n");
-
- Int_t nt = (Int_t) (TD->GetEntries());
- gAlice->ResetDigits();
-
- AliZDCDigit *dig;
- Int_t j, idig, ndigits, ZNraw=0, ZPraw=0, ZEMraw=0;
- // --- Summing raw ADCs for each detector to obtain total light
- for(j=0; j<nt; j++){
- TD->GetEvent(j);
- ndigits = ZDCdigits->GetEntries();
- ZNraw=0;
- ZPraw=0;
- ZEMraw=0;
- // --- Loop over event digits
- for(idig=0; idig<ndigits; idig++){
- dig = (AliZDCDigit*) ZDCdigits->UncheckedAt(idig);
- if(dig->GetSector(0) == 1) ZNraw += dig->GetADCValue();
- else if(dig->GetSector(0) == 2) ZPraw += dig->GetADCValue();
- else if(dig->GetSector(0) == 3) ZEMraw += dig->GetADCValue();
- } // Digits loop
- } // TreeD entries loop
- printf("\n --- ZNraw = %d, ZPraw = %d, ZEMraw = %d\n",ZNraw, ZPraw, ZEMraw);
-
- // --- Pedestal subtraction
- Int_t ZNcorr, ZPcorr, ZEMcorr, MeanPed=50;
- ZNcorr = ZNraw - 5*MeanPed;
- ZPcorr = ZPraw - 5*MeanPed;
- ZEMcorr = ZEMraw - 2*MeanPed;
- if(ZNcorr<0) ZNcorr=0;
- if(ZPcorr<0) ZPcorr=0;
- if(ZEMcorr<0) ZEMcorr=0;
- printf("\n ZNcorr = %d, ZPcorr = %d, ZEMcorr = %d\n",ZNcorr,ZPcorr,ZEMcorr);
-
- // --- ADCchannel -> photoelectrons
- // NB-> PM gain = 10^(5), ADC resolution = 6.4*10^(-7)
- Float_t ZNphe, ZPphe, ZEMphe, ConvFactor = 0.064;
- ZNphe = ZNcorr/ConvFactor;
- ZPphe = ZPcorr/ConvFactor;
- ZEMphe = ZEMcorr/ConvFactor;
- printf("\n ZNphe = %f, ZPphe = %f, ZEMphe = %f\n",ZNphe, ZPphe, ZEMphe);
-
- // --- Energy calibration
- // Conversion factors for hadronic ZDCs goes from phe yield to TRUE incident
- // energy (conversion from GeV to TeV is included); while for EM calos
- // conversion is from light yield to detected energy calculated by GEANT
- // NB -> ZN and ZP conversion factors are constant since incident spectators
- // have all the same energy, ZEM energy is obtained through a fit over the whole
- // range of incident particle energies (obtained with full HIJING simulations)
- Float_t ZNenergy, ZPenergy, ZEMenergy, ZDCenergy;
- Float_t ZNphexTeV=329., ZPphexTeV=369.;
- ZNenergy = ZNphe/ZNphexTeV;
- ZPenergy = ZPphe/ZPphexTeV;
- ZDCenergy = ZNenergy+ZPenergy;
- ZEMenergy = -4.81+0.3238*ZEMphe;
- if(ZEMenergy<0) ZEMenergy=0;
- printf(" ZNenergy = %f TeV, ZPenergy = %f TeV, ZDCenergy = %f GeV, "
- "\n ZEMenergy = %f TeV\n", ZNenergy, ZPenergy,
- ZDCenergy, ZEMenergy);
-
- if(ZDCenergy==0)
- printf("\n\n ### ATTENZIONE!!! -> ev# %d: ZNenergy = %f TeV, ZPenergy = %f TeV, ZDCenergy = %f GeV, "
- " ZEMenergy = %f TeV\n\n", fMerger->EvNum(), ZNenergy, ZPenergy, ZDCenergy, ZEMenergy);
-
- // --- Number of incident spectator nucleons
- Int_t NDetSpecN, NDetSpecP;
- NDetSpecN = (Int_t) (ZNenergy/2.760);
- NDetSpecP = (Int_t) (ZPenergy/2.760);
- printf("\n NDetSpecN = %d, NDetSpecP = %d\n",NDetSpecN, NDetSpecP);
-
- // --- Number of generated spectator nucleons and impact parameter
- // --------------------------------------------------------------------------------------------------
- // [1] ### Results in Chiara's PhD thesis -> 0<b<15 fm (Dec 2001)
- /*// Fit results for neutrons (Nspectator n true vs. EZN)
- TF1 *fZNCen = new TF1("fZNCen",
- "(-2.116909+sqrt(2.116909*2.116909-4*(-0.00651)*(14.556798-x)))/(2*(-0.00651))",0.,158.5);
- TF1 *fZNPer = new TF1("fZNPer",
- "(-34.695134-sqrt(34.695134*34.695134-4*(-0.174780)*(-1562.283443-x)))/(2*(-0.174780))",0.,158.5);
- // Fit results for protons (Nspectator p true vs. EZP)
- TF1 *fZPCen = new TF1("fZPCen",
- "(-1.3217+sqrt(1.3217*1.3217-4*(-0.007934)*(4.742873-x)))/(2*(-0.007934))",0.,58.91);
- TF1 *fZPPer = new TF1("fZPPer",
- "(-15.788267-sqrt(15.788267*15.788267-4*(-0.133359)*(-383.800673-x)))/(2*(-0.133359))",0.,58.91);
- // Fit results for total number of spectators (Nspectators true vs. EZDC)
- TF1 *fZDCCen = new TF1("fZDCCen",
- "(-1.867335+sqrt(1.867335*1.867335-4*(-0.004119)*(19.100289-x)))/(2*(-0.004119))",0.,220.4);
- TF1 *fZDCPer = new TF1("fZDCPer",
- "(-22.429097-sqrt(22.429097*22.429097-4*(-0.072435)*(-1482.034526-x)))/(2*(-0.072435))",0.,220.4);*/
- // --------------------------------------------------------------------------------------------------
- // [1] ### Results from a new production -> 0<b<18 fm (Apr 2002)
- // Fit results for neutrons (Nspectator n true vs. EZN)
- TF1 *fZNCen = new TF1("fZNCen",
- "(-2.287920+sqrt(2.287920*2.287920-4*(-0.007629)*(11.921710-x)))/(2*(-0.007629))",0.,164.);
- TF1 *fZNPer = new TF1("fZNPer",
- "(-37.812280-sqrt(37.812280*37.812280-4*(-0.190932)*(-1709.249672-x)))/(2*(-0.190932))",0.,164.);
- // Fit results for protons (Nspectator p true vs. EZP)
- TF1 *fZPCen = new TF1("fZPCen",
- "(-1.321353+sqrt(1.321353*1.321353-4*(-0.007283)*(3.550697-x)))/(2*(-0.007283))",0.,60.);
- TF1 *fZPPer = new TF1("fZPPer",
- "(-42.643308-sqrt(42.643308*42.643308-4*(-0.310786)*(-1402.945615-x)))/(2*(-0.310786))",0.,60.);
- // Fit results for total number of spectators (Nspectators true vs. EZDC)
- TF1 *fZDCCen = new TF1("fZDCCen",
- "(-1.934991+sqrt(1.934991*1.934991-4*(-0.004080)*(15.111124-x)))/(2*(-0.004080))",0.,225.);
- TF1 *fZDCPer = new TF1("fZDCPer",
- "(-34.380639-sqrt(34.380639*34.380639-4*(-0.104251)*(-2612.189017-x)))/(2*(-0.104251))",0.,225.);
- // --------------------------------------------------------------------------------------------------
- // [1] ### Results in Chiara's PhD thesis -> 0<b<15 fm (Dec 2001)
- /*// Fit results for b (b vs. EZDC)
- //TF1 *fbCen = new TF1("fbCen","0.611543+0.052231*x-0.000112*x*x+0.000000374*x*x*x",0.,222.);
- //TF1 *fbPer = new TF1("fbPer","16.552010-0.023866*x-0.00001*x*x",0.,222.);
- TF1 *fbCen = new TF1("fbCen","0.612769+0.051929*x-0.0001074*x*x+0.0000003724*x*x*x",0.,225.);
- TF1 *fbPer = new TF1("fbPer","16.6131016-0.026053*x+0.000006893*x*x",0.,225.);*/
- // --------------------------------------------------------------------------------------------------
- // [2] ### Results from a new production -> 0<b<18 fm (Apr 2002)
- TF1 *fbCen = new TF1("fbCen","-0.056923+0.079703*x-0.0004301*x*x+0.000001366*x*x*x",0.,220.);
- TF1 *fbPer = new TF1("fbPer","17.943998-0.046846*x+0.000074*x*x",0.,220.);
- // --------------------------------------------------------------------------------------------------
- // Evaluating Nspectators and b from ZEM energy
- // [1] ### Results in Chiara's PhD thesis -> 0<b<15 fm (Dec 2001)
- /*TF1 *fZEMn = new TF1("fZEMn","124.2-0.0566*x+0.000006014*x*x",0.,3500.);
- TF1 *fZEMp = new TF1("fZEMp","81.3-0.03834*x+0.000004359*x*x",0.,3500.);
- TF1 *fZEMsp = new TF1("fZEMsp","205.6-0.09567*x+0.00001056*x*x",0.,3500.);
- TF1 *fZEMb = new TF1("fZEMb","15.8-0.02084*x+2.802e-5*x*x-2.007e-8*x*x*x+6.586e-12*x*x*x*x-8.042e-16*x*x*x*x*x",0.,3500.);*/
- // --------------------------------------------------------------------------------------------------
- // [2] ### Results from a new production -> 0<b<18 fm (Apr 2002)
- TF1 *fZEMn = new TF1("fZEMn","126.2-0.05399*x+0.000005679*x*x",0.,4000.);
- TF1 *fZEMp = new TF1("fZEMp","82.49-0.03611*x+0.00000385*x*x",0.,4000.);
- TF1 *fZEMsp = new TF1("fZEMsp","208.7-0.09006*x+0.000009526*x*x",0.,4000.);
- TF1 *fZEMb = new TF1("fZEMb","16.06-0.01633*x+1.44e-5*x*x-6.778e-9*x*x*x+1.438e-12*x*x*x*x-1.112e-16*x*x*x*x*x",0.,4000.);
-
- Int_t NGenSpecN=0, NGenSpecP=0, NGenSpec=0;
- Double_t ImpPar=0;
- // Cut value for Ezem (GeV)
- // [1] ### Results in Chiara's PhD thesis -> 0<b<15 fm (Dec 2001)
- //Float_t EZEMCut = 360.;
- // [2] ### Results from a new production -> 0<b<18 fm (Apr 2002)
- Float_t EZEMCut = 420.;
- Float_t DeltaEZEMSup = 690.;
- Float_t DeltaEZEMInf = 270.;
- if(ZEMenergy > (EZEMCut+DeltaEZEMSup)){
- NGenSpecN = (Int_t) (fZNCen->Eval(ZNenergy));
- NGenSpecP = (Int_t) (fZPCen->Eval(ZPenergy));
- NGenSpec = (Int_t) (fZDCCen->Eval(ZDCenergy));
- ImpPar = fbCen->Eval(ZDCenergy);
- //printf(" fZNCen = %f, fZPCen = %f, fZDCCen = %f\n",fZNCen->Eval(ZNenergy),
- // fZPCen->Eval(ZPenergy),fZDCCen->Eval(ZDCenergy));
- }
- else if(ZEMenergy < (EZEMCut-DeltaEZEMInf)){
- NGenSpecN = (Int_t) (fZNPer->Eval(ZNenergy));
- NGenSpecP = (Int_t) (fZPPer->Eval(ZPenergy));
- NGenSpec = (Int_t) (fZDCPer->Eval(ZDCenergy));
- ImpPar = fbPer->Eval(ZDCenergy);
- //printf(" fZNPer = %f, fZPPer = %f, fZDCPer = %f\n",fZNPer->Eval(ZNenergy),
- // fZPPer->Eval(ZPenergy),fZDCPer->Eval(ZDCenergy));