sprintf replaced by snprintf.
[u/mrichter/AliRoot.git] / FASTSIM / AliFastGlauber.h
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5b3a5a5d 1#ifndef ALIFASTGLAUBER_H
2#define ALIFASTGLAUBER_H
3/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
5
6/* $Id$ */
a42548b0 7
041f7f97 8// Utility class to make simple Glauber type calculations for collision geometries:
9// Impact parameter, production points, reaction plane dependence
a42548b0 10// Author: Andreas Morsch
11// andreas.morsch@cern.ch
5b3a5a5d 12
13#include <TObject.h>
65aa45f2 14#include <TString.h>
5b3a5a5d 15class TF1;
a42548b0 16class TF2;
17
5b3a5a5d 18
19class AliFastGlauber : public TObject {
20 public:
18b7a4a1 21 static AliFastGlauber* Instance();
65aa45f2 22 virtual ~AliFastGlauber();
23 void Init(Int_t mode = 0);
24
5b3a5a5d 25 void SetWoodSaxonParameters(Double_t r0, Double_t d, Double_t w, Double_t n)
26 {fWSr0 = r0; fWSd = d; fWSw = w; fWSn = n;}
65aa45f2 27 void SetWoodSaxonParametersAu()
28 {fWSr0 = 6.38; fWSd = 0.535; fWSw = 0.; fWSn = 8.59e-4;}
29 void SetWoodSaxonParametersPb()
a42548b0 30 {fWSr0 = 6.78; fWSd = 0.54; fWSw = 0.; fWSn = 7.14e-4;}
041f7f97 31 void SetMaxImpact(Float_t bmax = 20.) {fgBMax = bmax;};
65aa45f2 32 void SetHardCrossSection(Float_t xs = 1.0) {fSigmaHard = xs;}
33 void SetNNCrossSection (Float_t xs = 55.6) {fSigmaNN = xs;}
34 void SetNucleus(Int_t n=208) {fA=n;}
35 void SetAuAuRhic();
36 void SetPbPbLHC();
37 void SetFileName(TString &fn){fName=fn;}
d3d4a92f 38 void SetFileName(const char *fn="$(ALICE_ROOT)/FASTSIM/data/glauberPbPb.root"){fName=fn;}
a2f2f511 39
65aa45f2 40 const TF1* GetWSB() const {return fgWSb;}
41 const TF2* GetWSbz() const {return fgWSbz;}
42 const TF1* GetWSz() const {return fgWSz;}
43 const TF1* GetWSta() const {return fgWSta;}
710a8d90 44 const TF2* Kernel() const {return fgWStarfi;}
65aa45f2 45 const TF2* GetWStarfi() const {return fgWStarfi;}
46 const TF2* GetWKParticipants() const {return fgWKParticipants;}
47 const TF1* GetWParticipants() const {return fgWParticipants;}
710a8d90 48 const TF1* Overlap() const {return fgWStaa;}
65aa45f2 49 const TF1* GetWStaa() const {return fgWStaa;}
50 const TF2* GetWAlmond() const {return fgWAlmond;}
51 const TF1* GetWPathLength0() const {return fgWPathLength0;}
52 const TF1* GetWPathLength() const {return fgWPathLength;}
53 const TF1* GetWIntRadius() const {return fgWIntRadius;}
54 const TF1* GetWSgeo() const {return fgWSgeo;}
55 const TF1* GetWSbinary() const {return fgWSbinary;}
56 const TF1* GetWSN() const {return fgWSN;}
57 const TF1* GetWEnergyDensity() const {return fgWEnergyDensity;}
7f2f270b 58 const TF2* GetWAlmondFixedB(Int_t i) const {return fgWAlmondFixedB[i];}
f3a04204 59
710a8d90 60 Float_t GetWr0() const {return fWSr0;}
61 Float_t GetWSd() const {return fWSd;}
62 Float_t GetWSw() const {return fWSw;}
63 Float_t GetWSn() const {return fWSn;}
64 Float_t GetSigmaHard() const {return fSigmaHard;}
65 Float_t GetSigmaNN() const {return fSigmaNN;}
66 Int_t GetA() const {return fA;}
710a8d90 67 const TString* GetFileName() const {return &fName;}
68 Float_t GetBmin() const {return fBmin;}
69 Float_t GetBmax() const {return fBmax;}
70
71 void DrawWSb() const;
72 void DrawThickness() const;
73 void DrawOverlap() const;
74 void DrawParticipants() const;
75 void DrawGeo() const;
76 void DrawBinary() const;
77 void DrawN() const;
78 void DrawKernel(Double_t b = 0.) const;
79 void DrawAlmond(Double_t b = 0.) const;
80 void DrawPathLength0(Double_t b = 0., Int_t iopt = 0) const;
81 void DrawPathLength(Double_t b, Int_t ni = 1000, Int_t iopt = 0) const;
82 void DrawIntRadius(Double_t b = 0.) const;
83 void DrawEnergyDensity() const;
f3a04204 84
710a8d90 85 Double_t CrossSection(Double_t b1, Double_t b2) const;
86 Double_t HardCrossSection(Double_t b1, Double_t b2) const;
f762082f 87 Double_t NHard(Double_t b1, Double_t b2) const;
710a8d90 88 Double_t FractionOfHardCrossSection(Double_t b1, Double_t b2) const;
89 Double_t Binaries(Double_t b) const;
90 Double_t GetNumberOfBinaries(Double_t b) const;
91 Double_t Participants(Double_t b) const;
92 Double_t GetNumberOfParticipants(Double_t b) const;
93 Double_t GetNumberOfCollisions(Double_t b) const;
148c5ce5 94 Double_t GetNumberOfCollisionsPerEvent(Double_t b) const;
a42548b0 95 Double_t MeanOverlap(Double_t b1, Double_t b2);
96 Double_t MeanNumberOfCollisionsPerEvent(Double_t b1, Double_t b2);
5b3a5a5d 97 void SimulateTrigger(Int_t n);
98 void GetRandom(Float_t& b, Float_t& p, Float_t& mult);
c2140715 99 void GetRandom(Int_t& bin, Bool_t& hard);
65aa45f2 100 Double_t GetRandomImpactParameter(Double_t bmin, Double_t bmax);
65aa45f2 101
710a8d90 102 void StoreFunctions() const;
103 void StoreAlmonds() const;
104
65aa45f2 105 void SetLengthDefinition(Int_t def=1) {fEllDef=def;}
e9663638 106 Int_t GetLengthDef() const {return fEllDef;}
65aa45f2 107 void SetCentralityClass(Double_t xsecFrLow=0.0,Double_t xsecFrUp=0.1);
a2f2f511 108 void GetRandomBHard(Double_t& b);
109 void GetRandomXY(Double_t& x,Double_t& y);
462421a4 110 void GetSavedXY(Double_t xy[2]) {xy[0] = fXY[0]; xy[1] = fXY[1];}
111 void GetSavedI0I1(Double_t i0i1[2]) {i0i1[0] = fI0I1[0]; i0i1[1] = fI0I1[1];}
112 void SaveXY(Double_t x, Double_t y) {fXY[0] = x; fXY[1] = y;}
113 void SaveI0I1(Double_t i0, Double_t i1) {fI0I1[0] = i0; fI0I1[1] = i1;}
114
a2f2f511 115 void GetRandomPhi(Double_t& phi);
116 Double_t CalculateLength(Double_t b=0.,Double_t x0=0.,Double_t y0=0.,
710a8d90 117 Double_t phi0=0.);
83f67d08 118 void GetLengthAndPhi(Double_t& ell,Double_t &phi,Double_t b=-1.);
a2f2f511 119 void GetLength(Double_t& ell,Double_t b=-1.);
83f67d08 120 void GetLengthsBackToBackAndPhi(Double_t& ell1,Double_t& ell2,
121 Double_t &phi,
122 Double_t b=-1.);
123 void GetLengthsBackToBack(Double_t& ell1,Double_t& ell2,
124 Double_t b=-1.);
a2f2f511 125 void GetLengthsForPythia(Int_t n,Double_t* phi,Double_t* ell,
126 Double_t b=-1.);
127 void PlotBDistr(Int_t n=1000);
128 void PlotLengthDistr(Int_t n=1000,Bool_t save=kFALSE,
d3d4a92f 129 const char *fname="length.root");
a2f2f511 130 void PlotLengthB2BDistr(Int_t n=1000,Bool_t save=kFALSE,
d3d4a92f 131 const char *fname="lengthB2B.root");
65aa45f2 132 void CalculateI0I1(Double_t& integral0,Double_t& integral1,
133 Double_t b=0.,
134 Double_t x0=0.,Double_t y0=0.,Double_t phi0=0.,
710a8d90 135 Double_t ellCut=20.) const;
83f67d08 136 void GetI0I1AndPhi(Double_t& integral0,Double_t& integral1,Double_t &phi,
137 Double_t ellCut=20.,Double_t b=-1.);
65aa45f2 138 void GetI0I1(Double_t& integral0,Double_t& integral1,
139 Double_t ellCut=20.,Double_t b=-1.);
83f67d08 140 void GetI0I1BackToBackAndPhi(Double_t& integral01,Double_t& integral11,
141 Double_t& integral02,Double_t& integral12,
142 Double_t& phi,
143 Double_t ellCut=20.,Double_t b=-1.);
c54404bf 144 void GetI0I1BackToBackAndPhiAndXY(Double_t& integral01,Double_t& integral11,
145 Double_t& integral02,Double_t& integral12,
146 Double_t& phi,Double_t& x,Double_t&y,
147 Double_t ellCut=20.,Double_t b=-1.);
65aa45f2 148 void GetI0I1BackToBack(Double_t& integral01,Double_t& integral11,
149 Double_t& integral02,Double_t& integral12,
150 Double_t ellCut=20.,Double_t b=-1.);
151 void GetI0I1ForPythia(Int_t n,Double_t* phi,
152 Double_t* integral0,Double_t* integral1,
153 Double_t ellCut=20.,Double_t b=-1.);
2e3b5c95 154 void GetI0I1ForPythiaAndXY(Int_t n,Double_t* phi,
155 Double_t* integral0,Double_t* integral1,
156 Double_t&x, Double_t &y,
157 Double_t ellCut=20.,Double_t b=-1.);
65aa45f2 158 void PlotI0I1Distr(Int_t n=1000,Double_t ellCut=20.,Bool_t save=kFALSE,
d3d4a92f 159 const char *fname="i0i1.root");
65aa45f2 160 void PlotI0I1B2BDistr(Int_t n=1000,Double_t ellCut=20.,Bool_t save=kFALSE,
d3d4a92f 161 const char *fname="i0i1B2B.root");
710a8d90 162 void PlotAlmonds() const;
a42548b0 163 // Copy
164 AliFastGlauber& operator=(const AliFastGlauber & rhs);
165 void Copy(TObject&) const;
5b3a5a5d 166 protected:
0c13ae32 167 static Double_t WSb (const Double_t *xx, const Double_t *par);
168 static Double_t WSbz (const Double_t *xx, const Double_t *par);
169 static Double_t WSz (const Double_t *xx, const Double_t *par);
170 static Double_t WSta (const Double_t *xx, const Double_t *par);
171 static Double_t WStarfi (const Double_t *xx, const Double_t *par);
172 static Double_t WStaa (const Double_t *xx, const Double_t *par);
173 static Double_t WKParticipants (const Double_t *xx, const Double_t *par);
174 static Double_t WParticipants (const Double_t *xx, const Double_t *par);
175 static Double_t WSgeo (const Double_t *xx, const Double_t *par);
176 static Double_t WSbinary (const Double_t *xx, const Double_t *par);
177 static Double_t WSN (const Double_t *xx, const Double_t *par);
178 static Double_t WAlmond (const Double_t *xx, const Double_t *par);
179 static Double_t WPathLength0 (const Double_t *xx, const Double_t *par);
180 static Double_t WPathLength (const Double_t *xx, const Double_t *par);
181 static Double_t WIntRadius (const Double_t *xx, const Double_t *par);
182 static Double_t WEnergyDensity (const Double_t *xx, const Double_t *par);
fac5662b 183
a42548b0 184 void Reset() const;
18b7a4a1 185 private:
186 AliFastGlauber();
187 AliFastGlauber(const AliFastGlauber& glauber);
65aa45f2 188
18b7a4a1 189 static Float_t fgBMax; // Maximum Impact Parameter
190 static const Int_t fgkMCInts; // Number of MC integrations
191 static AliFastGlauber* fgGlauber; // Singleton instance
192
193
041f7f97 194 static TF1* fgWSb; // Wood-Saxon Function (b)
195 static TF2* fgWSbz; // Wood-Saxon Function (b, z)
196 static TF1* fgWSz; // Wood-Saxon Function (b = b0, z)
197 static TF1* fgWSta; // Thickness Function
198 static TF2* fgWStarfi; // Kernel for Overlap Function
1bc228f5 199 static TF2* fgWKParticipants; // Kernel for number of participants
200 static TF1* fgWParticipants; // Number of participants
041f7f97 201 static TF1* fgWStaa; // Overlap Function
202 static TF2* fgWAlmond; // Interaction Almond
203 static TF1* fgWPathLength0; // Path Length as a function of phi
204 static TF1* fgWPathLength; // Path Length as a function of phi
205 static TF1* fgWIntRadius; // Interaction Radius
206 static TF1* fgWSgeo; // dSigma/db geometric
207 static TF1* fgWSbinary; // dSigma/db binary
208 static TF1* fgWSN; // dN/db binary
209 static TF1* fgWEnergyDensity; // Energy density as a function of impact parameter
7f2f270b 210 static TF2* fgWAlmondFixedB[40]; // Interaction Almonds read from file
65aa45f2 211 static TF2* fgWAlmondCurrent; // Interaction Almond used for length
5b3a5a5d 212
65aa45f2 213 Float_t fWSr0; // Wood-Saxon Parameter r0
214 Float_t fWSd; // Wood-Saxon Parameter d
215 Float_t fWSw; // Wood-Saxon Parameter w
216 Float_t fWSn; // Wood-Saxon Parameter n
217 // (chosen such that integral is one)
218 Float_t fSigmaHard; // Hard Cross Section [mbarn]
219 Float_t fSigmaNN; // NN Cross Section [mbarn]
220 Int_t fA; // Nucleon number of nucleus A
a2f2f511 221
710a8d90 222 Float_t fBmin; // Minimum b (set through centrality selection)
223 Float_t fBmax; // Coresponding maximum b
462421a4 224 Double_t fXY[2]; // Current generated production point
225 Double_t fI0I1[2]; // Current integrals I0 and I1
65aa45f2 226 Int_t fEllDef; // definition of length (see CalculateLength())
5373d3f7 227 TString fName; // filename of stored distributions
7f2f270b 228 ClassDef(AliFastGlauber,2) // Event geometry simulation in the Glauber Model
5b3a5a5d 229};
230
231#endif