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17 //_________________________________________________________________________
18 // Class for the management by the Emc reconstruction.
20 //*-- Author : Boris Polichtchouk (IHEP, Protvino) 6 Mar 2001
22 // --- ROOT system ---
24 // --- Standard library ---
26 // --- AliRoot header files ---
28 #include "AliPHOSRecEmcManager.h"
30 ClassImp(AliPHOSRecEmcManager)
32 //____________________________________________________________________________
34 AliPHOSRecEmcManager::AliPHOSRecEmcManager()
37 // fOneGamChisqCut = 3.;
38 fOneGamChisqCut = 1.3; // bvp 31.08.2001
40 fOneGamInitialStep = 0.00005;
42 fOneGamStepMin = 0.0005;
43 fOneGamNumOfIterations = 50;
45 fTwoGamInitialStep = 0.00005;
48 fTwoGamStepMin = 0.00005;
49 fTwoGamNumOfIterations = 50;
54 // fSqdCut = 0.5; // bvp 31.08.2001
57 SetTitle("Emc Reconstruction Manager");
61 AliPHOSRecEmcManager::~AliPHOSRecEmcManager(void) {}
63 Float_t AliPHOSRecEmcManager::Dispersion(Float_t ei) const
65 //"Dispresion" of energy deposition in the cell.
66 // eTot is the total shower energy, ai is the
67 // calculated cell response,
68 // ei is the measured cell response.
73 Float_t AliPHOSRecEmcManager::OneGamChi2(Float_t ai, Float_t ei, Float_t fi, Float_t& gi) const
75 // Chi2 used in OneGam (one-gamma fitting).
76 // gi is d(Chi2)/d(ai).
80 Float_t d = ei; // we assume that sigma(E) = sqrt(E)
87 Float_t AliPHOSRecEmcManager::TwoGamChi2(Float_t ai, Float_t ei, Float_t fi, Float_t& gi) const
92 Float_t d = ei; // we assume that sigma(E) = sqrt(E)
99 void AliPHOSRecEmcManager::AG(Float_t ei, Float_t xi, Float_t yi, Float_t& ai, Float_t& gxi, Float_t& gyi )
101 //Calculates amplitude (ai) and gradients (gxi, gyi) of CPV pad response.
102 //Integrated response (total "shower energy") is E,
103 //xi and yi are the distances along x and y from reference point
104 // to the pad center.
105 //Shape of the shower is from PHOS TDR.
108 Float_t r = TMath::Sqrt(xi*xi + yi*yi);
109 Float_t r4 = r*r*r*r ;
110 Float_t r295 = TMath::Power(r, 2.95) ;
111 Float_t shape = ei*TMath::Exp( -r4 * (1. / (2.32 + 0.26 * r4) + 0.0316 / (1 + 0.0652 * r295) ) ) ;
116 gxi = (-(TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),2)*
117 ((-0.006077944*xi*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),
118 0.4750000000000001))/
119 TMath::Power(1 + 0.0652*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),1.475),2) -
120 (1.04*xi*(TMath::Power(xi,2) + TMath::Power(yi,2)))/
121 TMath::Power(2.32 + 0.26*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),2),2))) -
122 4*xi*(TMath::Power(xi,2) + TMath::Power(yi,2))*
123 (0.0316/(1 + 0.0652*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),1.475)) +
124 1./(2.32 + 0.26*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),2))))/
125 TMath::Power(TMath::E(),TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),2)*
126 (0.0316/(1 + 0.0652*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),1.475)) +
127 1./(2.32 + 0.26*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),2))));
132 gyi = (-(TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),2)*
133 ((-0.006077944*yi*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),
134 0.4750000000000001))/
135 TMath::Power(1 + 0.0652*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),1.475),2) -
136 (1.04*yi*(TMath::Power(xi,2) + TMath::Power(yi,2)))/
137 TMath::Power(2.32 + 0.26*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),2),2))) -
138 4*yi*(TMath::Power(xi,2) + TMath::Power(yi,2))*
139 (0.0316/(1 + 0.0652*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),1.475)) +
140 1./(2.32 + 0.26*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),2))))/
141 TMath::Power(TMath::E(),TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),2)*
142 (0.0316/(1 + 0.0652*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),1.475)) +
143 1./(2.32 + 0.26*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),2))));