X-Git-Url: http://git.uio.no/git/?p=u%2Fmrichter%2FAliRoot.git;a=blobdiff_plain;f=FASTSIM%2FAliFastGlauber.h;h=0cd7c4e4ee757f4c4288e1adea1e4734b656ef8f;hp=cd94a214933ed3bffbd53d6d5aec35beba7d29cb;hb=87f615d8f35622afa5b37e5078a900d34caf82e1;hpb=710a8d903cb0630964c4ef2263574ab201afaa5a diff --git a/FASTSIM/AliFastGlauber.h b/FASTSIM/AliFastGlauber.h index cd94a214933..0cd7c4e4ee7 100644 --- a/FASTSIM/AliFastGlauber.h +++ b/FASTSIM/AliFastGlauber.h @@ -4,20 +4,21 @@ * See cxx source for full Copyright notice */ /* $Id$ */ -// + // Utility class to make simple Glauber type calculations for collision geometries: // Impact parameter, production points, reaction plane dependence -// -// Author: andreas.morsch@cern.ch +// Author: Andreas Morsch +// andreas.morsch@cern.ch #include #include -#include class TF1; +class TF2; + class AliFastGlauber : public TObject { public: - AliFastGlauber(); + static AliFastGlauber* Instance(); virtual ~AliFastGlauber(); void Init(Int_t mode = 0); @@ -26,34 +27,18 @@ class AliFastGlauber : public TObject { void SetWoodSaxonParametersAu() {fWSr0 = 6.38; fWSd = 0.535; fWSw = 0.; fWSn = 8.59e-4;} void SetWoodSaxonParametersPb() - {fWSr0 = 6.624; fWSd = 0.549; fWSw = 0.; fWSn = 7.69e-4;} + {fWSr0 = 6.78; fWSd = 0.54; fWSw = 0.; fWSn = 7.14e-4;} void SetMaxImpact(Float_t bmax = 20.) {fgBMax = bmax;}; void SetHardCrossSection(Float_t xs = 1.0) {fSigmaHard = xs;} void SetNNCrossSection (Float_t xs = 55.6) {fSigmaNN = xs;} void SetNucleus(Int_t n=208) {fA=n;} void SetAuAuRhic(); void SetPbPbLHC(); - void SetFileName(TString &fn){fName=fn;} - void SetFileName(Char_t *fn="$(ALICE_ROOT)/FASTSIM/data/glauberPbPb.root"){fName=fn;} - - static Double_t WSb (Double_t *xx, Double_t *par); - static Double_t WSbz (Double_t *xx, Double_t *par); - static Double_t WSz (Double_t *xx, Double_t *par); - static Double_t WSta (Double_t *xx, Double_t *par); - static Double_t WStarfi (Double_t *xx, Double_t *par); - static Double_t WStaa (Double_t *xx, Double_t *par); - static Double_t WKParticipants (Double_t *xx, Double_t *par); - static Double_t WParticipants (Double_t *xx, Double_t *par); - static Double_t WSgeo (Double_t *xx, Double_t *par); - static Double_t WSbinary (Double_t *xx, Double_t *par); - static Double_t WSN (Double_t *xx, Double_t *par); - static Double_t WAlmond (Double_t *xx, Double_t *par); - static Double_t WPathLength0 (Double_t *xx, Double_t *par); - static Double_t WPathLength (Double_t *xx, Double_t *par); - static Double_t WIntRadius (Double_t *xx, Double_t *par); - static Double_t WEnergyDensity (Double_t *xx, Double_t *par); + void SetFileName(const TString &fn){fName=fn;} + void SetFileName(const char *fn="$(ALICE_ROOT)/FASTSIM/data/glauberPbPb.root"){fName=fn;} const TF1* GetWSB() const {return fgWSb;} + const TF1* GetRWSB() const {return fgRWSb;} const TF2* GetWSbz() const {return fgWSbz;} const TF1* GetWSz() const {return fgWSz;} const TF1* GetWSta() const {return fgWSta;} @@ -71,7 +56,7 @@ class AliFastGlauber : public TObject { const TF1* GetWSbinary() const {return fgWSbinary;} const TF1* GetWSN() const {return fgWSN;} const TF1* GetWEnergyDensity() const {return fgWEnergyDensity;} - const TF2* GetWAlmondFixedB(Int_t i) const {return &fgWAlmondFixedB[i];} + const TF2* GetWAlmondFixedB(Int_t i) const {return fgWAlmondFixedB[i];} Float_t GetWr0() const {return fWSr0;} Float_t GetWSd() const {return fWSd;} @@ -80,7 +65,6 @@ class AliFastGlauber : public TObject { Float_t GetSigmaHard() const {return fSigmaHard;} Float_t GetSigmaNN() const {return fSigmaNN;} Int_t GetA() const {return fA;} - Int_t GetEllDef() const {return fEllDef;} const TString* GetFileName() const {return &fName;} Float_t GetBmin() const {return fBmin;} Float_t GetBmax() const {return fBmax;} @@ -101,13 +85,16 @@ class AliFastGlauber : public TObject { Double_t CrossSection(Double_t b1, Double_t b2) const; Double_t HardCrossSection(Double_t b1, Double_t b2) const; + Double_t NHard(Double_t b1, Double_t b2) const; Double_t FractionOfHardCrossSection(Double_t b1, Double_t b2) const; Double_t Binaries(Double_t b) const; Double_t GetNumberOfBinaries(Double_t b) const; Double_t Participants(Double_t b) const; Double_t GetNumberOfParticipants(Double_t b) const; Double_t GetNumberOfCollisions(Double_t b) const; - + Double_t GetNumberOfCollisionsPerEvent(Double_t b) const; + Double_t MeanOverlap(Double_t b1, Double_t b2); + Double_t MeanNumberOfCollisionsPerEvent(Double_t b1, Double_t b2); void SimulateTrigger(Int_t n); void GetRandom(Float_t& b, Float_t& p, Float_t& mult); void GetRandom(Int_t& bin, Bool_t& hard); @@ -117,46 +104,97 @@ class AliFastGlauber : public TObject { void StoreAlmonds() const; void SetLengthDefinition(Int_t def=1) {fEllDef=def;} + Int_t GetLengthDef() const {return fEllDef;} void SetCentralityClass(Double_t xsecFrLow=0.0,Double_t xsecFrUp=0.1); void GetRandomBHard(Double_t& b); void GetRandomXY(Double_t& x,Double_t& y); + void GetSavedXY(Double_t xy[2]) const {xy[0] = fXY[0]; xy[1] = fXY[1];} + void GetSavedI0I1(Double_t i0i1[2]) const {i0i1[0] = fI0I1[0]; i0i1[1] = fI0I1[1];} + void SaveXY(Double_t x, Double_t y) {fXY[0] = x; fXY[1] = y;} + void SaveI0I1(Double_t i0, Double_t i1) {fI0I1[0] = i0; fI0I1[1] = i1;} + void GetRandomPhi(Double_t& phi); Double_t CalculateLength(Double_t b=0.,Double_t x0=0.,Double_t y0=0., Double_t phi0=0.); + void GetLengthAndPhi(Double_t& ell,Double_t &phi,Double_t b=-1.); void GetLength(Double_t& ell,Double_t b=-1.); - void GetLengthsBackToBack(Double_t& ell1,Double_t& ell2,Double_t b=-1.); - void GetLengthsForPythia(Int_t n,Double_t* phi,Double_t* ell, + void GetLengthsBackToBackAndPhi(Double_t& ell1,Double_t& ell2, + Double_t &phi, + Double_t b=-1.); + void GetLengthsBackToBack(Double_t& ell1,Double_t& ell2, + Double_t b=-1.); + void GetLengthsForPythia(Int_t n,Double_t* const phi,Double_t* ell, Double_t b=-1.); void PlotBDistr(Int_t n=1000); void PlotLengthDistr(Int_t n=1000,Bool_t save=kFALSE, - Char_t *fname="length.root"); + const char *fname="length.root"); void PlotLengthB2BDistr(Int_t n=1000,Bool_t save=kFALSE, - Char_t *fname="lengthB2B.root"); + const char *fname="lengthB2B.root"); void CalculateI0I1(Double_t& integral0,Double_t& integral1, Double_t b=0., Double_t x0=0.,Double_t y0=0.,Double_t phi0=0., Double_t ellCut=20.) const; + void GetI0I1AndPhi(Double_t& integral0,Double_t& integral1,Double_t &phi, + Double_t ellCut=20.,Double_t b=-1.); void GetI0I1(Double_t& integral0,Double_t& integral1, Double_t ellCut=20.,Double_t b=-1.); + void GetI0I1BackToBackAndPhi(Double_t& integral01,Double_t& integral11, + Double_t& integral02,Double_t& integral12, + Double_t& phi, + Double_t ellCut=20.,Double_t b=-1.); + void GetI0I1BackToBackAndPhiAndXY(Double_t& integral01,Double_t& integral11, + Double_t& integral02,Double_t& integral12, + Double_t& phi,Double_t& x,Double_t&y, + Double_t ellCut=20.,Double_t b=-1.); void GetI0I1BackToBack(Double_t& integral01,Double_t& integral11, Double_t& integral02,Double_t& integral12, Double_t ellCut=20.,Double_t b=-1.); void GetI0I1ForPythia(Int_t n,Double_t* phi, Double_t* integral0,Double_t* integral1, Double_t ellCut=20.,Double_t b=-1.); + void GetI0I1ForPythiaAndXY(Int_t n,Double_t* phi, + Double_t* integral0,Double_t* integral1, + Double_t&x, Double_t &y, + Double_t ellCut=20.,Double_t b=-1.); void PlotI0I1Distr(Int_t n=1000,Double_t ellCut=20.,Bool_t save=kFALSE, - Char_t *fname="i0i1.root"); + const char *fname="i0i1.root"); void PlotI0I1B2BDistr(Int_t n=1000,Double_t ellCut=20.,Bool_t save=kFALSE, - Char_t *fname="i0i1B2B.root"); + const char *fname="i0i1B2B.root"); void PlotAlmonds() const; + // Copy + AliFastGlauber& operator=(const AliFastGlauber & rhs); + void Copy(TObject&) const; protected: - void Reset(); + static Double_t RWSb (const Double_t *xx, const Double_t *par); + static Double_t WSb (const Double_t *xx, const Double_t *par); + static Double_t WSbz (const Double_t *xx, const Double_t *par); + static Double_t WSz (const Double_t *xx, const Double_t *par); + static Double_t WSta (const Double_t *xx, const Double_t *par); + static Double_t WStarfi (const Double_t *xx, const Double_t *par); + static Double_t WStaa (const Double_t *xx, const Double_t *par); + static Double_t WKParticipants (const Double_t *xx, const Double_t *par); + static Double_t WParticipants (const Double_t *xx, const Double_t *par); + static Double_t WSgeo (const Double_t *xx, const Double_t *par); + static Double_t WSbinary (const Double_t *xx, const Double_t *par); + static Double_t WSN (const Double_t *xx, const Double_t *par); + static Double_t WAlmond (const Double_t *xx, const Double_t *par); + static Double_t WPathLength0 (const Double_t *xx, const Double_t *par); + static Double_t WPathLength (const Double_t *xx, const Double_t *par); + static Double_t WIntRadius (const Double_t *xx, const Double_t *par); + static Double_t WEnergyDensity (const Double_t *xx, const Double_t *par); - static Float_t fgBMax; // Maximum Impact Parameter - static Int_t fgCounter; // Counter to protect double instantiation - static const Int_t fgkMCInts; // Number of MC integrations + void Reset() const; + private: + AliFastGlauber(); + AliFastGlauber(const AliFastGlauber& glauber); + static Float_t fgBMax; // Maximum Impact Parameter + static const Int_t fgkMCInts; // Number of MC integrations + static AliFastGlauber* fgGlauber; // Singleton instance + + static TF1* fgWSb; // Wood-Saxon Function (b) + static TF1* fgRWSb; // Wood-Saxon Function (b) with phase space factor static TF2* fgWSbz; // Wood-Saxon Function (b, z) static TF1* fgWSz; // Wood-Saxon Function (b = b0, z) static TF1* fgWSta; // Thickness Function @@ -172,7 +210,7 @@ class AliFastGlauber : public TObject { static TF1* fgWSbinary; // dSigma/db binary static TF1* fgWSN; // dN/db binary static TF1* fgWEnergyDensity; // Energy density as a function of impact parameter - static TF2 fgWAlmondFixedB[40]; // Interaction Almonds read from file + static TF2* fgWAlmondFixedB[40]; // Interaction Almonds read from file static TF2* fgWAlmondCurrent; // Interaction Almond used for length Float_t fWSr0; // Wood-Saxon Parameter r0 @@ -186,10 +224,11 @@ class AliFastGlauber : public TObject { Float_t fBmin; // Minimum b (set through centrality selection) Float_t fBmax; // Coresponding maximum b - + Double_t fXY[2]; // Current generated production point + Double_t fI0I1[2]; // Current integrals I0 and I1 Int_t fEllDef; // definition of length (see CalculateLength()) - TString fName; // filename of stored distributions - ClassDef(AliFastGlauber,1) // Event geometry simulation in the Glauber Model + TString fName; // filename of stored distributions + ClassDef(AliFastGlauber,2) // Event geometry simulation in the Glauber Model }; #endif