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cbd576a6 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
16 | ||
17 | //_________________________________________________________________________ | |
18 | // Class for the management by the Emc reconstruction. | |
386aef34 | 19 | //// |
cbd576a6 | 20 | //*-- Author : Boris Polichtchouk (IHEP, Protvino) 6 Mar 2001 |
21 | // | |
22 | // --- ROOT system --- | |
23 | ||
24 | // --- Standard library --- | |
25 | ||
cbd576a6 | 26 | // --- AliRoot header files --- |
27 | ||
28 | #include "AliPHOSRecEmcManager.h" | |
cbd576a6 | 29 | |
30 | ClassImp(AliPHOSRecEmcManager) | |
31 | ||
32 | //____________________________________________________________________________ | |
33 | ||
3f7dbdb7 | 34 | AliPHOSRecEmcManager::AliPHOSRecEmcManager(): |
35 | fOneGamChisqCut(1.3f), | |
36 | fOneGamInitialStep(0.00005f), | |
37 | fOneGamChisqMin(1.f), | |
38 | fOneGamStepMin(0.0005f), | |
39 | fOneGamNumOfIterations(50), | |
40 | fTwoGamInitialStep(0.00005f), | |
41 | fTwoGamChisqMin(1.f), | |
42 | fTwoGamEmin(0.1f), | |
43 | fTwoGamStepMin(0.00005), | |
44 | fTwoGamNumOfIterations(50), | |
45 | fThr0(0.f), | |
46 | fSqdCut(0.f) | |
cbd576a6 | 47 | { |
386aef34 | 48 | // default ctor |
cbd576a6 | 49 | SetTitle("Emc Reconstruction Manager"); |
cbd576a6 | 50 | } |
51 | ||
52 | AliPHOSRecEmcManager::~AliPHOSRecEmcManager(void) {} | |
53 | ||
90cceaf6 | 54 | Float_t AliPHOSRecEmcManager::Dispersion(Float_t ei) const |
cbd576a6 | 55 | { |
56 | //"Dispresion" of energy deposition in the cell. | |
386aef34 | 57 | // eTot is the total shower energy, ai is the |
cbd576a6 | 58 | // calculated cell response, |
386aef34 | 59 | // ei is the measured cell response. |
cbd576a6 | 60 | |
386aef34 | 61 | return ei; |
cbd576a6 | 62 | } |
63 | ||
e957fea8 | 64 | Float_t AliPHOSRecEmcManager::OneGamChi2(Float_t ai, Float_t ei, Float_t fi, Float_t& gi) const |
cbd576a6 | 65 | { |
66 | // Chi2 used in OneGam (one-gamma fitting). | |
386aef34 | 67 | // gi is d(Chi2)/d(ai). |
cbd576a6 | 68 | |
e957fea8 | 69 | fi = 0 ; |
386aef34 | 70 | Float_t da = ai - ei; |
71 | Float_t d = ei; // we assume that sigma(E) = sqrt(E) | |
72 | gi = 2.*(ai-ei)/d; | |
cbd576a6 | 73 | |
386aef34 | 74 | return da*da/d; |
cbd576a6 | 75 | |
76 | } | |
77 | ||
e957fea8 | 78 | Float_t AliPHOSRecEmcManager::TwoGamChi2(Float_t ai, Float_t ei, Float_t fi, Float_t& gi) const |
cbd576a6 | 79 | { |
386aef34 | 80 | // calculates chi^2 |
e957fea8 | 81 | fi = 0 ; |
386aef34 | 82 | Float_t da = ai - ei; |
83 | Float_t d = ei; // we assume that sigma(E) = sqrt(E) | |
84 | gi = 2.*(ai-ei)/d; | |
cbd576a6 | 85 | |
386aef34 | 86 | return da*da/d; |
cbd576a6 | 87 | |
88 | } | |
89 | ||
386aef34 | 90 | void AliPHOSRecEmcManager::AG(Float_t ei, Float_t xi, Float_t yi, Float_t& ai, Float_t& gxi, Float_t& gyi ) |
cbd576a6 | 91 | { |
386aef34 | 92 | //Calculates amplitude (ai) and gradients (gxi, gyi) of CPV pad response. |
cbd576a6 | 93 | //Integrated response (total "shower energy") is E, |
386aef34 | 94 | //xi and yi are the distances along x and y from reference point |
cbd576a6 | 95 | // to the pad center. |
96 | //Shape of the shower is from PHOS TDR. | |
97 | ||
98 | ||
386aef34 | 99 | Float_t r = TMath::Sqrt(xi*xi + yi*yi); |
cbd576a6 | 100 | Float_t r4 = r*r*r*r ; |
101 | Float_t r295 = TMath::Power(r, 2.95) ; | |
386aef34 | 102 | Float_t shape = ei*TMath::Exp( -r4 * (1. / (2.32 + 0.26 * r4) + 0.0316 / (1 + 0.0652 * r295) ) ) ; |
103 | ai = shape; | |
cbd576a6 | 104 | |
105 | ||
386aef34 | 106 | //d(shape)/d(xi) |
107 | gxi = (-(TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),2)* | |
108 | ((-0.006077944*xi*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2), | |
cbd576a6 | 109 | 0.4750000000000001))/ |
386aef34 | 110 | TMath::Power(1 + 0.0652*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),1.475),2) - |
111 | (1.04*xi*(TMath::Power(xi,2) + TMath::Power(yi,2)))/ | |
112 | TMath::Power(2.32 + 0.26*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),2),2))) - | |
113 | 4*xi*(TMath::Power(xi,2) + TMath::Power(yi,2))* | |
114 | (0.0316/(1 + 0.0652*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),1.475)) + | |
115 | 1./(2.32 + 0.26*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),2))))/ | |
116 | TMath::Power(TMath::E(),TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),2)* | |
117 | (0.0316/(1 + 0.0652*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),1.475)) + | |
118 | 1./(2.32 + 0.26*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),2)))); | |
cbd576a6 | 119 | |
386aef34 | 120 | gxi = gxi*ei; |
cbd576a6 | 121 | |
386aef34 | 122 | //d(shape)/d(yi) |
123 | gyi = (-(TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),2)* | |
124 | ((-0.006077944*yi*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2), | |
cbd576a6 | 125 | 0.4750000000000001))/ |
386aef34 | 126 | TMath::Power(1 + 0.0652*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),1.475),2) - |
127 | (1.04*yi*(TMath::Power(xi,2) + TMath::Power(yi,2)))/ | |
128 | TMath::Power(2.32 + 0.26*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),2),2))) - | |
129 | 4*yi*(TMath::Power(xi,2) + TMath::Power(yi,2))* | |
130 | (0.0316/(1 + 0.0652*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),1.475)) + | |
131 | 1./(2.32 + 0.26*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),2))))/ | |
132 | TMath::Power(TMath::E(),TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),2)* | |
133 | (0.0316/(1 + 0.0652*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),1.475)) + | |
134 | 1./(2.32 + 0.26*TMath::Power(TMath::Power(xi,2) + TMath::Power(yi,2),2)))); | |
135 | ||
136 | ||
137 | gyi = gyi*ei; | |
cbd576a6 | 138 | |
139 | } | |
140 | ||
141 | ||
142 | ||
143 | ||
144 | ||
145 | ||
146 |